gh0s7/mysysy
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

[backend]微优化与可读性维护不影响原逻辑和分数

Browse Source
This commit is contained in:
CGH0S7
2025-07-31 11:23:17 +08:00
parent b3cf3cba29
commit 807fb3f560
3 changed files with 49 additions and 55 deletions
Download Patch File Download Diff File Expand all files Collapse all files

34
src/backend/RISCv64/RISCv64RegAlloc.cpp
View File

@@ -398,13 +398,15 @@ void RISCv64RegAlloc::getInstrUseDef(MachineInstr* instr, LiveSet& use, LiveSet&
}
} else { // [修复] CALL指令也可能定义物理寄存器（如a0）
if (first_reg_operand_is_def) {
if (preg_to_vreg_id_map.count(reg_op->getPReg())) {
def.insert(preg_to_vreg_id_map.at(reg_op->getPReg()));
}
auto it = preg_to_vreg_id_map.find(reg_op->getPReg());
if (it != preg_to_vreg_id_map.end()) {
def.insert(it->second);
}
first_reg_operand_is_def = false;
} else {
if (preg_to_vreg_id_map.count(reg_op->getPReg())) {
use.insert(preg_to_vreg_id_map.at(reg_op->getPReg()));
auto it = preg_to_vreg_id_map.find(reg_op->getPReg());
if (it != preg_to_vreg_id_map.end()) {
use.insert(it->second);
}
}
}
@@ -444,9 +446,10 @@ void RISCv64RegAlloc::getInstrUseDef(MachineInstr* instr, LiveSet& use, LiveSet&
if (reg_op->isVirtual()) {
def.insert(reg_op->getVRegNum());
} else { // 物理寄存器也可以是 Def
if (preg_to_vreg_id_map.count(reg_op->getPReg())) {
def.insert(preg_to_vreg_id_map.at(reg_op->getPReg()));
}
auto it = preg_to_vreg_id_map.find(reg_op->getPReg());
if (it != preg_to_vreg_id_map.end()) {
def.insert(it->second);
}
}
first_reg_is_def = false; // **关键**：处理完第一个寄存器后，立即更新标志
} else {
@@ -454,8 +457,9 @@ void RISCv64RegAlloc::getInstrUseDef(MachineInstr* instr, LiveSet& use, LiveSet&
if (reg_op->isVirtual()) {
use.insert(reg_op->getVRegNum());
} else { // 物理寄存器也可以是 Use
if (preg_to_vreg_id_map.count(reg_op->getPReg())) {
use.insert(preg_to_vreg_id_map.at(reg_op->getPReg()));
auto it = preg_to_vreg_id_map.find(reg_op->getPReg());
if (it != preg_to_vreg_id_map.end()) {
use.insert(it->second);
}
}
}
@@ -467,8 +471,9 @@ void RISCv64RegAlloc::getInstrUseDef(MachineInstr* instr, LiveSet& use, LiveSet&
use.insert(base_reg->getVRegNum());
} else {
PhysicalReg preg = base_reg->getPReg();
if (preg_to_vreg_id_map.count(preg)) {
use.insert(preg_to_vreg_id_map.at(preg));
auto it = preg_to_vreg_id_map.find(preg);
if (it != preg_to_vreg_id_map.end()) {
use.insert(it->second);
}
}
@@ -480,8 +485,9 @@ void RISCv64RegAlloc::getInstrUseDef(MachineInstr* instr, LiveSet& use, LiveSet&
if (src_reg_op->isVirtual()) {
use.insert(src_reg_op->getVRegNum());
} else {
if (preg_to_vreg_id_map.count(src_reg_op->getPReg())) {
use.insert(preg_to_vreg_id_map.at(src_reg_op->getPReg()));
auto it = preg_to_vreg_id_map.find(src_reg_op->getPReg());
if (it != preg_to_vreg_id_map.end()) {
use.insert(it->second);
}
}
}