Revert r361811: 'Re-commit r357452 (take 2): "SimplifyCFG SinkCommonCodeFromPredecessors ...'

We have observed some failures with internal builds with this revision.

- Performance regressions:
  - llvm's SingleSource/Misc evalloop shows performance regressions (although these may be red herrings).
  - Benchmarks for Abseil's SwissTable.
- Correctness:
  - Failures for particular libicu tests when building the Google AppEngine SDK (for PHP).

hwennborg has already been notified, and is aware of reproducer failures.

llvm-svn: 363220
diff --git a/clang/test/CodeGenCXX/stack-reuse-exceptions.cpp b/clang/test/CodeGenCXX/stack-reuse-exceptions.cpp
index 2d968db..de870c5 100644
--- a/clang/test/CodeGenCXX/stack-reuse-exceptions.cpp
+++ b/clang/test/CodeGenCXX/stack-reuse-exceptions.cpp
@@ -1,5 +1,5 @@
 // RUN: %clang_cc1 -triple x86_64-unknown-linux-gnu %s -o - -emit-llvm -O1 \
-// RUN:     -fexceptions -fcxx-exceptions -mllvm -simplifycfg-sink-common=false | FileCheck %s
+// RUN:     -fexceptions -fcxx-exceptions | FileCheck %s
 //
 // We should emit lifetime.ends for these temporaries in both the 'exception'
 // and 'normal' paths in functions.