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[X86] FUCOMI/FCOMI instructions should Def FPSW not FPCW.

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These instructions can set the exception in FPSW. But I
don't think they can change FPCW. So this looks like a typo.

Differential Revision: https://reviews.llvm.org/D73864
This commit is contained in:
Craig Topper 2020-02-03 07:13:57 -08:00
parent cb8bd29a62
commit cf7fa877a2
1 changed files with 1 additions and 1 deletions
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lib/Target/X86/X86InstrFPStack.td
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@ -645,7 +645,7 @@ def COM_Fpr80 : FpI_ <(outs), (ins RFP80:$lhs, RFP80:$rhs), CompareFP,
let SchedRW = [WriteFCom], mayRaiseFPException = 1 in {
// CC = ST(0) cmp ST(i)
let Defs = [EFLAGS, FPCW], Uses = [FPCW] in {
let Defs = [EFLAGS, FPSW], Uses = [FPCW] in {
def UCOM_FpIr32: FpI_<(outs), (ins RFP32:$lhs, RFP32:$rhs), CompareFP,
[(set EFLAGS, (X86any_fcmp RFP32:$lhs, RFP32:$rhs))]>,
Requires<[FPStackf32, HasCMov]>;