50 lines
1.3 KiB
C++
50 lines
1.3 KiB
C++
#ifndef POST_RA_SCHEDULER_H
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#define POST_RA_SCHEDULER_H
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#include "RISCv64LLIR.h"
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#include "Pass.h"
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namespace sysy {
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/**
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* @class PostRA_Scheduler
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* @brief 寄存器分配后的局部指令调度器
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* * 主要目标是优化寄存器分配器插入的spill/fill代码(lw/sw)，
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* 尝试将加载指令提前，以隐藏其访存延迟。
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*/
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struct MemoryAccess {
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PhysicalReg base_reg;
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int64_t offset;
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bool valid;
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MemoryAccess() : valid(false) {}
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MemoryAccess(PhysicalReg base, int64_t off) : base_reg(base), offset(off), valid(true) {}
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};
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struct InstrRegInfo {
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std::unordered_set<PhysicalReg> defined_regs;
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std::unordered_set<PhysicalReg> used_regs;
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bool is_load;
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bool is_store;
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bool is_control_flow;
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MemoryAccess mem_access;
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InstrRegInfo() : is_load(false), is_store(false), is_control_flow(false) {}
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};
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class PostRA_Scheduler : public Pass {
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public:
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static char ID;
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PostRA_Scheduler() : Pass("post-ra-scheduler", Granularity::Function, PassKind::Optimization) {}
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void *getPassID() const override { return &ID; }
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bool runOnFunction(Function *F, AnalysisManager& AM) override;
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void runOnMachineFunction(MachineFunction* mfunc);
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};
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} // namespace sysy
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#endif // POST_RA_SCHEDULER_H
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