Author: dim Date: Mon Jan 26 21:24:04 2015 New Revision: 277776 URL: https://svnweb.freebsd.org/changeset/base/277776
Log: Add llvm and clang patches corresponding to r277774 and r277775. Added: head/contrib/llvm/patches/patch-29-llvm-r226664-aarch64-x18.diff head/contrib/llvm/patches/patch-30-clang-r227062-fixes-x18.diff Added: head/contrib/llvm/patches/patch-29-llvm-r226664-aarch64-x18.diff ============================================================================== --- /dev/null 00:00:00 1970 (empty, because file is newly added) +++ head/contrib/llvm/patches/patch-29-llvm-r226664-aarch64-x18.diff Mon Jan 26 21:24:04 2015 (r277776) @@ -0,0 +1,83 @@ +Pull in r226664 from upstream llvm trunk (by Tim Northover): + + AArch64: add backend option to reserve x18 (platform register) + + AAPCS64 says that it's up to the platform to specify whether x18 is + reserved, and a first step on that way is to add a flag controlling + it. + + From: Andrew Turner <and...@fubar.geek.nz> + +Introduced here: http://svnweb.freebsd.org/changeset/base/277774 + +Index: lib/Target/AArch64/AArch64RegisterInfo.cpp +=================================================================== +--- lib/Target/AArch64/AArch64RegisterInfo.cpp ++++ lib/Target/AArch64/AArch64RegisterInfo.cpp +@@ -33,6 +33,10 @@ using namespace llvm; + #define GET_REGINFO_TARGET_DESC + #include "AArch64GenRegisterInfo.inc" + ++static cl::opt<bool> ++ReserveX18("aarch64-reserve-x18", cl::Hidden, ++ cl::desc("Reserve X18, making it unavailable as GPR")); ++ + AArch64RegisterInfo::AArch64RegisterInfo(const AArch64InstrInfo *tii, + const AArch64Subtarget *sti) + : AArch64GenRegisterInfo(AArch64::LR), TII(tii), STI(sti) {} +@@ -90,7 +94,7 @@ AArch64RegisterInfo::getReservedRegs(const Machine + Reserved.set(AArch64::W29); + } + +- if (STI->isTargetDarwin()) { ++ if (STI->isTargetDarwin() || ReserveX18) { + Reserved.set(AArch64::X18); // Platform register + Reserved.set(AArch64::W18); + } +@@ -117,7 +121,7 @@ bool AArch64RegisterInfo::isReservedReg(const Mach + return true; + case AArch64::X18: + case AArch64::W18: +- return STI->isTargetDarwin(); ++ return STI->isTargetDarwin() || ReserveX18; + case AArch64::FP: + case AArch64::W29: + return TFI->hasFP(MF) || STI->isTargetDarwin(); +@@ -379,7 +383,7 @@ unsigned AArch64RegisterInfo::getRegPressureLimit( + case AArch64::GPR64commonRegClassID: + return 32 - 1 // XZR/SP + - (TFI->hasFP(MF) || STI->isTargetDarwin()) // FP +- - STI->isTargetDarwin() // X18 reserved as platform register ++ - (STI->isTargetDarwin() || ReserveX18) // X18 reserved as platform register + - hasBasePointer(MF); // X19 + case AArch64::FPR8RegClassID: + case AArch64::FPR16RegClassID: +Index: test/CodeGen/AArch64/arm64-platform-reg.ll +=================================================================== +--- test/CodeGen/AArch64/arm64-platform-reg.ll ++++ test/CodeGen/AArch64/arm64-platform-reg.ll +@@ -1,4 +1,5 @@ +-; RUN: llc -mtriple=arm64-apple-ios -o - %s | FileCheck %s --check-prefix=CHECK-DARWIN ++; RUN: llc -mtriple=arm64-apple-ios -o - %s | FileCheck %s --check-prefix=CHECK-RESERVE-X18 ++; RUN: llc -mtriple=arm64-freebsd-gnu -aarch64-reserve-x18 -o - %s | FileCheck %s --check-prefix=CHECK-RESERVE-X18 + ; RUN: llc -mtriple=arm64-linux-gnu -o - %s | FileCheck %s + + ; x18 is reserved as a platform register on Darwin but not on other +@@ -16,11 +17,11 @@ define void @keep_live() { + ; CHECK: ldr x18 + ; CHECK: str x18 + +-; CHECK-DARWIN-NOT: ldr fp +-; CHECK-DARWIN-NOT: ldr x18 +-; CHECK-DARWIN: Spill +-; CHECK-DARWIN-NOT: ldr fp +-; CHECK-DARWIN-NOT: ldr x18 +-; CHECK-DARWIN: ret ++; CHECK-RESERVE-X18-NOT: ldr fp ++; CHECK-RESERVE-X18-NOT: ldr x18 ++; CHECK-RESERVE-X18: Spill ++; CHECK-RESERVE-X18-NOT: ldr fp ++; CHECK-RESERVE-X18-NOT: ldr x18 ++; CHECK-RESERVE-X18: ret + ret void + } Added: head/contrib/llvm/patches/patch-30-clang-r227062-fixes-x18.diff ============================================================================== --- /dev/null 00:00:00 1970 (empty, because file is newly added) +++ head/contrib/llvm/patches/patch-30-clang-r227062-fixes-x18.diff Mon Jan 26 21:24:04 2015 (r277776) @@ -0,0 +1,54 @@ +Pull in r227062 from upstream clang trunk (by Renato Golin): + + Allows Clang to use LLVM's fixes-x18 option + + This patch allows clang to have llvm reserve the x18 + platform register on AArch64. FreeBSD will use this in the kernel for + per-cpu data but has no need to reserve this register in userland so + will need this flag to reserve it. + + This uses llvm r226664 to allow this register to be reserved. + + Patch by Andrew Turner. + +Introduced here: http://svnweb.freebsd.org/changeset/base/277775 + +Index: tools/clang/include/clang/Driver/Options.td +=================================================================== +--- tools/clang/include/clang/Driver/Options.td ++++ tools/clang/include/clang/Driver/Options.td +@@ -1141,6 +1141,9 @@ def mno_long_calls : Flag<["-"], "mno-long-calls"> + def mgeneral_regs_only : Flag<["-"], "mgeneral-regs-only">, Group<m_aarch64_Features_Group>, + HelpText<"Generate code which only uses the general purpose registers (AArch64 only)">; + ++def ffixed_x18 : Flag<["-"], "ffixed-x18">, Group<m_aarch64_Features_Group>, ++ HelpText<"Reserve the x18 register (AArch64 only)">; ++ + def mvsx : Flag<["-"], "mvsx">, Group<m_ppc_Features_Group>; + def mno_vsx : Flag<["-"], "mno-vsx">, Group<m_ppc_Features_Group>; + def mfprnd : Flag<["-"], "mfprnd">, Group<m_ppc_Features_Group>; +Index: tools/clang/lib/Driver/Tools.cpp +=================================================================== +--- tools/clang/lib/Driver/Tools.cpp ++++ tools/clang/lib/Driver/Tools.cpp +@@ -887,6 +887,11 @@ void Clang::AddAArch64TargetArgs(const ArgList &Ar + if (A->getOption().matches(options::OPT_mno_global_merge)) + CmdArgs.push_back("-mno-global-merge"); + } ++ ++ if (Args.hasArg(options::OPT_ffixed_x18)) { ++ CmdArgs.push_back("-backend-option"); ++ CmdArgs.push_back("-aarch64-reserve-x18"); ++ } + } + + // Get CPU and ABI names. They are not independent +Index: tools/clang/test/Driver/aarch64-fixed-x18.c +=================================================================== +--- tools/clang/test/Driver/aarch64-fixed-x18.c ++++ tools/clang/test/Driver/aarch64-fixed-x18.c +@@ -0,0 +1,4 @@ ++// RUN: %clang -target aarch64-none-gnu -ffixed-x18 -### %s 2> %t ++// RUN: FileCheck --check-prefix=CHECK-FIXED-X18 < %t %s ++ ++// CHECK-FIXED-X18: "-backend-option" "-aarch64-reserve-x18" _______________________________________________ svn-src-head@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/svn-src-head To unsubscribe, send any mail to "svn-src-head-unsubscr...@freebsd.org"