forked from NUDT-compiler/nudt-compiler-cpp
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49 lines
1.7 KiB
49 lines
1.7 KiB
# 模拟帧槽分配
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num_params = 390
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num_reg_params = 8
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# 模拟 LowerFunctionParams 中的帧槽分配
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frame_slots = []
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for param_idx in range(num_params):
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# 创建参数帧槽
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param_slot = len(frame_slots)
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frame_slots.append({"type": "param", "param_idx": param_idx, "is_stack_arg": False})
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# 如果参数在栈上，创建 callee_stack_arg 帧槽
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if param_idx >= num_reg_params:
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frame_slots.append({"type": "callee_stack_arg", "param_idx": param_idx, "is_stack_arg": True})
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# 模拟 alloca 指令处理中的帧槽分配
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# 假设有 390 个 alloca 指令
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num_alloca = 390
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for alloca_idx in range(num_alloca):
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frame_slots.append({"type": "alloca", "alloca_idx": alloca_idx, "is_stack_arg": False})
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print(f"总帧槽数量: {len(frame_slots)}")
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# 计算 FrameLowering 中的偏移
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local_cursor = 0
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stack_arg_cursor = 0
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for i, slot in enumerate(frame_slots):
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if slot["is_stack_arg"]:
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slot["offset"] = stack_arg_cursor
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stack_arg_cursor += 8
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else:
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local_cursor += 4
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slot["offset"] = -local_cursor
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# 找到第 221 和 222 个参数的帧槽
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for i, slot in enumerate(frame_slots):
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if slot["type"] == "param" and slot["param_idx"] in [220, 221]:
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print(f"\n参数索引 {slot['param_idx']} (第 {slot['param_idx']+1} 个参数):")
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print(f" 帧槽索引: {i}")
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print(f" 帧槽偏移: {slot['offset']}")
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# 找到第 221 和 222 个 alloca 的帧槽
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for i, slot in enumerate(frame_slots):
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if slot["type"] == "alloca" and slot["alloca_idx"] in [220, 221]:
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print(f"\nAlloca 索引 {slot['alloca_idx']} (第 {slot['alloca_idx']+1} 个 alloca):")
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print(f" 帧槽索引: {i}")
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print(f" 帧槽偏移: {slot['offset']}")
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