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bc: eliminate struct BcInstPtr::results_len_before_call, it is redundant

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function                                             old     new   delta
zbc_program_call                                     332     318     -14
zxc_program_exec                                    4147    4087     -60
------------------------------------------------------------------------------
(add/remove: 0/0 grow/shrink: 0/2 up/down: 0/-74)             Total: -74 bytes

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
This commit is contained in:
Denys Vlasenko
2019-01-04 00:34:52 +01:00
parent 02c3d7a1c9
commit 377cc97b19
1 changed files with 1 additions and 10 deletions
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11
miscutils/bc.c
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@@ -378,7 +378,6 @@ typedef struct BcResult {
typedef struct BcInstPtr {
size_t func;
size_t inst_idx;
IF_BC(size_t results_len_before_call;)
} BcInstPtr;
typedef enum BcLexType {
@@ -5311,7 +5310,6 @@ static BC_STATUS zxc_program_read(void)
ip.func = BC_PROG_READ;
ip.inst_idx = 0;
IF_BC(ip.results_len_before_call = G.prog.results.len;)
bc_vec_push(&G.prog.exestack, &ip);
exec_err:
@@ -5971,7 +5969,6 @@ static BC_STATUS zbc_program_call(char *code, size_t *idx)
RETURN_STATUS(bc_error_fmt("function has %u parameters, but called with %u", func->nparams, nparams));
}
ip.inst_idx = 0;
ip.results_len_before_call = G.prog.results.len - nparams;
for (i = 0; i < nparams; ++i) {
BcResult *arg;
@@ -6019,11 +6016,6 @@ static BC_STATUS zbc_program_return(char inst)
size_t i;
BcInstPtr *ip = bc_vec_top(&G.prog.exestack);
#if SANITY_CHECKS
if (!STACK_HAS_EQUAL_OR_MORE_THAN(&G.prog.results, ip->results_len_before_call + (inst == XC_INST_RET)))
RETURN_STATUS(bc_error_stack_has_too_few_elements());
#endif
if (inst == XC_INST_RET) {
BcStatus s;
BcNum *num;
@@ -6033,6 +6025,7 @@ static BC_STATUS zbc_program_return(char inst)
if (s) RETURN_STATUS(s);
bc_num_init(&res.d.n, num->len);
bc_num_copy(&res.d.n, num);
bc_vec_pop(&G.prog.results);
//} else if (f->void_func) {
//prepare "void" result in res
} else {
@@ -6040,8 +6033,6 @@ static BC_STATUS zbc_program_return(char inst)
//bc_num_zero(&res.d.n); - already is
}
res.t = XC_RESULT_TEMP;
bc_vec_npop(&G.prog.results, G.prog.results.len - ip->results_len_before_call);
bc_vec_push(&G.prog.results, &res);
bc_vec_pop(&G.prog.exestack);