Add implicit def of EFLAGS on those instructions that may modify flags.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@41962 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Target/X86/X86InstrFPStack.td b/lib/Target/X86/X86InstrFPStack.td
index d47add6..c4a4e4c 100644
--- a/lib/Target/X86/X86InstrFPStack.td
+++ b/lib/Target/X86/X86InstrFPStack.td
@@ -488,7 +488,7 @@
def UCOM_FpIr80: FpI_<(outs), (ins RFP80:$lhs, RFP80:$rhs), CompareFP,
[(X86cmp RFP80:$lhs, RFP80:$rhs)]>; // CC = ST(0) cmp ST(i)
-let Uses = [ST0] in {
+let Defs = [EFLAGS], Uses = [ST0] in {
def UCOM_Fr : FPI<0xE0, AddRegFrm, // FPSW = cmp ST(0) with ST(i)
(outs), (ins RST:$reg),
"fucom\t$reg">, DD;