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Revert. This wasn't meant to be checked in.

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@31737 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Evan Cheng 2006-11-14 19:20:33 +00:00
parent 26e552b04c
commit 3cdd9f65ed
1 changed files with 18 additions and 11 deletions
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29
lib/Target/X86/X86FloatingPoint.cpp
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@ -40,7 +40,6 @@
#include "llvm/Support/Debug.h"
#include "llvm/Support/Compiler.h"
#include "llvm/ADT/DepthFirstIterator.h"
#include "llvm/ADT/SmallVector.h"
#include "llvm/ADT/Statistic.h"
#include "llvm/ADT/STLExtras.h"
#include <algorithm>
@ -214,12 +213,20 @@ bool FPS::processBasicBlock(MachineFunction &MF, MachineBasicBlock &BB) {
// Get dead variables list now because the MI pointer may be deleted as part
// of processing!
SmallVector<unsigned, 8> DeadRegs;
for (unsigned i = 0, e = MI->getNumOperands(); i != e; ++i) {
const MachineOperand &MO = MI->getOperand(i);
if (MO.isReg() && MO.isDead())
DeadRegs.push_back(MO.getReg());
}
LiveVariables::killed_iterator IB, IE;
tie(IB, IE) = LV->dead_range(MI);
DEBUG(
const MRegisterInfo *MRI = MF.getTarget().getRegisterInfo();
LiveVariables::killed_iterator I = LV->killed_begin(MI);
LiveVariables::killed_iterator E = LV->killed_end(MI);
if (I != E) {
std::cerr << "Killed Operands:";
for (; I != E; ++I)
std::cerr << " %" << MRI->getName(*I);
std::cerr << "\n";
}
);
switch (Flags & X86II::FPTypeMask) {
case X86II::ZeroArgFP: handleZeroArgFP(I); break;
@ -234,8 +241,8 @@ bool FPS::processBasicBlock(MachineFunction &MF, MachineBasicBlock &BB) {
// Check to see if any of the values defined by this instruction are dead
// after definition. If so, pop them.
for (unsigned i = 0, e = DeadRegs.size(); i != e; ++i) {
unsigned Reg = DeadRegs[i];
for (; IB != IE; ++IB) {
unsigned Reg = *IB;
if (Reg >= X86::FP0 && Reg <= X86::FP6) {
DEBUG(std::cerr << "Register FP#" << Reg-X86::FP0 << " is dead!\n");
freeStackSlotAfter(I, Reg-X86::FP0);
@ -755,7 +762,6 @@ void FPS::handleCondMovFP(MachineBasicBlock::iterator &I) {
unsigned Op0 = getFPReg(MI->getOperand(0));
unsigned Op1 = getFPReg(MI->getOperand(2));
bool KillsOp1 = LV->KillsRegister(MI, X86::FP0+Op1);
// The first operand *must* be on the top of the stack.
moveToTop(Op0, I);
@ -767,8 +773,9 @@ void FPS::handleCondMovFP(MachineBasicBlock::iterator &I) {
MI->getOperand(0).setReg(getSTReg(Op1));
MI->setOpcode(getConcreteOpcode(MI->getOpcode()));
// If we kill the second operand, make sure to pop it from the stack.
if (Op0 != Op1 && KillsOp1) {
if (Op0 != Op1 && LV->KillsRegister(MI, X86::FP0+Op1)) {
// Get this value off of the register stack.
freeStackSlotAfter(I, Op1);
}