================
@@ -2339,6 +2345,28 @@ RValue CodeGenFunction::EmitBuiltinExpr(const GlobalDecl
GD, unsigned BuiltinID,
// LLVM counterparts if the call is marked 'const' (known to never set
errno).
// In case FP exceptions are enabled, the experimental versions of the
// intrinsics model those.
+ bool ConstAlways =
+ getContext().BuiltinInfo.isConst(BuiltinID);
+
+ // There's a special case with the fma builtins where they are always const
+ // if the target environment is GNU or the target is OS is Windows and we're
+ // targeting the MSVCRT.dll environment.
+ switch (BuiltinID) {
----------------
AaronBallman wrote:
I worry about this list getting out of sync with reality again; it would be
nice if we had some way to get this information out of `BuiltinInfo` instead of
having a separate list here. If that's a difficult change to make, I don't
insist on it happening now, but then we should add a FIXME comment to remember
to come back and clean this up.
https://github.com/llvm/llvm-project/pull/66381
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