================
@@ -17724,7 +17078,24 @@ bool IntExprEvaluator::VisitCastExpr(const CastExpr
*E) {
case CK_HLSLAggregateSplatCast:
llvm_unreachable("invalid cast kind for integral value");
- case CK_BitCast:
+ case CK_BitCast:{
+ APValue Sub;
+ if (!Evaluate(Sub, Info, E->getSubExpr()))
+ return false;
+
+ QualType SrcTy = E->getSubExpr()->getType();
+ QualType DstTy = E->getType();
+
+ // Allow reinterpretation if bit widths match
+ if (Info.Ctx.getTypeSize(SrcTy) == Info.Ctx.getTypeSize(DstTy)) {
+ // Use APValue::BitCast if available, else just copy value bits
----------------
tbaederr wrote:
What is `APValue::BitCast`?
https://github.com/llvm/llvm-project/pull/167016
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