Don't emit two comparisons when comparing a FP value against zero!

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@20651 91177308-0d34-0410-b5e6-96231b3b80d8

diff --git a/lib/Target/X86/X86ISelPattern.cpp b/lib/Target/X86/X86ISelPattern.cpp
index 9b68ad8b02d15c5e79a84d2a6204bec8ea0fa529..4ae21305b7b02a5bab76a2e4522fb9990aecdc44 100644 (file)
--- a/lib/Target/X86/X86ISelPattern.cpp
+++ b/lib/Target/X86/X86ISelPattern.cpp
@@ -1078,6 +1078,7 @@ void ISel::EmitCMP(SDOperand LHS, SDOperand RHS, bool HasOneUse) {
       BuildMI(BB, X86::FTST, 1).addReg(Reg);
       BuildMI(BB, X86::FNSTSW8r, 0);
       BuildMI(BB, X86::SAHF, 1);
+      return;
     }
   }