[ms-inline asm] Add basic codegen support for simple asm stmts. Currently,
only machine specific clobbers are modeled.
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@161524 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/CodeGen/CGStmt.cpp b/lib/CodeGen/CGStmt.cpp
index 33776b6..2e4c557 100644
--- a/lib/CodeGen/CGStmt.cpp
+++ b/lib/CodeGen/CGStmt.cpp
@@ -1686,4 +1686,19 @@
// MS-style inline assembly is not fully supported, so sema emits a warning.
if (!CGM.getCodeGenOpts().EmitMicrosoftInlineAsm)
return;
+
+ assert (S.isSimple() && "CodeGen can only handle simple MSAsmStmts.");
+
+ std::vector<llvm::Value*> Args;
+ std::vector<llvm::Type *> ArgTypes;
+
+ std::string MachineClobbers = Target.getClobbers();
+
+ llvm::FunctionType *FTy =
+ llvm::FunctionType::get(VoidTy, ArgTypes, false);
+
+ llvm::InlineAsm *IA =
+ llvm::InlineAsm::get(FTy, *S.getAsmString(), MachineClobbers, true);
+ llvm::CallInst *Result = Builder.CreateCall(IA, Args);
+ Result->addAttribute(~0, llvm::Attribute::NoUnwind);
}
diff --git a/test/CodeGen/ms-inline-asm.c b/test/CodeGen/ms-inline-asm.c
index 2d36bbc..3234b98 100644
--- a/test/CodeGen/ms-inline-asm.c
+++ b/test/CodeGen/ms-inline-asm.c
@@ -1,7 +1,8 @@
-// RUN: %clang_cc1 %s -triple x86_64-apple-darwin10 -O0 -fms-extensions -w -emit-llvm -o - | FileCheck %s
+// RUN: %clang_cc1 %s -triple x86_64-apple-darwin10 -O0 -fms-extensions -fenable-experimental-ms-inline-asm -w -emit-llvm -o - | FileCheck %s
void t1() {
// CHECK: @t1
+// CHECK: call void asm sideeffect "", "~{dirflag},~{fpsr},~{flags}"() nounwind
// CHECK: ret void
__asm {}
}