[llvm-commits] [llvm] r161285 - /llvm/trunk/lib/CodeGen/TwoAddressInstructionPass.cpp

[Jakob Stoklund Olesen]

Author: stoklund
Date: Fri Aug  3 19:04:03 2012
New Revision: 161285

URL: http://llvm.org/viewvc/llvm-project?rev=161285&view=rev
Log:
Delete a dead variable.

TwoAddressInstructionPass doesn't remat any more.

Modified:
    llvm/trunk/lib/CodeGen/TwoAddressInstructionPass.cpp

Modified: llvm/trunk/lib/CodeGen/TwoAddressInstructionPass.cpp
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/lib/CodeGen/TwoAddressInstructionPass.cpp?rev=161285&r1=161284&r2=161285&view=diff
==============================================================================
--- llvm/trunk/lib/CodeGen/TwoAddressInstructionPass.cpp (original)
+++ llvm/trunk/lib/CodeGen/TwoAddressInstructionPass.cpp Fri Aug  3 19:04:03 2012
@@ -1387,9 +1387,6 @@
   // This pass takes the function out of SSA form.
   MRI->leaveSSA();
 
-  // ReMatRegs - Keep track of the registers whose def's are remat'ed.
-  BitVector ReMatRegs(MRI->getNumVirtRegs());
-
   TiedOperandMap TiedOperands;
 
   SmallPtrSet<MachineInstr*, 8> Processed;
@@ -1478,15 +1475,6 @@
     }
   }
 
-  // Some remat'ed instructions are dead.
-  for (int i = ReMatRegs.find_first(); i != -1; i = ReMatRegs.find_next(i)) {
-    unsigned VReg = TargetRegisterInfo::index2VirtReg(i);
-    if (MRI->use_nodbg_empty(VReg)) {
-      MachineInstr *DefMI = MRI->getVRegDef(VReg);
-      DefMI->eraseFromParent();
-    }
-  }
-
   // Eliminate REG_SEQUENCE instructions. Their whole purpose was to preseve
   // SSA form. It's now safe to de-SSA.
   MadeChange |= EliminateRegSequences();