================
@@ -2616,6 +2617,13 @@ bool Sema::IsFloatingPointPromotion(QualType FromType,
QualType ToType) {
ToBuiltin->getKind() == BuiltinType::Ibm128))
return true;
+ // In HLSL, `half` promotes to `float` or `double`, regardless of whether
+ // or not native half types are enabled.
----------------
llvm-beanz wrote:
There is a difference between the IR and language types. `half` is always
`half` in the language, which is always a different type form `float`. This
behavior is consistent in earlier language modes and with 202x:
https://godbolt.org/z/3bzoocdrG
When you don't pass `-enable-16bit-types`, `half` is 32-bit and conforms to the
IEEE single-precision fp32 representation (see:
https://github.com/llvm/llvm-project/pull/90694).
https://github.com/llvm/llvm-project/pull/90222
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