================
@@ -2658,6 +2658,8 @@ Value *ScalarExprEmitter::VisitCastExpr(CastExpr *CE) {
Address Addr =
SourceLVal.getAddress().withElementType(CGF.ConvertTypeForMem(DestTy));
LValue DestLV = CGF.MakeAddrLValue(Addr, DestTy);
+ if (SourceLVal.isVolatileQualified())
+ DestLV.getQuals().addVolatile();
----------------
hubert-reinterpretcast wrote:
> The standard specification for std::bit_cast doesn't actually say what
> happens if the operand is volatile.
That seems to be a real problem because there really isn't supposed to be an
lvalue-to-rvalue conversion of the bound input glvalue, but trying to apply
`volatile` semantics on the object representation would result in multiple
volatile accesses. I'll report the issue tomorrow or later this week.
https://github.com/llvm/llvm-project/pull/231830
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