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libiberty: Don't update and remove did_subs field from demangler structs.

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The d_info field did_subs was used for estimating the string output
size. It was no longer used when the malloc-less callback interface
was introduced in 2007 (svn r121305). But the field was still updated.
When backtracking was introduced in 2013 (svn r205292) did_subs was
also added to the d_info_checkpoint struct. But except for updating
the field it was still not used.

Since it is never used just stop updating the field and remove it
from the two structs.

libiberty/ChangeLog:

	* cp-demangle.h (struct d_info): Remove did_subs field.
	* cp-demangle.c (struct d_info_checkpoint): Likewise.
	(d_template_param): Don't update did_subs.
	(d_substitution): Likewise.
	(d_checkpoint): Don't assign did_subs.
	(d_backtrack): Likewise.
	(cplus_demangle_init_info): Don't initialize did_subs.

From-SVN: r247054
This commit is contained in:
Mark Wielaard 2017-04-21 09:01:44 +00:00 committed by Mark Wielaard
parent ad32f0675e
commit 1240212c6b
3 changed files with 10 additions and 12 deletions
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10
libiberty/ChangeLog
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@ -1,3 +1,13 @@
2017-04-21 Mark Wielaard <mark@klomp.org>
* cp-demangle.h (struct d_info): Remove did_subs field.
* cp-demangle.c (struct d_info_checkpoint): Likewise.
(d_template_param): Don't update did_subs.
(d_substitution): Likewise.
(d_checkpoint): Don't assign did_subs.
(d_backtrack): Likewise.
(cplus_demangle_init_info): Don't initialize did_subs.
2017-03-27 Pedro Alves <palves@redhat.com>
* cp-demint.c (cplus_demangle_fill_component): Handle

8
libiberty/cp-demangle.c
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@ -316,7 +316,6 @@ struct d_info_checkpoint
const char *n;
int next_comp;
int next_sub;
int did_subs;
int expansion;
};
@ -3075,8 +3074,6 @@ d_template_param (struct d_info *di)
if (param < 0)
return NULL;
++di->did_subs;
return d_make_template_param (di, param);
}
@ -3846,8 +3843,6 @@ d_substitution (struct d_info *di, int prefix)
if (id >= (unsigned int) di->next_sub)
return NULL;
++di->did_subs;
return di->subs[id];
}
else
@ -3912,7 +3907,6 @@ d_checkpoint (struct d_info *di, struct d_info_checkpoint *checkpoint)
checkpoint->n = di->n;
checkpoint->next_comp = di->next_comp;
checkpoint->next_sub = di->next_sub;
checkpoint->did_subs = di->did_subs;
checkpoint->expansion = di->expansion;
}
@ -3922,7 +3916,6 @@ d_backtrack (struct d_info *di, struct d_info_checkpoint *checkpoint)
di->n = checkpoint->n;
di->next_comp = checkpoint->next_comp;
di->next_sub = checkpoint->next_sub;
di->did_subs = checkpoint->did_subs;
di->expansion = checkpoint->expansion;
}
@ -6159,7 +6152,6 @@ cplus_demangle_init_info (const char *mangled, int options, size_t len,
chars in the mangled string. */
di->num_subs = len;
di->next_sub = 0;
di->did_subs = 0;
di->last_name = NULL;

4
libiberty/cp-demangle.h
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@ -111,10 +111,6 @@ struct d_info
int next_sub;
/* The number of available entries in the subs array. */
int num_subs;
/* The number of substitutions which we actually made from the subs
array, plus the number of template parameter references we
saw. */
int did_subs;
/* The last name we saw, for constructors and destructors. */
struct demangle_component *last_name;
/* A running total of the length of large expansions from the