Add an option to disable the LLVM verifier pass (which is still always
disabled in NDEBUG builds).  The option applies only to -cc1 invocations and is:
  -disable_llvm_verifier

llvm-svn: 96046
diff --git a/clang/lib/Frontend/CompilerInvocation.cpp b/clang/lib/Frontend/CompilerInvocation.cpp
index 7287d42..bd45f07 100644
--- a/clang/lib/Frontend/CompilerInvocation.cpp
+++ b/clang/lib/Frontend/CompilerInvocation.cpp
@@ -794,7 +794,7 @@
 #ifdef NDEBUG
   Opts.VerifyModule = 0;
 #else
-  Opts.VerifyModule = 1;
+  Opts.VerifyModule = !Args.hasArg(OPT_disable_llvm_verifier);
 #endif
 }