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Use new overflow-safe integer comparison functions.

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Commit 6b80394781 introduced integer comparison functions designed
to be as efficient as possible while avoiding overflow.  This
commit makes use of these functions in many of the in-tree qsort()
comparators to help ensure transitivity.  Many of these comparator
functions should also see a small performance boost.

Author: Mats Kindahl
Reviewed-by: Andres Freund, Fabrízio de Royes Mello
Discussion: https://postgr.es/m/CA%2B14426g2Wa9QuUpmakwPxXFWG_1FaY0AsApkvcTBy-YfS6uaw%40mail.gmail.com
This commit is contained in:
Nathan Bossart
2024-02-16 14:05:36 -06:00
parent 6b80394781
commit 3b42bdb471
34 changed files with 80 additions and 159 deletions
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3
src/backend/utils/cache/relcache.c vendored
View File

@@ -69,6 +69,7 @@
#include "commands/policy.h"
#include "commands/publicationcmds.h"
#include "commands/trigger.h"
#include "common/int.h"
#include "miscadmin.h"
#include "nodes/makefuncs.h"
#include "nodes/nodeFuncs.h"
@@ -4520,7 +4521,7 @@ AttrDefaultCmp(const void *a, const void *b)
const AttrDefault *ada = (const AttrDefault *) a;
const AttrDefault *adb = (const AttrDefault *) b;
return ada->adnum - adb->adnum;
return pg_cmp_s16(ada->adnum, adb->adnum);
}
/*

5
src/backend/utils/cache/syscache.c vendored
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@@ -29,6 +29,7 @@
#include "catalog/pg_shdepend_d.h"
#include "catalog/pg_shdescription_d.h"
#include "catalog/pg_shseclabel_d.h"
#include "common/int.h"
#include "lib/qunique.h"
#include "utils/catcache.h"
#include "utils/lsyscache.h"
@@ -676,7 +677,5 @@ oid_compare(const void *a, const void *b)
Oid oa = *((const Oid *) a);
Oid ob = *((const Oid *) b);
if (oa == ob)
return 0;
return (oa > ob) ? 1 : -1;
return pg_cmp_u32(oa, ob);
}

8
src/backend/utils/cache/typcache.c vendored
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@@ -57,6 +57,7 @@
#include "catalog/pg_range.h"
#include "catalog/pg_type.h"
#include "commands/defrem.h"
#include "common/int.h"
#include "executor/executor.h"
#include "lib/dshash.h"
#include "optimizer/optimizer.h"
@@ -2722,12 +2723,7 @@ enum_oid_cmp(const void *left, const void *right)
const EnumItem *l = (const EnumItem *) left;
const EnumItem *r = (const EnumItem *) right;
if (l->enum_oid < r->enum_oid)
return -1;
else if (l->enum_oid > r->enum_oid)
return 1;
else
return 0;
return pg_cmp_u32(l->enum_oid, r->enum_oid);
}
/*