Add a LiveRangeEdit delegate callback before shrinking a live range.

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

diff --git a/lib/CodeGen/LowerSubregs.cpp b/lib/CodeGen/LowerSubregs.cpp
index a1f1a078d613a6428878492b3a97d57c01172905..7871ba9c17e493d3db4dae0ebd35633408cfb1fc 100644 (file)
--- a/lib/CodeGen/LowerSubregs.cpp
+++ b/lib/CodeGen/LowerSubregs.cpp
@@ -37,7 +37,7 @@ namespace {
   public:
     static char ID; // Pass identification, replacement for typeid
     LowerSubregsInstructionPass() : MachineFunctionPass(ID) {}
-    
+
     const char *getPassName() const {
       return "Subregister lowering instruction pass";
     }
@@ -58,17 +58,14 @@ namespace {
 
     void TransferDeadFlag(MachineInstr *MI, unsigned DstReg,
                           const TargetRegisterInfo *TRI);
-    void TransferKillFlag(MachineInstr *MI, unsigned SrcReg,
-                          const TargetRegisterInfo *TRI,
-                          bool AddIfNotFound = false);
     void TransferImplicitDefs(MachineInstr *MI);
   };
 
   char LowerSubregsInstructionPass::ID = 0;
 }
 
-FunctionPass *llvm::createLowerSubregsPass() { 
-  return new LowerSubregsInstructionPass(); 
+FunctionPass *llvm::createLowerSubregsPass() {
+  return new LowerSubregsInstructionPass();
 }
 
 /// TransferDeadFlag - MI is a pseudo-instruction with DstReg dead,
@@ -87,23 +84,6 @@ LowerSubregsInstructionPass::TransferDeadFlag(MachineInstr *MI,
   }
 }
 
-/// TransferKillFlag - MI is a pseudo-instruction with SrcReg killed,
-/// and the lowered replacement instructions immediately precede it.
-/// Mark the replacement instructions with the kill flag.
-void
-LowerSubregsInstructionPass::TransferKillFlag(MachineInstr *MI,
-                                              unsigned SrcReg,
-                                              const TargetRegisterInfo *TRI,
-                                              bool AddIfNotFound) {
-  for (MachineBasicBlock::iterator MII =
-        prior(MachineBasicBlock::iterator(MI)); ; --MII) {
-    if (MII->addRegisterKilled(SrcReg, TRI, AddIfNotFound))
-      break;
-    assert(MII != MI->getParent()->begin() &&
-           "copyPhysReg output doesn't reference source register!");
-  }
-}
-
 /// TransferImplicitDefs - MI is a pseudo-instruction, and the lowered
 /// replacement instructions immediately precede it.  Copy any implicit-def
 /// operands from MI to the replacement instruction.
@@ -212,9 +192,9 @@ bool LowerSubregsInstructionPass::LowerCopy(MachineInstr *MI) {
 /// copies.
 ///
 bool LowerSubregsInstructionPass::runOnMachineFunction(MachineFunction &MF) {
-  DEBUG(dbgs() << "Machine Function\n"  
+  DEBUG(dbgs() << "Machine Function\n"
                << "********** LOWERING SUBREG INSTRS **********\n"
-               << "********** Function: " 
+               << "********** Function: "
                << MF.getFunction()->getName() << '\n');
   TRI = MF.getTarget().getRegisterInfo();
   TII = MF.getTarget().getInstrInfo();