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author | Denys Vlasenko <vda.linux@googlemail.com> | 2018-12-16 23:02:22 +0100 |
---|---|---|
committer | Denys Vlasenko <vda.linux@googlemail.com> | 2018-12-16 23:02:22 +0100 |
commit | de24e9d3669e43a5419c7990ad13368ae51ced96 (patch) | |
tree | 0d94b4feb8d90ff0b7627511714d2e8adf3ea885 /miscutils | |
parent | 06ade77002eaa28bb3f19480f68ad270b22bd48e (diff) | |
download | busybox-w32-de24e9d3669e43a5419c7990ad13368ae51ced96.tar.gz busybox-w32-de24e9d3669e43a5419c7990ad13368ae51ced96.tar.bz2 busybox-w32-de24e9d3669e43a5419c7990ad13368ae51ced96.zip |
bc: remove redundant JUMP generation when parsing 'while'
function old new delta
zbc_parse_stmt_possibly_auto 2065 2025 -40
------------------------------------------------------------------------------
(add/remove: 0/0 grow/shrink: 0/1 up/down: 0/-40) Total: -40 bytes
text data bss dec hex filename
982035 485 7296 989816 f1a78 busybox_old
981995 485 7296 989776 f1a50 busybox_unstripped
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
Diffstat (limited to 'miscutils')
-rw-r--r-- | miscutils/bc.c | 16 |
1 files changed, 5 insertions, 11 deletions
diff --git a/miscutils/bc.c b/miscutils/bc.c index 925950d78..af57b3d6c 100644 --- a/miscutils/bc.c +++ b/miscutils/bc.c | |||
@@ -4175,7 +4175,7 @@ static BC_STATUS zbc_parse_while(BcParse *p) | |||
4175 | BcStatus s; | 4175 | BcStatus s; |
4176 | BcInstPtr ip; | 4176 | BcInstPtr ip; |
4177 | size_t *label; | 4177 | size_t *label; |
4178 | size_t n; | 4178 | size_t cond_idx; |
4179 | 4179 | ||
4180 | s = zbc_lex_next(&p->l); | 4180 | s = zbc_lex_next(&p->l); |
4181 | if (s) RETURN_STATUS(s); | 4181 | if (s) RETURN_STATUS(s); |
@@ -4183,10 +4183,10 @@ static BC_STATUS zbc_parse_while(BcParse *p) | |||
4183 | s = zbc_lex_next(&p->l); | 4183 | s = zbc_lex_next(&p->l); |
4184 | if (s) RETURN_STATUS(s); | 4184 | if (s) RETURN_STATUS(s); |
4185 | 4185 | ||
4186 | ip.idx = p->func->labels.len; | 4186 | cond_idx = p->func->labels.len; |
4187 | 4187 | ||
4188 | bc_vec_push(&p->func->labels, &p->func->code.len); | 4188 | bc_vec_push(&p->func->labels, &p->func->code.len); |
4189 | bc_vec_push(&p->conds, &ip.idx); | 4189 | bc_vec_push(&p->conds, &cond_idx); |
4190 | 4190 | ||
4191 | ip.idx = p->func->labels.len; | 4191 | ip.idx = p->func->labels.len; |
4192 | ip.func = 1; | 4192 | ip.func = 1; |
@@ -4209,15 +4209,9 @@ static BC_STATUS zbc_parse_while(BcParse *p) | |||
4209 | s = zbc_parse_stmt_fail_if_bare_NLINE(p, false, "while"); | 4209 | s = zbc_parse_stmt_fail_if_bare_NLINE(p, false, "while"); |
4210 | if (s) RETURN_STATUS(s); | 4210 | if (s) RETURN_STATUS(s); |
4211 | 4211 | ||
4212 | n = *((size_t *) bc_vec_top(&p->conds)); | 4212 | dbg_lex("%s:%d BC_INST_JUMP to %d", __func__, __LINE__, cond_idx); |
4213 | bc_parse_push(p, BC_INST_JUMP); | ||
4214 | bc_parse_pushIndex(p, n); | ||
4215 | |||
4216 | label = bc_vec_top(&p->conds); | ||
4217 | |||
4218 | dbg_lex("%s:%d BC_INST_JUMP to %d", __func__, __LINE__, *label); | ||
4219 | bc_parse_push(p, BC_INST_JUMP); | 4213 | bc_parse_push(p, BC_INST_JUMP); |
4220 | bc_parse_pushIndex(p, *label); | 4214 | bc_parse_pushIndex(p, cond_idx); |
4221 | 4215 | ||
4222 | label = bc_vec_item(&p->func->labels, ip.idx); | 4216 | label = bc_vec_item(&p->func->labels, ip.idx); |
4223 | dbg_lex("%s:%d rewriting label: %d -> %d", __func__, __LINE__, *label, p->func->code.len); | 4217 | dbg_lex("%s:%d rewriting label: %d -> %d", __func__, __LINE__, *label, p->func->code.len); |