From: Chris Lattner <sabre@nondot.org>
Date: Sun, 3 Sep 2006 00:06:08 +0000 (+0000)
Subject: When deleting a machine instruction, make sure to remove it from the
X-Git-Url: http://demsky.eecs.uci.edu/git/?a=commitdiff_plain;h=2ac0d43fa2cbf2dd1b024a40685eb1b758ddac56;p=oota-llvm.git

When deleting a machine instruction, make sure to remove it from the
livevariables information.  This fixes several regalloc=local failures on x86


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@30062 91177308-0d34-0410-b5e6-96231b3b80d8
---

diff --git a/lib/CodeGen/RegAllocLocal.cpp b/lib/CodeGen/RegAllocLocal.cpp
index dd8a8815604..c435c34f49e 100644
--- a/lib/CodeGen/RegAllocLocal.cpp
+++ b/lib/CodeGen/RegAllocLocal.cpp
@@ -659,8 +659,11 @@ void RA::AllocateBasicBlock(MachineBasicBlock &MBB) {
     
     // Finally, if this is a noop copy instruction, zap it.
     unsigned SrcReg, DstReg;
-    if (TII.isMoveInstr(*MI, SrcReg, DstReg) && SrcReg == DstReg)
+    if (TII.isMoveInstr(*MI, SrcReg, DstReg) && SrcReg == DstReg) {
+      LV->removeVirtualRegistersKilled(MI);
+      LV->removeVirtualRegistersDead(MI);
       MBB.erase(MI);
+    }
   }
 
   MachineBasicBlock::iterator MI = MBB.getFirstTerminator();