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[ms-inline asm] Add support for clobbers in CodeGen. 

llvm-svn: 161914
This commit is contained in:
Chad Rosier 2012-08-15 00:43:09 +00:00
parent 222ed4b53a
commit 2d5d1327c4
2 changed files with 28 additions and 6 deletions
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24
clang/lib/CodeGen/CGStmt.cpp
View File

@ -1691,14 +1691,36 @@ void CodeGenFunction::EmitMSAsmStmt(const MSAsmStmt &S) {
std::vector<llvm::Value*> Args;
std::vector<llvm::Type *> ArgTypes;
std::string Constraints;
// Clobbers
for (unsigned i = 0, e = S.getNumClobbers(); i != e; ++i) {
StringRef Clobber = S.getClobber(i);
if (Clobber != "memory" && Clobber != "cc")
Clobber = Target.getNormalizedGCCRegisterName(Clobber);
if (i != 0)
Constraints += ',';
Constraints += "~{";
Constraints += Clobber;
Constraints += '}';
}
// Add machine specific clobbers
std::string MachineClobbers = Target.getClobbers();
if (!MachineClobbers.empty()) {
if (!Constraints.empty())
Constraints += ',';
Constraints += MachineClobbers;
}
llvm::FunctionType *FTy =
llvm::FunctionType::get(VoidTy, ArgTypes, false);
llvm::InlineAsm *IA =
llvm::InlineAsm::get(FTy, *S.getAsmString(), MachineClobbers, true);
llvm::InlineAsm::get(FTy, *S.getAsmString(), Constraints, true);
llvm::CallInst *Result = Builder.CreateCall(IA, Args);
Result->addAttribute(~0, llvm::Attribute::NoUnwind);
Result->addAttribute(~0, llvm::Attribute::IANSDialect);

10
clang/test/CodeGen/ms-inline-asm.c
View File

@ -29,8 +29,8 @@ void t3() {
void t4(void) {
// CHECK: @t4
// CHECK: call void asm sideeffect "mov ebx, eax", "~{dirflag},~{fpsr},~{flags}"() nounwind ia_nsdialect
// CHECK: call void asm sideeffect "mov ecx, ebx", "~{dirflag},~{fpsr},~{flags}"() nounwind ia_nsdialect
// CHECK: call void asm sideeffect "mov ebx, eax", "~{ebx},~{dirflag},~{fpsr},~{flags}"() nounwind ia_nsdialect
// CHECK: call void asm sideeffect "mov ecx, ebx", "~{ecx},~{dirflag},~{fpsr},~{flags}"() nounwind ia_nsdialect
// CHECK: ret void
__asm mov ebx, eax
__asm mov ecx, ebx
@ -38,8 +38,8 @@ void t4(void) {
void t5(void) {
// CHECK: @t5
// CHECK: call void asm sideeffect "mov ebx, eax", "~{dirflag},~{fpsr},~{flags}"() nounwind ia_nsdialect
// CHECK: call void asm sideeffect "mov ecx, ebx", "~{dirflag},~{fpsr},~{flags}"() nounwind ia_nsdialect
// CHECK: call void asm sideeffect "mov ebx, eax", "~{ebx},~{dirflag},~{fpsr},~{flags}"() nounwind ia_nsdialect
// CHECK: call void asm sideeffect "mov ecx, ebx", "~{ecx},~{dirflag},~{fpsr},~{flags}"() nounwind ia_nsdialect
// CHECK: ret void
__asm mov ebx, eax __asm mov ecx, ebx
}
@ -83,5 +83,5 @@ void t10() {
pop ebx
}
// CHECK: t10
// CHECK: call void asm sideeffect "push ebx\0Amov ebx, 0x07\0Apop ebx", "~{dirflag},~{fpsr},~{flags}"() nounwind ia_nsdialect
// CHECK: call void asm sideeffect "push ebx\0Amov ebx, 0x07\0Apop ebx", "~{ebx},~{ebx},~{dirflag},~{fpsr},~{flags}"() nounwind ia_nsdialect
}