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lzkk
fccd935a24
feat(backend): 新增 AddImm/SubImm 操作码，消除冗余 MovImm
AArch64 add/sub 支持 12 位立即数，但 MIR 只有 AddRR/SubRR，
导致 RHS 为常量时需先 MovImm 再 RR 运算。本次修改：
- MIR.h：新增 AddImm、SubImm 操作码
- Lowering.cpp：Add/Sub 降级时 RHS 为 0-4095 常量直接用 AddImm/SubImm
- RegAlloc.cpp：AddImm/SubImm 复用 AddRR/SubRR 的 def-use 分析
- AsmPrinter.cpp：通用打印机自动处理 Imm 操作数（#value）
效果（对比 CmpImm 基线）：
- sl1-3: 261→247 (-14, -5.4%)
- huffman-01-03: 792→790 (-2)
- h-5-01-03: 341→338 (-3)
- 全 60 个性能用例总减少 55 行
- 功能测试 0 新故障
更新：优化记录.md 新增条目，基线自动更新
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7 days ago |
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antlr4
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fix: 补全缺失的头文件目录
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3 weeks ago |
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frontend
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Fix undefined behavior: signed overflow, negative left shift, float-to-int overflow
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3 weeks ago |
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include
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feat(backend): 新增 AddImm/SubImm 操作码，消除冗余 MovImm
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7 days ago |
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ir
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feat(mem2reg): tune PHI threshold to allow Mem2Reg on moderate functions\n\nChange phi_threshold from max(50, block_count) to max(100, block_count*2).\nThe old threshold was too conservative for functions with many allocas\nlike many_mat_cal (~15 allocas, 60 blocks), causing premature skip.\nThe new threshold allows these while still blocking crypto-like functions\nwhere excessive PHI nodes hurt code quality.\n\nmany_mat_cal: -91 lines, matmul: -84 lines, h-8: -97 lines
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1 week ago |
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irgen
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Fix starttime/stoptime function name and add line number parameter
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3 weeks ago |
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mir
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feat(backend): 新增 AddImm/SubImm 操作码，消除冗余 MovImm
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7 days ago |
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sem
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Fix undefined behavior: signed overflow, negative left shift, float-to-int overflow
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3 weeks ago |
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utils
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Fix undefined behavior: signed overflow, negative left shift, float-to-int overflow
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3 weeks ago |
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CMakeLists.txt
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已实现基本标量优化，实现部分寄存器优化
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3 weeks ago |
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main.cpp
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实现循环优化：LICM、强度削弱、循环展开、循环分裂
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2 weeks ago |
