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CodeGen: Use MachineInstr& in StackSlotColoring, NFC

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Avoid implicit iterator to pointer conversions.

llvm-svn: 274892
This commit is contained in:
Duncan P. N. Exon Smith 2016-07-08 17:28:40 +00:00
parent 1660b62035
commit 654bb6a756
1 changed files with 11 additions and 14 deletions
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25
lib/CodeGen/StackSlotColoring.cpp
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@ -107,7 +107,7 @@ namespace {
bool OverlapWithAssignments(LiveInterval *li, int Color) const;
int ColorSlot(LiveInterval *li);
bool ColorSlots(MachineFunction &MF);
void RewriteInstruction(MachineInstr *MI, SmallVectorImpl<int> &SlotMapping,
void RewriteInstruction(MachineInstr &MI, SmallVectorImpl<int> &SlotMapping,
MachineFunction &MF);
bool RemoveDeadStores(MachineBasicBlock* MBB);
};
@ -326,13 +326,10 @@ bool StackSlotColoring::ColorSlots(MachineFunction &MF) {
}
// Rewrite all MO_FrameIndex operands. Look for dead stores.
for (MachineFunction::iterator MBBI = MF.begin(), E = MF.end();
MBBI != E; ++MBBI) {
MachineBasicBlock *MBB = &*MBBI;
for (MachineBasicBlock::iterator MII = MBB->begin(), EE = MBB->end();
MII != EE; ++MII)
RewriteInstruction(MII, SlotMapping, MF);
RemoveDeadStores(MBB);
for (MachineBasicBlock &MBB : MF) {
for (MachineInstr &MI : MBB)
RewriteInstruction(MI, SlotMapping, MF);
RemoveDeadStores(&MBB);
}
// Delete unused stack slots.
@ -347,12 +344,12 @@ bool StackSlotColoring::ColorSlots(MachineFunction &MF) {
/// RewriteInstruction - Rewrite specified instruction by replacing references
/// to old frame index with new one.
void StackSlotColoring::RewriteInstruction(MachineInstr *MI,
void StackSlotColoring::RewriteInstruction(MachineInstr &MI,
SmallVectorImpl<int> &SlotMapping,
MachineFunction &MF) {
// Update the operands.
for (unsigned i = 0, ee = MI->getNumOperands(); i != ee; ++i) {
MachineOperand &MO = MI->getOperand(i);
for (unsigned i = 0, ee = MI.getNumOperands(); i != ee; ++i) {
MachineOperand &MO = MI.getOperand(i);
if (!MO.isFI())
continue;
int OldFI = MO.getIndex();
@ -390,7 +387,7 @@ bool StackSlotColoring::RemoveDeadStores(MachineBasicBlock* MBB) {
FirstSS != -1) {
++NumDead;
changed = true;
toErase.push_back(I);
toErase.push_back(&*I);
continue;
}
@ -410,10 +407,10 @@ bool StackSlotColoring::RemoveDeadStores(MachineBasicBlock* MBB) {
if (NextMI->findRegisterUseOperandIdx(LoadReg, true, nullptr) != -1) {
++NumDead;
toErase.push_back(I);
toErase.push_back(&*I);
}
toErase.push_back(NextMI);
toErase.push_back(&*NextMI);
++I;
}