koriakin created this revision.
koriakin added reviewers: uweigand, rjmccall.
koriakin added a subscriber: cfe-commits.
koriakin set the repository for this revision to rL LLVM.
koriakin added a dependency: D19889: [SystemZ] Implement backchain attribute..
This option, like the corresponding gcc option, is SystemZ-specific and
enables storing frame backchain links, as specified in the ABI.
Depends on D19889.
Repository:
rL LLVM
http://reviews.llvm.org/D19891
Files:
include/clang/Driver/Options.td
include/clang/Frontend/CodeGenOptions.def
lib/CodeGen/CGCall.cpp
lib/Driver/Tools.cpp
lib/Frontend/CompilerInvocation.cpp
test/CodeGen/mbackchain-2.c
test/CodeGen/mbackchain-3.c
test/CodeGen/mbackchain.c
Index: test/CodeGen/mbackchain.c
===================================================================
--- /dev/null
+++ test/CodeGen/mbackchain.c
@@ -0,0 +1,7 @@
+// RUN: %clang_cc1 -mbackchain -triple s390x-linux -emit-llvm -o - %s | FileCheck %s
+
+// CHECK: define void @foo() [[NUW:#[0-9]+]]
+void foo(void) {
+}
+
+// CHECK: attributes [[NUW]] = { {{.*}} "backchain" {{.*}} }
Index: test/CodeGen/mbackchain-3.c
===================================================================
--- /dev/null
+++ test/CodeGen/mbackchain-3.c
@@ -0,0 +1,7 @@
+// RUN: %clang -mno-backchain --target=s390x-linux -S -emit-llvm -o - %s | FileCheck %s
+
+// CHECK: define void @foo() [[NUW:#[0-9]+]]
+void foo(void) {
+}
+
+// CHECK-NOT: "backchain"
Index: test/CodeGen/mbackchain-2.c
===================================================================
--- /dev/null
+++ test/CodeGen/mbackchain-2.c
@@ -0,0 +1,7 @@
+// RUN: %clang -mbackchain --target=s390x-linux -S -emit-llvm -o - %s | FileCheck %s
+
+// CHECK: define void @foo() [[NUW:#[0-9]+]]
+void foo(void) {
+}
+
+// CHECK: attributes [[NUW]] = { {{.*}} "backchain" {{.*}} }
Index: lib/Frontend/CompilerInvocation.cpp
===================================================================
--- lib/Frontend/CompilerInvocation.cpp
+++ lib/Frontend/CompilerInvocation.cpp
@@ -782,6 +782,8 @@
Opts.CudaGpuBinaryFileNames =
Args.getAllArgValues(OPT_fcuda_include_gpubinary);
+ Opts.Backchain = Args.hasArg(OPT_mbackchain);
+
return Success;
}
Index: lib/Driver/Tools.cpp
===================================================================
--- lib/Driver/Tools.cpp
+++ lib/Driver/Tools.cpp
@@ -1655,6 +1655,12 @@
}
}
+void Clang::AddSystemZTargetArgs(const ArgList &Args,
+ ArgStringList &CmdArgs) const {
+ if (Args.hasFlag(options::OPT_mbackchain, options::OPT_mno_backchain, false))
+ CmdArgs.push_back("-mbackchain");
+}
+
static const char *getSystemZTargetCPU(const ArgList &Args) {
if (const Arg *A = Args.getLastArg(options::OPT_march_EQ))
return A->getValue();
@@ -4241,6 +4247,10 @@
AddSparcTargetArgs(Args, CmdArgs);
break;
+ case llvm::Triple::systemz:
+ AddSystemZTargetArgs(Args, CmdArgs);
+ break;
+
case llvm::Triple::x86:
case llvm::Triple::x86_64:
AddX86TargetArgs(Args, CmdArgs);
Index: lib/CodeGen/CGCall.cpp
===================================================================
--- lib/CodeGen/CGCall.cpp
+++ lib/CodeGen/CGCall.cpp
@@ -1714,6 +1714,8 @@
if (CodeGenOpts.StackRealignment)
FuncAttrs.addAttribute("stackrealign");
+ if (CodeGenOpts.Backchain)
+ FuncAttrs.addAttribute("backchain");
// Add target-cpu and target-features attributes to functions. If
// we have a decl for the function and it has a target attribute then
Index: include/clang/Frontend/CodeGenOptions.def
===================================================================
--- include/clang/Frontend/CodeGenOptions.def
+++ include/clang/Frontend/CodeGenOptions.def
@@ -34,6 +34,7 @@
CODEGENOPT(AssumeSaneOperatorNew , 1, 1) ///< implicit __attribute__((malloc)) operator new
CODEGENOPT(Autolink , 1, 1) ///< -fno-autolink
CODEGENOPT(ObjCAutoRefCountExceptions , 1, 0) ///< Whether ARC should be EH-safe.
+CODEGENOPT(Backchain , 1, 0) ///< -mbackchain
CODEGENOPT(CoverageExtraChecksum, 1, 0) ///< Whether we need a second checksum for functions in GCNO files.
CODEGENOPT(CoverageNoFunctionNamesInData, 1, 0) ///< Do not include function names in GCDA files.
CODEGENOPT(CoverageExitBlockBeforeBody, 1, 0) ///< Whether to emit the exit block before the body blocks in GCNO files.
Index: include/clang/Driver/Options.td
===================================================================
--- include/clang/Driver/Options.td
+++ include/clang/Driver/Options.td
@@ -1519,6 +1519,10 @@
def mzvector : Flag<["-"], "mzvector">, Alias<fzvector>;
def mno_zvector : Flag<["-"], "mno-zvector">, Alias<fno_zvector>;
+def mbackchain : Flag<["-"], "mbackchain">, Group<m_Group>, Flags<[DriverOption,CC1Option]>,
+ HelpText<"Link stack frames through backchain on System Z">;
+def mno_backchain : Flag<["-"], "mno-backchain">, Group<m_Group>, Flags<[DriverOption,CC1Option]>;
+
def mno_warn_nonportable_cfstrings : Flag<["-"], "mno-warn-nonportable-cfstrings">, Group<m_Group>;
def mno_omit_leaf_frame_pointer : Flag<["-"], "mno-omit-leaf-frame-pointer">, Group<m_Group>;
def momit_leaf_frame_pointer : Flag<["-"], "momit-leaf-frame-pointer">, Group<m_Group>,
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