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Attach attribute "disable-tail-calls" to the functions in the IR. 

This commit adds back the code that seems to have been dropped unintentionally
in r176985.

rdar://problem/13752163

Differential Revision: http://reviews.llvm.org/D10100

llvm-svn: 239426
This commit is contained in:
Akira Hatanaka 2015-06-09 19:04:36 +00:00
parent 7fef2f5206
commit 262a4c4ec0
6 changed files with 22 additions and 11 deletions
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2
clang/lib/CodeGen/BackendUtil.cpp
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@ -283,7 +283,6 @@ void EmitAssemblyHelper::CreatePasses() {
PMBuilder.SLPVectorize = CodeGenOpts.VectorizeSLP;
PMBuilder.LoopVectorize = CodeGenOpts.VectorizeLoop;
PMBuilder.DisableTailCalls = CodeGenOpts.DisableTailCalls;
PMBuilder.DisableUnitAtATime = !CodeGenOpts.UnitAtATime;
PMBuilder.DisableUnrollLoops = !CodeGenOpts.UnrollLoops;
PMBuilder.MergeFunctions = CodeGenOpts.MergeFunctions;
@ -521,7 +520,6 @@ TargetMachine *EmitAssemblyHelper::CreateTargetMachine(bool MustCreateTM) {
Options.NoZerosInBSS = CodeGenOpts.NoZeroInitializedInBSS;
Options.UnsafeFPMath = CodeGenOpts.UnsafeFPMath;
Options.StackAlignmentOverride = CodeGenOpts.StackAlignment;
Options.DisableTailCalls = CodeGenOpts.DisableTailCalls;
Options.TrapFuncName = CodeGenOpts.TrapFuncName;
Options.PositionIndependentExecutable = LangOpts.PIELevel != 0;
Options.FunctionSections = CodeGenOpts.FunctionSections;

2
clang/lib/CodeGen/CGCall.cpp
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@ -1465,6 +1465,8 @@ void CodeGenModule::ConstructAttributeList(const CGFunctionInfo &FI,
FuncAttrs.addAttribute("no-frame-pointer-elim-non-leaf");
}
FuncAttrs.addAttribute("disable-tail-calls",
llvm::toStringRef(CodeGenOpts.DisableTailCalls));
FuncAttrs.addAttribute("less-precise-fpmad",
llvm::toStringRef(CodeGenOpts.LessPreciseFPMAD));
FuncAttrs.addAttribute("no-infs-fp-math",

2
clang/test/CodeGen/2004-06-17-UnorderedCompares.c
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@ -1,6 +1,6 @@
// RUN: %clang_cc1 -std=c99 %s -emit-llvm -o - | FileCheck %s
// CHECK: @Test
// CHECK-NOT: call
// CHECK-NOT: call{{ }}
_Bool A, B, C, D, E, F;
void TestF(float X, float Y) {

14
clang/test/CodeGen/arm-interrupt-attr.c
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@ -28,11 +28,11 @@ __attribute__((interrupt("UNDEF"))) void test_undef_interrupt() {
// CHECK: define arm_aapcscc void @test_undef_interrupt() [[UNDEF_ATTR:#[0-9]+]]
}
// CHECK: attributes [[GENERIC_ATTR]] = { nounwind alignstack=8 {{"interrupt"[^=]}}
// CHECK: attributes [[IRQ_ATTR]] = { nounwind alignstack=8 "interrupt"="IRQ"
// CHECK: attributes [[FIQ_ATTR]] = { nounwind alignstack=8 "interrupt"="FIQ"
// CHECK: attributes [[SWI_ATTR]] = { nounwind alignstack=8 "interrupt"="SWI"
// CHECK: attributes [[ABORT_ATTR]] = { nounwind alignstack=8 "interrupt"="ABORT"
// CHECK: attributes [[UNDEF_ATTR]] = { nounwind alignstack=8 "interrupt"="UNDEF"
// CHECK: attributes [[GENERIC_ATTR]] = { {{.*}} {{"interrupt"[^=]}}
// CHECK: attributes [[IRQ_ATTR]] = { {{.*}} "interrupt"="IRQ"
// CHECK: attributes [[FIQ_ATTR]] = { {{.*}} "interrupt"="FIQ"
// CHECK: attributes [[SWI_ATTR]] = { {{.*}} "interrupt"="SWI"
// CHECK: attributes [[ABORT_ATTR]] = { {{.*}} "interrupt"="ABORT"
// CHECK: attributes [[UNDEF_ATTR]] = { {{.*}} "interrupt"="UNDEF"
// CHECK-APCS: attributes [[GENERIC_ATTR]] = { nounwind "interrupt"
// CHECK-APCS: attributes [[GENERIC_ATTR]] = { {{.*}} "interrupt"

11
clang/test/CodeGen/attr-disable-tail-calls.c Normal file
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@ -0,0 +1,11 @@
// RUN: %clang_cc1 -triple x86_64-apple-macosx10.7.0 %s -emit-llvm -mdisable-tail-calls -o - | FileCheck %s -check-prefix=CHECK -check-prefix=DISABLE
// RUN: %clang_cc1 -triple x86_64-apple-macosx10.7.0 %s -emit-llvm -o - | FileCheck %s -check-prefix=CHECK -check-prefix=ENABLE
// CHECK: define i32 @f1() [[ATTR:#[0-9]+]] {
int f1() {
return 0;
}
// DISABLE: attributes [[ATTR]] = { {{.*}} "disable-tail-calls"="true" {{.*}} }
// ENABLE: attributes [[ATTR]] = { {{.*}} "disable-tail-calls"="false" {{.*}} }

2
clang/test/CodeGenCXX/ctor-globalopt.cpp
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@ -13,7 +13,7 @@
// CHECK-LABEL: define internal void @_GLOBAL__sub_I_ctor_globalopt.cpp()
// CHECK: call void @
// CHECK-NOT: call
// CHECK-NOT: call{{ }}
// O1: @llvm.global_ctors = appending global [0 x { i32, void ()*, i8* }] zeroinitializer