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2022fall-Compiler_CMinus
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李晓奇
2022fall-Compiler_CMinus
Commits
28a084f5
Commit
28a084f5
authored
Nov 18, 2022
by
陈清源
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update doc about dom & phi
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2f5d0fa7
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Documentations/4.1-ssa/README.md
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Documentations/4.1-ssa/README.md
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28a084f5
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@@ -70,7 +70,10 @@ label_entry:
**Note:**
1.
更详细的 SSA 格式的细节请仔细阅读
[
附件
](
./ssa.pdf
)
。
2.
我们的实验设计从编译器前端分离了构造 SSA 过程,使用
`alloca`
来分配局部变量,保留了局部变量的访存操作,用 Mem2Reg Pass 来实现构造 SSA 的算法,这是保持了与 LLVM 一致的策略。
2.
补充附件中的概念:
-
支配性:在入口节点为 b0 的流图中,当且仅当 bi 位于从 b0 到 bj 的每条路径上时,结点 bi 支配结点 bj。
-
Dom(bi) 集合:该集合包含了支配 bi 的所有结点的名字。
3.
我们的实验设计从编译器前端分离了构造 SSA 过程,使用
`alloca`
来分配局部变量,保留了局部变量的访存操作,用 Mem2Reg Pass 来实现构造 SSA 的算法,这是保持了与 LLVM 一致的策略。
#### 1.1.2 Mem2Reg Pass 代码阅读
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Documentations/4.1-ssa/ssa.pdf
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