[X86] Mark the FUCOMI instructions as requiring CMOV to be enabled. NFCI

These instructions were added on the PentiumPro along with CMOV.

This was already comprehended by the lowering process which should emit an alternate sequence using FCOM and FNSTW. This just makes it an explicit error if that doesn't work for some reason.

llvm-svn: 340844

diff --git a/llvm/lib/Target/X86/X86InstrFPStack.td b/llvm/lib/Target/X86/X86InstrFPStack.td
index cc81a91..5912a31 100644 (file)
--- a/llvm/lib/Target/X86/X86InstrFPStack.td
+++ b/llvm/lib/Target/X86/X86InstrFPStack.td
@@ -592,10 +592,13 @@ def UCOM_Fpr80 : FpI_  <(outs), (ins RFP80:$lhs, RFP80:$rhs), CompareFP,
 let SchedRW = [WriteFCom] in {
 // CC = ST(0) cmp ST(i)
 let Defs = [EFLAGS, FPSW] in {
+let Predicates = [FPStackf32, HasCMov] in
 def UCOM_FpIr32: FpIf32<(outs), (ins RFP32:$lhs, RFP32:$rhs), CompareFP,
                   [(set EFLAGS, (X86cmp RFP32:$lhs, RFP32:$rhs))]>;
+let Predicates = [FPStackf64, HasCMov] in
 def UCOM_FpIr64: FpIf64<(outs), (ins RFP64:$lhs, RFP64:$rhs), CompareFP,
                   [(set EFLAGS, (X86cmp RFP64:$lhs, RFP64:$rhs))]>;
+let Predicates = [HasCMov] in
 def UCOM_FpIr80: FpI_<(outs), (ins RFP80:$lhs, RFP80:$rhs), CompareFP,
                   [(set EFLAGS, (X86cmp RFP80:$lhs, RFP80:$rhs))]>;
 }