MachineBasicBlock::MachineBasicBlock(MachineFunction &mf, const BasicBlock *bb)
: BB(bb), Number(-1), xParent(&mf), Alignment(0), IsLandingPad(false),
- AddressTaken(false) {
+ AddressTaken(false), CachedMCSymbol(NULL) {
Insts.Parent = this;
}
/// getSymbol - Return the MCSymbol for this basic block.
///
MCSymbol *MachineBasicBlock::getSymbol() const {
- const MachineFunction *MF = getParent();
- MCContext &Ctx = MF->getContext();
- const char *Prefix = Ctx.getAsmInfo().getPrivateGlobalPrefix();
- return Ctx.GetOrCreateSymbol(Twine(Prefix) + "BB" +
- Twine(MF->getFunctionNumber()) + "_" +
- Twine(getNumber()));
+ if (!CachedMCSymbol) {
+ const MachineFunction *MF = getParent();
+ MCContext &Ctx = MF->getContext();
+ const char *Prefix = Ctx.getAsmInfo().getPrivateGlobalPrefix();
+ CachedMCSymbol = Ctx.GetOrCreateSymbol(Twine(Prefix) + "BB" +
+ Twine(MF->getFunctionNumber()) +
+ "_" + Twine(getNumber()));
+ }
+
+ return CachedMCSymbol;
}
}
}
+ SmallVector<unsigned, 4> UsedRegs;
+ if (LIS) {
+ for (instr_iterator I = getFirstInstrTerminator(), E = instr_end();
+ I != E; ++I) {
+ MachineInstr *MI = I;
+
+ for (MachineInstr::mop_iterator OI = MI->operands_begin(),
+ OE = MI->operands_end(); OI != OE; ++OI) {
+ if (!OI->isReg() || OI->getReg() == 0)
+ continue;
+
+ unsigned Reg = OI->getReg();
+ if (std::find(UsedRegs.begin(), UsedRegs.end(), Reg) == UsedRegs.end())
+ UsedRegs.push_back(Reg);
+ }
+ }
+ }
+
ReplaceUsesOfBlockWith(Succ, NMBB);
// If updateTerminator() removes instructions, we need to remove them from
LI.removeRange(StartIndex, EndIndex);
}
}
+
+ // Update all intervals for registers whose uses may have been modified by
+ // updateTerminator().
+ LIS->repairIntervalsInRange(this, getFirstTerminator(), end(), UsedRegs);
}
if (MachineDominatorTree *MDT =