From cf1823dc25b9687af9277b824eb7cac3931bdb5e Mon Sep 17 00:00:00 2001 From: Jakob Stoklund Olesen Date: Sat, 4 Aug 2012 00:04:03 +0000 Subject: [PATCH] Delete a dead variable. TwoAddressInstructionPass doesn't remat any more. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@161285 91177308-0d34-0410-b5e6-96231b3b80d8 --- lib/CodeGen/TwoAddressInstructionPass.cpp | 12 ------------ 1 file changed, 12 deletions(-) diff --git a/lib/CodeGen/TwoAddressInstructionPass.cpp b/lib/CodeGen/TwoAddressInstructionPass.cpp index d2f9a1b30db..62d54208c6d 100644 --- a/lib/CodeGen/TwoAddressInstructionPass.cpp +++ b/lib/CodeGen/TwoAddressInstructionPass.cpp @@ -1387,9 +1387,6 @@ bool TwoAddressInstructionPass::runOnMachineFunction(MachineFunction &Func) { // 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 Processed; @@ -1478,15 +1475,6 @@ bool TwoAddressInstructionPass::runOnMachineFunction(MachineFunction &Func) { } } - // 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();