/// want.
MachineModuleInfoImpl *ObjFileMMI;
- // LabelIDList - One entry per assigned label. Normally the entry is equal to
- // the list index(+1). If the entry is zero then the label has been deleted.
- // Any other value indicates the label has been deleted by is mapped to
- // another label.
- std::vector<unsigned> LabelIDList;
+ /// NextLabelIDToReturn - Unique ID counter for labels.
+ unsigned NextLabelIDToReturn;
// FrameMoves - List of moves done by a function's prolog. Used to construct
// frame maps by debug and exception handling consumers.
/// NextLabelID - Return the next unique label id.
///
unsigned NextLabelID() {
- unsigned ID = (unsigned)LabelIDList.size() + 1;
- LabelIDList.push_back(ID);
- return ID;
+ return NextLabelIDToReturn++;
}
/// getLabelSym - Turn a label ID into a symbol.
MCSymbol *getLabelSym(unsigned ID);
- /// InvalidateLabel - Inhibit use of the specified label # from
- /// MachineModuleInfo, for example because the code was deleted.
- void InvalidateLabel(unsigned LabelID) {
- // Remap to zero to indicate deletion.
- assert(0 < LabelID && LabelID <= LabelIDList.size() &&
- "Old label ID out of range.");
- LabelIDList[LabelID - 1] = 0;
- }
-
/// getFrameMoves - Returns a reference to a list of moves done in the current
/// function's prologue. Used to construct frame maps for debug and exception
/// handling comsumers.
while (!MBB->succ_empty())
MBB->removeSuccessor(MBB->succ_end()-1);
- // If there are any labels in the basic block, unregister them from
- // MachineModuleInfo.
- if (MMI && !MBB->empty()) {
- for (MachineBasicBlock::iterator I = MBB->begin(), E = MBB->end();
- I != E; ++I) {
- if (I->isLabel())
- // The label ID # is always operand #0, an immediate.
- MMI->InvalidateLabel(I->getOperand(0).getImm());
- }
- }
-
// Remove the block.
MF->erase(MBB);
}
MachineModuleInfo::MachineModuleInfo(const MCAsmInfo &MAI)
: ImmutablePass(&ID), Context(MAI),
- ObjFileMMI(0), CurCallSite(0), CallsEHReturn(0), CallsUnwindInit(0),
- DbgInfoAvailable(false) {
+ ObjFileMMI(0), NextLabelIDToReturn(1),
+ CurCallSite(0), CallsEHReturn(0), CallsUnwindInit(0), DbgInfoAvailable(false){
// Always emit some info, by default "no personality" info.
Personalities.push_back(NULL);
}
while (!MBB->succ_empty())
MBB->removeSuccessor(MBB->succ_end()-1);
- // If there are any labels in the basic block, unregister them from
- // MachineModuleInfo.
- if (MMI && !MBB->empty()) {
- for (MachineBasicBlock::iterator I = MBB->begin(), E = MBB->end();
- I != E; ++I) {
- if (I->isLabel())
- // The label ID # is always operand #0, an immediate.
- MMI->InvalidateLabel(I->getOperand(0).getImm());
- }
- }
-
// Remove the block.
MBB->eraseFromParent();
}
}
// Actually remove the blocks now.
- for (unsigned i = 0, e = DeadBlocks.size(); i != e; ++i) {
- MachineBasicBlock *MBB = DeadBlocks[i];
- // If there are any labels in the basic block, unregister them from
- // MachineModuleInfo.
- if (MMI && !MBB->empty()) {
- for (MachineBasicBlock::iterator I = MBB->begin(),
- E = MBB->end(); I != E; ++I) {
- if (I->isLabel())
- // The label ID # is always operand #0, an immediate.
- MMI->InvalidateLabel(I->getOperand(0).getImm());
- }
- }
- MBB->eraseFromParent();
- }
+ for (unsigned i = 0, e = DeadBlocks.size(); i != e; ++i)
+ DeadBlocks[i]->eraseFromParent();
// Cleanup PHI nodes.
for (MachineFunction::iterator I = F.begin(), E = F.end(); I != E; ++I) {