Add SRoA pass to gccas


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@6442 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/tools/gccas/gccas.cpp b/tools/gccas/gccas.cpp
index 9d9ab6a..ae42b71 100644
--- a/tools/gccas/gccas.cpp
+++ b/tools/gccas/gccas.cpp
@@ -73,6 +73,7 @@
   addPass(PM, createInstructionCombiningPass()); // Cleanup code for raise
   addPass(PM, createRaisePointerReferencesPass());// Recover type information
   addPass(PM, createInstructionCombiningPass()); // Combine silly seq's
+  addPass(PM, createScalarReplAggregatesPass()); // Break up aggregate allocas
   addPass(PM, createPromoteMemoryToRegister());  // Promote alloca's to regs
   addPass(PM, createIndVarSimplifyPass());       // Simplify indvars
   addPass(PM, createReassociatePass());          // Reassociate expressions