Add support for optimization reports.

Summary:
This patch adds backend support for -Rpass=, which indicates the name
of the optimization pass that should emit remarks stating when it
made a transformation to the code.

Pass names are taken from their DEBUG_NAME definitions.

When emitting an optimization report diagnostic, the lack of debug
information causes the diagnostic to use "<unknown>:0:0" as the
location string.

This is the back end counterpart for

http://llvm-reviews.chandlerc.com/D3226

Reviewers: qcolombet

CC: llvm-commits

Differential Revision: http://llvm-reviews.chandlerc.com/D3227

llvm-svn: 205774

1 files changed, 8 insertions, 0 deletions

diff --git a/llvm/lib/IR/LLVMContext.cpp b/llvm/lib/IR/LLVMContext.cpp
index 1bfc515..3f05561 100644
--- a/llvm/lib/IR/LLVMContext.cpp
+++ b/llvm/lib/IR/LLVMContext.cpp
@@ -15,6 +15,7 @@
 #include "llvm/IR/LLVMContext.h"
 #include "LLVMContextImpl.h"
 #include "llvm/IR/Constants.h"
+#include "llvm/IR/DebugLoc.h"
 #include "llvm/IR/DiagnosticInfo.h"
 #include "llvm/IR/DiagnosticPrinter.h"
 #include "llvm/IR/Instruction.h"
@@ -155,6 +156,13 @@ void LLVMContext::emitError(unsigned LocCookie, const Twine &ErrorStr) {
   diagnose(DiagnosticInfoInlineAsm(LocCookie, ErrorStr));
 }
 
+void LLVMContext::emitOptimizationRemark(const char *PassName,
+                                         const Function &Fn,
+                                         const DebugLoc &DLoc,
+                                         const Twine &Msg) {
+  diagnose(DiagnosticInfoOptimizationRemark(PassName, Fn, DLoc, Msg));
+}
+
 //===----------------------------------------------------------------------===//
 // Metadata Kind Uniquing
 //===----------------------------------------------------------------------===//