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

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for register allocation.

llvm-svn: 1270
This commit is contained in:
Vikram S. Adve 2001-11-12 18:54:11 +00:00
parent 624846d3fd
commit a3f0115c71
1 changed files with 5 additions and 0 deletions
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5
lib/Target/Sparc/SparcInstrSelection.cpp
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@ -2017,6 +2017,10 @@ GetInstructionsByRule(InstructionNode* subtreeRoot,
} }
case 64: // reg: Phi(reg,reg) 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. { // This instruction has variable #operands, so resultPos is 0.
Instruction* phi = subtreeRoot->getInstruction(); Instruction* phi = subtreeRoot->getInstruction();
mvec[0] = new MachineInstr(PHI, 1 + phi->getNumOperands()); mvec[0] = new MachineInstr(PHI, 1 + phi->getNumOperands());
@ -2027,6 +2031,7 @@ GetInstructionsByRule(InstructionNode* subtreeRoot,
phi->getOperand(i)); phi->getOperand(i));
break; break;
} }
#endif NEED_PHI_MACHINE_INSTRS
case 71: // reg: VReg case 71: // reg: VReg
case 72: // reg: Constant case 72: // reg: Constant