From b3712f8146ece9a87a771c4d67e897c5833770ef Mon Sep 17 00:00:00 2001
From: Bill Wendling <isanbard@gmail.com>
Date: Thu, 15 Nov 2007 02:06:30 +0000
Subject: [PATCH] Adding debug output during coalescing.

llvm-svn: 44154
---
 llvm/lib/CodeGen/RegAllocLinearScan.cpp | 1 +
 1 file changed, 1 insertion(+)

diff --git a/llvm/lib/CodeGen/RegAllocLinearScan.cpp b/llvm/lib/CodeGen/RegAllocLinearScan.cpp
index 9f08b1db09f7..bc9febff59a9 100644
--- a/llvm/lib/CodeGen/RegAllocLinearScan.cpp
+++ b/llvm/lib/CodeGen/RegAllocLinearScan.cpp
@@ -233,6 +233,7 @@ unsigned RALinScan::attemptTrivialCoalescing(LiveInterval &cur, unsigned Reg) {
 
   // Try to coalesce.
   if (!li_->conflictsWithPhysRegDef(cur, *vrm_, SrcReg)) {
+    DOUT << "Coalescing: " << cur << " -> " << mri_->getName(SrcReg) << '\n';
     vrm_->clearVirt(cur.reg);
     vrm_->assignVirt2Phys(cur.reg, SrcReg);
     ++NumCoalesce;