[ms] Implement the __annotation intrinsic
llvm-svn: 312572
diff --git a/clang/lib/CodeGen/CGBuiltin.cpp b/clang/lib/CodeGen/CGBuiltin.cpp
index 1923c58..7170514 100644
--- a/clang/lib/CodeGen/CGBuiltin.cpp
+++ b/clang/lib/CodeGen/CGBuiltin.cpp
@@ -30,6 +30,7 @@
#include "llvm/IR/InlineAsm.h"
#include "llvm/IR/Intrinsics.h"
#include "llvm/IR/MDBuilder.h"
+#include "llvm/Support/ConvertUTF.h"
#include <sstream>
using namespace clang;
@@ -1953,6 +1954,28 @@
Builder.CreateZExt(EmitSignBit(*this, EmitScalarExpr(E->getArg(0))),
ConvertType(E->getType())));
}
+ case Builtin::BI__annotation: {
+ // Re-encode each wide string to UTF8 and make an MDString.
+ SmallVector<Metadata *, 1> Strings;
+ for (const Expr *Arg : E->arguments()) {
+ const auto *Str = cast<StringLiteral>(Arg->IgnoreParenCasts());
+ assert(Str->getCharByteWidth() == 2);
+ StringRef WideBytes = Str->getBytes();
+ std::string StrUtf8;
+ if (!convertUTF16ToUTF8String(
+ makeArrayRef(WideBytes.data(), WideBytes.size()), StrUtf8)) {
+ CGM.ErrorUnsupported(E, "non-UTF16 __annotation argument");
+ continue;
+ }
+ Strings.push_back(llvm::MDString::get(getLLVMContext(), StrUtf8));
+ }
+
+ // Build and MDTuple of MDStrings and emit the intrinsic call.
+ llvm::Value *F = CGM.getIntrinsic(llvm::Intrinsic::label_annotation, {});
+ MDTuple *StrTuple = MDTuple::get(getLLVMContext(), Strings);
+ Builder.CreateCall(F, MetadataAsValue::get(getLLVMContext(), StrTuple));
+ return RValue::getIgnored();
+ }
case Builtin::BI__builtin_annotation: {
llvm::Value *AnnVal = EmitScalarExpr(E->getArg(0));
llvm::Value *F = CGM.getIntrinsic(llvm::Intrinsic::annotation,