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

When the backend is used from clang, it should produce proper diagnostics
instead of just printing messages to errs(). Other clients may also want to
register their own error handlers with the LLVMContext, and the same handler
should work for warnings in the same way as the existing emitError methods.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@171041 91177308-0d34-0410-b5e6-96231b3b80d8

1 files changed, 2 insertions, 2 deletions

diff --git a/lib/Transforms/Instrumentation/PathProfiling.cpp b/lib/Transforms/Instrumentation/PathProfiling.cpp
index 2a0e89ce6a..2d324b89b1 100644
--- a/lib/Transforms/Instrumentation/PathProfiling.cpp
+++ b/lib/Transforms/Instrumentation/PathProfiling.cpp
@@ -1345,8 +1345,8 @@ bool PathProfiler::runOnModule(Module &M) {
     Main = M.getFunction("MAIN__");
 
   if (!Main) {
-    errs() << "WARNING: cannot insert path profiling into a module"
-           << " with no main function!\n";
+    Context->emitWarning("cannot insert edge profiling into a module"
+                         " with no main function");
     return false;
   }