134 lines
4.3 KiB
C++
134 lines
4.3 KiB
C++
#pragma once
|
|
#include <memory>
|
|
#include <string>
|
|
#include <unordered_map>
|
|
#include <vector>
|
|
#include "IR/IR_basic.h"
|
|
#include "cfg.h"
|
|
#include "liveanalysis.h"
|
|
|
|
namespace OptBackend {
|
|
class RISCVAsmItemBase {
|
|
public:
|
|
RISCVAsmItemBase() = default;
|
|
virtual ~RISCVAsmItemBase() = default;
|
|
virtual void RecursivePrint(std::ostream &os) const = 0;
|
|
};
|
|
class RISCVConstStrItem : public RISCVAsmItemBase {
|
|
public:
|
|
std::string full_label;
|
|
std::string content;
|
|
RISCVConstStrItem() = default;
|
|
~RISCVConstStrItem() = default;
|
|
void RecursivePrint(std::ostream &os) const override {
|
|
os << full_label << ":\n";
|
|
os << " .asciz \"";
|
|
for (auto c : content) {
|
|
if (c == '\n') {
|
|
os << "\\n";
|
|
} else if (c == '\t') {
|
|
os << "\\t";
|
|
} else if (c == '\"') {
|
|
os << "\\\"";
|
|
} else if (c == '\\') {
|
|
os << "\\\\";
|
|
} else {
|
|
os << c;
|
|
}
|
|
}
|
|
os << "\"\n";
|
|
}
|
|
};
|
|
class RISCVGlobalVarItem : public RISCVAsmItemBase {
|
|
public:
|
|
std::string full_label;
|
|
RISCVGlobalVarItem() = default;
|
|
~RISCVGlobalVarItem() = default;
|
|
void RecursivePrint(std::ostream &os) const override {
|
|
os << ".globl " << full_label << "\n";
|
|
os << ".p2align 2, 0x0\n";
|
|
os << full_label << ":\n";
|
|
os << " .word 0\n";
|
|
}
|
|
};
|
|
class RISCVFuncItem : public RISCVAsmItemBase {
|
|
public:
|
|
std::string full_label;
|
|
std::vector<std::string> code_lines;
|
|
RISCVFuncItem() = default;
|
|
~RISCVFuncItem() = default;
|
|
void RecursivePrint(std::ostream &os) const override {
|
|
os << ".globl " << full_label << "\n";
|
|
os << ".p2align 2, 0x0\n";
|
|
os << full_label << ":\n";
|
|
for (auto &line : code_lines) {
|
|
os << line << "\n";
|
|
}
|
|
}
|
|
};
|
|
class RISCVProgItem : public RISCVAsmItemBase {
|
|
public:
|
|
std::vector<std::shared_ptr<RISCVConstStrItem>> const_strs;
|
|
std::vector<std::shared_ptr<RISCVGlobalVarItem>> global_vars;
|
|
std::vector<std::shared_ptr<RISCVFuncItem>> funcs;
|
|
RISCVProgItem() = default;
|
|
~RISCVProgItem() = default;
|
|
void RecursivePrint(std::ostream &os) const override {
|
|
os << ".section .rodata\n";
|
|
for (auto &item : const_strs) {
|
|
item->RecursivePrint(os);
|
|
}
|
|
os << ".section .sbss\n";
|
|
for (auto &item : global_vars) {
|
|
item->RecursivePrint(os);
|
|
}
|
|
os << ".section .text\n";
|
|
for (auto &item : funcs) {
|
|
item->RecursivePrint(os);
|
|
}
|
|
}
|
|
};
|
|
class FuncLayout {
|
|
public:
|
|
std::unordered_map<std::string, size_t> local_items;
|
|
std::unordered_map<std::string, size_t> arg_offset;
|
|
size_t cur_pos;
|
|
size_t total_frame_size; // should align to 16 bytes
|
|
|
|
FuncLayout() : cur_pos(12), total_frame_size(16) {}
|
|
void AllocateItem(const std::string &name, size_t sz, size_t num = 1) {
|
|
if (local_items.find(name) != local_items.end()) throw std::runtime_error("Local item already exists");
|
|
if (cur_pos % sz != 0) {
|
|
cur_pos += sz - cur_pos % sz;
|
|
}
|
|
cur_pos += sz * num;
|
|
local_items[name] = cur_pos;
|
|
total_frame_size = ((cur_pos + 15) / 16) * 16;
|
|
std::cerr << "allocating stack memory for " << name << " at " << cur_pos << std::endl;
|
|
}
|
|
size_t QueryOffeset(const std::string &name) {
|
|
if (local_items.find(name) == local_items.end()) throw std::runtime_error("Local item not found");
|
|
return local_items[name];
|
|
}
|
|
size_t QueryFrameSize() const { return total_frame_size; }
|
|
};
|
|
|
|
inline void StoreImmToReg(int imm, std::string reg, std::vector<std::string> &code_lines) {
|
|
code_lines.push_back("li " + reg + ", " + std::to_string(imm));
|
|
}
|
|
|
|
void GenerateOptASM(std::ostream &os, std::shared_ptr<ModuleItem> prog);
|
|
|
|
std::string AllocateTmpReg(std::vector<std::string> &available_tmp_regs);
|
|
|
|
std::string ExtractRegName(const std::string &raw);
|
|
|
|
void FetchValueToReg(std::string original_val, std::string &out_reg, FuncLayout &layout,
|
|
std::vector<std::string> &code_lines, std::vector<std::string> &available_tmp_regs);
|
|
|
|
void WriteToSpilledVar(std::string val, std::string reg, FuncLayout &layout, std::vector<std::string> &code_lines,
|
|
std::vector<std::string> &available_tmp_regs);
|
|
size_t CalcSize(const LLVMType &tp);
|
|
void GenerateASM(std::shared_ptr<ActionItem> act, std::vector<std::string> &code_lines, FuncLayout &layout,
|
|
const std::unordered_map<std::string, IRClassInfo> &low_level_class_info);
|
|
} // namespace OptBackend
|