https://github.com/ahmedbougacha updated
https://github.com/llvm/llvm-project/pull/85736
>From 75825f36ec58a2cf5d1a3f2d4de6a49ad06c02d8 Mon Sep 17 00:00:00 2001
From: Ahmed Bougacha <ah...@bougacha.org>
Date: Mon, 27 Sep 2021 08:00:00 -0700
Subject: [PATCH 1/3] [AArch64] Adopt x8+ allocation order for GPR64noip.
73078ecd381 added GPR64noip for hwasan pseudos.
Give it an allocation order that prefers allocating from x8 and up,
to match GPR64: this allows for easier regalloc, as x0-x7 are
likely to be used for parameter passing.
---
llvm/lib/Target/AArch64/AArch64RegisterInfo.td | 5 ++++-
1 file changed, 4 insertions(+), 1 deletion(-)
diff --git a/llvm/lib/Target/AArch64/AArch64RegisterInfo.td
b/llvm/lib/Target/AArch64/AArch64RegisterInfo.td
index 80d0f9c57f4b3..dfaa67dd1959d 100644
--- a/llvm/lib/Target/AArch64/AArch64RegisterInfo.td
+++ b/llvm/lib/Target/AArch64/AArch64RegisterInfo.td
@@ -234,7 +234,10 @@ def tcGPRnotx16 : RegisterClass<"AArch64", [i64], 64, (sub
tcGPR64, X16)>;
// Register set that excludes registers that are reserved for procedure calls.
// This is used for pseudo-instructions that are actually implemented using a
// procedure call.
-def GPR64noip : RegisterClass<"AArch64", [i64], 64, (sub GPR64, X16, X17, LR)>;
+def GPR64noip : RegisterClass<"AArch64", [i64], 64, (sub GPR64, X16, X17, LR)>
{
+ let AltOrders = [(rotl GPR64noip, 8)];
+ let AltOrderSelect = [{ return 1; }];
+}
// GPR register classes for post increment amount of vector load/store that
// has alternate printing when Rm=31 and prints a constant immediate value
>From 536ab53e4a300841db5850efaf0ecc5b29733e6d Mon Sep 17 00:00:00 2001
From: Ahmed Bougacha <ah...@bougacha.org>
Date: Wed, 24 Jan 2024 15:03:49 -0800
Subject: [PATCH 2/3] [AArch64][PAC] Lower authenticated calls with ptrauth
bundles.
This adds codegen support for the "ptrauth" operand bundles, which can
be used to augment indirect calls with the equivalent of an
`@llvm.ptrauth.auth` intrinsic call on the call target (possibly
preceded by an `@llvm.ptrauth.blend` on the auth discriminator if
applicable.)
This allows the generation of combined authenticating calls
on AArch64 (in the BLRA* PAuth instructions), while avoiding
the raw just-authenticated function pointer from being
exposed to attackers.
This is done by threading a PtrAuthInfo descriptor through
the call lowering infrastructure.
Note that this also applies to the other forms of indirect calls,
notably invokes, rvmarker, and tail calls. Tail-calls in particular
bring some additional complexity, with the intersecting register
constraints of BTI and PAC discriminator computation.
---
.../llvm/CodeGen/GlobalISel/CallLowering.h | 8 +
llvm/include/llvm/CodeGen/TargetLowering.h | 18 ++
llvm/lib/CodeGen/GlobalISel/CallLowering.cpp | 2 +
llvm/lib/CodeGen/GlobalISel/IRTranslator.cpp | 16 +-
.../SelectionDAG/SelectionDAGBuilder.cpp | 51 ++++-
.../SelectionDAG/SelectionDAGBuilder.h | 6 +-
llvm/lib/Target/AArch64/AArch64AsmPrinter.cpp | 90 ++++++++
.../AArch64/AArch64ExpandPseudoInsts.cpp | 43 +++-
.../Target/AArch64/AArch64ISelLowering.cpp | 103 ++++++---
llvm/lib/Target/AArch64/AArch64ISelLowering.h | 12 ++
llvm/lib/Target/AArch64/AArch64InstrInfo.cpp | 2 +
llvm/lib/Target/AArch64/AArch64InstrInfo.td | 80 +++++++
.../AArch64/GISel/AArch64CallLowering.cpp | 88 ++++++--
.../AArch64/GISel/AArch64GlobalISelUtils.cpp | 2 +-
.../AArch64/GlobalISel/ptrauth-invoke.ll | 183 ++++++++++++++++
...ranch-target-enforcement-indirect-calls.ll | 4 +-
llvm/test/CodeGen/AArch64/ptrauth-bti-call.ll | 105 ++++++++++
.../CodeGen/AArch64/ptrauth-call-rv-marker.ll | 154 ++++++++++++++
llvm/test/CodeGen/AArch64/ptrauth-call.ll | 195 ++++++++++++++++++
llvm/test/CodeGen/AArch64/ptrauth-invoke.ll | 189 +++++++++++++++++
20 files changed, 1292 insertions(+), 59 deletions(-)
create mode 100644 llvm/test/CodeGen/AArch64/GlobalISel/ptrauth-invoke.ll
create mode 100644 llvm/test/CodeGen/AArch64/ptrauth-bti-call.ll
create mode 100644 llvm/test/CodeGen/AArch64/ptrauth-call-rv-marker.ll
create mode 100644 llvm/test/CodeGen/AArch64/ptrauth-call.ll
create mode 100644 llvm/test/CodeGen/AArch64/ptrauth-invoke.ll
diff --git a/llvm/include/llvm/CodeGen/GlobalISel/CallLowering.h
b/llvm/include/llvm/CodeGen/GlobalISel/CallLowering.h
index 4c187a3068d82..fb298898304eb 100644
--- a/llvm/include/llvm/CodeGen/GlobalISel/CallLowering.h
+++ b/llvm/include/llvm/CodeGen/GlobalISel/CallLowering.h
@@ -99,6 +99,11 @@ class CallLowering {
ArgInfo() = default;
};
+ struct PointerAuthInfo {
+ Register Discriminator;
+ uint64_t Key;
+ };
+
struct CallLoweringInfo {
/// Calling convention to be used for the call.
CallingConv::ID CallConv = CallingConv::C;
@@ -125,6 +130,8 @@ class CallLowering {
MDNode *KnownCallees = nullptr;
+ std::optional<PointerAuthInfo> PAI;
+
/// True if the call must be tail call optimized.
bool IsMustTailCall = false;
@@ -587,6 +594,7 @@ class CallLowering {
bool lowerCall(MachineIRBuilder &MIRBuilder, const CallBase &Call,
ArrayRef<Register> ResRegs,
ArrayRef<ArrayRef<Register>> ArgRegs, Register SwiftErrorVReg,
+ std::optional<PointerAuthInfo> PAI,
Register ConvergenceCtrlToken,
std::function<unsigned()> GetCalleeReg) const;
diff --git a/llvm/include/llvm/CodeGen/TargetLowering.h
b/llvm/include/llvm/CodeGen/TargetLowering.h
index 7ed08cfa8a202..01c66f3f49557 100644
--- a/llvm/include/llvm/CodeGen/TargetLowering.h
+++ b/llvm/include/llvm/CodeGen/TargetLowering.h
@@ -4361,6 +4361,9 @@ class TargetLowering : public TargetLoweringBase {
/// Return true if the target supports kcfi operand bundles.
virtual bool supportKCFIBundles() const { return false; }
+ /// Return true if the target supports ptrauth operand bundles.
+ virtual bool supportPtrAuthBundles() const { return false; }
+
/// Perform necessary initialization to handle a subset of CSRs explicitly
/// via copies. This function is called at the beginning of instruction
/// selection.
@@ -4472,6 +4475,14 @@ class TargetLowering : public TargetLoweringBase {
llvm_unreachable("Not Implemented");
}
+ /// This structure contains the information necessary for lowering
+ /// pointer-authenticating indirect calls. It is equivalent to the "ptrauth"
+ /// operand bundle found on the call instruction, if any.
+ struct PtrAuthInfo {
+ uint64_t Key;
+ SDValue Discriminator;
+ };
+
/// This structure contains all information that is necessary for lowering
/// calls. It is passed to TLI::LowerCallTo when the SelectionDAG builder
/// needs to lower a call, and targets will see this struct in their
LowerCall
@@ -4511,6 +4522,8 @@ class TargetLowering : public TargetLoweringBase {
const ConstantInt *CFIType = nullptr;
SDValue ConvergenceControlToken;
+ std::optional<PtrAuthInfo> PAI;
+
CallLoweringInfo(SelectionDAG &DAG)
: RetSExt(false), RetZExt(false), IsVarArg(false), IsInReg(false),
DoesNotReturn(false), IsReturnValueUsed(true), IsConvergent(false),
@@ -4633,6 +4646,11 @@ class TargetLowering : public TargetLoweringBase {
return *this;
}
+ CallLoweringInfo &setPtrAuth(PtrAuthInfo Value) {
+ PAI = Value;
+ return *this;
+ }
+
CallLoweringInfo &setIsPostTypeLegalization(bool Value=true) {
IsPostTypeLegalization = Value;
return *this;
diff --git a/llvm/lib/CodeGen/GlobalISel/CallLowering.cpp
b/llvm/lib/CodeGen/GlobalISel/CallLowering.cpp
index 363fad53b76c3..740a00d8afdd4 100644
--- a/llvm/lib/CodeGen/GlobalISel/CallLowering.cpp
+++ b/llvm/lib/CodeGen/GlobalISel/CallLowering.cpp
@@ -92,6 +92,7 @@ bool CallLowering::lowerCall(MachineIRBuilder &MIRBuilder,
const CallBase &CB,
ArrayRef<Register> ResRegs,
ArrayRef<ArrayRef<Register>> ArgRegs,
Register SwiftErrorVReg,
+ std::optional<PointerAuthInfo> PAI,
Register ConvergenceCtrlToken,
std::function<unsigned()> GetCalleeReg) const {
CallLoweringInfo Info;
@@ -188,6 +189,7 @@ bool CallLowering::lowerCall(MachineIRBuilder &MIRBuilder,
const CallBase &CB,
Info.KnownCallees = CB.getMetadata(LLVMContext::MD_callees);
Info.CallConv = CallConv;
Info.SwiftErrorVReg = SwiftErrorVReg;
+ Info.PAI = PAI;
Info.ConvergenceCtrlToken = ConvergenceCtrlToken;
Info.IsMustTailCall = CB.isMustTailCall();
Info.IsTailCall = CanBeTailCalled;
diff --git a/llvm/lib/CodeGen/GlobalISel/IRTranslator.cpp
b/llvm/lib/CodeGen/GlobalISel/IRTranslator.cpp
index 77ee5e645288b..299f16dbddf12 100644
--- a/llvm/lib/CodeGen/GlobalISel/IRTranslator.cpp
+++ b/llvm/lib/CodeGen/GlobalISel/IRTranslator.cpp
@@ -2642,6 +2642,20 @@ bool IRTranslator::translateCallBase(const CallBase &CB,
}
}
+ std::optional<CallLowering::PointerAuthInfo> PAI;
+ if (CB.countOperandBundlesOfType(LLVMContext::OB_ptrauth)) {
+ // Functions should never be ptrauth-called directly.
+ assert(!CB.getCalledFunction() && "invalid direct ptrauth call");
+
+ auto PAB = CB.getOperandBundle("ptrauth");
+ Value *Key = PAB->Inputs[0];
+ Value *Discriminator = PAB->Inputs[1];
+
+ Register DiscReg = getOrCreateVReg(*Discriminator);
+ PAI = CallLowering::PointerAuthInfo{DiscReg,
+
cast<ConstantInt>(Key)->getZExtValue()};
+ }
+
Register ConvergenceCtrlToken = 0;
if (auto Bundle = CB.getOperandBundle(LLVMContext::OB_convergencectrl)) {
const auto &Token = *Bundle->Inputs[0].get();
@@ -2652,7 +2666,7 @@ bool IRTranslator::translateCallBase(const CallBase &CB,
// optimize into tail calls. Instead, we defer that to selection where a
final
// scan is done to check if any instructions are calls.
bool Success = CLI->lowerCall(
- MIRBuilder, CB, Res, Args, SwiftErrorVReg, ConvergenceCtrlToken,
+ MIRBuilder, CB, Res, Args, SwiftErrorVReg, PAI, ConvergenceCtrlToken,
[&]() { return getOrCreateVReg(*CB.getCalledOperand()); });
// Check if we just inserted a tail call.
diff --git a/llvm/lib/CodeGen/SelectionDAG/SelectionDAGBuilder.cpp
b/llvm/lib/CodeGen/SelectionDAG/SelectionDAGBuilder.cpp
index f47aea29625f6..1de98e5559ee8 100644
--- a/llvm/lib/CodeGen/SelectionDAG/SelectionDAGBuilder.cpp
+++ b/llvm/lib/CodeGen/SelectionDAG/SelectionDAGBuilder.cpp
@@ -3307,12 +3307,12 @@ void SelectionDAGBuilder::visitInvoke(const InvokeInst
&I) {
const BasicBlock *EHPadBB = I.getSuccessor(1);
MachineBasicBlock *EHPadMBB = FuncInfo.MBBMap[EHPadBB];
- // Deopt bundles are lowered in LowerCallSiteWithDeoptBundle, and we don't
+ // Deopt and ptrauth bundles are lowered in helper functions, and we don't
// have to do anything here to lower funclet bundles.
assert(!I.hasOperandBundlesOtherThan(
{LLVMContext::OB_deopt, LLVMContext::OB_gc_transition,
LLVMContext::OB_gc_live, LLVMContext::OB_funclet,
- LLVMContext::OB_cfguardtarget,
+ LLVMContext::OB_cfguardtarget, LLVMContext::OB_ptrauth,
LLVMContext::OB_clang_arc_attachedcall}) &&
"Cannot lower invokes with arbitrary operand bundles yet!");
@@ -3363,6 +3363,8 @@ void SelectionDAGBuilder::visitInvoke(const InvokeInst
&I) {
// intrinsic, and right now there are no plans to support other intrinsics
// with deopt state.
LowerCallSiteWithDeoptBundle(&I, getValue(Callee), EHPadBB);
+ } else if (I.countOperandBundlesOfType(LLVMContext::OB_ptrauth)) {
+ LowerCallSiteWithPtrAuthBundle(cast<CallBase>(I), EHPadBB);
} else {
LowerCallTo(I, getValue(Callee), false, false, EHPadBB);
}
@@ -8531,9 +8533,9 @@
SelectionDAGBuilder::lowerInvokable(TargetLowering::CallLoweringInfo &CLI,
}
void SelectionDAGBuilder::LowerCallTo(const CallBase &CB, SDValue Callee,
- bool isTailCall,
- bool isMustTailCall,
- const BasicBlock *EHPadBB) {
+ bool isTailCall, bool isMustTailCall,
+ const BasicBlock *EHPadBB,
+ const TargetLowering::PtrAuthInfo *PAI) {
auto &DL = DAG.getDataLayout();
FunctionType *FTy = CB.getFunctionType();
Type *RetTy = CB.getType();
@@ -8640,6 +8642,15 @@ void SelectionDAGBuilder::LowerCallTo(const CallBase
&CB, SDValue Callee,
CB.countOperandBundlesOfType(LLVMContext::OB_preallocated) != 0)
.setCFIType(CFIType)
.setConvergenceControlToken(ConvControlToken);
+
+ // Set the pointer authentication info if we have it.
+ if (PAI) {
+ if (!TLI.supportPtrAuthBundles())
+ report_fatal_error(
+ "This target doesn't support calls with ptrauth operand bundles.");
+ CLI.setPtrAuth(*PAI);
+ }
+
std::pair<SDValue, SDValue> Result = lowerInvokable(CLI, EHPadBB);
if (Result.first.getNode()) {
@@ -9185,6 +9196,11 @@ void SelectionDAGBuilder::visitCall(const CallInst &I) {
}
}
+ if (I.countOperandBundlesOfType(LLVMContext::OB_ptrauth)) {
+ LowerCallSiteWithPtrAuthBundle(cast<CallBase>(I), /*EHPadBB=*/nullptr);
+ return;
+ }
+
// Deopt bundles are lowered in LowerCallSiteWithDeoptBundle, and we don't
// have to do anything here to lower funclet bundles.
// CFGuardTarget bundles are lowered in LowerCallTo.
@@ -9206,6 +9222,31 @@ void SelectionDAGBuilder::visitCall(const CallInst &I) {
LowerCallTo(I, Callee, I.isTailCall(), I.isMustTailCall());
}
+void SelectionDAGBuilder::LowerCallSiteWithPtrAuthBundle(
+ const CallBase &CB, const BasicBlock *EHPadBB) {
+ auto PAB = CB.getOperandBundle("ptrauth");
+ auto *CalleeV = CB.getCalledOperand();
+
+ // Gather the call ptrauth data from the operand bundle:
+ // [ i32 <key>, i64 <discriminator> ]
+ auto *Key = cast<ConstantInt>(PAB->Inputs[0]);
+ Value *Discriminator = PAB->Inputs[1];
+
+ assert(Key->getType()->isIntegerTy(32) && "Invalid ptrauth key");
+ assert(Discriminator->getType()->isIntegerTy(64) &&
+ "Invalid ptrauth discriminator");
+
+ // Functions should never be ptrauth-called directly.
+ assert(!isa<Function>(CalleeV) && "invalid direct ptrauth call");
+
+ // Otherwise, do an authenticated indirect call.
+ TargetLowering::PtrAuthInfo PAI = {Key->getZExtValue(),
+ getValue(Discriminator)};
+
+ LowerCallTo(CB, getValue(CalleeV), CB.isTailCall(), CB.isMustTailCall(),
+ EHPadBB, &PAI);
+}
+
namespace {
/// AsmOperandInfo - This contains information for each constraint that we are
diff --git a/llvm/lib/CodeGen/SelectionDAG/SelectionDAGBuilder.h
b/llvm/lib/CodeGen/SelectionDAG/SelectionDAGBuilder.h
index 211e1653de560..c6aa4f1c5c3d8 100644
--- a/llvm/lib/CodeGen/SelectionDAG/SelectionDAGBuilder.h
+++ b/llvm/lib/CodeGen/SelectionDAG/SelectionDAGBuilder.h
@@ -406,7 +406,8 @@ class SelectionDAGBuilder {
void CopyToExportRegsIfNeeded(const Value *V);
void ExportFromCurrentBlock(const Value *V);
void LowerCallTo(const CallBase &CB, SDValue Callee, bool IsTailCall,
- bool IsMustTailCall, const BasicBlock *EHPadBB = nullptr);
+ bool IsMustTailCall, const BasicBlock *EHPadBB = nullptr,
+ const TargetLowering::PtrAuthInfo *PAI = nullptr);
// Lower range metadata from 0 to N to assert zext to an integer of nearest
// floor power of two.
@@ -490,6 +491,9 @@ class SelectionDAGBuilder {
bool VarArgDisallowed,
bool ForceVoidReturnTy);
+ void LowerCallSiteWithPtrAuthBundle(const CallBase &CB,
+ const BasicBlock *EHPadBB);
+
/// Returns the type of FrameIndex and TargetFrameIndex nodes.
MVT getFrameIndexTy() {
return DAG.getTargetLoweringInfo().getFrameIndexTy(DAG.getDataLayout());
diff --git a/llvm/lib/Target/AArch64/AArch64AsmPrinter.cpp
b/llvm/lib/Target/AArch64/AArch64AsmPrinter.cpp
index b7ad5fb5eb91c..7d663e5f9d96d 100644
--- a/llvm/lib/Target/AArch64/AArch64AsmPrinter.cpp
+++ b/llvm/lib/Target/AArch64/AArch64AsmPrinter.cpp
@@ -134,6 +134,8 @@ class AArch64AsmPrinter : public AsmPrinter {
void emitSled(const MachineInstr &MI, SledKind Kind);
+ // Emit the sequence for BLRA (authenticate + branch).
+ void emitPtrauthBranch(const MachineInstr *MI);
// Emit the sequence for AUT or AUTPAC.
void emitPtrauthAuthResign(const MachineInstr *MI);
// Emit the sequence to compute a discriminator into x17, or reuse AddrDisc.
@@ -1522,6 +1524,10 @@ void AArch64AsmPrinter::emitFMov0(const MachineInstr
&MI) {
unsigned AArch64AsmPrinter::emitPtrauthDiscriminator(uint16_t Disc,
unsigned AddrDisc,
unsigned &InstsEmitted) {
+ // So far we've used NoRegister in pseudos. Now we need real encodings.
+ if (AddrDisc == AArch64::NoRegister)
+ AddrDisc = AArch64::XZR;
+
// If there is no constant discriminator, there's no blend involved:
// just use the address discriminator register as-is (XZR or not).
if (!Disc)
@@ -1769,6 +1775,39 @@ void AArch64AsmPrinter::emitPtrauthAuthResign(const
MachineInstr *MI) {
OutStreamer->emitLabel(EndSym);
}
+void AArch64AsmPrinter::emitPtrauthBranch(const MachineInstr *MI) {
+ unsigned InstsEmitted = 0;
+
+ unsigned BrTarget = MI->getOperand(0).getReg();
+ auto Key = (AArch64PACKey::ID)MI->getOperand(1).getImm();
+ uint64_t Disc = MI->getOperand(2).getImm();
+ unsigned AddrDisc = MI->getOperand(3).getReg();
+
+ // Compute discriminator into x17
+ assert(isUInt<16>(Disc));
+ unsigned DiscReg = emitPtrauthDiscriminator(Disc, AddrDisc, InstsEmitted);
+ bool IsZeroDisc = DiscReg == AArch64::XZR;
+
+ assert((Key == AArch64PACKey::IA || Key == AArch64PACKey::IB) &&
+ "Invalid auth call key");
+
+ unsigned Opc;
+ if (Key == AArch64PACKey::IA)
+ Opc = IsZeroDisc ? AArch64::BLRAAZ : AArch64::BLRAA;
+ else
+ Opc = IsZeroDisc ? AArch64::BLRABZ : AArch64::BLRAB;
+
+ MCInst BRInst;
+ BRInst.setOpcode(Opc);
+ BRInst.addOperand(MCOperand::createReg(BrTarget));
+ if (!IsZeroDisc)
+ BRInst.addOperand(MCOperand::createReg(DiscReg));
+ EmitToStreamer(*OutStreamer, BRInst);
+ ++InstsEmitted;
+
+ assert(STI->getInstrInfo()->getInstSizeInBytes(*MI) >= InstsEmitted * 4);
+}
+
// Simple pseudo-instructions have their lowering (with expansion to real
// instructions) auto-generated.
#include "AArch64GenMCPseudoLowering.inc"
@@ -1909,9 +1948,60 @@ void AArch64AsmPrinter::emitInstruction(const
MachineInstr *MI) {
emitPtrauthAuthResign(MI);
return;
+ case AArch64::BLRA:
+ emitPtrauthBranch(MI);
+ return;
+
// Tail calls use pseudo instructions so they have the proper code-gen
// attributes (isCall, isReturn, etc.). We lower them to the real
// instruction here.
+ case AArch64::AUTH_TCRETURN:
+ case AArch64::AUTH_TCRETURN_BTI: {
+ const uint64_t Key = MI->getOperand(2).getImm();
+ assert(Key < 2 && "Unknown key kind for authenticating tail-call return");
+ const uint64_t Disc = MI->getOperand(3).getImm();
+ Register AddrDisc = MI->getOperand(4).getReg();
+
+ Register ScratchReg = MI->getOperand(0).getReg() == AArch64::X16
+ ? AArch64::X17
+ : AArch64::X16;
+
+ unsigned DiscReg = AddrDisc;
+ if (Disc) {
+ assert(isUInt<16>(Disc) && "Integer discriminator is too wide");
+
+ if (AddrDisc != AArch64::NoRegister) {
+ EmitToStreamer(*OutStreamer, MCInstBuilder(AArch64::ORRXrs)
+ .addReg(ScratchReg)
+ .addReg(AArch64::XZR)
+ .addReg(AddrDisc)
+ .addImm(0));
+ EmitToStreamer(*OutStreamer, MCInstBuilder(AArch64::MOVKXi)
+ .addReg(ScratchReg)
+ .addReg(ScratchReg)
+ .addImm(Disc)
+ .addImm(/*shift=*/48));
+ } else {
+ EmitToStreamer(*OutStreamer, MCInstBuilder(AArch64::MOVZXi)
+ .addReg(ScratchReg)
+ .addImm(Disc)
+ .addImm(/*shift=*/0));
+ }
+ DiscReg = ScratchReg;
+ }
+
+ const bool isZero = DiscReg == AArch64::NoRegister;
+ const unsigned Opcodes[2][2] = {{AArch64::BRAA, AArch64::BRAAZ},
+ {AArch64::BRAB, AArch64::BRABZ}};
+
+ MCInst TmpInst;
+ TmpInst.setOpcode(Opcodes[Key][isZero]);
+ TmpInst.addOperand(MCOperand::createReg(MI->getOperand(0).getReg()));
+ if (!isZero)
+ TmpInst.addOperand(MCOperand::createReg(DiscReg));
+ EmitToStreamer(*OutStreamer, TmpInst);
+ return;
+ }
case AArch64::TCRETURNri:
case AArch64::TCRETURNrix16x17:
case AArch64::TCRETURNrix17:
diff --git a/llvm/lib/Target/AArch64/AArch64ExpandPseudoInsts.cpp
b/llvm/lib/Target/AArch64/AArch64ExpandPseudoInsts.cpp
index 03f0778bae59d..657324d2307c5 100644
--- a/llvm/lib/Target/AArch64/AArch64ExpandPseudoInsts.cpp
+++ b/llvm/lib/Target/AArch64/AArch64ExpandPseudoInsts.cpp
@@ -817,10 +817,44 @@ bool AArch64ExpandPseudo::expandCALL_RVMARKER(
MachineInstr &MI = *MBBI;
MachineOperand &RVTarget = MI.getOperand(0);
assert(RVTarget.isGlobal() && "invalid operand for attached call");
- MachineInstr *OriginalCall =
- createCall(MBB, MBBI, TII, MI.getOperand(1),
- // Regmask starts after the RV and call targets.
- /*RegMaskStartIdx=*/2);
+
+ MachineInstr *OriginalCall = nullptr;
+
+ if (MI.getOpcode() == AArch64::BLRA_RVMARKER) {
+ // Pointer auth call.
+ MachineOperand &Key = MI.getOperand(2);
+ assert((Key.getImm() == 0 || Key.getImm() == 1) &&
+ "invalid key for ptrauth call");
+ MachineOperand &IntDisc = MI.getOperand(3);
+ MachineOperand &AddrDisc = MI.getOperand(4);
+
+ OriginalCall = BuildMI(MBB, MBBI, MI.getDebugLoc(),
TII->get(AArch64::BLRA))
+ .getInstr();
+ OriginalCall->addOperand(MI.getOperand(1));
+ OriginalCall->addOperand(Key);
+ OriginalCall->addOperand(IntDisc);
+ OriginalCall->addOperand(AddrDisc);
+
+ unsigned RegMaskStartIdx = 5;
+ // Skip register arguments. Those are added during ISel, but are not
+ // needed for the concrete branch.
+ while (!MI.getOperand(RegMaskStartIdx).isRegMask()) {
+ auto MOP = MI.getOperand(RegMaskStartIdx);
+ assert(MOP.isReg() && "can only add register operands");
+ OriginalCall->addOperand(MachineOperand::CreateReg(
+ MOP.getReg(), /*Def=*/false, /*Implicit=*/true, /*isKill=*/false,
+ /*isDead=*/false, /*isUndef=*/MOP.isUndef()));
+ RegMaskStartIdx++;
+ }
+ for (const MachineOperand &MO :
+ llvm::drop_begin(MI.operands(), RegMaskStartIdx))
+ OriginalCall->addOperand(MO);
+ } else {
+ assert(MI.getOpcode() == AArch64::BLR_RVMARKER && "unknown rvmarker MI");
+ OriginalCall = createCall(MBB, MBBI, TII, MI.getOperand(1),
+ // Regmask starts after the RV and call targets.
+ /*RegMaskStartIdx=*/2);
+ }
BuildMI(MBB, MBBI, MI.getDebugLoc(), TII->get(AArch64::ORRXrs))
.addReg(AArch64::FP, RegState::Define)
@@ -1529,6 +1563,7 @@ bool AArch64ExpandPseudo::expandMI(MachineBasicBlock &MBB,
case AArch64::LDR_PPXI:
return expandSVESpillFill(MBB, MBBI, AArch64::LDR_PXI, 2);
case AArch64::BLR_RVMARKER:
+ case AArch64::BLRA_RVMARKER:
return expandCALL_RVMARKER(MBB, MBBI);
case AArch64::BLR_BTI:
return expandCALL_BTI(MBB, MBBI);
diff --git a/llvm/lib/Target/AArch64/AArch64ISelLowering.cpp
b/llvm/lib/Target/AArch64/AArch64ISelLowering.cpp
index c1ca78af5cda8..c5f08e8b1817a 100644
--- a/llvm/lib/Target/AArch64/AArch64ISelLowering.cpp
+++ b/llvm/lib/Target/AArch64/AArch64ISelLowering.cpp
@@ -329,6 +329,40 @@ static bool isZeroingInactiveLanes(SDValue Op) {
}
}
+static std::tuple<SDValue, SDValue>
+extractPtrauthBlendDiscriminators(SDValue Disc, SelectionDAG *DAG) {
+ SDLoc DL(Disc);
+ SDValue AddrDisc;
+ SDValue ConstDisc;
+
+ // If this is a blend, remember the constant and address discriminators.
+ // Otherwise, it's either a constant discriminator, or a non-blended
+ // address discriminator.
+ if (Disc->getOpcode() == ISD::INTRINSIC_WO_CHAIN &&
+ Disc->getConstantOperandVal(0) == Intrinsic::ptrauth_blend) {
+ AddrDisc = Disc->getOperand(1);
+ ConstDisc = Disc->getOperand(2);
+ } else {
+ ConstDisc = Disc;
+ }
+
+ // If the constant discriminator (either the blend RHS, or the entire
+ // discriminator value) isn't a 16-bit constant, bail out, and let the
+ // discriminator be computed separately.
+ auto *ConstDiscN = dyn_cast<ConstantSDNode>(ConstDisc);
+ if (!ConstDiscN || !isUInt<16>(ConstDiscN->getZExtValue()))
+ return std::make_tuple(DAG->getTargetConstant(0, DL, MVT::i64), Disc);
+
+ // If there's no address discriminator, use NoRegister, which we'll later
+ // replace with XZR, or directly use a Z variant of the inst. when available.
+ if (!AddrDisc)
+ AddrDisc = DAG->getRegister(AArch64::NoRegister, MVT::i64);
+
+ return std::make_tuple(
+ DAG->getTargetConstant(ConstDiscN->getZExtValue(), DL, MVT::i64),
+ AddrDisc);
+}
+
AArch64TargetLowering::AArch64TargetLowering(const TargetMachine &TM,
const AArch64Subtarget &STI)
: TargetLowering(TM), Subtarget(&STI) {
@@ -2410,6 +2444,9 @@ const char
*AArch64TargetLowering::getTargetNodeName(unsigned Opcode) const {
MAKE_CASE(AArch64ISD::ADRP)
MAKE_CASE(AArch64ISD::ADR)
MAKE_CASE(AArch64ISD::ADDlow)
+ MAKE_CASE(AArch64ISD::AUTH_CALL)
+ MAKE_CASE(AArch64ISD::AUTH_TC_RETURN)
+ MAKE_CASE(AArch64ISD::AUTH_CALL_RVMARKER)
MAKE_CASE(AArch64ISD::LOADgot)
MAKE_CASE(AArch64ISD::RET_GLUE)
MAKE_CASE(AArch64ISD::BRCOND)
@@ -8410,10 +8447,30 @@ AArch64TargetLowering::LowerCall(CallLoweringInfo &CLI,
InGlue = Chain.getValue(1);
}
+ unsigned Opc = IsTailCall ? AArch64ISD::TC_RETURN : AArch64ISD::CALL;
+
std::vector<SDValue> Ops;
Ops.push_back(Chain);
Ops.push_back(Callee);
+ // Calls with operand bundle "clang.arc.attachedcall" are special. They
should
+ // be expanded to the call, directly followed by a special marker sequence
and
+ // a call to an ObjC library function. Use CALL_RVMARKER to do that.
+ if (CLI.CB && objcarc::hasAttachedCallOpBundle(CLI.CB)) {
+ assert(!IsTailCall &&
+ "tail calls cannot be marked with clang.arc.attachedcall");
+ Opc = AArch64ISD::CALL_RVMARKER;
+
+ // Add a target global address for the retainRV/claimRV runtime function
+ // just before the call target.
+ Function *ARCFn = *objcarc::getAttachedARCFunction(CLI.CB);
+ auto GA = DAG.getTargetGlobalAddress(ARCFn, DL, PtrVT);
+ Ops.insert(Ops.begin() + 1, GA);
+ } else if (CallConv == CallingConv::ARM64EC_Thunk_X64) {
+ Opc = AArch64ISD::CALL_ARM64EC_TO_X64;
+ } else if (GuardWithBTI)
+ Opc = AArch64ISD::CALL_BTI;
+
if (IsTailCall) {
// Each tail call may have to adjust the stack by a different amount, so
// this information must travel along with the operation for eventual
@@ -8421,6 +8478,26 @@ AArch64TargetLowering::LowerCall(CallLoweringInfo &CLI,
Ops.push_back(DAG.getTargetConstant(FPDiff, DL, MVT::i32));
}
+ if (CLI.PAI) {
+ const uint64_t Key = CLI.PAI->Key;
+ // Authenticated calls only support IA and IB.
+ if (Key > 1)
+ report_fatal_error("Unsupported key kind for authenticating call");
+
+ // Split the discriminator into address/integer components.
+ SDValue AddrDisc, IntDisc;
+ std::tie(IntDisc, AddrDisc) =
+ extractPtrauthBlendDiscriminators(CLI.PAI->Discriminator, &DAG);
+
+ if (Opc == AArch64ISD::CALL_RVMARKER)
+ Opc = AArch64ISD::AUTH_CALL_RVMARKER;
+ else
+ Opc = IsTailCall ? AArch64ISD::AUTH_TC_RETURN : AArch64ISD::AUTH_CALL;
+ Ops.push_back(DAG.getTargetConstant(Key, DL, MVT::i32));
+ Ops.push_back(IntDisc);
+ Ops.push_back(AddrDisc);
+ }
+
// Add argument registers to the end of the list so that they are known live
// into the call.
for (auto &RegToPass : RegsToPass)
@@ -8458,8 +8535,7 @@ AArch64TargetLowering::LowerCall(CallLoweringInfo &CLI,
// actual call instruction.
if (IsTailCall) {
MF.getFrameInfo().setHasTailCall();
- SDValue Ret = DAG.getNode(AArch64ISD::TC_RETURN, DL, NodeTys, Ops);
-
+ SDValue Ret = DAG.getNode(Opc, DL, NodeTys, Ops);
if (IsCFICall)
Ret.getNode()->setCFIType(CLI.CFIType->getZExtValue());
@@ -8468,29 +8544,8 @@ AArch64TargetLowering::LowerCall(CallLoweringInfo &CLI,
return Ret;
}
- unsigned CallOpc = AArch64ISD::CALL;
- // Calls with operand bundle "clang.arc.attachedcall" are special. They
should
- // be expanded to the call, directly followed by a special marker sequence
and
- // a call to an ObjC library function. Use CALL_RVMARKER to do that.
- if (CLI.CB && objcarc::hasAttachedCallOpBundle(CLI.CB)) {
- assert(!IsTailCall &&
- "tail calls cannot be marked with clang.arc.attachedcall");
- CallOpc = AArch64ISD::CALL_RVMARKER;
-
- // Add a target global address for the retainRV/claimRV runtime function
- // just before the call target.
- Function *ARCFn = *objcarc::getAttachedARCFunction(CLI.CB);
- auto GA = DAG.getTargetGlobalAddress(ARCFn, DL, PtrVT);
- Ops.insert(Ops.begin() + 1, GA);
- } else if (CallConv == CallingConv::ARM64EC_Thunk_X64) {
- CallOpc = AArch64ISD::CALL_ARM64EC_TO_X64;
- } else if (GuardWithBTI) {
- CallOpc = AArch64ISD::CALL_BTI;
- }
-
// Returns a chain and a flag for retval copy to use.
- Chain = DAG.getNode(CallOpc, DL, NodeTys, Ops);
-
+ Chain = DAG.getNode(Opc, DL, NodeTys, Ops);
if (IsCFICall)
Chain.getNode()->setCFIType(CLI.CFIType->getZExtValue());
diff --git a/llvm/lib/Target/AArch64/AArch64ISelLowering.h
b/llvm/lib/Target/AArch64/AArch64ISelLowering.h
index fbdc4de5617fe..5297a5d12ec13 100644
--- a/llvm/lib/Target/AArch64/AArch64ISelLowering.h
+++ b/llvm/lib/Target/AArch64/AArch64ISelLowering.h
@@ -58,6 +58,16 @@ enum NodeType : unsigned {
CALL_BTI, // Function call followed by a BTI instruction.
+ // Function call, authenticating the callee value first:
+ // AUTH_CALL chain, callee, auth key #, int disc, addr disc, operands.
+ AUTH_CALL,
+ // AUTH_TC_RETURN chain, callee, fpdiff, auth key #, int disc, addr disc,
+ // operands.
+ AUTH_TC_RETURN,
+
+ // Authenticated variant of CALL_RVMARKER.
+ AUTH_CALL_RVMARKER,
+
COALESCER_BARRIER,
SMSTART,
@@ -911,6 +921,8 @@ class AArch64TargetLowering : public TargetLowering {
return true;
}
+ bool supportPtrAuthBundles() const override { return true; }
+
bool supportKCFIBundles() const override { return true; }
MachineInstr *EmitKCFICheck(MachineBasicBlock &MBB,
diff --git a/llvm/lib/Target/AArch64/AArch64InstrInfo.cpp
b/llvm/lib/Target/AArch64/AArch64InstrInfo.cpp
index 55fecc4b4845f..72e35f9442031 100644
--- a/llvm/lib/Target/AArch64/AArch64InstrInfo.cpp
+++ b/llvm/lib/Target/AArch64/AArch64InstrInfo.cpp
@@ -2511,6 +2511,8 @@ bool AArch64InstrInfo::isTailCallReturnInst(const
MachineInstr &MI) {
case AArch64::TCRETURNrix17:
case AArch64::TCRETURNrinotx16:
case AArch64::TCRETURNriALL:
+ case AArch64::AUTH_TCRETURN:
+ case AArch64::AUTH_TCRETURN_BTI:
return true;
}
}
diff --git a/llvm/lib/Target/AArch64/AArch64InstrInfo.td
b/llvm/lib/Target/AArch64/AArch64InstrInfo.td
index a89bd47a06279..a7a5fdc91fa89 100644
--- a/llvm/lib/Target/AArch64/AArch64InstrInfo.td
+++ b/llvm/lib/Target/AArch64/AArch64InstrInfo.td
@@ -1566,6 +1566,30 @@ let Predicates = [HasComplxNum, HasNEON] in {
(v4f32 (bitconvert (v2i64 (AArch64duplane64 (v2i64
V128:$Rm), VectorIndexD:$idx))))>;
}
+def AArch64authcall : SDNode<"AArch64ISD::AUTH_CALL",
+ SDTypeProfile<0, -1, [SDTCisPtrTy<0>,
+ SDTCisVT<1, i32>,
+ SDTCisVT<2, i64>,
+ SDTCisVT<3, i64>]>,
+ [SDNPHasChain, SDNPOptInGlue, SDNPOutGlue,
+ SDNPVariadic]>;
+
+def AArch64authtcret: SDNode<"AArch64ISD::AUTH_TC_RETURN",
+ SDTypeProfile<0, 5, [SDTCisPtrTy<0>,
+ SDTCisVT<2, i32>,
+ SDTCisVT<3, i64>,
+ SDTCisVT<4, i64>]>,
+ [SDNPHasChain, SDNPOptInGlue, SDNPVariadic]>;
+
+def AArch64authcall_rvmarker : SDNode<"AArch64ISD::AUTH_CALL_RVMARKER",
+ SDTypeProfile<0, -1, [SDTCisPtrTy<0>,
+ SDTCisPtrTy<1>,
+ SDTCisVT<2, i32>,
+ SDTCisVT<3, i64>,
+ SDTCisVT<4, i64>]>,
+ [SDNPHasChain, SDNPOptInGlue, SDNPOutGlue,
+ SDNPVariadic]>;
+
// v8.3a Pointer Authentication
// These instructions inhabit part of the hint space and so can be used for
// armv8 targets. Keeping the old HINT mnemonic when compiling without PA is
@@ -1694,6 +1718,35 @@ let Predicates = [HasPAuth] in {
def BLRABZ : AuthOneOperand<0b001, 1, "blrabz">;
}
+ // BLRA pseudo, generalized version of BLRAA/BLRAB/Z.
+ // This directly manipulates x16/x17, which are the only registers the OS
+ // guarantees are safe to use for sensitive operations.
+ def BLRA : Pseudo<(outs), (ins GPR64noip:$Rn, i32imm:$Key, i64imm:$Disc,
+ GPR64noip:$AddrDisc),
+ [(AArch64authcall GPR64noip:$Rn, timm:$Key, timm:$Disc,
+ GPR64noip:$AddrDisc)]>, Sched<[]> {
+ let isCodeGenOnly = 1;
+ let hasSideEffects = 1;
+ let mayStore = 0;
+ let mayLoad = 0;
+ let isCall = 1;
+ let Size = 12; // 4 fixed + 8 variable, to compute discriminator.
+ let Defs = [X17,LR];
+ let Uses = [SP];
+ }
+
+ def BLRA_RVMARKER : Pseudo<
+ (outs), (ins i64imm:$rvfunc, GPR64noip:$Rn, i32imm:$Key, i64imm:$Disc,
+ GPR64noip:$AddrDisc),
+ [(AArch64authcall_rvmarker tglobaladdr:$rvfunc,
+ GPR64noip:$Rn, timm:$Key, timm:$Disc,
+ GPR64noip:$AddrDisc)]>, Sched<[]> {
+ let isCodeGenOnly = 1;
+ let isCall = 1;
+ let Defs = [X17,LR];
+ let Uses = [SP];
+ }
+
let isReturn = 1, isTerminator = 1, isBarrier = 1 in {
def RETAA : AuthReturn<0b010, 0, "retaa">;
def RETAB : AuthReturn<0b010, 1, "retab">;
@@ -1734,6 +1787,33 @@ let Predicates = [HasPAuth] in {
let Defs = [X16,X17,NZCV];
let Uses = [X16];
}
+
+ // Size 16: 4 fixed + 8 variable, to compute discriminator.
+ let isCall = 1, isTerminator = 1, isReturn = 1, isBarrier = 1, Size = 16,
+ Uses = [SP] in {
+ def AUTH_TCRETURN
+ : Pseudo<(outs), (ins tcGPR64:$dst, i32imm:$FPDiff, i32imm:$Key,
+ i64imm:$Disc, tcGPR64:$AddrDisc),
+ []>, Sched<[WriteBrReg]>;
+ def AUTH_TCRETURN_BTI
+ : Pseudo<(outs), (ins tcGPRx16x17:$dst, i32imm:$FPDiff, i32imm:$Key,
+ i64imm:$Disc, tcGPR64:$AddrDisc),
+ []>, Sched<[WriteBrReg]>;
+ }
+
+ let Predicates = [TailCallAny] in
+ def : Pat<(AArch64authtcret tcGPR64:$dst, (i32 timm:$FPDiff), (i32
timm:$Key),
+ (i64 timm:$Disc), tcGPR64:$AddrDisc),
+ (AUTH_TCRETURN tcGPR64:$dst, imm:$FPDiff, imm:$Key, imm:$Disc,
+ tcGPR64:$AddrDisc)>;
+
+ let Predicates = [TailCallX16X17] in
+ def : Pat<(AArch64authtcret tcGPRx16x17:$dst, (i32 timm:$FPDiff),
+ (i32 timm:$Key), (i64 timm:$Disc),
+ tcGPR64:$AddrDisc),
+ (AUTH_TCRETURN_BTI tcGPRx16x17:$dst, imm:$FPDiff, imm:$Key,
+ imm:$Disc, tcGPR64:$AddrDisc)>;
+
}
// v9.5-A pointer authentication extensions
diff --git a/llvm/lib/Target/AArch64/GISel/AArch64CallLowering.cpp
b/llvm/lib/Target/AArch64/GISel/AArch64CallLowering.cpp
index c4197ff73187a..53c35aa835bbc 100644
--- a/llvm/lib/Target/AArch64/GISel/AArch64CallLowering.cpp
+++ b/llvm/lib/Target/AArch64/GISel/AArch64CallLowering.cpp
@@ -13,6 +13,7 @@
//===----------------------------------------------------------------------===//
#include "AArch64CallLowering.h"
+#include "AArch64GlobalISelUtils.h"
#include "AArch64ISelLowering.h"
#include "AArch64MachineFunctionInfo.h"
#include "AArch64RegisterInfo.h"
@@ -50,6 +51,7 @@
#define DEBUG_TYPE "aarch64-call-lowering"
using namespace llvm;
+using namespace AArch64GISelUtils;
AArch64CallLowering::AArch64CallLowering(const AArch64TargetLowering &TLI)
: CallLowering(&TLI) {}
@@ -1012,25 +1014,37 @@ bool
AArch64CallLowering::isEligibleForTailCallOptimization(
}
static unsigned getCallOpcode(const MachineFunction &CallerF, bool IsIndirect,
- bool IsTailCall) {
+ bool IsTailCall,
+ std::optional<CallLowering::PointerAuthInfo>
&PAI,
+ MachineRegisterInfo &MRI) {
const AArch64FunctionInfo *FuncInfo = CallerF.getInfo<AArch64FunctionInfo>();
- if (!IsTailCall)
- return IsIndirect ? getBLRCallOpcode(CallerF) : (unsigned)AArch64::BL;
+ if (!IsTailCall) {
+ if (!PAI)
+ return IsIndirect ? getBLRCallOpcode(CallerF) : (unsigned)AArch64::BL;
+
+ assert(IsIndirect && "authenticated direct call");
+ assert(PAI->Key == 0 || PAI->Key == 1 && "invalid ptrauth key");
+ return AArch64::BLRA;
+ }
if (!IsIndirect)
return AArch64::TCRETURNdi;
- // When BTI or PAuthLR are enabled, there are restrictions on using x16 and
- // x17 to hold the function pointer.
+ // When BTI is enabled, we need to use TCRETURNriBTI to make sure that we use
+ // x16 or x17.
if (FuncInfo->branchTargetEnforcement()) {
- if (FuncInfo->branchProtectionPAuthLR())
+ if (PAI)
+ return AArch64::AUTH_TCRETURN_BTI;
+ else if (FuncInfo->branchProtectionPAuthLR())
return AArch64::TCRETURNrix17;
else
return AArch64::TCRETURNrix16x17;
} else if (FuncInfo->branchProtectionPAuthLR())
return AArch64::TCRETURNrinotx16;
+ if (PAI)
+ return AArch64::AUTH_TCRETURN;
return AArch64::TCRETURNri;
}
@@ -1066,14 +1080,6 @@ bool AArch64CallLowering::lowerTailCall(
Info.CallConv != CallingConv::Tail &&
Info.CallConv != CallingConv::SwiftTail;
- // TODO: Right now, regbankselect doesn't know how to handle the rtcGPR64
- // register class. Until we can do that, we should fall back here.
- if (MF.getInfo<AArch64FunctionInfo>()->branchTargetEnforcement()) {
- LLVM_DEBUG(
- dbgs() << "Cannot lower indirect tail calls with BTI enabled yet.\n");
- return false;
- }
-
// Find out which ABI gets to decide where things go.
CallingConv::ID CalleeCC = Info.CallConv;
CCAssignFn *AssignFnFixed;
@@ -1084,17 +1090,39 @@ bool AArch64CallLowering::lowerTailCall(
if (!IsSibCall)
CallSeqStart = MIRBuilder.buildInstr(AArch64::ADJCALLSTACKDOWN);
- unsigned Opc = getCallOpcode(MF, Info.Callee.isReg(), true);
+ unsigned Opc = getCallOpcode(MF, Info.Callee.isReg(), true, Info.PAI, MRI);
auto MIB = MIRBuilder.buildInstrNoInsert(Opc);
MIB.add(Info.Callee);
+ // Tell the call which registers are clobbered.
+ const AArch64Subtarget &Subtarget = MF.getSubtarget<AArch64Subtarget>();
+ auto TRI = Subtarget.getRegisterInfo();
+
// Byte offset for the tail call. When we are sibcalling, this will always
// be 0.
MIB.addImm(0);
+ // Authenticated tail calls always take key/discriminator arguments.
+ if (Opc == AArch64::AUTH_TCRETURN || Opc == AArch64::AUTH_TCRETURN_BTI) {
+ assert(Info.PAI->Key == 0 || Info.PAI->Key == 1 && "invalid key");
+ MIB.addImm(Info.PAI->Key);
+
+ Register AddrDisc = 0;
+ uint16_t IntDisc = 0;
+ std::tie(IntDisc, AddrDisc) =
+ extractPtrauthBlendDiscriminators(Info.PAI->Discriminator, MRI);
+
+ MIB.addImm(IntDisc);
+ MIB.addUse(AddrDisc);
+ if (AddrDisc != AArch64::NoRegister) {
+ MIB->getOperand(4).setReg(constrainOperandRegClass(
+ MF, *TRI, MRI, *MF.getSubtarget().getInstrInfo(),
+ *MF.getSubtarget().getRegBankInfo(), *MIB, MIB->getDesc(),
+ MIB->getOperand(4), 4));
+ }
+ }
+
// Tell the call which registers are clobbered.
- const AArch64Subtarget &Subtarget = MF.getSubtarget<AArch64Subtarget>();
- auto TRI = Subtarget.getRegisterInfo();
const uint32_t *Mask = TRI->getCallPreservedMask(MF, CalleeCC);
if (Subtarget.hasCustomCallingConv())
TRI->UpdateCustomCallPreservedMask(MF, &Mask);
@@ -1294,7 +1322,7 @@ bool AArch64CallLowering::lowerCall(MachineIRBuilder
&MIRBuilder,
// be expanded to the call, directly followed by a special marker sequence
and
// a call to an ObjC library function.
if (Info.CB && objcarc::hasAttachedCallOpBundle(Info.CB))
- Opc = AArch64::BLR_RVMARKER;
+ Opc = Info.PAI ? AArch64::BLRA_RVMARKER : AArch64::BLR_RVMARKER;
// A call to a returns twice function like setjmp must be followed by a bti
// instruction.
else if (Info.CB && Info.CB->hasFnAttr(Attribute::ReturnsTwice) &&
@@ -1310,13 +1338,13 @@ bool AArch64CallLowering::lowerCall(MachineIRBuilder
&MIRBuilder,
MIB.addExternalSymbol(Info.Callee.getSymbolName(), AArch64II::MO_GOT);
Info.Callee = MachineOperand::CreateReg(MIB.getReg(0), false);
}
- Opc = getCallOpcode(MF, Info.Callee.isReg(), false);
+ Opc = getCallOpcode(MF, Info.Callee.isReg(), false, Info.PAI, MRI);
}
auto MIB = MIRBuilder.buildInstrNoInsert(Opc);
unsigned CalleeOpNo = 0;
- if (Opc == AArch64::BLR_RVMARKER) {
+ if (Opc == AArch64::BLR_RVMARKER || Opc == AArch64::BLRA_RVMARKER) {
// Add a target global address for the retainRV/claimRV runtime function
// just before the call target.
Function *ARCFn = *objcarc::getAttachedARCFunction(Info.CB);
@@ -1342,6 +1370,26 @@ bool AArch64CallLowering::lowerCall(MachineIRBuilder
&MIRBuilder,
Mask = getMaskForArgs(OutArgs, Info, *TRI, MF);
+ if (Opc == AArch64::BLRA || Opc == AArch64::BLRA_RVMARKER) {
+ assert(Info.PAI->Key == 0 || Info.PAI->Key == 1 && "invalid key");
+ MIB.addImm(Info.PAI->Key);
+
+ Register AddrDisc = 0;
+ uint16_t IntDisc = 0;
+ std::tie(IntDisc, AddrDisc) =
+ extractPtrauthBlendDiscriminators(Info.PAI->Discriminator, MRI);
+
+ MIB.addImm(IntDisc);
+ MIB.addUse(AddrDisc);
+ if (AddrDisc != AArch64::NoRegister) {
+ constrainOperandRegClass(MF, *TRI, MRI,
*MF.getSubtarget().getInstrInfo(),
+ *MF.getSubtarget().getRegBankInfo(), *MIB,
+ MIB->getDesc(), MIB->getOperand(CalleeOpNo + 3),
+ CalleeOpNo + 3);
+ }
+ }
+
+ // Tell the call which registers are clobbered.
if (MF.getSubtarget<AArch64Subtarget>().hasCustomCallingConv())
TRI->UpdateCustomCallPreservedMask(MF, &Mask);
MIB.addRegMask(Mask);
diff --git a/llvm/lib/Target/AArch64/GISel/AArch64GlobalISelUtils.cpp
b/llvm/lib/Target/AArch64/GISel/AArch64GlobalISelUtils.cpp
index 0a8ea792d7d7a..4afacd665abf4 100644
--- a/llvm/lib/Target/AArch64/GISel/AArch64GlobalISelUtils.cpp
+++ b/llvm/lib/Target/AArch64/GISel/AArch64GlobalISelUtils.cpp
@@ -105,7 +105,7 @@
AArch64GISelUtils::extractPtrauthBlendDiscriminators(Register Disc,
if (auto ConstDiscVal = getIConstantVRegVal(Disc, MRI)) {
if (isUInt<16>(ConstDiscVal->getZExtValue())) {
ConstDisc = ConstDiscVal->getZExtValue();
- AddrDisc = AArch64::XZR;
+ AddrDisc = AArch64::NoRegister;
}
return std::make_tuple(ConstDisc, AddrDisc);
}
diff --git a/llvm/test/CodeGen/AArch64/GlobalISel/ptrauth-invoke.ll
b/llvm/test/CodeGen/AArch64/GlobalISel/ptrauth-invoke.ll
new file mode 100644
index 0000000000000..bd43776687f2e
--- /dev/null
+++ b/llvm/test/CodeGen/AArch64/GlobalISel/ptrauth-invoke.ll
@@ -0,0 +1,183 @@
+; RUN: llc -mtriple arm64e-apple-darwin -o - -global-isel -global-isel-abort=1
-verify-machineinstrs %s | FileCheck %s --check-prefixes=CHECK
+
+; CHECK-LABEL: _test_invoke_ia_0:
+; CHECK-NEXT: [[FNBEGIN:L.*]]:
+; CHECK-NEXT: .cfi_startproc
+; CHECK-NEXT: .cfi_personality 155, ___gxx_personality_v0
+; CHECK-NEXT: .cfi_lsda 16, [[EXCEPT:Lexception[0-9]+]]
+; CHECK-NEXT: ; %bb.0:
+; CHECK-NEXT: stp x20, x19, [sp, #-32]!
+; CHECK-NEXT: stp x29, x30, [sp, #16]
+; CHECK-NEXT: .cfi_def_cfa_offset 32
+; CHECK-NEXT: .cfi_offset w30, -8
+; CHECK-NEXT: .cfi_offset w29, -16
+; CHECK-NEXT: .cfi_offset w19, -24
+; CHECK-NEXT: .cfi_offset w20, -32
+; CHECK-NEXT: [[PRECALL:L.*]]:
+; CHECK-NEXT: blraaz x0
+; CHECK-NEXT: mov x19, x0
+; CHECK-NEXT: [[POSTCALL:L.*]]:
+; CHECK-NEXT: [[POSTCALL_BB:L.*]]:
+; CHECK-NEXT: bl _foo
+; CHECK-NEXT: mov x0, x19
+; CHECK-NEXT: ldp x29, x30, [sp, #16]
+; CHECK-NEXT: ldp x20, x19, [sp], #32
+; CHECK-NEXT: ret
+; CHECK-NEXT: [[LPADBB:LBB[0-9_]+]]:
+; CHECK-NEXT: [[LPAD:L.*]]:
+; CHECK-NEXT: mov w19, #-1
+; CHECK-NEXT: b [[POSTCALL_BB]]
+
+; CHECK-LABEL: GCC_except_table{{.*}}:
+; CHECK-NEXT: [[EXCEPT]]:
+; CHECK: .uleb128 [[POSTCALL]]-[[PRECALL]] ; Call between [[PRECALL]]
and [[POSTCALL]]
+; CHECK-NEXT: .uleb128 [[LPAD]]-[[FNBEGIN]] ; jumps to [[LPAD]]
+; CHECK-NEXT: .byte 0 ; On action: cleanup
+
+define i32 @test_invoke_ia_0(ptr %arg0) #0 personality ptr
@__gxx_personality_v0 {
+ %tmp0 = invoke i32 %arg0() [ "ptrauth"(i32 0, i64 0) ] to label %continuebb
+ unwind label %unwindbb
+
+unwindbb:
+ %tmp1 = landingpad { ptr, i32 } cleanup
+ call void @foo()
+ ret i32 -1
+
+continuebb:
+ call void @foo()
+ ret i32 %tmp0
+}
+
+@_ZTIPKc = external constant ptr
+@hello_str = private unnamed_addr constant [6 x i8] c"hello\00", align 1
+
+; CHECK-LABEL: _test_invoke_ib_42_catch:
+; CHECK-NEXT: [[FNBEGIN:L.*]]:
+; CHECK-NEXT: .cfi_startproc
+; CHECK-NEXT: .cfi_personality 155, ___gxx_personality_v0
+; CHECK-NEXT: .cfi_lsda 16, [[EXCEPT:Lexception[0-9]+]]
+; CHECK-NEXT: ; %bb.0:
+; CHECK-NEXT: stp x20, x19, [sp, #-32]!
+; CHECK-NEXT: stp x29, x30, [sp, #16]
+; CHECK-NEXT: .cfi_def_cfa_offset 32
+; CHECK-NEXT: .cfi_offset w30, -8
+; CHECK-NEXT: .cfi_offset w29, -16
+; CHECK-NEXT: .cfi_offset w19, -24
+; CHECK-NEXT: .cfi_offset w20, -32
+; CHECK-NEXT: mov x19, x0
+; CHECK-NEXT: mov w0, #8
+; CHECK-NEXT: bl ___cxa_allocate_exception
+; CHECK-NEXT: Lloh{{.*}}:
+; CHECK-NEXT: adrp [[STR_TMP:x[0-9]+]], l_hello_str@PAGE
+; CHECK-NEXT: Lloh{{.*}}:
+; CHECK-NEXT: add [[STR:x[0-9]+]], [[STR_TMP]], l_hello_str@PAGEOFF
+; CHECK-NEXT: str [[STR]], [x0]
+; CHECK-NEXT: [[PRECALL:L.*]]:
+; CHECK-NEXT: Lloh{{.*}}:
+; CHECK-NEXT: adrp x[[ZTI_TMP:[0-9]+]], __ZTIPKc@GOTPAGE
+; CHECK-NEXT: Lloh{{.*}}:
+; CHECK-NEXT: ldr x1, [x[[ZTI_TMP]], __ZTIPKc@GOTPAGEOFF]
+; CHECK-NEXT: mov x2, #0
+; CHECK-NEXT: mov x17, #42
+; CHECK-NEXT: blrab x19, x17
+; CHECK-NEXT: [[POSTCALL:L.*]]:
+; CHECK-NEXT: ; %bb.1:
+; CHECK-NEXT: brk #0x1
+
+; CHECK-NEXT: [[LPADBB:LBB[0-9_]+]]:
+; CHECK-NEXT: [[LPAD:L.*]]:
+; CHECK-NEXT: mov x[[TMP:[0-9]+]], x1
+; CHECK-NEXT: bl ___cxa_begin_catch
+; CHECK-NEXT: cmp w[[TMP]], #2
+
+; CHECK-NEXT: b.ne [[EXITBB:LBB[0-9_]+]]
+; CHECK-NEXT: ; %bb.3:
+; CHECK-NEXT: bl _bar
+; CHECK-NEXT: [[EXITBB]]:
+; CHECK-NEXT: bl _foo
+; CHECK-NEXT: bl ___cxa_end_catch
+; CHECK-NEXT: ldp x29, x30, [sp, #16]
+; CHECK-NEXT: ldp x20, x19, [sp], #32 ; 16-byte Folded Reload
+; CHECK-NEXT: ret
+; CHECK-NEXT: .loh {{.*}}
+; CHECK-NEXT: .loh {{.*}}
+; CHECK-NEXT: [[FNEND:L.*]]:
+
+; CHECK-LABEL: GCC_except_table{{.*}}:
+; CHECK-NEXT: [[EXCEPT]]:
+; CHECK-NEXT: .byte 255 ; @LPStart Encoding =
omit
+; CHECK-NEXT: .byte 155 ; @TType Encoding =
indirect pcrel sdata4
+; CHECK-NEXT: .uleb128 [[TT:L.*]]-[[TTREF:L.*]]
+; CHECK-NEXT: [[TTREF]]:
+; CHECK-NEXT: .byte 1 ; Call site Encoding =
uleb128
+; CHECK-NEXT: .uleb128 [[CSEND:L.*]]-[[CSBEGIN:L.*]]
+; CHECK-NEXT: [[CSBEGIN]]:
+; CHECK-NEXT: .uleb128 [[FNBEGIN]]-[[FNBEGIN]] ; >> Call Site 1 <<
+; CHECK-NEXT: .uleb128 [[PRECALL]]-[[FNBEGIN]] ; Call between
[[FNBEGIN]] and [[PRECALL]]
+; CHECK-NEXT: .byte 0 ; has no landing
pad
+; CHECK-NEXT: .byte 0 ; On action: cleanup
+; CHECK-NEXT: .uleb128 [[PRECALL]]-[[FNBEGIN]] ; >> Call Site 2 <<
+; CHECK-NEXT: .uleb128 [[POSTCALL]]-[[PRECALL]] ; Call between
[[PRECALL]] and [[POSTCALL]]
+; CHECK-NEXT: .uleb128 [[LPAD]]-[[FNBEGIN]] ; jumps to [[LPAD]]
+; CHECK-NEXT: .byte 3 ; On action: 2
+; CHECK-NEXT: .uleb128 [[POSTCALL]]-[[FNBEGIN]] ; >> Call Site 3 <<
+; CHECK-NEXT: .uleb128 [[FNEND]]-[[POSTCALL]] ; Call between
[[POSTCALL]] and [[FNEND]]
+; CHECK-NEXT: .byte 0 ; has no landing
pad
+; CHECK-NEXT: .byte 0 ; On action: cleanup
+; CHECK-NEXT: [[CSEND]]:
+
+; CHECK-NEXT: .byte 1 ; >> Action Record 1 <<
+; CHECK-NEXT: ; Catch TypeInfo 1
+; CHECK-NEXT: .byte 0 ; No further actions
+; CHECK-NEXT: .byte 2 ; >> Action Record 2 <<
+; CHECK-NEXT: ; Catch TypeInfo 2
+; CHECK-NEXT: .byte 125 ; Continue to action 1
+; CHECK-NEXT: .p2align 2
+; CHECK-NEXT: ; >> Catch TypeInfos <<
+; CHECK-NEXT: [[TI:L.*]]: ; TypeInfo 2
+; CHECK-NEXT: .long __ZTIPKc@GOT-[[TI]]
+; CHECK-NEXT: .long 0 ; TypeInfo 1
+
+; CHECK-NEXT: [[TT]]:
+
+define void @test_invoke_ib_42_catch(ptr %fptr) #0 personality ptr
@__gxx_personality_v0 {
+ %tmp0 = call ptr @__cxa_allocate_exception(i64 8)
+ store ptr getelementptr inbounds ([6 x i8], ptr @hello_str, i64 0, i64 0),
ptr %tmp0, align 8
+ invoke void %fptr(ptr %tmp0, ptr @_ZTIPKc, ptr null) [ "ptrauth"(i32 1, i64
42) ]
+ to label %continuebb unwind label %catchbb
+
+catchbb:
+ %tmp2 = landingpad { ptr, i32 }
+ catch ptr @_ZTIPKc
+ catch ptr null
+ %tmp3 = extractvalue { ptr, i32 } %tmp2, 0
+ %tmp4 = extractvalue { ptr, i32 } %tmp2, 1
+ %tmp5 = call i32 @llvm.eh.typeid.for(ptr @_ZTIPKc)
+ %tmp6 = icmp eq i32 %tmp4, %tmp5
+ %tmp7 = call ptr @__cxa_begin_catch(ptr %tmp3)
+ br i1 %tmp6, label %PKc_catchbb, label %any_catchbb
+
+PKc_catchbb:
+ call void @bar(ptr %tmp7)
+ br label %any_catchbb
+
+any_catchbb:
+ call void @foo()
+ call void @__cxa_end_catch()
+ ret void
+
+continuebb:
+ unreachable
+}
+
+declare void @foo()
+declare void @bar(ptr)
+
+declare i32 @__gxx_personality_v0(...)
+declare ptr @__cxa_allocate_exception(i64)
+declare void @__cxa_throw(ptr, ptr, ptr)
+declare i32 @llvm.eh.typeid.for(ptr)
+declare ptr @__cxa_begin_catch(ptr)
+declare void @__cxa_end_catch()
+
+attributes #0 = { nounwind }
diff --git
a/llvm/test/CodeGen/AArch64/branch-target-enforcement-indirect-calls.ll
b/llvm/test/CodeGen/AArch64/branch-target-enforcement-indirect-calls.ll
index 833a6d5b1d1da..3d8a5976559ba 100644
--- a/llvm/test/CodeGen/AArch64/branch-target-enforcement-indirect-calls.ll
+++ b/llvm/test/CodeGen/AArch64/branch-target-enforcement-indirect-calls.ll
@@ -1,7 +1,5 @@
; RUN: llc -mtriple aarch64 -mattr=+bti < %s | FileCheck %s
-; RUN: llc -mtriple aarch64 -global-isel -global-isel-abort=2
-pass-remarks-missed=gisel* -mattr=+bti %s -verify-machineinstrs -o - 2>&1 |
FileCheck %s --check-prefixes=CHECK,FALLBACK
-
-; FALLBACK: remark: <unknown>:0:0: unable to translate instruction: call: '
tail call void %p()' (in function: bti_enabled)
+; RUN: llc -mtriple aarch64 -global-isel -mattr=+bti < %s | FileCheck %s
target datalayout = "e-m:e-i8:8:32-i16:16:32-i64:64-i128:128-n32:64-S128"
target triple = "aarch64"
diff --git a/llvm/test/CodeGen/AArch64/ptrauth-bti-call.ll
b/llvm/test/CodeGen/AArch64/ptrauth-bti-call.ll
new file mode 100644
index 0000000000000..3a992929a8003
--- /dev/null
+++ b/llvm/test/CodeGen/AArch64/ptrauth-bti-call.ll
@@ -0,0 +1,105 @@
+; RUN: llc -mtriple arm64e-apple-darwin -mattr=+bti
-asm-verbose=false -o - %s | FileCheck %s
+; RUN: llc -mtriple arm64e-apple-darwin -mattr=+bti -global-isel
-asm-verbose=false -o - %s | FileCheck %s
+; RUN: llc -mtriple arm64e-apple-darwin -mattr=+bti -fast-isel
-asm-verbose=false -o - %s | FileCheck %s
+
+; ptrauth tail-calls can only use x16/x17 with BTI.
+
+; CHECK-LABEL: _test_tailcall_ia_0:
+; CHECK-NEXT: bti c
+; CHECK-NEXT: mov x16, x0
+; CHECK-NEXT: braaz x16
+define i32 @test_tailcall_ia_0(i32 ()* %arg0) #0 {
+ %tmp0 = tail call i32 %arg0() [ "ptrauth"(i32 0, i64 0) ]
+ ret i32 %tmp0
+}
+
+; CHECK-LABEL: _test_tailcall_ib_0:
+; CHECK-NEXT: bti c
+; CHECK-NEXT: mov x16, x0
+; CHECK-NEXT: brabz x16
+define i32 @test_tailcall_ib_0(i32 ()* %arg0) #0 {
+ %tmp0 = tail call i32 %arg0() [ "ptrauth"(i32 1, i64 0) ]
+ ret i32 %tmp0
+}
+
+; CHECK-LABEL: _test_tailcall_ia_imm:
+; CHECK-NEXT: bti c
+; CHECK-NEXT: mov x16, x0
+; CHECK-NEXT: mov x17, #42
+; CHECK-NEXT: braa x16, x17
+define i32 @test_tailcall_ia_imm(i32 ()* %arg0) #0 {
+ %tmp0 = tail call i32 %arg0() [ "ptrauth"(i32 0, i64 42) ]
+ ret i32 %tmp0
+}
+
+; CHECK-LABEL: _test_tailcall_ib_imm:
+; CHECK-NEXT: bti c
+; CHECK-NEXT: mov x16, x0
+; CHECK-NEXT: mov x17, #42
+; CHECK-NEXT: brab x16, x17
+define i32 @test_tailcall_ib_imm(i32 ()* %arg0) #0 {
+ %tmp0 = tail call i32 %arg0() [ "ptrauth"(i32 1, i64 42) ]
+ ret i32 %tmp0
+}
+
+; CHECK-LABEL: _test_tailcall_ia_var:
+; CHECK-NEXT: bti c
+; CHECK-NEXT: mov x16, x0
+; CHECK-NEXT: ldr x0, [x1]
+; CHECK-NEXT: braa x16, x0
+define i32 @test_tailcall_ia_var(i32 ()* %arg0, i64* %arg1) #0 {
+ %tmp0 = load i64, i64* %arg1
+ %tmp1 = tail call i32 %arg0() [ "ptrauth"(i32 0, i64 %tmp0) ]
+ ret i32 %tmp1
+}
+
+; CHECK-LABEL: _test_tailcall_ib_var:
+; CHECK-NEXT: bti c
+; CHECK-NEXT: mov x16, x0
+; CHECK-NEXT: ldr x0, [x1]
+; CHECK-NEXT: brab x16, x0
+define i32 @test_tailcall_ib_var(i32 ()* %arg0, i64* %arg1) #0 {
+ %tmp0 = load i64, i64* %arg1
+ %tmp1 = tail call i32 %arg0() [ "ptrauth"(i32 1, i64 %tmp0) ]
+ ret i32 %tmp1
+}
+
+; CHECK-LABEL: _test_tailcall_ia_arg:
+; CHECK-NEXT: bti c
+; CHECK-NEXT: mov x16, x0
+; CHECK-NEXT: braa x16, x1
+define i32 @test_tailcall_ia_arg(i32 ()* %arg0, i64 %arg1) #0 {
+ %tmp0 = tail call i32 %arg0() [ "ptrauth"(i32 0, i64 %arg1) ]
+ ret i32 %tmp0
+}
+
+; CHECK-LABEL: _test_tailcall_ib_arg:
+; CHECK-NEXT: bti c
+; CHECK-NEXT: mov x16, x0
+; CHECK-NEXT: brab x16, x1
+define i32 @test_tailcall_ib_arg(i32 ()* %arg0, i64 %arg1) #0 {
+ %tmp0 = tail call i32 %arg0() [ "ptrauth"(i32 1, i64 %arg1) ]
+ ret i32 %tmp0
+}
+
+; CHECK-LABEL: _test_tailcall_ia_arg_ind:
+; CHECK-NEXT: bti c
+; CHECK-NEXT: ldr x16, [x0]
+; CHECK-NEXT: braa x16, x1
+define i32 @test_tailcall_ia_arg_ind(i32 ()** %arg0, i64 %arg1) #0 {
+ %tmp0 = load i32 ()*, i32 ()** %arg0
+ %tmp1 = tail call i32 %tmp0() [ "ptrauth"(i32 0, i64 %arg1) ]
+ ret i32 %tmp1
+}
+
+; CHECK-LABEL: _test_tailcall_ib_arg_ind:
+; CHECK-NEXT: bti c
+; CHECK-NEXT: ldr x16, [x0]
+; CHECK-NEXT: brab x16, x1
+define i32 @test_tailcall_ib_arg_ind(i32 ()** %arg0, i64 %arg1) #0 {
+ %tmp0 = load i32 ()*, i32 ()** %arg0
+ %tmp1 = tail call i32 %tmp0() [ "ptrauth"(i32 1, i64 %arg1) ]
+ ret i32 %tmp1
+}
+
+attributes #0 = { nounwind "branch-target-enforcement"="true" }
diff --git a/llvm/test/CodeGen/AArch64/ptrauth-call-rv-marker.ll
b/llvm/test/CodeGen/AArch64/ptrauth-call-rv-marker.ll
new file mode 100644
index 0000000000000..9cf77b125e107
--- /dev/null
+++ b/llvm/test/CodeGen/AArch64/ptrauth-call-rv-marker.ll
@@ -0,0 +1,154 @@
+; RUN: llc -verify-machineinstrs -o - %s | FileCheck %s
+; RUN: llc -verify-machineinstrs -global-isel -o - %s | FileCheck %s
+
+target datalayout = "e-m:e-i8:8:32-i16:16:32-i64:64-i128:128-n32:64-S128"
+target triple = "arm64e-apple-iphoneos"
+
+declare i8* @foo0(i32)
+declare i8* @foo1()
+
+declare void @llvm.objc.release(i8*)
+declare i8* @llvm.objc.retainAutoreleasedReturnValue(i8*)
+declare i8* @llvm.objc.unsafeClaimAutoreleasedReturnValue(i8*)
+
+declare void @foo2(i8*)
+
+declare void @foo(i64, i64, i64)
+
+define void @rv_marker_ptrauth_blraa(i8* ()** %arg0, i64 %arg1) {
+; CHECK-LABEL: rv_marker_ptrauth_blraa
+; CHECK: ldr [[ADDR:x[0-9]+]], [
+; CHECK-NEXT: blraa [[ADDR]], x1
+; CHECK-NEXT: mov x29, x29
+; CHECK-NEXT: bl objc_retainAutoreleasedReturnValue
+;
+entry:
+ %tmp0 = load i8* ()*, i8* ()** %arg0
+ %call0 = call i8* %tmp0() [ "ptrauth"(i32 0, i64 %arg1),
"clang.arc.attachedcall"(i8* (i8*)* @llvm.objc.retainAutoreleasedReturnValue) ]
+ tail call void @foo2(i8* %call0)
+ tail call void @llvm.objc.release(i8* %call0)
+ ret void
+}
+
+define void @rv_marker_ptrauth_blraa_unsafeClaim(i8* ()** %arg0, i64 %arg1) {
+; CHECK-LABEL: rv_marker_ptrauth_blraa_unsafeClaim
+; CHECK: ldr [[ADDR:x[0-9]+]], [
+; CHECK-NEXT: blraa [[ADDR]], x1
+; CHECK-NEXT: mov x29, x29
+; CHECK-NEXT: bl objc_unsafeClaimAutoreleasedReturnValue
+;
+entry:
+ %tmp0 = load i8* ()*, i8* ()** %arg0
+ %call0 = call i8* %tmp0() [ "ptrauth"(i32 0, i64 %arg1),
"clang.arc.attachedcall"(i8* (i8*)*
@llvm.objc.unsafeClaimAutoreleasedReturnValue) ]
+ tail call void @foo2(i8* %call0)
+ tail call void @llvm.objc.release(i8* %call0)
+ ret void
+}
+
+define void @rv_marker_ptrauth_blraa_disc_imm16(i8* ()** %arg0) {
+; CHECK-LABEL: rv_marker_ptrauth_blraa_disc_imm16
+; CHECK: ldr [[ADDR:x[0-9]+]], [
+; CHECK-NEXT: mov x17, #45431
+; CHECK-NEXT: blrab [[ADDR]], x17
+; CHECK-NEXT: mov x29, x29
+; CHECK-NEXT: bl objc_retainAutoreleasedReturnValue
+;
+ %tmp0 = load i8* ()*, i8* ()** %arg0
+ %call0 = call i8* %tmp0() [ "ptrauth"(i32 1, i64 45431),
"clang.arc.attachedcall"(i8* (i8*)* @llvm.objc.retainAutoreleasedReturnValue) ]
+ tail call void @foo2(i8* %call0)
+ tail call void @llvm.objc.release(i8* %call0)
+ ret void
+}
+
+define void @rv_marker_ptrauth_blraa_multiarg(i8* (i64, i64, i64)** %arg0, i64
%arg1, i64 %a, i64 %b, i64 %c) {
+; CHECK-LABEL: rv_marker_ptrauth_blraa_multiarg
+; CHECK: mov [[TMP:x[0-9]+]], x1
+; CHECK-DAG: ldr [[ADDR:x[0-9]+]]
+; CHECK-DAG: mov x0, x4
+; CHECK-DAG: mov x1, x3
+; CHECK-NEXT: blraa [[ADDR]], [[TMP]]
+; CHECK-NEXT: mov x29, x29
+; CHECK-NEXT: bl objc_retainAutoreleasedReturnValue
+;
+entry:
+ %tmp0 = load i8* (i64, i64, i64)*, i8* (i64, i64, i64)** %arg0
+ %call0 = call i8* %tmp0(i64 %c, i64 %b, i64 %a) [ "ptrauth"(i32 0, i64
%arg1), "clang.arc.attachedcall"(i8* (i8*)*
@llvm.objc.retainAutoreleasedReturnValue) ]
+ tail call void @foo2(i8* %call0)
+ tail call void @llvm.objc.release(i8* %call0)
+ ret void
+}
+
+define void @rv_marker_ptrauth_blrab(i8* ()** %arg0, i64 %arg1) {
+; CHECK-LABEL: rv_marker_ptrauth_blrab
+; CHECK: ldr [[ADDR:x[0-9]+]], [
+; CHECK-NEXT: blrab [[ADDR]], x1
+; CHECK-NEXT: mov x29, x29
+; CHECK-NEXT: bl objc_retainAutoreleasedReturnValue
+;
+ %tmp0 = load i8* ()*, i8* ()** %arg0
+ %call0 = call i8* %tmp0() [ "ptrauth"(i32 1, i64 %arg1),
"clang.arc.attachedcall"(i8* (i8*)* @llvm.objc.retainAutoreleasedReturnValue) ]
+ tail call void @foo2(i8* %call0)
+ tail call void @llvm.objc.release(i8* %call0)
+ ret void
+}
+
+define void @rv_marker_ptrauth_blrab_disc_imm16(i8* ()** %arg0) {
+; CHECK-LABEL: rv_marker_ptrauth_blrab_disc_imm16
+; CHECK: ldr [[ADDR:x[0-9]+]], [
+; CHECK-NEXT: mov x17, #256
+; CHECK-NEXT: blrab [[ADDR]], x17
+; CHECK-NEXT: mov x29, x29
+; CHECK-NEXT: bl objc_retainAutoreleasedReturnValue
+;
+ %tmp0 = load i8* ()*, i8* ()** %arg0
+ %call0 = call i8* %tmp0() [ "ptrauth"(i32 1, i64 256),
"clang.arc.attachedcall"(i8* (i8*)* @llvm.objc.retainAutoreleasedReturnValue) ]
+ tail call void @foo2(i8* %call0)
+ tail call void @llvm.objc.release(i8* %call0)
+ ret void
+}
+
+define void @rv_marker_ptrauth_blraaz(i8* ()** %arg0) {
+; CHECK-LABEL: rv_marker_ptrauth_blraaz
+; CHECK: ldr [[ADDR:x[0-9]+]], [
+; CHECK-NEXT: blraaz [[ADDR]]
+; CHECK-NEXT: mov x29, x29
+; CHECK-NEXT: bl objc_retainAutoreleasedReturnValue
+;
+ %tmp0 = load i8* ()*, i8* ()** %arg0
+ %call0 = call i8* %tmp0() [ "ptrauth"(i32 0, i64 0),
"clang.arc.attachedcall"(i8* (i8*)* @llvm.objc.retainAutoreleasedReturnValue) ]
+ tail call void @foo2(i8* %call0)
+ tail call void @llvm.objc.release(i8* %call0)
+ ret void
+}
+
+define void @rv_marker_ptrauth_blrabz(i8* ()** %arg0) {
+; CHECK-LABEL: rv_marker_ptrauth_blrabz
+; CHECK: ldr [[ADDR:x[0-9]+]], [
+; CHECK-NEXT: blrabz [[ADDR]]
+; CHECK-NEXT: mov x29, x29
+; CHECK-NEXT: bl objc_retainAutoreleasedReturnValue
+;
+ %tmp0 = load i8* ()*, i8* ()** %arg0
+ %call0 = call i8* %tmp0() [ "ptrauth"(i32 1, i64 0),
"clang.arc.attachedcall"(i8* (i8*)* @llvm.objc.retainAutoreleasedReturnValue) ]
+ tail call void @foo2(i8* %call0)
+ tail call void @llvm.objc.release(i8* %call0)
+ ret void
+}
+
+define void @rv_marker_ptrauth_blrabz_multiarg(i8* (i64, i64, i64)** %arg0,
i64 %a, i64 %b, i64 %c) {
+; CHECK-LABEL: rv_marker_ptrauth_blrabz_multiarg
+; CHECK: mov [[TMP:x[0-9]+]], x1
+; CHECK-DAG: ldr [[ADDR:x[0-9]+]], [
+; CHECK-DAG: mov x0, x3
+; CHECK-DAG: mov x1, x2
+; CHECK-DAG: mov x2, [[TMP]]
+; CHECK-NEXT: blrabz [[ADDR]]
+; CHECK-NEXT: mov x29, x29
+; CHECK-NEXT: bl objc_retainAutoreleasedReturnValue
+;
+ %tmp0 = load i8* (i64, i64, i64)*, i8* (i64, i64, i64)** %arg0
+ %call0 = call i8* %tmp0(i64 %c, i64 %b, i64 %a) [ "ptrauth"(i32 1, i64 0),
"clang.arc.attachedcall"(i8* (i8*)* @llvm.objc.retainAutoreleasedReturnValue) ]
+ tail call void @foo2(i8* %call0)
+ tail call void @llvm.objc.release(i8* %call0)
+ ret void
+}
diff --git a/llvm/test/CodeGen/AArch64/ptrauth-call.ll
b/llvm/test/CodeGen/AArch64/ptrauth-call.ll
new file mode 100644
index 0000000000000..585ac0e75e6ac
--- /dev/null
+++ b/llvm/test/CodeGen/AArch64/ptrauth-call.ll
@@ -0,0 +1,195 @@
+; RUN: llc -mtriple arm64e-apple-darwin
-asm-verbose=false -o - %s | FileCheck %s
+; RUN: llc -mtriple arm64e-apple-darwin -global-isel -global-isel-abort=1
-asm-verbose=false -o - %s | FileCheck %s
+; RUN: llc -mtriple arm64e-apple-darwin -emit-call-site-info
-asm-verbose=false -o - %s | FileCheck %s
+
+; CHECK-LABEL: _test_call_ia_0:
+; CHECK-NEXT: stp x29, x30, [sp, #-16]!
+; CHECK-NEXT: blraaz x0
+; CHECK-NEXT: ldp x29, x30, [sp], #16
+; CHECK-NEXT: ret
+define i32 @test_call_ia_0(i32 ()* %arg0) #0 {
+ %tmp0 = call i32 %arg0() [ "ptrauth"(i32 0, i64 0) ]
+ ret i32 %tmp0
+}
+
+; CHECK-LABEL: _test_call_ib_0:
+; CHECK-NEXT: stp x29, x30, [sp, #-16]!
+; CHECK-NEXT: blrabz x0
+; CHECK-NEXT: ldp x29, x30, [sp], #16
+; CHECK-NEXT: ret
+define i32 @test_call_ib_0(i32 ()* %arg0) #0 {
+ %tmp0 = call i32 %arg0() [ "ptrauth"(i32 1, i64 0) ]
+ ret i32 %tmp0
+}
+
+; CHECK-LABEL: _test_tailcall_ia_0:
+; CHECK-NEXT: braaz x0
+define i32 @test_tailcall_ia_0(i32 ()* %arg0) #0 {
+ %tmp0 = tail call i32 %arg0() [ "ptrauth"(i32 0, i64 0) ]
+ ret i32 %tmp0
+}
+
+; CHECK-LABEL: _test_tailcall_ib_0:
+; CHECK-NEXT: brabz x0
+define i32 @test_tailcall_ib_0(i32 ()* %arg0) #0 {
+ %tmp0 = tail call i32 %arg0() [ "ptrauth"(i32 1, i64 0) ]
+ ret i32 %tmp0
+}
+
+; CHECK-LABEL: _test_call_ia_imm:
+; CHECK-NEXT: stp x29, x30, [sp, #-16]!
+; CHECK-NEXT: mov x17, #42
+; CHECK-NEXT: blraa x0, x17
+; CHECK-NEXT: ldp x29, x30, [sp], #16
+; CHECK-NEXT: ret
+define i32 @test_call_ia_imm(i32 ()* %arg0) #0 {
+ %tmp0 = call i32 %arg0() [ "ptrauth"(i32 0, i64 42) ]
+ ret i32 %tmp0
+}
+
+; CHECK-LABEL: _test_call_ib_imm:
+; CHECK-NEXT: stp x29, x30, [sp, #-16]!
+; CHECK-NEXT: mov x17, #42
+; CHECK-NEXT: blrab x0, x17
+; CHECK-NEXT: ldp x29, x30, [sp], #16
+; CHECK-NEXT: ret
+define i32 @test_call_ib_imm(i32 ()* %arg0) #0 {
+ %tmp0 = call i32 %arg0() [ "ptrauth"(i32 1, i64 42) ]
+ ret i32 %tmp0
+}
+
+; CHECK-LABEL: _test_tailcall_ia_imm:
+; CHECK-NEXT: mov x16, #42
+; CHECK-NEXT: braa x0, x16
+define i32 @test_tailcall_ia_imm(i32 ()* %arg0) #0 {
+ %tmp0 = tail call i32 %arg0() [ "ptrauth"(i32 0, i64 42) ]
+ ret i32 %tmp0
+}
+
+; CHECK-LABEL: _test_tailcall_ib_imm:
+; CHECK-NEXT: mov x16, #42
+; CHECK-NEXT: brab x0, x16
+define i32 @test_tailcall_ib_imm(i32 ()* %arg0) #0 {
+ %tmp0 = tail call i32 %arg0() [ "ptrauth"(i32 1, i64 42) ]
+ ret i32 %tmp0
+}
+
+; CHECK-LABEL: _test_call_ia_var:
+; CHECK-NEXT: stp x29, x30, [sp, #-16]!
+; CHECK-NEXT: ldr x8, [x1]
+; CHECK-NEXT: blraa x0, x8
+; CHECK-NEXT: ldp x29, x30, [sp], #16
+; CHECK-NEXT: ret
+define i32 @test_call_ia_var(i32 ()* %arg0, i64* %arg1) #0 {
+ %tmp0 = load i64, i64* %arg1
+ %tmp1 = call i32 %arg0() [ "ptrauth"(i32 0, i64 %tmp0) ]
+ ret i32 %tmp1
+}
+
+; CHECK-LABEL: _test_call_ib_var:
+; CHECK-NEXT: stp x29, x30, [sp, #-16]!
+; CHECK-NEXT: ldr x8, [x1]
+; CHECK-NEXT: blrab x0, x8
+; CHECK-NEXT: ldp x29, x30, [sp], #16
+; CHECK-NEXT: ret
+define i32 @test_call_ib_var(i32 ()* %arg0, i64* %arg1) #0 {
+ %tmp0 = load i64, i64* %arg1
+ %tmp1 = call i32 %arg0() [ "ptrauth"(i32 1, i64 %tmp0) ]
+ ret i32 %tmp1
+}
+
+; CHECK-LABEL: _test_tailcall_ia_var:
+; CHECK-NEXT: ldr x1, [x1]
+; CHECK-NEXT: braa x0, x1
+define i32 @test_tailcall_ia_var(i32 ()* %arg0, i64* %arg1) #0 {
+ %tmp0 = load i64, i64* %arg1
+ %tmp1 = tail call i32 %arg0() [ "ptrauth"(i32 0, i64 %tmp0) ]
+ ret i32 %tmp1
+}
+
+; CHECK-LABEL: _test_tailcall_ib_var:
+; CHECK-NEXT: ldr x1, [x1]
+; CHECK-NEXT: brab x0, x1
+define i32 @test_tailcall_ib_var(i32 ()* %arg0, i64* %arg1) #0 {
+ %tmp0 = load i64, i64* %arg1
+ %tmp1 = tail call i32 %arg0() [ "ptrauth"(i32 1, i64 %tmp0) ]
+ ret i32 %tmp1
+}
+
+; CHECK-LABEL: _test_call_ia_arg:
+; CHECK-NEXT: stp x29, x30, [sp, #-16]!
+; CHECK-NEXT: blraa x0, x1
+; CHECK-NEXT: ldp x29, x30, [sp], #16
+; CHECK-NEXT: ret
+define i32 @test_call_ia_arg(i32 ()* %arg0, i64 %arg1) #0 {
+ %tmp0 = call i32 %arg0() [ "ptrauth"(i32 0, i64 %arg1) ]
+ ret i32 %tmp0
+}
+
+; CHECK-LABEL: _test_call_ib_arg:
+; CHECK-NEXT: stp x29, x30, [sp, #-16]!
+; CHECK-NEXT: blrab x0, x1
+; CHECK-NEXT: ldp x29, x30, [sp], #16
+; CHECK-NEXT: ret
+define i32 @test_call_ib_arg(i32 ()* %arg0, i64 %arg1) #0 {
+ %tmp0 = call i32 %arg0() [ "ptrauth"(i32 1, i64 %arg1) ]
+ ret i32 %tmp0
+}
+
+; CHECK-LABEL: _test_tailcall_ia_arg:
+; CHECK-NEXT: braa x0, x1
+define i32 @test_tailcall_ia_arg(i32 ()* %arg0, i64 %arg1) #0 {
+ %tmp0 = tail call i32 %arg0() [ "ptrauth"(i32 0, i64 %arg1) ]
+ ret i32 %tmp0
+}
+
+; CHECK-LABEL: _test_tailcall_ib_arg:
+; CHECK-NEXT: brab x0, x1
+define i32 @test_tailcall_ib_arg(i32 ()* %arg0, i64 %arg1) #0 {
+ %tmp0 = tail call i32 %arg0() [ "ptrauth"(i32 1, i64 %arg1) ]
+ ret i32 %tmp0
+}
+
+; CHECK-LABEL: _test_call_ia_arg_ind:
+; CHECK-NEXT: stp x29, x30, [sp, #-16]!
+; CHECK-NEXT: ldr x8, [x0]
+; CHECK-NEXT: blraa x8, x1
+; CHECK-NEXT: ldp x29, x30, [sp], #16
+; CHECK-NEXT: ret
+define i32 @test_call_ia_arg_ind(i32 ()** %arg0, i64 %arg1) #0 {
+ %tmp0 = load i32 ()*, i32 ()** %arg0
+ %tmp1 = call i32 %tmp0() [ "ptrauth"(i32 0, i64 %arg1) ]
+ ret i32 %tmp1
+}
+
+; CHECK-LABEL: _test_call_ib_arg_ind:
+; CHECK-NEXT: stp x29, x30, [sp, #-16]!
+; CHECK-NEXT: ldr x8, [x0]
+; CHECK-NEXT: blrab x8, x1
+; CHECK-NEXT: ldp x29, x30, [sp], #16
+; CHECK-NEXT: ret
+define i32 @test_call_ib_arg_ind(i32 ()** %arg0, i64 %arg1) #0 {
+ %tmp0 = load i32 ()*, i32 ()** %arg0
+ %tmp1 = call i32 %tmp0() [ "ptrauth"(i32 1, i64 %arg1) ]
+ ret i32 %tmp1
+}
+
+; CHECK-LABEL: _test_tailcall_ia_arg_ind:
+; CHECK-NEXT: ldr x0, [x0]
+; CHECK-NEXT: braa x0, x1
+define i32 @test_tailcall_ia_arg_ind(i32 ()** %arg0, i64 %arg1) #0 {
+ %tmp0 = load i32 ()*, i32 ()** %arg0
+ %tmp1 = tail call i32 %tmp0() [ "ptrauth"(i32 0, i64 %arg1) ]
+ ret i32 %tmp1
+}
+
+; CHECK-LABEL: _test_tailcall_ib_arg_ind:
+; CHECK-NEXT: ldr x0, [x0]
+; CHECK-NEXT: brab x0, x1
+define i32 @test_tailcall_ib_arg_ind(i32 ()** %arg0, i64 %arg1) #0 {
+ %tmp0 = load i32 ()*, i32 ()** %arg0
+ %tmp1 = tail call i32 %tmp0() [ "ptrauth"(i32 1, i64 %arg1) ]
+ ret i32 %tmp1
+}
+
+attributes #0 = { nounwind }
diff --git a/llvm/test/CodeGen/AArch64/ptrauth-invoke.ll
b/llvm/test/CodeGen/AArch64/ptrauth-invoke.ll
new file mode 100644
index 0000000000000..bea699dbee37a
--- /dev/null
+++ b/llvm/test/CodeGen/AArch64/ptrauth-invoke.ll
@@ -0,0 +1,189 @@
+; RUN: llc -mtriple arm64e-apple-darwin -o - %s | FileCheck %s
--check-prefixes=CHECK,SDAG
+; RUN: llc -mtriple arm64e-apple-darwin -fast-isel -o - %s | FileCheck %s
--check-prefixes=CHECK,FISEL
+
+; CHECK-LABEL: _test_invoke_ia_0:
+; CHECK-NEXT: [[FNBEGIN:L.*]]:
+; CHECK-NEXT: .cfi_startproc
+; CHECK-NEXT: .cfi_personality 155, ___gxx_personality_v0
+; CHECK-NEXT: .cfi_lsda 16, [[EXCEPT:Lexception[0-9]+]]
+; CHECK-NEXT: ; %bb.0:
+; CHECK-NEXT: stp x20, x19, [sp, #-32]!
+; CHECK-NEXT: stp x29, x30, [sp, #16]
+; CHECK-NEXT: .cfi_def_cfa_offset 32
+; CHECK-NEXT: .cfi_offset w30, -8
+; CHECK-NEXT: .cfi_offset w29, -16
+; CHECK-NEXT: .cfi_offset w19, -24
+; CHECK-NEXT: .cfi_offset w20, -32
+; CHECK-NEXT: [[PRECALL:L.*]]:
+; CHECK-NEXT: blraaz x0
+; CHECK-NEXT: [[POSTCALL:L.*]]:
+; CHECK-NEXT: ; %bb.1:
+; CHECK-NEXT: mov x19, x0
+; CHECK-NEXT: [[CALLBB:L.*]]:
+; CHECK-NEXT: bl _foo
+; CHECK-NEXT: mov x0, x19
+; CHECK-NEXT: ldp x29, x30, [sp, #16]
+; CHECK-NEXT: ldp x20, x19, [sp], #32
+; CHECK-NEXT: ret
+; CHECK-NEXT: [[LPADBB:LBB[0-9_]+]]:
+; CHECK-NEXT: [[LPAD:L.*]]:
+; CHECK-NEXT: mov w19, #-1
+; CHECK-NEXT: b [[CALLBB]]
+
+; CHECK-LABEL: GCC_except_table{{.*}}:
+; CHECK-NEXT: [[EXCEPT]]:
+; CHECK: .uleb128 [[POSTCALL]]-[[PRECALL]] ; Call between [[PRECALL]]
and [[POSTCALL]]
+; CHECK-NEXT: .uleb128 [[LPAD]]-[[FNBEGIN]] ; jumps to [[LPAD]]
+; CHECK-NEXT: .byte 0 ; On action: cleanup
+
+define i32 @test_invoke_ia_0(ptr %arg0) #0 personality ptr
@__gxx_personality_v0 {
+ %tmp0 = invoke i32 %arg0() [ "ptrauth"(i32 0, i64 0) ] to label %continuebb
+ unwind label %unwindbb
+
+unwindbb:
+ %tmp1 = landingpad { ptr, i32 } cleanup
+ call void @foo()
+ ret i32 -1
+
+continuebb:
+ call void @foo()
+ ret i32 %tmp0
+}
+
+@_ZTIPKc = external constant ptr
+@hello_str = private unnamed_addr constant [6 x i8] c"hello\00", align 1
+
+; CHECK-LABEL: _test_invoke_ib_42_catch:
+; CHECK-NEXT: [[FNBEGIN:L.*]]:
+; CHECK-NEXT: .cfi_startproc
+; CHECK-NEXT: .cfi_personality 155, ___gxx_personality_v0
+; CHECK-NEXT: .cfi_lsda 16, [[EXCEPT:Lexception[0-9]+]]
+; CHECK-NEXT: ; %bb.0:
+; CHECK-NEXT: stp x20, x19, [sp, #-32]!
+; CHECK-NEXT: stp x29, x30, [sp, #16]
+; CHECK-NEXT: .cfi_def_cfa_offset 32
+; CHECK-NEXT: .cfi_offset w30, -8
+; CHECK-NEXT: .cfi_offset w29, -16
+; CHECK-NEXT: .cfi_offset w19, -24
+; CHECK-NEXT: .cfi_offset w20, -32
+; CHECK-NEXT: mov x19, x0
+; CHECK-NEXT: mov w0, #8
+; CHECK-NEXT: bl ___cxa_allocate_exception
+; CHECK-NEXT: Lloh{{.*}}:
+; CHECK-NEXT: adrp x8, l_hello_str@PAGE
+; CHECK-NEXT: Lloh{{.*}}:
+; CHECK-NEXT: add x8, x8, l_hello_str@PAGEOFF
+; CHECK-NEXT: str x8, [x0]
+; CHECK-NEXT: [[PRECALL:L.*]]:
+; CHECK-NEXT: Lloh{{.*}}:
+; CHECK-NEXT: adrp x1, __ZTIPKc@GOTPAGE
+; CHECK-NEXT: Lloh{{.*}}:
+; CHECK-NEXT: ldr x1, [x1, __ZTIPKc@GOTPAGEOFF]
+; CHECK-NEXT: mov x2, #0
+; CHECK-NEXT: mov x17, #42
+; CHECK-NEXT: blrab x19, x17
+; CHECK-NEXT: [[POSTCALL:L.*]]:
+; CHECK-NEXT: ; %bb.1:
+; CHECK-NEXT: brk #0x1
+; CHECK-NEXT: [[LPADBB:LBB[0-9_]+]]:
+; CHECK-NEXT: [[LPAD:L.*]]:
+; CHECK-NEXT: mov x19, x1
+
+; SDAG-NEXT: bl ___cxa_begin_catch
+; SDAG-NEXT: cmp w19, #2
+
+; FISEL-NEXT: mov w20, #2
+; FISEL-NEXT: bl ___cxa_begin_catch
+; FISEL-NEXT: cmp w19, w20
+
+; CHECK-NEXT: b.ne [[EXITBB:LBB[0-9_]+]]
+; CHECK-NEXT: ; %bb.3:
+; CHECK-NEXT: bl _bar
+; CHECK-NEXT: [[EXITBB]]:
+; CHECK-NEXT: bl _foo
+; CHECK-NEXT: bl ___cxa_end_catch
+; CHECK-NEXT: ldp x29, x30, [sp, #16]
+; CHECK-NEXT: ldp x20, x19, [sp], #32
+; CHECK-NEXT: ret
+; CHECK-NEXT: .loh {{.*}}
+; CHECK-NEXT: .loh {{.*}}
+; CHECK-NEXT: [[FNEND:L.*]]:
+
+; CHECK-LABEL: GCC_except_table{{.*}}:
+; CHECK-NEXT: [[EXCEPT]]:
+; CHECK-NEXT: .byte 255 ; @LPStart Encoding =
omit
+; CHECK-NEXT: .byte 155 ; @TType Encoding =
indirect pcrel sdata4
+; CHECK-NEXT: .uleb128 [[TT:L.*]]-[[TTREF:L.*]]
+; CHECK-NEXT: [[TTREF]]:
+; CHECK-NEXT: .byte 1 ; Call site Encoding =
uleb128
+; CHECK-NEXT: .uleb128 [[CSEND:L.*]]-[[CSBEGIN:L.*]]
+; CHECK-NEXT: [[CSBEGIN]]:
+; CHECK-NEXT: .uleb128 [[FNBEGIN]]-[[FNBEGIN]] ; >> Call Site 1 <<
+; CHECK-NEXT: .uleb128 [[PRECALL]]-[[FNBEGIN]] ; Call between
[[FNBEGIN]] and [[PRECALL]]
+; CHECK-NEXT: .byte 0 ; has no landing
pad
+; CHECK-NEXT: .byte 0 ; On action: cleanup
+; CHECK-NEXT: .uleb128 [[PRECALL]]-[[FNBEGIN]] ; >> Call Site 2 <<
+; CHECK-NEXT: .uleb128 [[POSTCALL]]-[[PRECALL]] ; Call between
[[PRECALL]] and [[POSTCALL]]
+; CHECK-NEXT: .uleb128 [[LPAD]]-[[FNBEGIN]] ; jumps to [[LPAD]]
+; CHECK-NEXT: .byte 3 ; On action: 2
+; CHECK-NEXT: .uleb128 [[POSTCALL]]-[[FNBEGIN]] ; >> Call Site 3 <<
+; CHECK-NEXT: .uleb128 [[FNEND]]-[[POSTCALL]] ; Call between
[[POSTCALL]] and [[FNEND]]
+; CHECK-NEXT: .byte 0 ; has no landing
pad
+; CHECK-NEXT: .byte 0 ; On action: cleanup
+; CHECK-NEXT: [[CSEND]]:
+
+; CHECK-NEXT: .byte 1 ; >> Action Record 1 <<
+; CHECK-NEXT: ; Catch TypeInfo 1
+; CHECK-NEXT: .byte 0 ; No further actions
+; CHECK-NEXT: .byte 2 ; >> Action Record 2 <<
+; CHECK-NEXT: ; Catch TypeInfo 2
+; CHECK-NEXT: .byte 125 ; Continue to action 1
+; CHECK-NEXT: .p2align 2
+; CHECK-NEXT: ; >> Catch TypeInfos <<
+; CHECK-NEXT: [[TI:L.*]]: ; TypeInfo 2
+; CHECK-NEXT: .long __ZTIPKc@GOT-[[TI]]
+; CHECK-NEXT: .long 0 ; TypeInfo 1
+
+; CHECK-NEXT: [[TT]]:
+
+define void @test_invoke_ib_42_catch(ptr %fptr) #0 personality ptr
@__gxx_personality_v0 {
+ %tmp0 = call ptr @__cxa_allocate_exception(i64 8)
+ store ptr getelementptr inbounds ([6 x i8], ptr @hello_str, i64 0, i64 0),
ptr %tmp0, align 8
+ invoke void %fptr(ptr %tmp0, ptr @_ZTIPKc, ptr null) [ "ptrauth"(i32 1, i64
42) ]
+ to label %continuebb unwind label %catchbb
+
+catchbb:
+ %tmp2 = landingpad { ptr, i32 }
+ catch ptr @_ZTIPKc
+ catch ptr null
+ %tmp3 = extractvalue { ptr, i32 } %tmp2, 0
+ %tmp4 = extractvalue { ptr, i32 } %tmp2, 1
+ %tmp5 = call i32 @llvm.eh.typeid.for(ptr @_ZTIPKc)
+ %tmp6 = icmp eq i32 %tmp4, %tmp5
+ %tmp7 = call ptr @__cxa_begin_catch(ptr %tmp3)
+ br i1 %tmp6, label %PKc_catchbb, label %any_catchbb
+
+PKc_catchbb:
+ call void @bar(ptr %tmp7)
+ br label %any_catchbb
+
+any_catchbb:
+ call void @foo()
+ call void @__cxa_end_catch()
+ ret void
+
+continuebb:
+ unreachable
+}
+
+declare void @foo()
+declare void @bar(ptr)
+
+declare i32 @__gxx_personality_v0(...)
+declare ptr @__cxa_allocate_exception(i64)
+declare void @__cxa_throw(ptr, ptr, ptr)
+declare i32 @llvm.eh.typeid.for(ptr)
+declare ptr @__cxa_begin_catch(ptr)
+declare void @__cxa_end_catch()
+
+attributes #0 = { nounwind }
>From d643a058e370da6f029cb50a8962b3eefd016451 Mon Sep 17 00:00:00 2001
From: Ahmed Bougacha <ah...@bougacha.org>
Date: Thu, 23 May 2024 12:49:09 -0700
Subject: [PATCH 3/3] Address review feedback.
- test invoke for ELF as well
- consolidate GISel/SDAG invoke test
- check key/disc validity in consistent ways
- misc. nits
---
llvm/lib/Target/AArch64/AArch64AsmPrinter.cpp | 24 +-
.../Target/AArch64/AArch64ISelLowering.cpp | 8 +-
.../AArch64/GISel/AArch64CallLowering.cpp | 24 +-
.../AArch64/GlobalISel/ptrauth-invoke.ll | 183 ----------
llvm/test/CodeGen/AArch64/ptrauth-invoke.ll | 321 +++++++++++-------
5 files changed, 237 insertions(+), 323 deletions(-)
delete mode 100644 llvm/test/CodeGen/AArch64/GlobalISel/ptrauth-invoke.ll
diff --git a/llvm/lib/Target/AArch64/AArch64AsmPrinter.cpp
b/llvm/lib/Target/AArch64/AArch64AsmPrinter.cpp
index 7d663e5f9d96d..dcba47500cf06 100644
--- a/llvm/lib/Target/AArch64/AArch64AsmPrinter.cpp
+++ b/llvm/lib/Target/AArch64/AArch64AsmPrinter.cpp
@@ -1779,18 +1779,20 @@ void AArch64AsmPrinter::emitPtrauthBranch(const
MachineInstr *MI) {
unsigned InstsEmitted = 0;
unsigned BrTarget = MI->getOperand(0).getReg();
+
auto Key = (AArch64PACKey::ID)MI->getOperand(1).getImm();
+ assert((Key == AArch64PACKey::IA || Key == AArch64PACKey::IB) &&
+ "Invalid auth call key");
+
uint64_t Disc = MI->getOperand(2).getImm();
+ assert(isUInt<16>(Disc));
+
unsigned AddrDisc = MI->getOperand(3).getReg();
// Compute discriminator into x17
- assert(isUInt<16>(Disc));
unsigned DiscReg = emitPtrauthDiscriminator(Disc, AddrDisc, InstsEmitted);
bool IsZeroDisc = DiscReg == AArch64::XZR;
- assert((Key == AArch64PACKey::IA || Key == AArch64PACKey::IB) &&
- "Invalid auth call key");
-
unsigned Opc;
if (Key == AArch64PACKey::IA)
Opc = IsZeroDisc ? AArch64::BLRAAZ : AArch64::BLRAA;
@@ -1958,8 +1960,12 @@ void AArch64AsmPrinter::emitInstruction(const
MachineInstr *MI) {
case AArch64::AUTH_TCRETURN:
case AArch64::AUTH_TCRETURN_BTI: {
const uint64_t Key = MI->getOperand(2).getImm();
- assert(Key < 2 && "Unknown key kind for authenticating tail-call return");
+ assert((Key == AArch64PACKey::IA || Key == AArch64PACKey::IB) &&
+ "Invalid auth key for tail-call return");
+
const uint64_t Disc = MI->getOperand(3).getImm();
+ assert(isUInt<16>(Disc) && "Integer discriminator is too wide");
+
Register AddrDisc = MI->getOperand(4).getReg();
Register ScratchReg = MI->getOperand(0).getReg() == AArch64::X16
@@ -1968,8 +1974,6 @@ void AArch64AsmPrinter::emitInstruction(const
MachineInstr *MI) {
unsigned DiscReg = AddrDisc;
if (Disc) {
- assert(isUInt<16>(Disc) && "Integer discriminator is too wide");
-
if (AddrDisc != AArch64::NoRegister) {
EmitToStreamer(*OutStreamer, MCInstBuilder(AArch64::ORRXrs)
.addReg(ScratchReg)
@@ -1990,14 +1994,14 @@ void AArch64AsmPrinter::emitInstruction(const
MachineInstr *MI) {
DiscReg = ScratchReg;
}
- const bool isZero = DiscReg == AArch64::NoRegister;
+ const bool IsZero = DiscReg == AArch64::NoRegister;
const unsigned Opcodes[2][2] = {{AArch64::BRAA, AArch64::BRAAZ},
{AArch64::BRAB, AArch64::BRABZ}};
MCInst TmpInst;
- TmpInst.setOpcode(Opcodes[Key][isZero]);
+ TmpInst.setOpcode(Opcodes[Key][IsZero]);
TmpInst.addOperand(MCOperand::createReg(MI->getOperand(0).getReg()));
- if (!isZero)
+ if (!IsZero)
TmpInst.addOperand(MCOperand::createReg(DiscReg));
EmitToStreamer(*OutStreamer, TmpInst);
return;
diff --git a/llvm/lib/Target/AArch64/AArch64ISelLowering.cpp
b/llvm/lib/Target/AArch64/AArch64ISelLowering.cpp
index c5f08e8b1817a..ef34a8539ffa7 100644
--- a/llvm/lib/Target/AArch64/AArch64ISelLowering.cpp
+++ b/llvm/lib/Target/AArch64/AArch64ISelLowering.cpp
@@ -8468,8 +8468,9 @@ AArch64TargetLowering::LowerCall(CallLoweringInfo &CLI,
Ops.insert(Ops.begin() + 1, GA);
} else if (CallConv == CallingConv::ARM64EC_Thunk_X64) {
Opc = AArch64ISD::CALL_ARM64EC_TO_X64;
- } else if (GuardWithBTI)
+ } else if (GuardWithBTI) {
Opc = AArch64ISD::CALL_BTI;
+ }
if (IsTailCall) {
// Each tail call may have to adjust the stack by a different amount, so
@@ -8480,9 +8481,8 @@ AArch64TargetLowering::LowerCall(CallLoweringInfo &CLI,
if (CLI.PAI) {
const uint64_t Key = CLI.PAI->Key;
- // Authenticated calls only support IA and IB.
- if (Key > 1)
- report_fatal_error("Unsupported key kind for authenticating call");
+ assert((Key == AArch64PACKey::IA || Key == AArch64PACKey::IB) &&
+ "Invalid auth call key");
// Split the discriminator into address/integer components.
SDValue AddrDisc, IntDisc;
diff --git a/llvm/lib/Target/AArch64/GISel/AArch64CallLowering.cpp
b/llvm/lib/Target/AArch64/GISel/AArch64CallLowering.cpp
index 53c35aa835bbc..0bac9d74ed5a8 100644
--- a/llvm/lib/Target/AArch64/GISel/AArch64CallLowering.cpp
+++ b/llvm/lib/Target/AArch64/GISel/AArch64CallLowering.cpp
@@ -1021,10 +1021,11 @@ static unsigned getCallOpcode(const MachineFunction
&CallerF, bool IsIndirect,
if (!IsTailCall) {
if (!PAI)
- return IsIndirect ? getBLRCallOpcode(CallerF) : (unsigned)AArch64::BL;
+ return IsIndirect ? getBLRCallOpcode(CallerF) : AArch64::BL;
- assert(IsIndirect && "authenticated direct call");
- assert(PAI->Key == 0 || PAI->Key == 1 && "invalid ptrauth key");
+ assert(IsIndirect && "Direct call should not be authenticated");
+ assert((PAI->Key == AArch64PACKey::IA || PAI->Key == AArch64PACKey::IB) &&
+ "Invalid auth call key");
return AArch64::BLRA;
}
@@ -1036,11 +1037,12 @@ static unsigned getCallOpcode(const MachineFunction
&CallerF, bool IsIndirect,
if (FuncInfo->branchTargetEnforcement()) {
if (PAI)
return AArch64::AUTH_TCRETURN_BTI;
- else if (FuncInfo->branchProtectionPAuthLR())
+ if (FuncInfo->branchProtectionPAuthLR())
return AArch64::TCRETURNrix17;
- else
- return AArch64::TCRETURNrix16x17;
- } else if (FuncInfo->branchProtectionPAuthLR())
+ return AArch64::TCRETURNrix16x17;
+ }
+
+ if (FuncInfo->branchProtectionPAuthLR())
return AArch64::TCRETURNrinotx16;
if (PAI)
@@ -1104,7 +1106,9 @@ bool AArch64CallLowering::lowerTailCall(
// Authenticated tail calls always take key/discriminator arguments.
if (Opc == AArch64::AUTH_TCRETURN || Opc == AArch64::AUTH_TCRETURN_BTI) {
- assert(Info.PAI->Key == 0 || Info.PAI->Key == 1 && "invalid key");
+ assert((Info.PAI->Key == AArch64PACKey::IA ||
+ Info.PAI->Key == AArch64PACKey::IB) &&
+ "Invalid auth call key");
MIB.addImm(Info.PAI->Key);
Register AddrDisc = 0;
@@ -1371,7 +1375,9 @@ bool AArch64CallLowering::lowerCall(MachineIRBuilder
&MIRBuilder,
Mask = getMaskForArgs(OutArgs, Info, *TRI, MF);
if (Opc == AArch64::BLRA || Opc == AArch64::BLRA_RVMARKER) {
- assert(Info.PAI->Key == 0 || Info.PAI->Key == 1 && "invalid key");
+ assert((Info.PAI->Key == AArch64PACKey::IA ||
+ Info.PAI->Key == AArch64PACKey::IB) &&
+ "Invalid auth call key");
MIB.addImm(Info.PAI->Key);
Register AddrDisc = 0;
diff --git a/llvm/test/CodeGen/AArch64/GlobalISel/ptrauth-invoke.ll
b/llvm/test/CodeGen/AArch64/GlobalISel/ptrauth-invoke.ll
deleted file mode 100644
index bd43776687f2e..0000000000000
--- a/llvm/test/CodeGen/AArch64/GlobalISel/ptrauth-invoke.ll
+++ /dev/null
@@ -1,183 +0,0 @@
-; RUN: llc -mtriple arm64e-apple-darwin -o - -global-isel -global-isel-abort=1
-verify-machineinstrs %s | FileCheck %s --check-prefixes=CHECK
-
-; CHECK-LABEL: _test_invoke_ia_0:
-; CHECK-NEXT: [[FNBEGIN:L.*]]:
-; CHECK-NEXT: .cfi_startproc
-; CHECK-NEXT: .cfi_personality 155, ___gxx_personality_v0
-; CHECK-NEXT: .cfi_lsda 16, [[EXCEPT:Lexception[0-9]+]]
-; CHECK-NEXT: ; %bb.0:
-; CHECK-NEXT: stp x20, x19, [sp, #-32]!
-; CHECK-NEXT: stp x29, x30, [sp, #16]
-; CHECK-NEXT: .cfi_def_cfa_offset 32
-; CHECK-NEXT: .cfi_offset w30, -8
-; CHECK-NEXT: .cfi_offset w29, -16
-; CHECK-NEXT: .cfi_offset w19, -24
-; CHECK-NEXT: .cfi_offset w20, -32
-; CHECK-NEXT: [[PRECALL:L.*]]:
-; CHECK-NEXT: blraaz x0
-; CHECK-NEXT: mov x19, x0
-; CHECK-NEXT: [[POSTCALL:L.*]]:
-; CHECK-NEXT: [[POSTCALL_BB:L.*]]:
-; CHECK-NEXT: bl _foo
-; CHECK-NEXT: mov x0, x19
-; CHECK-NEXT: ldp x29, x30, [sp, #16]
-; CHECK-NEXT: ldp x20, x19, [sp], #32
-; CHECK-NEXT: ret
-; CHECK-NEXT: [[LPADBB:LBB[0-9_]+]]:
-; CHECK-NEXT: [[LPAD:L.*]]:
-; CHECK-NEXT: mov w19, #-1
-; CHECK-NEXT: b [[POSTCALL_BB]]
-
-; CHECK-LABEL: GCC_except_table{{.*}}:
-; CHECK-NEXT: [[EXCEPT]]:
-; CHECK: .uleb128 [[POSTCALL]]-[[PRECALL]] ; Call between [[PRECALL]]
and [[POSTCALL]]
-; CHECK-NEXT: .uleb128 [[LPAD]]-[[FNBEGIN]] ; jumps to [[LPAD]]
-; CHECK-NEXT: .byte 0 ; On action: cleanup
-
-define i32 @test_invoke_ia_0(ptr %arg0) #0 personality ptr
@__gxx_personality_v0 {
- %tmp0 = invoke i32 %arg0() [ "ptrauth"(i32 0, i64 0) ] to label %continuebb
- unwind label %unwindbb
-
-unwindbb:
- %tmp1 = landingpad { ptr, i32 } cleanup
- call void @foo()
- ret i32 -1
-
-continuebb:
- call void @foo()
- ret i32 %tmp0
-}
-
-@_ZTIPKc = external constant ptr
-@hello_str = private unnamed_addr constant [6 x i8] c"hello\00", align 1
-
-; CHECK-LABEL: _test_invoke_ib_42_catch:
-; CHECK-NEXT: [[FNBEGIN:L.*]]:
-; CHECK-NEXT: .cfi_startproc
-; CHECK-NEXT: .cfi_personality 155, ___gxx_personality_v0
-; CHECK-NEXT: .cfi_lsda 16, [[EXCEPT:Lexception[0-9]+]]
-; CHECK-NEXT: ; %bb.0:
-; CHECK-NEXT: stp x20, x19, [sp, #-32]!
-; CHECK-NEXT: stp x29, x30, [sp, #16]
-; CHECK-NEXT: .cfi_def_cfa_offset 32
-; CHECK-NEXT: .cfi_offset w30, -8
-; CHECK-NEXT: .cfi_offset w29, -16
-; CHECK-NEXT: .cfi_offset w19, -24
-; CHECK-NEXT: .cfi_offset w20, -32
-; CHECK-NEXT: mov x19, x0
-; CHECK-NEXT: mov w0, #8
-; CHECK-NEXT: bl ___cxa_allocate_exception
-; CHECK-NEXT: Lloh{{.*}}:
-; CHECK-NEXT: adrp [[STR_TMP:x[0-9]+]], l_hello_str@PAGE
-; CHECK-NEXT: Lloh{{.*}}:
-; CHECK-NEXT: add [[STR:x[0-9]+]], [[STR_TMP]], l_hello_str@PAGEOFF
-; CHECK-NEXT: str [[STR]], [x0]
-; CHECK-NEXT: [[PRECALL:L.*]]:
-; CHECK-NEXT: Lloh{{.*}}:
-; CHECK-NEXT: adrp x[[ZTI_TMP:[0-9]+]], __ZTIPKc@GOTPAGE
-; CHECK-NEXT: Lloh{{.*}}:
-; CHECK-NEXT: ldr x1, [x[[ZTI_TMP]], __ZTIPKc@GOTPAGEOFF]
-; CHECK-NEXT: mov x2, #0
-; CHECK-NEXT: mov x17, #42
-; CHECK-NEXT: blrab x19, x17
-; CHECK-NEXT: [[POSTCALL:L.*]]:
-; CHECK-NEXT: ; %bb.1:
-; CHECK-NEXT: brk #0x1
-
-; CHECK-NEXT: [[LPADBB:LBB[0-9_]+]]:
-; CHECK-NEXT: [[LPAD:L.*]]:
-; CHECK-NEXT: mov x[[TMP:[0-9]+]], x1
-; CHECK-NEXT: bl ___cxa_begin_catch
-; CHECK-NEXT: cmp w[[TMP]], #2
-
-; CHECK-NEXT: b.ne [[EXITBB:LBB[0-9_]+]]
-; CHECK-NEXT: ; %bb.3:
-; CHECK-NEXT: bl _bar
-; CHECK-NEXT: [[EXITBB]]:
-; CHECK-NEXT: bl _foo
-; CHECK-NEXT: bl ___cxa_end_catch
-; CHECK-NEXT: ldp x29, x30, [sp, #16]
-; CHECK-NEXT: ldp x20, x19, [sp], #32 ; 16-byte Folded Reload
-; CHECK-NEXT: ret
-; CHECK-NEXT: .loh {{.*}}
-; CHECK-NEXT: .loh {{.*}}
-; CHECK-NEXT: [[FNEND:L.*]]:
-
-; CHECK-LABEL: GCC_except_table{{.*}}:
-; CHECK-NEXT: [[EXCEPT]]:
-; CHECK-NEXT: .byte 255 ; @LPStart Encoding =
omit
-; CHECK-NEXT: .byte 155 ; @TType Encoding =
indirect pcrel sdata4
-; CHECK-NEXT: .uleb128 [[TT:L.*]]-[[TTREF:L.*]]
-; CHECK-NEXT: [[TTREF]]:
-; CHECK-NEXT: .byte 1 ; Call site Encoding =
uleb128
-; CHECK-NEXT: .uleb128 [[CSEND:L.*]]-[[CSBEGIN:L.*]]
-; CHECK-NEXT: [[CSBEGIN]]:
-; CHECK-NEXT: .uleb128 [[FNBEGIN]]-[[FNBEGIN]] ; >> Call Site 1 <<
-; CHECK-NEXT: .uleb128 [[PRECALL]]-[[FNBEGIN]] ; Call between
[[FNBEGIN]] and [[PRECALL]]
-; CHECK-NEXT: .byte 0 ; has no landing
pad
-; CHECK-NEXT: .byte 0 ; On action: cleanup
-; CHECK-NEXT: .uleb128 [[PRECALL]]-[[FNBEGIN]] ; >> Call Site 2 <<
-; CHECK-NEXT: .uleb128 [[POSTCALL]]-[[PRECALL]] ; Call between
[[PRECALL]] and [[POSTCALL]]
-; CHECK-NEXT: .uleb128 [[LPAD]]-[[FNBEGIN]] ; jumps to [[LPAD]]
-; CHECK-NEXT: .byte 3 ; On action: 2
-; CHECK-NEXT: .uleb128 [[POSTCALL]]-[[FNBEGIN]] ; >> Call Site 3 <<
-; CHECK-NEXT: .uleb128 [[FNEND]]-[[POSTCALL]] ; Call between
[[POSTCALL]] and [[FNEND]]
-; CHECK-NEXT: .byte 0 ; has no landing
pad
-; CHECK-NEXT: .byte 0 ; On action: cleanup
-; CHECK-NEXT: [[CSEND]]:
-
-; CHECK-NEXT: .byte 1 ; >> Action Record 1 <<
-; CHECK-NEXT: ; Catch TypeInfo 1
-; CHECK-NEXT: .byte 0 ; No further actions
-; CHECK-NEXT: .byte 2 ; >> Action Record 2 <<
-; CHECK-NEXT: ; Catch TypeInfo 2
-; CHECK-NEXT: .byte 125 ; Continue to action 1
-; CHECK-NEXT: .p2align 2
-; CHECK-NEXT: ; >> Catch TypeInfos <<
-; CHECK-NEXT: [[TI:L.*]]: ; TypeInfo 2
-; CHECK-NEXT: .long __ZTIPKc@GOT-[[TI]]
-; CHECK-NEXT: .long 0 ; TypeInfo 1
-
-; CHECK-NEXT: [[TT]]:
-
-define void @test_invoke_ib_42_catch(ptr %fptr) #0 personality ptr
@__gxx_personality_v0 {
- %tmp0 = call ptr @__cxa_allocate_exception(i64 8)
- store ptr getelementptr inbounds ([6 x i8], ptr @hello_str, i64 0, i64 0),
ptr %tmp0, align 8
- invoke void %fptr(ptr %tmp0, ptr @_ZTIPKc, ptr null) [ "ptrauth"(i32 1, i64
42) ]
- to label %continuebb unwind label %catchbb
-
-catchbb:
- %tmp2 = landingpad { ptr, i32 }
- catch ptr @_ZTIPKc
- catch ptr null
- %tmp3 = extractvalue { ptr, i32 } %tmp2, 0
- %tmp4 = extractvalue { ptr, i32 } %tmp2, 1
- %tmp5 = call i32 @llvm.eh.typeid.for(ptr @_ZTIPKc)
- %tmp6 = icmp eq i32 %tmp4, %tmp5
- %tmp7 = call ptr @__cxa_begin_catch(ptr %tmp3)
- br i1 %tmp6, label %PKc_catchbb, label %any_catchbb
-
-PKc_catchbb:
- call void @bar(ptr %tmp7)
- br label %any_catchbb
-
-any_catchbb:
- call void @foo()
- call void @__cxa_end_catch()
- ret void
-
-continuebb:
- unreachable
-}
-
-declare void @foo()
-declare void @bar(ptr)
-
-declare i32 @__gxx_personality_v0(...)
-declare ptr @__cxa_allocate_exception(i64)
-declare void @__cxa_throw(ptr, ptr, ptr)
-declare i32 @llvm.eh.typeid.for(ptr)
-declare ptr @__cxa_begin_catch(ptr)
-declare void @__cxa_end_catch()
-
-attributes #0 = { nounwind }
diff --git a/llvm/test/CodeGen/AArch64/ptrauth-invoke.ll
b/llvm/test/CodeGen/AArch64/ptrauth-invoke.ll
index bea699dbee37a..fcd0ddb788336 100644
--- a/llvm/test/CodeGen/AArch64/ptrauth-invoke.ll
+++ b/llvm/test/CodeGen/AArch64/ptrauth-invoke.ll
@@ -1,40 +1,86 @@
-; RUN: llc -mtriple arm64e-apple-darwin -o - %s | FileCheck %s
--check-prefixes=CHECK,SDAG
-; RUN: llc -mtriple arm64e-apple-darwin -fast-isel -o - %s | FileCheck %s
--check-prefixes=CHECK,FISEL
-
-; CHECK-LABEL: _test_invoke_ia_0:
-; CHECK-NEXT: [[FNBEGIN:L.*]]:
-; CHECK-NEXT: .cfi_startproc
-; CHECK-NEXT: .cfi_personality 155, ___gxx_personality_v0
-; CHECK-NEXT: .cfi_lsda 16, [[EXCEPT:Lexception[0-9]+]]
-; CHECK-NEXT: ; %bb.0:
-; CHECK-NEXT: stp x20, x19, [sp, #-32]!
-; CHECK-NEXT: stp x29, x30, [sp, #16]
-; CHECK-NEXT: .cfi_def_cfa_offset 32
-; CHECK-NEXT: .cfi_offset w30, -8
-; CHECK-NEXT: .cfi_offset w29, -16
-; CHECK-NEXT: .cfi_offset w19, -24
-; CHECK-NEXT: .cfi_offset w20, -32
-; CHECK-NEXT: [[PRECALL:L.*]]:
-; CHECK-NEXT: blraaz x0
-; CHECK-NEXT: [[POSTCALL:L.*]]:
-; CHECK-NEXT: ; %bb.1:
-; CHECK-NEXT: mov x19, x0
-; CHECK-NEXT: [[CALLBB:L.*]]:
-; CHECK-NEXT: bl _foo
-; CHECK-NEXT: mov x0, x19
-; CHECK-NEXT: ldp x29, x30, [sp, #16]
-; CHECK-NEXT: ldp x20, x19, [sp], #32
-; CHECK-NEXT: ret
-; CHECK-NEXT: [[LPADBB:LBB[0-9_]+]]:
-; CHECK-NEXT: [[LPAD:L.*]]:
-; CHECK-NEXT: mov w19, #-1
-; CHECK-NEXT: b [[CALLBB]]
+; RUN: llc -mtriple arm64e-apple-darwin -o - %s \
+; RUN: | FileCheck %s --check-prefixes=CHECK,DARWIN,DARWIN-SDAG
+
+; RUN: llc -mtriple aarch64 -mattr=+pauth -o - %s \
+; RUN: | FileCheck %s --check-prefixes=CHECK,ELF,ELF-SDAG
+
+; RUN: llc -mtriple arm64e-apple-darwin -o - %s \
+; RUN: -global-isel -global-isel-abort=1 -verify-machineinstrs \
+; RUN: | FileCheck %s --check-prefixes=CHECK,DARWIN,DARWIN-GISEL
+
+; RUN: llc -mtriple aarch64 -mattr=+pauth -o - %s \
+; RUN: -global-isel -global-isel-abort=1 -verify-machineinstrs \
+; RUN: | FileCheck %s --check-prefixes=CHECK,ELF,ELF-GISEL
+
+; DARWIN-LABEL: _test_invoke_ia_0:
+; DARWIN-NEXT: [[FNBEGIN:L.*]]:
+; DARWIN-NEXT: .cfi_startproc
+; DARWIN-NEXT: .cfi_personality 155, ___gxx_personality_v0
+; DARWIN-NEXT: .cfi_lsda 16, [[EXCEPT:Lexception[0-9]+]]
+; DARWIN-NEXT: ; %bb.0:
+; DARWIN-NEXT: stp x20, x19, [sp, #-32]!
+; DARWIN-NEXT: stp x29, x30, [sp, #16]
+; DARWIN-NEXT: .cfi_def_cfa_offset 32
+; DARWIN-NEXT: .cfi_offset w30, -8
+; DARWIN-NEXT: .cfi_offset w29, -16
+; DARWIN-NEXT: .cfi_offset w19, -24
+; DARWIN-NEXT: .cfi_offset w20, -32
+; DARWIN-NEXT: [[PRECALL:L.*]]:
+; DARWIN-NEXT: blraaz x0
+
+; DARWIN-SDAG-NEXT: [[POSTCALL:L.*]]:
+; DARWIN-SDAG-NEXT: ; %bb.1:
+; DARWIN-SDAG-NEXT: mov x19, x0
+
+; DARWIN-GISEL-NEXT: mov x19, x0
+; DARWIN-GISEL-NEXT: [[POSTCALL:L.*]]:
+
+; DARWIN-NEXT: [[CALLBB:L.*]]:
+; DARWIN-NEXT: bl _foo
+; DARWIN-NEXT: mov x0, x19
+; DARWIN-NEXT: ldp x29, x30, [sp, #16]
+; DARWIN-NEXT: ldp x20, x19, [sp], #32
+; DARWIN-NEXT: ret
+; DARWIN-NEXT: [[LPADBB:LBB[0-9_]+]]:
+; DARWIN-NEXT: [[LPAD:L.*]]:
+; DARWIN-NEXT: mov w19, #-1
+; DARWIN-NEXT: b [[CALLBB]]
+
+; ELF-LABEL: test_invoke_ia_0:
+; ELF-NEXT: [[FNBEGIN:.L.*]]:
+; ELF-NEXT: .cfi_startproc
+; ELF-NEXT: .cfi_personality 156, DW.ref.__gxx_personality_v0
+; ELF-NEXT: .cfi_lsda 28, [[EXCEPT:.Lexception[0-9]+]]
+; ELF-NEXT: // %bb.0:
+; ELF-NEXT: stp x30, x19, [sp, #-16]!
+; ELF-NEXT: .cfi_def_cfa_offset 16
+; ELF-NEXT: .cfi_offset w19, -8
+; ELF-NEXT: .cfi_offset w30, -16
+; ELF-NEXT: [[PRECALL:.L.*]]:
+; ELF-NEXT: blraaz x0
+
+; ELF-SDAG-NEXT: [[POSTCALL:.L.*]]:
+; ELF-SDAG-NEXT: // %bb.1:
+; ELF-SDAG-NEXT: mov w19, w0
+
+; ELF-GISEL-NEXT: mov w19, w0
+; ELF-GISEL-NEXT: [[POSTCALL:.L.*]]:
+
+; ELF-NEXT: [[CALLBB:.L.*]]:
+; ELF-NEXT: bl foo
+; ELF-NEXT: mov w0, w19
+; ELF-NEXT: ldp x30, x19, [sp], #16
+; ELF-NEXT: ret
+; ELF-NEXT: [[LPADBB:.LBB[0-9_]+]]:
+; ELF-NEXT: [[LPAD:.L.*]]:
+; ELF-NEXT: mov w19, #-1
+; ELF-NEXT: b [[CALLBB]]
; CHECK-LABEL: GCC_except_table{{.*}}:
; CHECK-NEXT: [[EXCEPT]]:
-; CHECK: .uleb128 [[POSTCALL]]-[[PRECALL]] ; Call between [[PRECALL]]
and [[POSTCALL]]
-; CHECK-NEXT: .uleb128 [[LPAD]]-[[FNBEGIN]] ; jumps to [[LPAD]]
-; CHECK-NEXT: .byte 0 ; On action: cleanup
+; CHECK: .uleb128 [[POSTCALL]]-[[PRECALL]] {{.*}} Call between
[[PRECALL]] and [[POSTCALL]]
+; CHECK-NEXT: .uleb128 [[LPAD]]-[[FNBEGIN]] {{.*}} jumps to [[LPAD]]
+; CHECK-NEXT: .byte 0 {{.*}} On action: cleanup
define i32 @test_invoke_ia_0(ptr %arg0) #0 personality ptr
@__gxx_personality_v0 {
%tmp0 = invoke i32 %arg0() [ "ptrauth"(i32 0, i64 0) ] to label %continuebb
@@ -53,99 +99,140 @@ continuebb:
@_ZTIPKc = external constant ptr
@hello_str = private unnamed_addr constant [6 x i8] c"hello\00", align 1
-; CHECK-LABEL: _test_invoke_ib_42_catch:
-; CHECK-NEXT: [[FNBEGIN:L.*]]:
-; CHECK-NEXT: .cfi_startproc
-; CHECK-NEXT: .cfi_personality 155, ___gxx_personality_v0
-; CHECK-NEXT: .cfi_lsda 16, [[EXCEPT:Lexception[0-9]+]]
-; CHECK-NEXT: ; %bb.0:
-; CHECK-NEXT: stp x20, x19, [sp, #-32]!
-; CHECK-NEXT: stp x29, x30, [sp, #16]
-; CHECK-NEXT: .cfi_def_cfa_offset 32
-; CHECK-NEXT: .cfi_offset w30, -8
-; CHECK-NEXT: .cfi_offset w29, -16
-; CHECK-NEXT: .cfi_offset w19, -24
-; CHECK-NEXT: .cfi_offset w20, -32
-; CHECK-NEXT: mov x19, x0
-; CHECK-NEXT: mov w0, #8
-; CHECK-NEXT: bl ___cxa_allocate_exception
-; CHECK-NEXT: Lloh{{.*}}:
-; CHECK-NEXT: adrp x8, l_hello_str@PAGE
-; CHECK-NEXT: Lloh{{.*}}:
-; CHECK-NEXT: add x8, x8, l_hello_str@PAGEOFF
-; CHECK-NEXT: str x8, [x0]
-; CHECK-NEXT: [[PRECALL:L.*]]:
-; CHECK-NEXT: Lloh{{.*}}:
-; CHECK-NEXT: adrp x1, __ZTIPKc@GOTPAGE
-; CHECK-NEXT: Lloh{{.*}}:
-; CHECK-NEXT: ldr x1, [x1, __ZTIPKc@GOTPAGEOFF]
-; CHECK-NEXT: mov x2, #0
-; CHECK-NEXT: mov x17, #42
-; CHECK-NEXT: blrab x19, x17
-; CHECK-NEXT: [[POSTCALL:L.*]]:
-; CHECK-NEXT: ; %bb.1:
-; CHECK-NEXT: brk #0x1
-; CHECK-NEXT: [[LPADBB:LBB[0-9_]+]]:
-; CHECK-NEXT: [[LPAD:L.*]]:
-; CHECK-NEXT: mov x19, x1
-
-; SDAG-NEXT: bl ___cxa_begin_catch
-; SDAG-NEXT: cmp w19, #2
-
-; FISEL-NEXT: mov w20, #2
-; FISEL-NEXT: bl ___cxa_begin_catch
-; FISEL-NEXT: cmp w19, w20
-
-; CHECK-NEXT: b.ne [[EXITBB:LBB[0-9_]+]]
-; CHECK-NEXT: ; %bb.3:
-; CHECK-NEXT: bl _bar
-; CHECK-NEXT: [[EXITBB]]:
-; CHECK-NEXT: bl _foo
-; CHECK-NEXT: bl ___cxa_end_catch
-; CHECK-NEXT: ldp x29, x30, [sp, #16]
-; CHECK-NEXT: ldp x20, x19, [sp], #32
-; CHECK-NEXT: ret
-; CHECK-NEXT: .loh {{.*}}
-; CHECK-NEXT: .loh {{.*}}
-; CHECK-NEXT: [[FNEND:L.*]]:
+; DARWIN-LABEL: _test_invoke_ib_42_catch:
+; DARWIN-NEXT: [[FNBEGIN:L.*]]:
+; DARWIN-NEXT: .cfi_startproc
+; DARWIN-NEXT: .cfi_personality 155, ___gxx_personality_v0
+; DARWIN-NEXT: .cfi_lsda 16, [[EXCEPT:Lexception[0-9]+]]
+; DARWIN-NEXT: ; %bb.0:
+; DARWIN-NEXT: stp x20, x19, [sp, #-32]!
+; DARWIN-NEXT: stp x29, x30, [sp, #16]
+; DARWIN-NEXT: .cfi_def_cfa_offset 32
+; DARWIN-NEXT: .cfi_offset w30, -8
+; DARWIN-NEXT: .cfi_offset w29, -16
+; DARWIN-NEXT: .cfi_offset w19, -24
+; DARWIN-NEXT: .cfi_offset w20, -32
+; DARWIN-NEXT: mov x19, x0
+; DARWIN-NEXT: mov w0, #8
+; DARWIN-NEXT: bl ___cxa_allocate_exception
+; DARWIN-NEXT: Lloh{{.*}}:
+; DARWIN-NEXT: adrp x8, l_hello_str@PAGE
+; DARWIN-NEXT: Lloh{{.*}}:
+; DARWIN-NEXT: add x8, x8, l_hello_str@PAGEOFF
+; DARWIN-NEXT: str x8, [x0]
+; DARWIN-NEXT: [[PRECALL:L.*]]:
+; DARWIN-NEXT: Lloh{{.*}}:
+; DARWIN-NEXT: adrp x1, __ZTIPKc@GOTPAGE
+; DARWIN-NEXT: Lloh{{.*}}:
+; DARWIN-NEXT: ldr x1, [x1, __ZTIPKc@GOTPAGEOFF]
+; DARWIN-NEXT: mov x2, #0
+; DARWIN-NEXT: mov x17, #42
+; DARWIN-NEXT: blrab x19, x17
+; DARWIN-NEXT: [[POSTCALL:L.*]]:
+; DARWIN-NEXT: ; %bb.1:
+; DARWIN-NEXT: brk #0x1
+; DARWIN-NEXT: [[LPADBB:LBB[0-9_]+]]:
+; DARWIN-NEXT: [[LPAD:L.*]]:
+; DARWIN-NEXT: mov x19, x1
+; DARWIN-NEXT: bl ___cxa_begin_catch
+; DARWIN-NEXT: cmp w19, #2
+; DARWIN-NEXT: b.ne [[EXITBB:LBB[0-9_]+]]
+; DARWIN-NEXT: ; %bb.3:
+; DARWIN-NEXT: bl _bar
+; DARWIN-NEXT: [[EXITBB]]:
+; DARWIN-NEXT: bl _foo
+; DARWIN-NEXT: bl ___cxa_end_catch
+; DARWIN-NEXT: ldp x29, x30, [sp, #16]
+; DARWIN-NEXT: ldp x20, x19, [sp], #32
+; DARWIN-NEXT: ret
+; DARWIN-NEXT: .loh {{.*}}
+; DARWIN-NEXT: .loh {{.*}}
+; DARWIN-NEXT: [[FNEND:L.*]]:
+
+; ELF-LABEL: test_invoke_ib_42_catch:
+; ELF-NEXT: [[FNBEGIN:.L.*]]:
+; ELF-NEXT: .cfi_startproc
+; ELF-NEXT: .cfi_personality 156, DW.ref.__gxx_personality_v0
+; ELF-NEXT: .cfi_lsda 28, [[EXCEPT:.Lexception[0-9]+]]
+; ELF-NEXT: // %bb.0:
+; ELF-NEXT: stp x30, x19, [sp, #-16]!
+; ELF-NEXT: .cfi_def_cfa_offset 16
+; ELF-NEXT: .cfi_offset w19, -8
+; ELF-NEXT: .cfi_offset w30, -16
+; ELF-NEXT: mov x19, x0
+; ELF-NEXT: mov w0, #8
+; ELF-NEXT: bl __cxa_allocate_exception
+; ELF-NEXT: adrp x8, .Lhello_str
+; ELF-NEXT: add x8, x8, :lo12:.Lhello_str
+; ELF-NEXT: str x8, [x0]
+; ELF-NEXT: [[PRECALL:.L.*]]:
+; ELF-NEXT: adrp x1, :got:_ZTIPKc
+; ELF-NEXT: mov x2, xzr
+; ELF-NEXT: ldr x1, [x1, :got_lo12:_ZTIPKc]
+; ELF-NEXT: mov x17, #42
+; ELF-NEXT: blrab x19, x17
+; ELF-NEXT: [[POSTCALL:.L.*]]:
+; ELF-NEXT: // %bb.1:
+; ELF-NEXT: [[LPADBB:.LBB[0-9_]+]]:
+; ELF-NEXT: [[LPAD:.L.*]]:
+; ELF-NEXT: mov x19, x1
+; ELF-NEXT: bl __cxa_begin_catch
+; ELF-NEXT: cmp w19, #2
+; ELF-NEXT: b.ne [[EXITBB:.LBB[0-9_]+]]
+; ELF-NEXT: // %bb.3:
+; ELF-NEXT: bl bar
+; ELF-NEXT: [[EXITBB]]:
+; ELF-NEXT: bl foo
+; ELF-NEXT: bl __cxa_end_catch
+; ELF-NEXT: ldp x30, x19, [sp], #16
+; ELF-NEXT: ret
+; ELF-NEXT: [[FNEND:.L.*]]:
; CHECK-LABEL: GCC_except_table{{.*}}:
; CHECK-NEXT: [[EXCEPT]]:
-; CHECK-NEXT: .byte 255 ; @LPStart Encoding =
omit
-; CHECK-NEXT: .byte 155 ; @TType Encoding =
indirect pcrel sdata4
-; CHECK-NEXT: .uleb128 [[TT:L.*]]-[[TTREF:L.*]]
+; CHECK-NEXT: .byte 255 {{.*}} @LPStart Encoding =
omit
+; DARWIN-NEXT: .byte 155 {{.*}} @TType Encoding =
indirect pcrel sdata4
+; ELF-NEXT: .byte 156 {{.*}} @TType Encoding =
indirect pcrel sdata8
+; CHECK-NEXT: .uleb128 [[TT:.?L.*]]-[[TTREF:.?L.*]]
; CHECK-NEXT: [[TTREF]]:
-; CHECK-NEXT: .byte 1 ; Call site Encoding =
uleb128
-; CHECK-NEXT: .uleb128 [[CSEND:L.*]]-[[CSBEGIN:L.*]]
+; CHECK-NEXT: .byte 1 {{.*}} Call site Encoding =
uleb128
+; CHECK-NEXT: .uleb128 [[CSEND:.?L.*]]-[[CSBEGIN:.?L.*]]
; CHECK-NEXT: [[CSBEGIN]]:
-; CHECK-NEXT: .uleb128 [[FNBEGIN]]-[[FNBEGIN]] ; >> Call Site 1 <<
-; CHECK-NEXT: .uleb128 [[PRECALL]]-[[FNBEGIN]] ; Call between
[[FNBEGIN]] and [[PRECALL]]
-; CHECK-NEXT: .byte 0 ; has no landing
pad
-; CHECK-NEXT: .byte 0 ; On action: cleanup
-; CHECK-NEXT: .uleb128 [[PRECALL]]-[[FNBEGIN]] ; >> Call Site 2 <<
-; CHECK-NEXT: .uleb128 [[POSTCALL]]-[[PRECALL]] ; Call between
[[PRECALL]] and [[POSTCALL]]
-; CHECK-NEXT: .uleb128 [[LPAD]]-[[FNBEGIN]] ; jumps to [[LPAD]]
-; CHECK-NEXT: .byte 3 ; On action: 2
-; CHECK-NEXT: .uleb128 [[POSTCALL]]-[[FNBEGIN]] ; >> Call Site 3 <<
-; CHECK-NEXT: .uleb128 [[FNEND]]-[[POSTCALL]] ; Call between
[[POSTCALL]] and [[FNEND]]
-; CHECK-NEXT: .byte 0 ; has no landing
pad
-; CHECK-NEXT: .byte 0 ; On action: cleanup
+; CHECK-NEXT: .uleb128 [[FNBEGIN]]-[[FNBEGIN]] {{.*}} >> Call Site 1 <<
+; CHECK-NEXT: .uleb128 [[PRECALL]]-[[FNBEGIN]] {{.*}} Call between
[[FNBEGIN]] and [[PRECALL]]
+; CHECK-NEXT: .byte 0 {{.*}} has no landing pad
+; CHECK-NEXT: .byte 0 {{.*}} On action: cleanup
+; CHECK-NEXT: .uleb128 [[PRECALL]]-[[FNBEGIN]] {{.*}} >> Call Site 2 <<
+; CHECK-NEXT: .uleb128 [[POSTCALL]]-[[PRECALL]] {{.*}} Call between
[[PRECALL]] and [[POSTCALL]]
+; CHECK-NEXT: .uleb128 [[LPAD]]-[[FNBEGIN]] {{.*}} jumps to [[LPAD]]
+; CHECK-NEXT: .byte 3 {{.*}} On action: 2
+; CHECK-NEXT: .uleb128 [[POSTCALL]]-[[FNBEGIN]] {{.*}} >> Call Site 3 <<
+; CHECK-NEXT: .uleb128 [[FNEND]]-[[POSTCALL]] {{.*}} Call between
[[POSTCALL]] and [[FNEND]]
+; CHECK-NEXT: .byte 0 {{.*}} has no landing pad
+; CHECK-NEXT: .byte 0 {{.*}} On action: cleanup
; CHECK-NEXT: [[CSEND]]:
-; CHECK-NEXT: .byte 1 ; >> Action Record 1 <<
-; CHECK-NEXT: ; Catch TypeInfo 1
-; CHECK-NEXT: .byte 0 ; No further actions
-; CHECK-NEXT: .byte 2 ; >> Action Record 2 <<
-; CHECK-NEXT: ; Catch TypeInfo 2
-; CHECK-NEXT: .byte 125 ; Continue to action 1
-; CHECK-NEXT: .p2align 2
-; CHECK-NEXT: ; >> Catch TypeInfos <<
-; CHECK-NEXT: [[TI:L.*]]: ; TypeInfo 2
-; CHECK-NEXT: .long __ZTIPKc@GOT-[[TI]]
-; CHECK-NEXT: .long 0 ; TypeInfo 1
+; CHECK-NEXT: .byte 1 {{.*}} >> Action Record 1 <<
+; CHECK-NEXT: {{.*}} Catch TypeInfo 1
+; CHECK-NEXT: .byte 0 {{.*}} No further actions
+; CHECK-NEXT: .byte 2 {{.*}} >> Action Record 2 <<
+; CHECK-NEXT: {{.*}} Catch TypeInfo 2
+; CHECK-NEXT: .byte 125 {{.*}} Continue to action 1
+; CHECK-NEXT: .p2align 2
+; CHECK-NEXT: {{.*}} >> Catch TypeInfos <<
+
+; DARWIN-NEXT: [[TI:L.*]]: {{.*}} TypeInfo 2
+; DARWIN-NEXT: .long __ZTIPKc@GOT-[[TI]]
+; DARWIN-NEXT: .long 0 {{.*}} TypeInfo 1
+; ELF-NEXT: [[TI:.?L.*]]: {{.*}} TypeInfo 2
+; ELF-NEXT: .xword .L_ZTIPKc.DW.stub-[[TI]]
+; ELF-NEXT: .xword 0 {{.*}} TypeInfo 1
; CHECK-NEXT: [[TT]]:
+; ELF-LABEL: .L_ZTIPKc.DW.stub:
+; ELF-NEXT: .xword _ZTIPKc
+
define void @test_invoke_ib_42_catch(ptr %fptr) #0 personality ptr
@__gxx_personality_v0 {
%tmp0 = call ptr @__cxa_allocate_exception(i64 8)
store ptr getelementptr inbounds ([6 x i8], ptr @hello_str, i64 0, i64 0),
ptr %tmp0, align 8
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