================
@@ -3607,6 +3607,30 @@ bool SemaHLSL::CheckBuiltinFunctionCall(unsigned
BuiltinID, CallExpr *TheCall) {
return true;
break;
}
+ case Builtin::BI__builtin_hlsl_wave_prefix_count_bits: {
+ if (SemaRef.checkArgCount(TheCall, 1))
+ return true;
+
+ // Ensure input expr type is a scalar/vector and then
+ // set the return type to the arg type
----------------
tex3d wrote:
This comment doesn't sound right, nor is it what the code does.
- doesn't accept vector input (WavePrefixCountBits is scalar only in DXC too,
so it's a comment problem)
- Does not set the return type (which is fine if it's already uint in
definition)
- The return type should not be the same as the arg type - should be uint
https://github.com/llvm/llvm-project/pull/178059
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