pedroediaz/lexvm
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

use memcpy

Browse Source 
compiler assumes there might be overlap, this is incorrect.
calling memcpy directly allows for better codegen
This commit is contained in:
Kyryl Melekhin
2021-10-08 18:34:18 +00:00
parent 541d881b4f
commit 364e04a0f9
1 changed files with 5 additions and 5 deletions
Download Patch File Download Diff File Expand all files Collapse all files

10
pike.c
View File

@@ -480,12 +480,12 @@ subs[i++] = nsub; \
goto next##nn; \
#define saveclist() \
newsub(for (j = 0; j < nsubp; j++) s1->sub[j] = nsub->sub[j];, \
for (j = 0; j < nsubp / 2 - 1; j++) s1->sub[j] = nsub->sub[j];) \
newsub(memcpy(s1->sub, nsub->sub, osubp);, \
memcpy(s1->sub, nsub->sub, osubp / 2);) \
#define savenlist() \
newsub(/*nop*/, /*nop*/) \
for (j = 0; j < nsubp; j++) s1->sub[j] = nsub->sub[j]; \
memcpy(s1->sub, nsub->sub, osubp); \
#define onnlist(nn) \
if (npc[2] == gen) \
@@ -562,7 +562,7 @@ int re_pikevm(rcode *prog, const char *s, const char **subp, int nsubp)
{
int rsubsize = sizeof(rsub)+(sizeof(char*)*nsubp);
int i, j, c, gen, suboff = rsubsize, *npc;
int clistidx = 0, nlistidx = 0;
int clistidx = 0, nlistidx = 0, osubp = nsubp * sizeof(char*);
const char *sp = s, *_sp = s;
int *insts = prog->insts;
int *pcs[prog->splits];
@@ -611,7 +611,7 @@ int re_pikevm(rcode *prog, const char *s, const char **subp, int nsubp)
nlistidx = 0;
if (!matched) {
jmp_start:
newsub(for (i = 1; i < nsubp; i++) s1->sub[i] = NULL;, /*nop*/)
newsub(memset(s1->sub, 0, osubp);, /*nop*/)
s1->ref = 1;
s1->sub[0] = _sp;
nsub = s1;