From 2a282f2f8657183c83375371a3850b182f93ba0b Mon Sep 17 00:00:00 2001 From: Jim Grosbach Date: Wed, 16 Dec 2009 19:43:02 +0000 Subject: Add @earlyclobber TableGen constraint llvm-svn: 91554 --- llvm/lib/CodeGen/MachineInstr.cpp | 24 +++++++++++++++++++++--- 1 file changed, 21 insertions(+), 3 deletions(-) (limited to 'llvm/lib/CodeGen/MachineInstr.cpp') diff --git a/llvm/lib/CodeGen/MachineInstr.cpp b/llvm/lib/CodeGen/MachineInstr.cpp index 12b974d30be..e3b870927a8 100644 --- a/llvm/lib/CodeGen/MachineInstr.cpp +++ b/llvm/lib/CodeGen/MachineInstr.cpp @@ -555,8 +555,13 @@ void MachineInstr::addOperand(const MachineOperand &Op) { Operands.back().ParentMI = this; // If the operand is a register, update the operand's use list. - if (Op.isReg()) + if (Op.isReg()) { Operands.back().AddRegOperandToRegInfo(RegInfo); + // If the register operand is flagged as early, mark the operand as such + unsigned OpNo = Operands.size() - 1; + if (TID->getOperandConstraint(OpNo, TOI::EARLY_CLOBBER) != -1) + Operands[OpNo].setIsEarlyClobber(true); + } return; } } @@ -573,8 +578,12 @@ void MachineInstr::addOperand(const MachineOperand &Op) { // Do explicitly set the reginfo for this operand though, to ensure the // next/prev fields are properly nulled out. - if (Operands[OpNo].isReg()) + if (Operands[OpNo].isReg()) { Operands[OpNo].AddRegOperandToRegInfo(0); + // If the register operand is flagged as early, mark the operand as such + if (TID->getOperandConstraint(OpNo, TOI::EARLY_CLOBBER) != -1) + Operands[OpNo].setIsEarlyClobber(true); + } } else if (Operands.size()+1 <= Operands.capacity()) { // Otherwise, we have to remove register operands from their register use @@ -594,8 +603,12 @@ void MachineInstr::addOperand(const MachineOperand &Op) { Operands.insert(Operands.begin()+OpNo, Op); Operands[OpNo].ParentMI = this; - if (Operands[OpNo].isReg()) + if (Operands[OpNo].isReg()) { Operands[OpNo].AddRegOperandToRegInfo(RegInfo); + // If the register operand is flagged as early, mark the operand as such + if (TID->getOperandConstraint(OpNo, TOI::EARLY_CLOBBER) != -1) + Operands[OpNo].setIsEarlyClobber(true); + } // Re-add all the implicit ops. for (unsigned i = OpNo+1, e = Operands.size(); i != e; ++i) { @@ -613,6 +626,11 @@ void MachineInstr::addOperand(const MachineOperand &Op) { // Re-add all the operands. AddRegOperandsToUseLists(*RegInfo); + + // If the register operand is flagged as early, mark the operand as such + if (Operands[OpNo].isReg() + && TID->getOperandConstraint(OpNo, TOI::EARLY_CLOBBER) != -1) + Operands[OpNo].setIsEarlyClobber(true); } } -- cgit v1.2.3