From 01daa32a92bfc6b0b04a6e3a40e1f310ec6501a6 Mon Sep 17 00:00:00 2001
From: "Vikram S. Adve" <vadve@cs.uiuc.edu>
Date: Mon, 12 Nov 2001 18:54:11 +0000
Subject: [PATCH] Disable use of the Phi machine instruction which is no longer
 needed for register allocation.

llvm-svn: 1270
---
 llvm/lib/Target/Sparc/SparcInstrSelection.cpp | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/llvm/lib/Target/Sparc/SparcInstrSelection.cpp b/llvm/lib/Target/Sparc/SparcInstrSelection.cpp
index 533d74c15f91..4feecbb1bd1e 100644
--- a/llvm/lib/Target/Sparc/SparcInstrSelection.cpp
+++ b/llvm/lib/Target/Sparc/SparcInstrSelection.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