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bug fix on hidden case

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This commit is contained in:
ridethepig 2023-06-18 19:53:09 +08:00
parent 4470c97411
commit 2ec8ff8ed5
4 changed files with 8 additions and 8 deletions
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3
.vscode/launch.json vendored
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@ -10,7 +10,8 @@
"name": "Debug",
"program": "${workspaceFolder}/build/sysy",
// "args": ["../sysytests/functional_2021/069_greatest_common_divisor.sy", "-S", "-o", "build/my.s", "-O1", "-emit-llvm"],
"args" : ["-S", "../sysytests/functional_2022/21_if_test2.sy", "-o", "build/dbg.s", "-emit-llvm", "-O1",],
// "args" : ["-S", "../sysytests/functional_2022/21_if_test2.sy", "-o", "build/dbg.s", "-emit-llvm", "-O1",],
"args" : ["-S", "../sysytests/functional_h_2022/04_break_continue.sy", "-o", "build/dbg.s", "-emit-llvm", "-O1",],
"cwd": "${workspaceFolder}"
},
]

4
src/pass_const_fold.cpp
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@ -22,9 +22,9 @@ static InstBranch *is_cond_br(Instruction *inst) {
// not removing the block, this only means that pred no longer branch to bb
static void rewrite_bb(sptr(BasicBlock) bb, sptr(BasicBlock) pred) {
pred->succ_list.remove(bb);
pred->succ_list.erase(STD_FIND(pred->succ_list, bb));
auto pred_index = GETINDEX(bb->pred_list, pred);
bb->pred_list.remove(pred);
bb->pred_list.erase(STD_FIND(bb->pred_list, pred));
for (auto itr = bb->inst_list.begin(); itr != bb->inst_list.end();) {
auto inst = *itr++;
if (!shared_cast<InstPhi>(inst)) break;

4
src/pass_const_prop.cpp
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@ -259,9 +259,9 @@ void PassSCCP::Visit_Inst(Instruction *inst) {
pred is no more bb's pred, so maintain cfg and rewrite bb's phi nodes
*/
static void rewrite_bb(sptr(BasicBlock) bb, sptr(BasicBlock) pred) {
pred->succ_list.remove(bb);
pred->succ_list.erase(STD_FIND(pred->succ_list, bb));
auto pred_index = GETINDEX(bb->pred_list, pred);
bb->pred_list.remove(pred);
bb->pred_list.erase(STD_FIND(bb->pred_list, pred));
for (auto itr = bb->inst_list.begin(); itr != bb->inst_list.end();) {
auto inst = *itr++;
if (!shared_cast<InstPhi>(inst)) break;

5
src/pass_dce.cpp
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@ -141,7 +141,7 @@ bool Elim_Dead_Code(Function *func) {
// Still unknown what this would be like, the only case by now is
// true_branch = false_branch
changed = true;
LOG(WARNING) << "rewrite dead branch";
LOG(WARNING) << "rewrite dead branch in " << bb->to_string();
auto cfgnode = RCFG.bb_node.at(bb.get());
// walk up through the dom-tree(idom), and check if there is any useful insts in it
auto useful_pdom = cfgnode->idom;
@ -191,7 +191,6 @@ bool Fuse_Block(Function *func) {
visit.clear(); post_order.clear();
get_post_order(func->bb_list.front().get());
for (auto bb : post_order) {
LOG(DEBUG) << "visit " << bb->to_string();
if (is_branch(bb->inst_list.back().get())) {
auto inst = bb->inst_list.back().get();
if (inst->operand_list[1] == inst->operand_list[2]) {
@ -305,7 +304,7 @@ void PassDCE::run(const Module &module) {
Elim_Dead_Code(func.get());
Elim_Unreach_Code(func.get());
other_clear(func.get());
// Fuse_Block(func.get());
Fuse_Block(func.get());
}
}