Added phi elimination code

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@1265 91177308-0d34-0410-b5e6-96231b3b80d8

1 files changed, 40 insertions, 9 deletions

diff --git a/lib/Target/SparcV9/SparcV9RegInfo.cpp b/lib/Target/SparcV9/SparcV9RegInfo.cpp
index cb7009d..4040b02 100644
--- a/lib/Target/SparcV9/SparcV9RegInfo.cpp
+++ b/lib/Target/SparcV9/SparcV9RegInfo.cpp
@@ -893,7 +893,6 @@ void UltraSparcRegInfo::colorRetValue(const  MachineInstr *const RetMI,
 // register number
 //---------------------------------------------------------------------------
 
-
 MachineInstr * UltraSparcRegInfo::cpReg2RegMI(const unsigned SrcReg, 
 					      const unsigned DestReg,
 					      const int RegType) const {
@@ -1040,24 +1039,56 @@ MachineInstr * UltraSparcRegInfo::cpMem2RegMI(const unsigned SrcPtrReg,
 
 
 
-// Following method is Not needed now
 
-MachineInstr* UltraSparcRegInfo::cpValue2Value(Value *Src, Value *Dest) const {
+//---------------------------------------------------------------------------
+// Generate a copy instruction to copy a value to another. Temporarily
+// used by PhiElimination code.
+//---------------------------------------------------------------------------
+
+
+MachineInstr * UltraSparcRegInfo::cpValue2Value(Value *Src, Value *Dest) const{
+
+  int RegType = getRegType( Src );
+
+  assert( (RegType==getRegType(Src))  && "Src & Dest are diff types");
 
   MachineInstr * MI = NULL;
 
-  MI = new MachineInstr(ADD, 3);
-  MI->SetMachineOperand(0, MachineOperand:: MO_VirtualRegister, Src, false);
-  MI->SetMachineOperand(1, SparcIntRegOrder::g0, false);
-  MI->SetMachineOperand(2, MachineOperand:: MO_VirtualRegister, Dest, true);
-  
+  switch( RegType ) {
+    
+  case IntRegType:
 
-  return MI;
+    MI = new MachineInstr(ADD, 3);
+    MI->SetMachineOperand(0, MachineOperand:: MO_VirtualRegister, Src, false);
+    MI->SetMachineOperand(1, SparcIntRegOrder::g0, false);
+    MI->SetMachineOperand(2, MachineOperand:: MO_VirtualRegister, Dest, true);
+    break;
 
+  case FPSingleRegType:
+    MI = new MachineInstr(FMOVS, 2);
+    MI->SetMachineOperand(0, MachineOperand:: MO_VirtualRegister, Src, false);
+    MI->SetMachineOperand(1, MachineOperand:: MO_VirtualRegister, Dest, true);
+    break;
+
+
+  case FPDoubleRegType:
+    MI = new MachineInstr(FMOVD, 2);
+    MI->SetMachineOperand(0, MachineOperand:: MO_VirtualRegister, Src, false);
+    MI->SetMachineOperand(1, MachineOperand:: MO_VirtualRegister, Dest, true);
+    break;
+
+  default:
+    assert(0 && "Unknow RegType in CpValu2Value");
+  }
+
+  return MI;
 }
 
 
 
+
+
+
 //----------------------------------------------------------------------------
 // This method inserts caller saving/restoring instructons before/after
 // a call machine instruction.