Disable new sroa now that all buildbots have tested it.

What we have so far:
- Some clang test failures (these were known already)

- Perf results are mixed, some big regressions
  http://llvm.org/perf/db_default/v4/nts/3844
  http://llvm.org/perf/db_default/v4/nts/3845

  bullet suffers a lot. matmul is interesting: slower scalar code, faster with -vectorize.

- Some dragonegg selfhost bots crash in SROA during selfhost now
  http://lab.llvm.org:8011/builders/dragonegg-x86_64-linux-gcc-4.6-self-host-checks/builds/1632
  http://lab.llvm.org:8011/builders/dragonegg-x86_64-linux-gcc-4.5-self-host/builds/1891

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@163968 91177308-0d34-0410-b5e6-96231b3b80d8

lib/Transforms/IPO/PassManagerBuilder.cpp

@@ -41,7 +41,7 @@ UseGVNAfterVectorization("use-gvn-after-vectorization",
   cl::desc("Run GVN instead of Early CSE after vectorization passes"));
 
 static cl::opt<bool> UseNewSROA("use-new-sroa",
-  cl::init(true), cl::Hidden,
+  cl::init(false), cl::Hidden,
   cl::desc("Enable the new, experimental SROA pass"));
 
 PassManagerBuilder::PassManagerBuilder() {