Make load->store deletion a bit smarter. This allows us to compile this:

[oota-llvm.git] / lib / CodeGen / LowerSubregs.cpp

diff --git a/lib/CodeGen/LowerSubregs.cpp b/lib/CodeGen/LowerSubregs.cpp
index 668a9e5540b7ff6ad75933e6ff56d1d02c87d6d6..4172b12857b7c985a8cf5e173c2db26b29fb1160 100644 (file)
--- a/lib/CodeGen/LowerSubregs.cpp
+++ b/lib/CodeGen/LowerSubregs.cpp
@@ -63,6 +63,7 @@ bool LowerSubregsInstructionPass::LowerExtract(MachineInstr *MI) {
    MachineBasicBlock *MBB = MI->getParent();
    MachineFunction &MF = *MBB->getParent();
    const MRegisterInfo &MRI = *MF.getTarget().getRegisterInfo();
+   const TargetInstrInfo &TII = *MF.getTarget().getInstrInfo();
    
    assert(MI->getOperand(0).isRegister() && MI->getOperand(0).isDef() &&
           MI->getOperand(1).isRegister() && MI->getOperand(1).isUse() &&
@@ -88,7 +89,7 @@ bool LowerSubregsInstructionPass::LowerExtract(MachineInstr *MI) {
      assert(TRC == getPhysicalRegisterRegClass(MRI, SrcReg) &&
              "Extract subreg and Dst must be of same register class");
 
-     MRI.copyRegToReg(*MBB, MI, DstReg, SrcReg, TRC, TRC);
+     TII.copyRegToReg(*MBB, MI, DstReg, SrcReg, TRC, TRC);
      MachineBasicBlock::iterator dMI = MI;
      DOUT << "subreg: " << *(--dMI);
    }
@@ -103,6 +104,7 @@ bool LowerSubregsInstructionPass::LowerInsert(MachineInstr *MI) {
   MachineBasicBlock *MBB = MI->getParent();
   MachineFunction &MF = *MBB->getParent();
   const MRegisterInfo &MRI = *MF.getTarget().getRegisterInfo(); 
+  const TargetInstrInfo &TII = *MF.getTarget().getInstrInfo();
   unsigned DstReg = 0;
   unsigned SrcReg = 0;
   unsigned InsReg = 0;
@@ -157,7 +159,7 @@ bool LowerSubregsInstructionPass::LowerInsert(MachineInstr *MI) {
       } else {
         TRC1 = MF.getRegInfo().getRegClass(InsReg);
       }
-      MRI.copyRegToReg(*MBB, MI, DstSubReg, InsReg, TRC1, TRC1);
+      TII.copyRegToReg(*MBB, MI, DstSubReg, InsReg, TRC1, TRC1);
 
 #ifndef NDEBUG
       MachineBasicBlock::iterator dMI = MI;
@@ -184,7 +186,7 @@ bool LowerSubregsInstructionPass::LowerInsert(MachineInstr *MI) {
     assert(TRC0 == getPhysicalRegisterRegClass(MRI, SrcReg) &&
             "Insert superreg and Dst must be of same register class");
 
-    MRI.copyRegToReg(*MBB, MI, DstReg, SrcReg, TRC0, TRC0);
+    TII.copyRegToReg(*MBB, MI, DstReg, SrcReg, TRC0, TRC0);
 
 #ifndef NDEBUG
     MachineBasicBlock::iterator dMI = MI;
@@ -206,7 +208,7 @@ bool LowerSubregsInstructionPass::LowerInsert(MachineInstr *MI) {
     } else {
       TRC1 = MF.getRegInfo().getRegClass(InsReg);
     }
-    MRI.copyRegToReg(*MBB, MI, DstSubReg, InsReg, TRC1, TRC1);
+    TII.copyRegToReg(*MBB, MI, DstSubReg, InsReg, TRC1, TRC1);
 
 #ifndef NDEBUG
     MachineBasicBlock::iterator dMI = MI;