From: Torok Edwin <edwintorok@gmail.com>
Date: Wed, 17 Jun 2009 18:48:18 +0000 (+0000)
Subject: Add debug message about non-local loads being clobbered.
X-Git-Url: http://demsky.eecs.uci.edu/git/?a=commitdiff_plain;h=4306b1a329cbaf1e866bead2cd6042859a808c8a;p=oota-llvm.git

Add debug message about non-local loads being clobbered.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@73625 91177308-0d34-0410-b5e6-96231b3b80d8
---

diff --git a/lib/Transforms/Scalar/GVN.cpp b/lib/Transforms/Scalar/GVN.cpp
index 95137793f20..1e89ef7b22d 100644
--- a/lib/Transforms/Scalar/GVN.cpp
+++ b/lib/Transforms/Scalar/GVN.cpp
@@ -952,8 +952,14 @@ bool GVN::processNonLocalLoad(LoadInst *LI,
 
   // If we had a phi translation failure, we'll have a single entry which is a
   // clobber in the current block.  Reject this early.
-  if (Deps.size() == 1 && Deps[0].second.isClobber())
+  if (Deps.size() == 1 && Deps[0].second.isClobber()) {
+    DEBUG(
+      DOUT << "GVN: non-local load ";
+      WriteAsOperand(*DOUT.stream(), LI);
+      DOUT << " is clobbered by " << *Deps[0].second.getInst();
+    );
     return false;
+  }
   
   // Filter out useless results (non-locals, etc).  Keep track of the blocks
   // where we have a value available in repl, also keep track of whether we see