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lzkk b3187edbbf perf(mir): MIR 清扫——%2指令精简 + 算术select死代码消除 ... - %2快速路径：and+cmp+csneg ge（3指令）替代 negs+and+and+csneg mi（4指令） - 穿透Inline中 icmp ne(zext(cmp),0) 冗余链，消除算术select的mov+cmp+cset冗余 - Madd折叠前移：Mul唯一用户是Add时跳过，由Add的Madd统一处理 - Div/Mod/And/Or常量提前处理，避免emit不消费的死MovImm 门禁：functional 99/100（95_float预存失败），h_functional 40/40		3 days ago
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antlr4	fix: 补全缺失的头文件目录	3 weeks ago
frontend	Fix undefined behavior: signed overflow, negative left shift, float-to-int overflow	3 weeks ago
include	perf(ir): 添加 And/Or 操作码 + if-else→select 转换框架	3 days ago
ir	perf(mir): MIR 清扫——%2指令精简 + 算术select死代码消除	3 days ago
irgen	fix(irgen): starttime/stoptime 函数名恢复为 _sysy_starttime/_sysy_stoptime	3 days ago
mir	perf(mir): MIR 清扫——%2指令精简 + 算术select死代码消除	3 days ago
sem	chore: 移除空桩文件（PassManager.cpp/ConstEval.cpp）从构建	3 days ago
utils	fix(mir): 线性扫描活变量分析 def 位置记录 + callee-saved 寄存器限定 + CLI 标志修复	5 days ago
CMakeLists.txt	已实现基本标量优化，实现部分寄存器优化	3 weeks ago
main.cpp	perf(mir): MIR预分配 MovImm 转发——消除常数二次传递	3 days ago