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[midend-SCCP]修改BaiscBlock的析构逻辑，将CFG修改的职责交给优化遍,注释Mem2Reg的调试信息。

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rain2133
2025-08-01 01:44:33 +08:00
parent 0f1fcc835d
commit c268191826
3 changed files with 29 additions and 10 deletions
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12
src/midend/Pass/Optimize/Mem2Reg.cpp
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@@ -240,7 +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;
if(DEBUG){
std::cout << "Mem2Reg: Replacing load " << loadInst->getPointer()->getName() << " with SSA value." << std::endl;
}
loadInst->replaceAllUsesWith(allocaToValueStackMap[alloca].top());
instIter = SysYIROptUtils::usedelete(instIter);
instDeleted = true;
@@ -256,7 +258,9 @@ 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;
if(DEBUG){
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
instIter = SysYIROptUtils::usedelete(instIter);
@@ -297,7 +301,9 @@ void Mem2RegContext::renameVariables(AllocaInst *currentAlloca, BasicBlock *curr
if(dominatedBlocks){
for (auto dominatedBB : *dominatedBlocks) {
if (dominatedBB) {
std::cout << "Mem2Reg: Recursively renaming variables in dominated block: " << dominatedBB->getName() << std::endl;
if(DEBUG){
std::cout << "Mem2Reg: Recursively renaming variables in dominated block: " << dominatedBB->getName() << std::endl;
}
renameVariables(currentAlloca, dominatedBB);
}
}