commit 2a7b41ba4d3eb3c6003f6768dc20b28d83eac265
author Jim Grosbach <grosbach@apple.com> Thu Jun 30 23:38:17 2011 +0000
committer Jim Grosbach <grosbach@apple.com> Thu Jun 30 23:38:17 2011 +0000
tree 74d0d6ab330b8b4317e30390e0145a8b6bfe934e
parent 73744df0c467895bac9e25d5c62f34a0a8fcc4f9

Refact ARM Thumb1 tMOVr instruction family.

Merge the tMOVr, tMOVgpr2tgpr, tMOVtgpr2gpr, and tMOVgpr2gpr instructions
into tMOVr. There's no need to keep them separate. Giving the tMOVr
instruction the proper GPR register class for its operands is sufficient
to give the register allocator enough information to do the right thing
directly.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@134204 91177308-0d34-0410-b5e6-96231b3b80d8

lib/Target/ARM/Thumb2InstrInfo.cpp

diff --git a/lib/Target/ARM/Thumb2InstrInfo.cpp b/lib/Target/ARM/Thumb2InstrInfo.cpp
index d958693..51b56aa 100644
--- a/lib/Target/ARM/Thumb2InstrInfo.cpp
+++ b/lib/Target/ARM/Thumb2InstrInfo.cpp
@@ -112,17 +112,7 @@
   if (!ARM::GPRRegClass.contains(DestReg, SrcReg))
     return ARMBaseInstrInfo::copyPhysReg(MBB, I, DL, DestReg, SrcReg, KillSrc);
 
-  bool tDest = ARM::tGPRRegClass.contains(DestReg);
-  bool tSrc  = ARM::tGPRRegClass.contains(SrcReg);
-  unsigned Opc = ARM::tMOVgpr2gpr;
-  if (tDest && tSrc)
-    Opc = ARM::tMOVr;
-  else if (tSrc)
-    Opc = ARM::tMOVtgpr2gpr;
-  else if (tDest)
-    Opc = ARM::tMOVgpr2tgpr;
-
-  AddDefaultPred(BuildMI(MBB, I, DL, get(Opc), DestReg)
+  AddDefaultPred(BuildMI(MBB, I, DL, get(ARM::tMOVr), DestReg)
     .addReg(SrcReg, getKillRegState(KillSrc)));
 }
 
@@ -231,7 +221,7 @@
     unsigned Opc = 0;
     if (DestReg == ARM::SP && BaseReg != ARM::SP) {
       // mov sp, rn. Note t2MOVr cannot be used.
-      AddDefaultPred(BuildMI(MBB, MBBI, dl, TII.get(ARM::tMOVgpr2gpr),DestReg)
+      AddDefaultPred(BuildMI(MBB, MBBI, dl, TII.get(ARM::tMOVr),DestReg)
         .addReg(BaseReg).setMIFlags(MIFlags));
       BaseReg = ARM::SP;
       continue;
@@ -409,7 +399,7 @@
     unsigned PredReg;
     if (Offset == 0 && getInstrPredicate(&MI, PredReg) == ARMCC::AL) {
       // Turn it into a move.
-      MI.setDesc(TII.get(ARM::tMOVgpr2gpr));
+      MI.setDesc(TII.get(ARM::tMOVr));
       MI.getOperand(FrameRegIdx).ChangeToRegister(FrameReg, false);
       // Remove offset and remaining explicit predicate operands.
       do MI.RemoveOperand(FrameRegIdx+1);
@@ -575,8 +565,7 @@
 Thumb2InstrInfo::scheduleTwoAddrSource(MachineInstr *SrcMI,
                                        MachineInstr *UseMI,
                                        const TargetRegisterInfo &TRI) const {
-  if (SrcMI->getOpcode() != ARM::tMOVgpr2gpr ||
-      SrcMI->getOperand(1).isKill())
+  if (SrcMI->getOpcode() != ARM::tMOVr || SrcMI->getOperand(1).isKill())
     return;
 
   unsigned PredReg = 0;