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patch 8.2.2403: Vim9: profiling if/elseif/endif not correct

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Problem:    Vim9: profiling if/elseif/endif not correct.
Solution:   Add profile instructions.  Fix that "elseif" was wrong.
This commit is contained in:
Bram Moolenaar
2021-01-24 17:53:47 +01:00
parent 8323cab31c
commit ced68a0070
5 changed files with 115 additions and 35 deletions
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87
src/vim9compile.c
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@@ -44,6 +44,7 @@ struct endlabel_S {
*/
typedef struct {
int is_seen_else;
int is_seen_skip_not; // a block was unconditionally executed
int is_had_return; // every block ends in :return
int is_if_label; // instruction idx at IF or ELSEIF
endlabel_T *is_end_label; // instructions to set end label
@@ -2098,13 +2099,7 @@ generate_undo_cmdmods(cctx_T *cctx)
may_generate_prof_end(cctx_T *cctx, int prof_lnum)
{
if (cctx->ctx_profiling && prof_lnum >= 0)
{
int save_lnum = cctx->ctx_lnum;
cctx->ctx_lnum = prof_lnum;
generate_instr(cctx, ISN_PROF_END);
cctx->ctx_lnum = save_lnum;
}
}
#endif
@@ -6735,6 +6730,18 @@ compile_if(char_u *arg, cctx_T *cctx)
else
scope->se_u.se_if.is_if_label = -1;
#ifdef FEAT_PROFILE
if (cctx->ctx_profiling && cctx->ctx_skip == SKIP_YES
&& skip_save != SKIP_YES)
{
// generated a profile start, need to generate a profile end, since it
// won't be done after returning
cctx->ctx_skip = SKIP_NOT;
generate_instr(cctx, ISN_PROF_END);
cctx->ctx_skip = SKIP_YES;
}
#endif
return p;
}
@@ -6758,6 +6765,25 @@ compile_elseif(char_u *arg, cctx_T *cctx)
if (!cctx->ctx_had_return)
scope->se_u.se_if.is_had_return = FALSE;
if (cctx->ctx_skip == SKIP_NOT)
{
// previous block was executed, this one and following will not
cctx->ctx_skip = SKIP_YES;
scope->se_u.se_if.is_seen_skip_not = TRUE;
}
if (scope->se_u.se_if.is_seen_skip_not)
{
// A previous block was executed, skip over expression and bail out.
// Do not count the "elseif" for profiling.
#ifdef FEAT_PROFILE
if (cctx->ctx_profiling && ((isn_T *)instr->ga_data)[instr->ga_len - 1]
.isn_type == ISN_PROF_START)
--instr->ga_len;
#endif
skip_expr_cctx(&p, cctx);
return p;
}
if (cctx->ctx_skip == SKIP_UNKNOWN)
{
if (compile_jump_to_end(&scope->se_u.se_if.is_end_label,
@@ -6771,7 +6797,17 @@ compile_elseif(char_u *arg, cctx_T *cctx)
// compile "expr"; if we know it evaluates to FALSE skip the block
CLEAR_FIELD(ppconst);
if (cctx->ctx_skip == SKIP_YES)
{
cctx->ctx_skip = SKIP_UNKNOWN;
#ifdef FEAT_PROFILE
if (cctx->ctx_profiling)
{
// the previous block was skipped, need to profile this line
generate_instr(cctx, ISN_PROF_START);
instr_count = instr->ga_len;
}
#endif
}
if (compile_expr1(&p, cctx, &ppconst) == FAIL)
{
clear_ppconst(&ppconst);
@@ -6829,7 +6865,27 @@ compile_else(char_u *arg, cctx_T *cctx)
scope->se_u.se_if.is_had_return = FALSE;
scope->se_u.se_if.is_seen_else = TRUE;
if (scope->se_skip_save != SKIP_YES)
#ifdef FEAT_PROFILE
if (cctx->ctx_profiling)
{
if (cctx->ctx_skip == SKIP_NOT
&& ((isn_T *)instr->ga_data)[instr->ga_len - 1]
.isn_type == ISN_PROF_START)
// the previous block was executed, do not count "else" for profiling
--instr->ga_len;
if (cctx->ctx_skip == SKIP_YES && !scope->se_u.se_if.is_seen_skip_not)
{
// the previous block was not executed, this one will, do count the
// "else" for profiling
cctx->ctx_skip = SKIP_NOT;
generate_instr(cctx, ISN_PROF_END);
generate_instr(cctx, ISN_PROF_START);
cctx->ctx_skip = SKIP_YES;
}
}
#endif
if (!scope->se_u.se_if.is_seen_skip_not && scope->se_skip_save != SKIP_YES)
{
// jump from previous block to the end, unless the else block is empty
if (cctx->ctx_skip == SKIP_UNKNOWN)
@@ -6884,6 +6940,17 @@ compile_endif(char_u *arg, cctx_T *cctx)
}
// Fill in the "end" label in jumps at the end of the blocks.
compile_fill_jump_to_end(&ifscope->is_end_label, cctx);
#ifdef FEAT_PROFILE
// even when skipping we count the endif as executed, unless the block it's
// in is skipped
if (cctx->ctx_profiling && cctx->ctx_skip == SKIP_YES
&& scope->se_skip_save != SKIP_YES)
{
cctx->ctx_skip = SKIP_NOT;
generate_instr(cctx, ISN_PROF_START);
}
#endif
cctx->ctx_skip = scope->se_skip_save;
// If all the blocks end in :return and there is an :else then the
@@ -8005,7 +8072,8 @@ compile_def_function(
{
// beyond the last line
#ifdef FEAT_PROFILE
may_generate_prof_end(&cctx, prof_lnum);
if (cctx.ctx_skip != SKIP_YES)
may_generate_prof_end(&cctx, prof_lnum);
#endif
break;
}
@@ -8023,7 +8091,8 @@ compile_def_function(
}
#ifdef FEAT_PROFILE
if (cctx.ctx_profiling && cctx.ctx_lnum != prof_lnum)
if (cctx.ctx_profiling && cctx.ctx_lnum != prof_lnum &&
cctx.ctx_skip != SKIP_YES)
{
may_generate_prof_end(&cctx, prof_lnum);