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Revert. This wasn't meant to be checked in.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@31737 91177308-0d34-0410-b5e6-96231b3b80d8
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@ -40,7 +40,6 @@
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#include "llvm/Support/Debug.h"
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#include "llvm/Support/Compiler.h"
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#include "llvm/ADT/DepthFirstIterator.h"
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#include "llvm/ADT/SmallVector.h"
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#include "llvm/ADT/Statistic.h"
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#include "llvm/ADT/STLExtras.h"
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#include <algorithm>
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@ -214,12 +213,20 @@ bool FPS::processBasicBlock(MachineFunction &MF, MachineBasicBlock &BB) {
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// Get dead variables list now because the MI pointer may be deleted as part
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// of processing!
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SmallVector<unsigned, 8> DeadRegs;
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for (unsigned i = 0, e = MI->getNumOperands(); i != e; ++i) {
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const MachineOperand &MO = MI->getOperand(i);
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if (MO.isReg() && MO.isDead())
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DeadRegs.push_back(MO.getReg());
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}
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LiveVariables::killed_iterator IB, IE;
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tie(IB, IE) = LV->dead_range(MI);
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DEBUG(
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const MRegisterInfo *MRI = MF.getTarget().getRegisterInfo();
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LiveVariables::killed_iterator I = LV->killed_begin(MI);
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LiveVariables::killed_iterator E = LV->killed_end(MI);
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if (I != E) {
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std::cerr << "Killed Operands:";
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for (; I != E; ++I)
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std::cerr << " %" << MRI->getName(*I);
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std::cerr << "\n";
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}
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);
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switch (Flags & X86II::FPTypeMask) {
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case X86II::ZeroArgFP: handleZeroArgFP(I); break;
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@ -234,8 +241,8 @@ bool FPS::processBasicBlock(MachineFunction &MF, MachineBasicBlock &BB) {
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// Check to see if any of the values defined by this instruction are dead
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// after definition. If so, pop them.
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for (unsigned i = 0, e = DeadRegs.size(); i != e; ++i) {
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unsigned Reg = DeadRegs[i];
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for (; IB != IE; ++IB) {
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unsigned Reg = *IB;
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if (Reg >= X86::FP0 && Reg <= X86::FP6) {
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DEBUG(std::cerr << "Register FP#" << Reg-X86::FP0 << " is dead!\n");
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freeStackSlotAfter(I, Reg-X86::FP0);
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@ -755,7 +762,6 @@ void FPS::handleCondMovFP(MachineBasicBlock::iterator &I) {
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unsigned Op0 = getFPReg(MI->getOperand(0));
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unsigned Op1 = getFPReg(MI->getOperand(2));
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bool KillsOp1 = LV->KillsRegister(MI, X86::FP0+Op1);
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// The first operand *must* be on the top of the stack.
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moveToTop(Op0, I);
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@ -767,8 +773,9 @@ void FPS::handleCondMovFP(MachineBasicBlock::iterator &I) {
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MI->getOperand(0).setReg(getSTReg(Op1));
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MI->setOpcode(getConcreteOpcode(MI->getOpcode()));
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// If we kill the second operand, make sure to pop it from the stack.
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if (Op0 != Op1 && KillsOp1) {
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if (Op0 != Op1 && LV->KillsRegister(MI, X86::FP0+Op1)) {
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// Get this value off of the register stack.
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freeStackSlotAfter(I, Op1);
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}
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