[SystemZ] Do not install IfConverter pass at -O0

When not optimizing, do not run the IfConverter pass, this makes
debugging more difficult (and causes a testsuite failure in
DebugInfo/unconditional-branch.ll).

llvm-svn: 210263

1 files changed, 2 insertions, 1 deletions

diff --git a/llvm/lib/Target/SystemZ/SystemZTargetMachine.cpp b/llvm/lib/Target/SystemZ/SystemZTargetMachine.cpp
index 4c9ce29c7e2..1fca067ad2e 100644
--- a/llvm/lib/Target/SystemZ/SystemZTargetMachine.cpp
+++ b/llvm/lib/Target/SystemZ/SystemZTargetMachine.cpp
@@ -65,7 +65,8 @@ bool SystemZPassConfig::addInstSelector() {
 }
 
 bool SystemZPassConfig::addPreSched2() {
-  if (getSystemZTargetMachine().getSubtargetImpl()->hasLoadStoreOnCond())
+  if (getOptLevel() != CodeGenOpt::None &&
+      getSystemZTargetMachine().getSubtargetImpl()->hasLoadStoreOnCond())
     addPass(&IfConverterID);
   return true;
 }