commit a532bcec2f8b766ec2b623c715fab662e2d2e31d
author Jakob Stoklund Olesen <stoklund@2pi.dk> Tue Jul 17 17:57:23 2012 +0000
committer Jakob Stoklund Olesen <stoklund@2pi.dk> Tue Jul 17 17:57:23 2012 +0000
tree 424b4c31cf26d86e71f673b8d983bc472fe51cda
parent de39671ebb1151b15bb7f3703fdc78061c68763e

Add some trace output to TwoAddressInstructionPass.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@160380 91177308-0d34-0410-b5e6-96231b3b80d8

lib/CodeGen/TwoAddressInstructionPass.cpp

diff --git a/lib/CodeGen/TwoAddressInstructionPass.cpp b/lib/CodeGen/TwoAddressInstructionPass.cpp
index 36503b1..196e06e 100644
--- a/lib/CodeGen/TwoAddressInstructionPass.cpp
+++ b/lib/CodeGen/TwoAddressInstructionPass.cpp
@@ -1001,6 +1001,7 @@
   LV->removeVirtualRegisterKilled(Reg, KillMI);
   LV->addVirtualRegisterKilled(Reg, MI);
 
+  DEBUG(dbgs() << "\trescheduled below kill: " << *KillMI);
   return true;
 }
 
@@ -1154,6 +1155,7 @@
   LV->removeVirtualRegisterKilled(Reg, KillMI);
   LV->addVirtualRegisterKilled(Reg, MI);
 
+  DEBUG(dbgs() << "\trescheduled kill: " << *KillMI);
   return true;
 }
 
@@ -1185,7 +1187,8 @@
   if (!regBKilled && MI.getOperand(DstIdx).isDead() &&
       DeleteUnusedInstr(mi, nmi, mbbi, Dist)) {
     ++NumDeletes;
-    return true; // Done with this instruction.
+    DEBUG(dbgs() << "\tdeleted unused instruction.\n");
+    return true; // Done with this instruction."
   }
 
   if (TargetRegisterInfo::isVirtualRegister(regA))