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[IRPrinter&DCE]修改定义方便调试打印，在DEC中增加调试信息

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This commit is contained in:
rain2133
2025-07-16 13:04:05 +08:00
parent 3419f84898
commit 50fd9cffe9
3 changed files with 38 additions and 8 deletions
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29
src/DeadCodeElimination.cpp
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@@ -1,8 +1,9 @@
#include "DeadCodeElimination.h"
#include <iostream>
extern int DEBUG;
namespace sysy {
void DeadCodeElimination::runDCEPipeline() {
const auto& functions = pModule->getFunctions();
for (const auto& function : functions) {
@@ -58,6 +59,10 @@ void DeadCodeElimination::eliminateDeadStores(Function* func, bool& changed) {
if (changetag) {
changed = true;
if(DEBUG){
std::cout << "=== Dead Store Found ===\n";
SysYPrinter::printInst(storeInst);
}
usedelete(storeInst);
iter = instrs.erase(iter);
} else {
@@ -76,6 +81,10 @@ void DeadCodeElimination::eliminateDeadLoads(Function* func, bool& changed) {
if (inst->isBinary() || inst->isUnary() || inst->isLoad()) {
if (inst->getUses().empty()) {
changed = true;
if(DEBUG){
std::cout << "=== Dead Load Binary Unary Found ===\n";
SysYPrinter::printInst(inst);
}
usedelete(inst);
iter = instrs.erase(iter);
continue;
@@ -101,6 +110,10 @@ void DeadCodeElimination::eliminateDeadAllocas(Function* func, bool& changed) {
func->getEntryBlock()->getArguments().end(),
allocaInst) == func->getEntryBlock()->getArguments().end()) {
changed = true;
if(DEBUG){
std::cout << "=== Dead Alloca Found ===\n";
SysYPrinter::printInst(inst);
}
usedelete(inst);
iter = instrs.erase(iter);
continue;
@@ -118,6 +131,10 @@ void DeadCodeElimination::eliminateDeadIndirectiveAllocas(Function* func, bool&
auto &allocaInst = *it;
if (allocaInst->getUses().empty()) {
changed = true;
if(DEBUG){
std::cout << "=== Dead Indirect Alloca Found ===\n";
SysYPrinter::printInst(allocaInst.get());
}
it = funcInfo->getIndirectAllocas().erase(it);
} else {
++it;
@@ -132,6 +149,10 @@ void DeadCodeElimination::eliminateDeadGlobals(bool& changed) {
auto& global = *it;
if (global->getUses().empty()) {
changed = true;
if(DEBUG){
std::cout << "=== Dead Global Found ===\n";
SysYPrinter::printValue(global.get());
}
it = globals.erase(it);
} else {
++it;
@@ -207,6 +228,12 @@ void DeadCodeElimination::eliminateDeadRedundantLoadStore(Function* func, bool&
// 可以优化直接把prevStorePointer的值存到nextStorePointer
changed = true;
nextStore->setOperand(0, prevStoreValue);
if(DEBUG){
std::cout << "=== Dead Store Load Store Found(now only del Load) ===\n";
SysYPrinter::printInst(prevStore);
SysYPrinter::printInst(loadInst);
SysYPrinter::printInst(nextStore);
}
usedelete(loadInst);
iter = instrs.erase(iter);
// 删除 prevStore 这里是不是可以留给删除无用store处理？

2
src/include/DeadCodeElimination.h
View File

@@ -2,6 +2,8 @@
#include "IR.h"
#include "SysYIRAnalyser.h"
#include "SysYIRPrinter.h"
namespace sysy {
class DeadCodeElimination {

13
src/include/SysYIRPrinter.h
View File

@@ -15,15 +15,16 @@ public:
public:
void printIR();
void printGlobalVariable();
void printFunction(Function *function);
void printInst(Instruction *pInst);
void printType(Type *type);
void printValue(Value *value);
public:
static void printFunction(Function *function);
static void printInst(Instruction *pInst);
static void printType(Type *type);
static void printValue(Value *value);
static std::string getOperandName(Value *operand);
std::string getTypeString(Type *type);
std::string getValueName(Value *value);
static std::string getTypeString(Type *type);
static std::string getValueName(Value *value);
};
} // namespace sysy