Disable use of the Phi machine instruction which is no longer needed

for register allocation.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@1270 91177308-0d34-0410-b5e6-96231b3b80d8

diff --git a/lib/Target/SparcV9/SparcV9InstrSelection.cpp b/lib/Target/SparcV9/SparcV9InstrSelection.cpp
index 533d74c15f91bf3c31f2d003ebf8d8052ee26080..4feecbb1bd1ed0328f3a4df0c41272e627b9db35 100644 (file)
--- a/lib/Target/SparcV9/SparcV9InstrSelection.cpp
+++ b/lib/Target/SparcV9/SparcV9InstrSelection.cpp
@@ -2017,6 +2017,10 @@ GetInstructionsByRule(InstructionNode* subtreeRoot,
       }
       
       case 64: // reg:   Phi(reg,reg)
+        numInstr = 0;                  // don't forward the value
+        break;
+#undef NEED_PHI_MACHINE_INSTRS
+#ifdef NEED_PHI_MACHINE_INSTRS
       {                // This instruction has variable #operands, so resultPos is 0.
         Instruction* phi = subtreeRoot->getInstruction();
         mvec[0] = new MachineInstr(PHI, 1 + phi->getNumOperands());
@@ -2027,6 +2031,7 @@ GetInstructionsByRule(InstructionNode* subtreeRoot,
                                           phi->getOperand(i));
         break;
       }  
+#endif NEED_PHI_MACHINE_INSTRS
       
       case 71: // reg:     VReg
       case 72: // reg:     Constant