Add a new LangOpt NativeHalfType. This option allows for native half/fp16
operations (as opposed to storage only half/fp16).
Also add some semantic checks for OpenCL half types.
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@173254 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/CodeGen/CGExprScalar.cpp b/lib/CodeGen/CGExprScalar.cpp
index ed927e2..7f0eda8 100644
--- a/lib/CodeGen/CGExprScalar.cpp
+++ b/lib/CodeGen/CGExprScalar.cpp
@@ -664,9 +664,8 @@
QualType OrigSrcType = SrcType;
llvm::Type *SrcTy = Src->getType();
- // Floating casts might be a bit special: if we're doing casts to / from half
- // FP, we should go via special intrinsics.
- if (SrcType->isHalfType()) {
+ // If casting to/from storage-only half FP, use special intrinsics.
+ if (SrcType->isHalfType() && !CGF.getContext().getLangOpts().NativeHalfType) {
Src = Builder.CreateCall(CGF.CGM.getIntrinsic(llvm::Intrinsic::convert_from_fp16), Src);
SrcType = CGF.getContext().FloatTy;
SrcTy = CGF.FloatTy;
@@ -735,7 +734,7 @@
DstTy);
// Cast to half via float
- if (DstType->isHalfType())
+ if (DstType->isHalfType() && !CGF.getContext().getLangOpts().NativeHalfType)
DstTy = CGF.FloatTy;
if (isa<llvm::IntegerType>(SrcTy)) {
@@ -1536,7 +1535,7 @@
// Add the inc/dec to the real part.
llvm::Value *amt;
- if (type->isHalfType()) {
+ if (type->isHalfType() && !CGF.getContext().getLangOpts().NativeHalfType) {
// Another special case: half FP increment should be done via float
value =
Builder.CreateCall(CGF.CGM.getIntrinsic(llvm::Intrinsic::convert_from_fp16),
@@ -1558,7 +1557,7 @@
}
value = Builder.CreateFAdd(value, amt, isInc ? "inc" : "dec");
- if (type->isHalfType())
+ if (type->isHalfType() && !CGF.getContext().getLangOpts().NativeHalfType)
value =
Builder.CreateCall(CGF.CGM.getIntrinsic(llvm::Intrinsic::convert_to_fp16),
value);