[optimze]添加基础的除法指令优化，目前只对除以2的幂数生效

2025-08-03 13:46:42 +08:00
parent e8699d6d25
commit f312792fe9
10 changed files with 419 additions and 6 deletions
--- a/src/backend/RISCv64/RISCv64Backend.cpp
+++ b/src/backend/RISCv64/RISCv64Backend.cpp
@@ -119,7 +119,11 @@ std::string RISCv64CodeGen::function_gen(Function* func) {
    RISCv64AsmPrinter printer1(mfunc.get());
    printer1.run(ss1, true);

-    // 阶段 2: 指令调度 (Instruction Scheduling)
+    // 阶段 2: 除法强度削弱优化 (Division Strength Reduction)
+    DivStrengthReduction div_strength_reduction;
+    div_strength_reduction.runOnMachineFunction(mfunc.get());
+
+    // 阶段 2.1: 指令调度 (Instruction Scheduling)
    PreRA_Scheduler scheduler;
    scheduler.runOnMachineFunction(mfunc.get());