================
@@ -14574,9 +14574,17 @@ bool FloatExprEvaluator::VisitCallExpr(const CallExpr
*E) {
default:
return false;
+ case Builtin::BI__builtin_frexpl:
+ // AIX library function `frexpl` has 'long double' type and not
+ // PPCDoubleDouble type. To make sure we generate the right value, don't
+ // constant evaluate it and instead defer to a libcall.
+ if (Info.Ctx.getTargetInfo().getTriple().isPPC() &&
+ (&Info.Ctx.getTargetInfo().getLongDoubleFormat() !=
+ &llvm::APFloat::PPCDoubleDouble()))
+ return false;
+ LLVM_FALLTHROUGH;
case Builtin::BI__builtin_frexp:
- case Builtin::BI__builtin_frexpf:
- case Builtin::BI__builtin_frexpl: {
+ case Builtin::BI__builtin_frexpf: {
----------------
hubert-reinterpretcast wrote:
> Does the evaluation produce the same results as would happen at runtime
> despite the different format?
There is no different format. The default format for the `long double` type on
AIX (and the only one supported by Clang for AIX) is IEEE double.
The IR generated for basic `long double` operations might clarify:
https://godbolt.org/z/W4jqr6Kva
https://github.com/llvm/llvm-project/pull/88978
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