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'lineinfo' in prototypes saved as differences instead of absolute

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values, so that the array can use bytes instead of ints, reducing
its size. (A new array 'abslineinfo' is used when line differences
do not fit in a byte.)
This commit is contained in:
Roberto Ierusalimschy
2017-06-27 08:35:31 -03:00
parent 60a7492d24
commit b42430fd3a
11 changed files with 195 additions and 33 deletions
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13
lparser.c
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@@ -1,5 +1,5 @@
/*
** $Id: lparser.c,v 2.158 2017/04/29 18:09:17 roberto Exp roberto $
** $Id: lparser.c,v 2.159 2017/05/13 12:57:20 roberto Exp roberto $
** Lua Parser
** See Copyright Notice in lua.h
*/
@@ -527,22 +527,24 @@ static void codeclosure (LexState *ls, expdesc *v) {
static void open_func (LexState *ls, FuncState *fs, BlockCnt *bl) {
Proto *f;
Proto *f = fs->f;
fs->prev = ls->fs; /* linked list of funcstates */
fs->ls = ls;
ls->fs = fs;
fs->pc = 0;
fs->previousline = f->linedefined;
fs->iwthabs = 0;
fs->lasttarget = 0;
fs->jpc = NO_JUMP;
fs->freereg = 0;
fs->nk = 0;
fs->nabslineinfo = 0;
fs->np = 0;
fs->nups = 0;
fs->nlocvars = 0;
fs->nactvar = 0;
fs->firstlocal = ls->dyd->actvar.n;
fs->bl = NULL;
f = fs->f;
f->source = ls->source;
f->maxstacksize = 2; /* registers 0/1 are always valid */
enterblock(fs, bl, 0);
@@ -557,8 +559,11 @@ static void close_func (LexState *ls) {
leaveblock(fs);
luaM_reallocvector(L, f->code, f->sizecode, fs->pc, Instruction);
f->sizecode = fs->pc;
luaM_reallocvector(L, f->lineinfo, f->sizelineinfo, fs->pc, int);
luaM_reallocvector(L, f->lineinfo, f->sizelineinfo, fs->pc, ls_byte);
f->sizelineinfo = fs->pc;
luaM_reallocvector(L, f->abslineinfo, f->sizeabslineinfo,
fs->nabslineinfo, AbsLineInfo);
f->sizeabslineinfo = fs->nabslineinfo;
luaM_reallocvector(L, f->k, f->sizek, fs->nk, TValue);
f->sizek = fs->nk;
luaM_reallocvector(L, f->p, f->sizep, fs->np, Proto *);