Don't try to set an EFLAGS operand to dead if no instruction was created.

This fixes a bug introduced by r61215.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@64316 91177308-0d34-0410-b5e6-96231b3b80d8

1 files changed, 6 insertions, 4 deletions

diff --git a/lib/Target/X86/X86RegisterInfo.cpp b/lib/Target/X86/X86RegisterInfo.cpp
index 89d9f9b939..59e49eaf4f 100644
--- a/lib/Target/X86/X86RegisterInfo.cpp
+++ b/lib/Target/X86/X86RegisterInfo.cpp
@@ -412,11 +412,13 @@ eliminateCallFramePseudoInstr(MachineFunction &MF, MachineBasicBlock &MBB,
         }
       }
 
-      // The EFLAGS implicit def is dead.
-      New->getOperand(3).setIsDead();
+      if (New) {
+        // The EFLAGS implicit def is dead.
+        New->getOperand(3).setIsDead();
 
-      // Replace the pseudo instruction with a new instruction...
-      if (New) MBB.insert(I, New);
+        // Replace the pseudo instruction with a new instruction...
+        MBB.insert(I, New);
+      }
     }
   } else if (I->getOpcode() == getCallFrameDestroyOpcode()) {
     // If we are performing frame pointer elimination and if the callee pops