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Add support for one argument OneArgFP instructions
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@11094 91177308-0d34-0410-b5e6-96231b3b80d8
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@ -383,10 +383,11 @@ void FPS::handleZeroArgFP(MachineBasicBlock::iterator &I) {
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///
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void FPS::handleOneArgFP(MachineBasicBlock::iterator &I) {
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MachineInstr *MI = *I;
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assert(MI->getNumOperands() == 5 && "Can only handle fst* instructions!");
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assert((MI->getNumOperands() == 5 || MI->getNumOperands() == 1) &&
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"Can only handle fst* & ftst instructions!");
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// Is this the last use of the source register?
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unsigned Reg = getFPReg(MI->getOperand(4));
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unsigned Reg = getFPReg(MI->getOperand(MI->getNumOperands()-1));
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bool KillsSrc = false;
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for (LiveVariables::killed_iterator KI = LV->killed_begin(MI),
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E = LV->killed_end(MI); KI != E; ++KI)
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@ -403,7 +404,7 @@ void FPS::handleOneArgFP(MachineBasicBlock::iterator &I) {
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} else {
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moveToTop(Reg, I); // Move to the top of the stack...
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}
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MI->RemoveOperand(4); // Remove explicit ST(0) operand
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MI->RemoveOperand(MI->getNumOperands()-1); // Remove explicit ST(0) operand
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if (MI->getOpcode() == X86::FSTPr80 || MI->getOpcode() == X86::FISTPr64) {
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assert(StackTop > 0 && "Stack empty??");
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@ -383,10 +383,11 @@ void FPS::handleZeroArgFP(MachineBasicBlock::iterator &I) {
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///
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void FPS::handleOneArgFP(MachineBasicBlock::iterator &I) {
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MachineInstr *MI = *I;
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assert(MI->getNumOperands() == 5 && "Can only handle fst* instructions!");
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assert((MI->getNumOperands() == 5 || MI->getNumOperands() == 1) &&
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"Can only handle fst* & ftst instructions!");
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// Is this the last use of the source register?
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unsigned Reg = getFPReg(MI->getOperand(4));
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unsigned Reg = getFPReg(MI->getOperand(MI->getNumOperands()-1));
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bool KillsSrc = false;
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for (LiveVariables::killed_iterator KI = LV->killed_begin(MI),
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E = LV->killed_end(MI); KI != E; ++KI)
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@ -403,7 +404,7 @@ void FPS::handleOneArgFP(MachineBasicBlock::iterator &I) {
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} else {
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moveToTop(Reg, I); // Move to the top of the stack...
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}
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MI->RemoveOperand(4); // Remove explicit ST(0) operand
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MI->RemoveOperand(MI->getNumOperands()-1); // Remove explicit ST(0) operand
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if (MI->getOpcode() == X86::FSTPr80 || MI->getOpcode() == X86::FISTPr64) {
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assert(StackTop > 0 && "Stack empty??");
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