From c42c5243a1b83f40f50e72d2eec747f995889fba Mon Sep 17 00:00:00 2001
From: Dan Gohman <gohman@apple.com>
Date: Wed, 10 Feb 2010 20:42:37 +0000
Subject: [PATCH] Use an AssemblyAnnotatorWriter to clean up IVUsers' debug
 output. The "uses=" comments are just clutter in this context.

llvm-svn: 95799
---
 llvm/lib/Analysis/IVUsers.cpp | 11 ++++++++++-
 1 file changed, 10 insertions(+), 1 deletion(-)

diff --git a/llvm/lib/Analysis/IVUsers.cpp b/llvm/lib/Analysis/IVUsers.cpp
index 9c472ae73bc1..d3dcab0052b6 100644
--- a/llvm/lib/Analysis/IVUsers.cpp
+++ b/llvm/lib/Analysis/IVUsers.cpp
@@ -21,6 +21,7 @@
 #include "llvm/Analysis/Dominators.h"
 #include "llvm/Analysis/LoopPass.h"
 #include "llvm/Analysis/ScalarEvolutionExpressions.h"
+#include "llvm/Assembly/AsmAnnotationWriter.h"
 #include "llvm/ADT/STLExtras.h"
 #include "llvm/Support/Debug.h"
 #include "llvm/Support/raw_ostream.h"
@@ -340,6 +341,13 @@ const SCEV *IVUsers::getCanonicalExpr(const IVStrideUse &U) const {
   return RetVal;
 }
 
+namespace {
+
+// Suppress extraneous comments.
+class IVUsersAsmAnnotator : public AssemblyAnnotationWriter {};
+
+}
+
 void IVUsers::print(raw_ostream &OS, const Module *M) const {
   OS << "IV Users for loop ";
   WriteAsOperand(OS, L->getHeader(), false);
@@ -349,6 +357,7 @@ void IVUsers::print(raw_ostream &OS, const Module *M) const {
   }
   OS << ":\n";
 
+  IVUsersAsmAnnotator Annotator;
   for (unsigned Stride = 0, e = StrideOrder.size(); Stride != e; ++Stride) {
     std::map<const SCEV *, IVUsersOfOneStride*>::const_iterator SI =
       IVUsesByStride.find(StrideOrder[Stride]);
@@ -364,7 +373,7 @@ void IVUsers::print(raw_ostream &OS, const Module *M) const {
       if (UI->isUseOfPostIncrementedValue())
         OS << " (post-inc)";
       OS << " in ";
-      UI->getUser()->print(OS);
+      UI->getUser()->print(OS, &Annotator);
       OS << '\n';
     }
   }