Run an instcombine pass after inlining but before scalarrepl. This allows

instcombine to clean up the code, which makes more code suitable for SRoA.
This helps C++ code in particular, e.g. speeding up tramp3d by 31%.

llvm-svn: 33235

llvm/tools/gccas/gccas.cpp

@@ -102,6 +102,7 @@ void AddConfiguredTransformationPasses(PassManager &PM) {
 
   addPass(PM, createRaisePointerReferencesPass());// Recover type information
   addPass(PM, createTailDuplicationPass());      // Simplify cfg by copying code
+  addPass(PM, createInstructionCombiningPass()); // Cleanup for scalarrepl.
   addPass(PM, createCFGSimplificationPass());    // Merge & remove BBs
   addPass(PM, createScalarReplAggregatesPass()); // Break up aggregate allocas
   addPass(PM, createInstructionCombiningPass()); // Combine silly seq's