Do not run frame verification if target does not use frame instructions

llvm-svn: 300807
diff --git a/llvm/lib/CodeGen/MachineVerifier.cpp b/llvm/lib/CodeGen/MachineVerifier.cpp
index d392c04..84bd670 100644
--- a/llvm/lib/CodeGen/MachineVerifier.cpp
+++ b/llvm/lib/CodeGen/MachineVerifier.cpp
@@ -2030,6 +2030,8 @@
 void MachineVerifier::verifyStackFrame() {
   unsigned FrameSetupOpcode   = TII->getCallFrameSetupOpcode();
   unsigned FrameDestroyOpcode = TII->getCallFrameDestroyOpcode();
+  if (FrameSetupOpcode == ~0u && FrameDestroyOpcode == ~0u)
+    return;
 
   SmallVector<StackStateOfBB, 8> SPState;
   SPState.resize(MF->getNumBlockIDs());