remove an extraneous mem2reg pass early in the pipe. Since

this is run after the 'standard function passes', SRoA was
recently run.  This saves a domfrontier construction. Thanks
to Eli for noticing this.

llvm-svn: 82291

llvm/include/llvm/Support/StandardPasses.h

@@ -99,8 +99,6 @@ namespace llvm {
     if (UnitAtATime)
       PM->add(createRaiseAllocationsPass());    // call %malloc -> malloc inst
     PM->add(createCFGSimplificationPass());     // Clean up disgusting code
-    // Kill useless allocas
-    PM->add(createPromoteMemoryToRegisterPass());
     if (UnitAtATime) {
       PM->add(createGlobalOptimizerPass());     // Optimize out global vars
       PM->add(createGlobalDCEPass());           // Remove unused fns and globs