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[midend]适应上一次commit修改已有优化遍中相关指令删除的代码

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rain2133
2025-07-31 21:10:59 +08:00
parent ef09bc70d4
commit 9a53e1b917
4 changed files with 13 additions and 26 deletions
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10
src/midend/Pass/Optimize/Mem2Reg.cpp
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@@ -240,10 +240,9 @@ void Mem2RegContext::renameVariables(AllocaInst *currentAlloca, BasicBlock *curr
// loadInst->getPointer() 返回 AllocaInst*
// 将 LoadInst 的所有用途替换为当前 alloca 值栈顶部的 SSA 值
assert(!allocaToValueStackMap[alloca].empty() && "Value stack empty for alloca during load replacement!");
std::cout << "Mem2Reg: Replacing load " << loadInst->getPointer()->getName() << " with SSA value." << std::endl;
loadInst->replaceAllUsesWith(allocaToValueStackMap[alloca].top());
// instIter = currentBB->force_delete_inst(loadInst); // 删除 LoadInst
SysYIROptUtils::usedelete(loadInst); // 仅删除 use 关系
instIter = currentBB->getInstructions().erase(instIter); // 删除 LoadInst
instIter = SysYIROptUtils::usedelete(instIter);
instDeleted = true;
// std::cerr << "Mem2Reg: Replaced load " << loadInst->name() << " with SSA value." << std::endl;
break;
@@ -257,10 +256,10 @@ void Mem2RegContext::renameVariables(AllocaInst *currentAlloca, BasicBlock *curr
if (storeInst->getPointer() == alloca) {
// 假设 storeInst->getPointer() 返回 AllocaInst*
// 将 StoreInst 存储的值作为新的 SSA 值，压入值栈
std::cout << "Mem2Reg: Replacing store to " << storeInst->getPointer()->getName() << " with SSA value." << std::endl;
allocaToValueStackMap[alloca].push(storeInst->getValue());
localStackPushed.push(storeInst->getValue()); // 记录以便弹出
SysYIROptUtils::usedelete(storeInst);
instIter = currentBB->getInstructions().erase(instIter); // 删除 StoreInst
instIter = SysYIROptUtils::usedelete(instIter);
instDeleted = true;
// std::cerr << "Mem2Reg: Replaced store to " << storeInst->ptr()->name() << " with SSA value." << std::endl;
break;
@@ -327,7 +326,6 @@ void Mem2RegContext::cleanup() {
if (alloca && alloca->getParent()) {
// 删除 alloca 指令本身
SysYIROptUtils::usedelete(alloca);
alloca->getParent()->removeInst(alloca); // 从基本块中删除 alloca
// std::cerr << "Mem2Reg: Deleted alloca " << alloca->name() << std::endl;
}