From: Frits van Bommel <fvbommel@gmail.com>
Date: Sun, 27 Mar 2011 23:32:31 +0000 (+0000)
Subject: Add some debug output when -instcombine uses RAUW. This can make debug output for... 
X-Git-Url: http://demsky.eecs.uci.edu/git/?a=commitdiff_plain;h=f56762a96dbd602f1205ff9e6d1b700d5b4a6c8a;p=oota-llvm.git

Add some debug output when -instcombine uses RAUW. This can make debug output for those cases much clearer since without this it only showed that the original instruction was removed, not what it was replaced with.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@128399 91177308-0d34-0410-b5e6-96231b3b80d8
---

diff --git a/lib/Transforms/InstCombine/InstCombine.h b/lib/Transforms/InstCombine/InstCombine.h
index 0da962a5f40..d5de53aa926 100644
--- a/lib/Transforms/InstCombine/InstCombine.h
+++ b/lib/Transforms/InstCombine/InstCombine.h
@@ -246,7 +246,10 @@ public:
     // segment of unreachable code, so just clobber the instruction.
     if (&I == V) 
       V = UndefValue::get(I.getType());
-      
+
+    DEBUG(errs() << "IC: Replacing " << I << "\n"
+                    "    with " << *V << '\n');
+
     I.replaceAllUsesWith(V);
     return &I;
   }