================
@@ -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: {
----------------
zahiraam wrote:
I see. I was referring to
https://github.com/llvm/llvm-project/blob/main/clang/lib/CodeGen/CGBuiltin.cpp#L3543.
@AaronBallman I am not sure how to get to the runtime value. `godbolt` doesn't
seem to offer output for powerpc clang?
With this change (special casing frexpl for AIX) the IR produced is:
`call { double, i32 } @llvm.frexp.f64.i32(double 1.234500e+02)`
without this change the IR is:
`store double 0.000000e+00, ptr %returnValue, align 8`
This doesn't seem correct to me.
Making the change in the test as @hubert-reinterpretcast is suggesting would
give this IR (which also seems correct to me:
`@input = global double 0.000000e+00, align 8`
`load double, ptr @input, align 8
`%0 = load double, ptr @input, align 8`
`call { double, i32 } @llvm.frexp.f64.i32(double %0)`
https://github.com/llvm/llvm-project/pull/88978
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