[AMDGPU] Do not run scalar optimization passes at "-O0"

Differential Revision: https://reviews.llvm.org/D25055

llvm-svn: 282873

llvm/lib/Target/AMDGPU/AMDGPUTargetMachine.cpp

@@ -395,9 +395,9 @@ void AMDGPUPassConfig::addIRPasses() {
 
     if (EnableSROA)
       addPass(createSROAPass());
-  }
 
     addStraightLineScalarOptimizationPasses();
+  }
 
   TargetPassConfig::addIRPasses();