Revert "Add LLVMContext::emitWarning methods and use them. <rdar://problem/12867368>"

This reverts r171041. This was a nice idea that didn't work out well.
Clang warnings need to be associated with warning groups so that they can
be selectively disabled, promoted to errors, etc. This simplistic patch didn't
allow for that. Enhancing it to provide some way for the backend to specify
a front-end warning type seems like overkill for the few uses of this, at
least for now.

llvm-svn: 174748

1 files changed, 2 insertions, 2 deletions

diff --git a/llvm/lib/Transforms/Instrumentation/PathProfiling.cpp b/llvm/lib/Transforms/Instrumentation/PathProfiling.cpp
index 358bbeb3c87..7de73269cf2 100644
--- a/llvm/lib/Transforms/Instrumentation/PathProfiling.cpp
+++ b/llvm/lib/Transforms/Instrumentation/PathProfiling.cpp
@@ -1345,8 +1345,8 @@ bool PathProfiler::runOnModule(Module &M) {
     Main = M.getFunction("MAIN__");
 
   if (!Main) {
-    Context->emitWarning("cannot insert edge profiling into a module"
-                         " with no main function");
+    errs() << "WARNING: cannot insert path profiling into a module"
+           << " with no main function!\n";
     return false;
   }