[ms-inline asm] Add support for clobbers in CodeGen.
This is a reapplication of r161914 now that the scoping issue has been resolved
in r161966.
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@161967 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/CodeGen/CGStmt.cpp b/lib/CodeGen/CGStmt.cpp
index 467c779..d78908d 100644
--- a/lib/CodeGen/CGStmt.cpp
+++ b/lib/CodeGen/CGStmt.cpp
@@ -1691,14 +1691,36 @@
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);