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First implementation of constant propagation

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Local constant variables initialized with compile-time constants
are optimized away from the code.
This commit is contained in:
Roberto Ierusalimschy
2019-07-12 11:38:42 -03:00
parent be8445d7e4
commit f6aab3ec1f
12 changed files with 249 additions and 119 deletions
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lcode.h
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@@ -56,6 +56,7 @@ LUAI_FUNC int luaK_codeAsBx (FuncState *fs, OpCode o, int A, int Bx);
LUAI_FUNC int luaK_codeABCk (FuncState *fs, OpCode o, int A,
int B, int C, int k);
LUAI_FUNC int luaK_isKint (expdesc *e);
LUAI_FUNC int luaK_exp2const (FuncState *fs, const expdesc *e, TValue *v);
LUAI_FUNC void luaK_fixline (FuncState *fs, int line);
LUAI_FUNC void luaK_nil (FuncState *fs, int from, int n);
LUAI_FUNC void luaK_reserveregs (FuncState *fs, int n);