FIX PR 4459.
Not sure I understand how the temp register gets used,
but this fixes a bug and introduces no regressions.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@74446 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Target/X86/X86FloatingPoint.cpp b/lib/Target/X86/X86FloatingPoint.cpp
index ed4eb44..abacdb2 100644
--- a/lib/Target/X86/X86FloatingPoint.cpp
+++ b/lib/Target/X86/X86FloatingPoint.cpp
@@ -996,7 +996,7 @@
// it is possible for FP0 to be alive after this instruction.
if (!MI->killsRegister(X86::FP0)) {
// Duplicate ST0
- duplicateToTop(0, 0, I);
+ duplicateToTop(0, 7 /*temp register*/, I);
}
--StackTop; // "Forget" we have something on the top of stack!
break;