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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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This commit is contained in:
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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22
src/midend/Pass/Optimize/SysYIRCFGOpt.cpp
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@@ -91,13 +91,11 @@ bool SysYCFGOptUtils::SysYBlockMerge(Function *func) {
auto thelastinstinst = block->end();
(--thelastinstinst);
if (thelastinstinst->get()->isUnconditional()) {
SysYIROptUtils::usedelete(thelastinstinst->get());
thelastinstinst = block->getInstructions().erase(thelastinstinst);
thelastinstinst = SysYIROptUtils::usedelete(thelastinstinst);
} else if (thelastinstinst->get()->isConditional()) {
// 如果是条件分支，判断条件是否相同，主要优化相同布尔表达式
if (thelastinstinst->get()->getOperand(1)->getName() == thelastinstinst->get()->getOperand(1)->getName()) {
SysYIROptUtils::usedelete(thelastinstinst->get());
thelastinstinst = block->getInstructions().erase(thelastinstinst);
thelastinstinst = SysYIROptUtils::usedelete(thelastinstinst);
}
}
}
@@ -164,8 +162,7 @@ bool SysYCFGOptUtils::SysYDelNoPreBLock(Function *func) {
if (!blockIter->get()->getreachable()) {
for (auto instIter = blockIter->get()->getInstructions().begin();
instIter != blockIter->get()->getInstructions().end();) {
SysYIROptUtils::usedelete(instIter->get());
instIter = blockIter->get()->getInstructions().erase(instIter);
instIter = SysYIROptUtils::usedelete(instIter);
}
}
}
@@ -306,8 +303,7 @@ bool SysYCFGOptUtils::SysYDelEmptyBlock(Function *func, IRBuilder* pBuilder) {
if (dynamic_cast<BasicBlock *>(thelastinst->get()->getOperand(1)) ==
dynamic_cast<BasicBlock *>(thelastinst->get()->getOperand(2))) {
auto thebrBlock = dynamic_cast<BasicBlock *>(thelastinst->get()->getOperand(1));
SysYIROptUtils::usedelete(thelastinst->get());
thelastinst = basicBlock->getInstructions().erase(thelastinst);
thelastinst = SysYIROptUtils::usedelete(thelastinst);
pBuilder->setPosition(basicBlock.get(), basicBlock->end());
pBuilder->createUncondBrInst(thebrBlock);
changed = true; // 标记IR被修改
@@ -345,8 +341,7 @@ bool SysYCFGOptUtils::SysYDelEmptyBlock(Function *func, IRBuilder* pBuilder) {
if (dynamic_cast<BasicBlock *>(thelastinst->get()->getOperand(1)) ==
dynamic_cast<BasicBlock *>(thelastinst->get()->getOperand(2))) {
auto thebrBlock = dynamic_cast<BasicBlock *>(thelastinst->get()->getOperand(1));
SysYIROptUtils::usedelete(thelastinst->get());
thelastinst = basicBlock->getInstructions().erase(thelastinst);
thelastinst = SysYIROptUtils::usedelete(thelastinst);
pBuilder->setPosition(basicBlock.get(), basicBlock->end());
pBuilder->createUncondBrInst(thebrBlock);
changed = true; // 标记IR被修改
@@ -425,9 +420,7 @@ bool SysYCFGOptUtils::SysYDelEmptyBlock(Function *func, IRBuilder* pBuilder) {
for (auto instIter = iter->get()->getInstructions().begin();
instIter != iter->get()->getInstructions().end();) {
SysYIROptUtils::usedelete(instIter->get()); // 仅删除 use 关系
// 显式地从基本块中删除指令并更新迭代器
instIter = iter->get()->getInstructions().erase(instIter);
instIter = SysYIROptUtils::usedelete(instIter);
}
// 删除不可达基本块的phi指令的操作数
for (auto &succ : iter->get()->getSuccessors()) {
@@ -523,8 +516,7 @@ bool SysYCFGOptUtils::SysYCondBr2Br(Function *func, IRBuilder* pBuilder) {
auto thenBlock = dynamic_cast<BasicBlock *>(thelast->get()->getOperand(1));
auto elseBlock = dynamic_cast<BasicBlock *>(thelast->get()->getOperand(2));
SysYIROptUtils::usedelete(thelast->get());
thelast = basicblock->getInstructions().erase(thelast);
thelast = SysYIROptUtils::usedelete(thelast);
if ((constfloat_Use && constfloat == 1.0F) || (constint_Use && constint == 1)) {
// cond为true或非0
pBuilder->setPosition(basicblock.get(), basicblock->end());