public void buildIG(ControlFlowGraph cfg) {
BasicBlock curBB = null;
Set<SSA> live = new HashSet<SSA>();
curBB = cfg.getFirstBlock();
this.buildIGRecursive(curBB, live);
for (BasicBlock bb : cfg.getFirstBlockOfFuncs()) {
curBB = bb;
this.buildIGRecursive(curBB, live);
}
}
private void insertSpillCode(Cluster x) {
for (int i = 0; i < x.getSSAList().size(); i++) {
Instruction assignInst = ControlFlowGraph.getInstruction(x.getSSAList().get(i).getVersion());
BasicBlock blockOfAssign = ControlFlowGraph.findBlockOf(assignInst);
Operand storeAddr = Operand.makeConst(spillMemory);
if (assignInst.getOperand1().kind == Operand.constant) {
Operand temp = Operand.makeReg(25);
Instruction store = Instruction.noUseInstruction(Instruction.store, temp, storeAddr);
store.setId(assignInst.getId());
blockOfAssign.replaceInst(assignInst, store);
Instruction move =
Instruction.noUseInstruction(Instruction.move, assignInst.getOperand1(), temp);
move.setId(store.getId() - 1);
blockOfAssign.insertBefore(store, move);
} else {
Instruction store =
Instruction.noUseInstruction(Instruction.store, assignInst.getOperand1(), storeAddr);
store.setId(assignInst.getId());
blockOfAssign.replaceInst(assignInst, store);
}
for (Operand use : x.getSSAList().get(i).getUseChain()) {
Instruction useInst = ControlFlowGraph.getInstruction(use.inst);
if (useInst != null && use.inst != x.getSSAList().get(i).getVersion()) {
BasicBlock blockOfUse = ControlFlowGraph.findBlockOf(useInst);
Operand loadAddr = Operand.makeConst(spillMemory);
Operand loadTemp = Operand.makeReg(26);
Instruction load = Instruction.noUseInstruction(Instruction.load, loadAddr, loadTemp);
blockOfUse.insertBefore(useInst, load);
if (useInst.getOperand1() != null && useInst.getOperand1().ssa == x.getSSAList().get(i)) {
useInst.setOperand1(loadTemp);
}
if (useInst.getOperand2() != null && useInst.getOperand2().ssa == x.getSSAList().get(i)) {
useInst.setOperand2(loadTemp);
}
}
}
}
}
