String benchtest cleanup

Continue cleanup of the string benchtests.  Remove simplistic
byte-oriented versions with faster generic implementations.
Remove bcopy/bzero benchmarks (bcopy/bzero are obsolete and never
emitted by compilers).  Remove builtin versions of memcpy, memset
and strlen.  Remove all remaining "stupid" implementations given
they are always slower than the "simple" variants and thus don't
add anything useful.

	* benchtests/bench-strcasecmp.c (stupid_strcasecmp): Remove.
	* benchtests/bench-strcasestr.c (stupid_strcasestr): Remove.
	* benchtests/bench-strchr.c (stupid_strchr): Remove.
	* benchtests/bench-strcmp.c (stupid_strcmp): Remove.
	* benchtests/bench-strcspn.c (stupid_strcspn): Remove.
	* benchtests/bench-strlen.c (builtin_strlen): Remove.
	* benchtests/bench-strncasecmp.c (stupid_strncasecmp): Remove.
	* benchtests/bench-strncmp.c (stupid_strncmp): Remove.
	* benchtests/bench-strpbrk.c (stupid_strpbrk): Remove.
	* benchtests/bench-strspn.c (stupid_strspn): Remove.
	* benchtests/Makefile: Remove bench-bcopy.c and bench-bzero.c.
	* benchtests/bench-bcopy.c: Delete file.
	* benchtests/bench-bzero.c: Likewise.
	* benchtests/bench-memccpy.c (stupid_memccpy): Remove.
	(simple_memccpy): Remove.
	(generic_memccpy): Add function.
	* benchtests/bench-memcpy.c: (builtin_memcpy): Remove.
	* benchtests/bench-memmove.c (simple_bcopy): Remove.
	* benchtests/bench-mempcpy.c (simple_mempcpy): Remove.
	(generic_mempcpy): Add new function.
	* benchtests/bench-memset.c (simple_bzero): Remove.
	(builtin_bzero): Remove.
	(builtin_memset): Remove.
	* benchtests/bench-rawmemchr.c (simple_rawmemchr): Remove.
	(generic_rawmemchr): Add new function.

20 files changed, 56 insertions, 384 deletions

diff --git a/ChangeLog b/ChangeLog
index 77b4587196..56f30076dc 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,31 @@
+2019-02-12  Wilco Dijkstra  <wdijkstr@arm.com>
+
+	* benchtests/bench-strcasecmp.c (stupid_strcasecmp): Remove.
+	* benchtests/bench-strcasestr.c (stupid_strcasestr): Remove.
+	* benchtests/bench-strchr.c (stupid_strchr): Remove.
+	* benchtests/bench-strcmp.c (stupid_strcmp): Remove.
+	* benchtests/bench-strcspn.c (stupid_strcspn): Remove.
+	* benchtests/bench-strlen.c (builtin_strlen): Remove.
+	* benchtests/bench-strncasecmp.c (stupid_strncasecmp): Remove.
+	* benchtests/bench-strncmp.c (stupid_strncmp): Remove.
+	* benchtests/bench-strpbrk.c (stupid_strpbrk): Remove.
+	* benchtests/bench-strspn.c (stupid_strspn): Remove.
+	* benchtests/Makefile: Remove bench-bcopy.c and bench-bzero.c.
+	* benchtests/bench-bcopy.c: Delete file.
+	* benchtests/bench-bzero.c: Likewise.
+	* benchtests/bench-memccpy.c (stupid_memccpy): Remove.
+	(simple_memccpy): Remove.
+	(generic_memccpy): Add function.
+	* benchtests/bench-memcpy.c: (builtin_memcpy): Remove.
+	* benchtests/bench-memmove.c (simple_bcopy): Remove.
+	* benchtests/bench-mempcpy.c (simple_mempcpy): Remove.
+	(generic_mempcpy): Add new function.
+	* benchtests/bench-memset.c (simple_bzero): Remove.
+	(builtin_bzero): Remove.
+	(builtin_memset): Remove.
+	* benchtests/bench-rawmemchr.c (simple_rawmemchr): Remove.
+	(generic_rawmemchr): Add new function.
+
 2019-02-12  Florian Weimer  <fweimer@redhat.com>
 
 	* nss/getent.c (ahosts_keys_int): Include IPv6 scope ID in output.
diff --git a/benchtests/Makefile b/benchtests/Makefile
index e1907753b4..3339f2c770 100644
--- a/benchtests/Makefile
+++ b/benchtests/Makefile
@@ -37,7 +37,7 @@ bench := $(foreach B,$(filter bench-%,${BENCHSET}), ${${B}})
 endif
 
 # String function benchmarks.
-string-benchset := bcopy bzero memccpy memchr memcmp memcpy memmem memmove \
+string-benchset := memccpy memchr memcmp memcpy memmem memmove \
 		   mempcpy memset rawmemchr stpcpy stpncpy strcasecmp strcasestr \
 		   strcat strchr strchrnul strcmp strcpy strcspn strlen \
 		   strncasecmp strncat strncmp strncpy strnlen strpbrk strrchr \
diff --git a/benchtests/bench-bcopy.c b/benchtests/bench-bcopy.c
deleted file mode 100644
index f8f33cb7f5..0000000000
--- a/benchtests/bench-bcopy.c
+++ /dev/null
@@ -1,20 +0,0 @@
-/* Measure bcopy functions.
-   Copyright (C) 2013-2019 Free Software Foundation, Inc.
-   This file is part of the GNU C Library.
-
-   The GNU C Library is free software; you can redistribute it and/or
-   modify it under the terms of the GNU Lesser General Public
-   License as published by the Free Software Foundation; either
-   version 2.1 of the License, or (at your option) any later version.
-
-   The GNU C Library is distributed in the hope that it will be useful,
-   but WITHOUT ANY WARRANTY; without even the implied warranty of
-   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
-   Lesser General Public License for more details.
-
-   You should have received a copy of the GNU Lesser General Public
-   License along with the GNU C Library; if not, see
-   <http://www.gnu.org/licenses/>.  */
-
-#define TEST_BCOPY
-#include "bench-memmove.c"
diff --git a/benchtests/bench-bzero.c b/benchtests/bench-bzero.c
deleted file mode 100644
index 36f884a7fd..0000000000
--- a/benchtests/bench-bzero.c
+++ /dev/null
@@ -1,19 +0,0 @@
-/* Measure bzero functions.
-   Copyright (C) 2013-2019 Free Software Foundation, Inc.
-   This file is part of the GNU C Library.
-
-   The GNU C Library is free software; you can redistribute it and/or
-   modify it under the terms of the GNU Lesser General Public
-   License as published by the Free Software Foundation; either
-   version 2.1 of the License, or (at your option) any later version.
-
-   The GNU C Library is distributed in the hope that it will be useful,
-   but WITHOUT ANY WARRANTY; without even the implied warranty of
-   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
-   Lesser General Public License for more details.
-
-   You should have received a copy of the GNU Lesser General Public
-   License along with the GNU C Library; if not, see
-   <http://www.gnu.org/licenses/>.  */
-#define TEST_BZERO
-#include "bench-memset.c"
diff --git a/benchtests/bench-memccpy.c b/benchtests/bench-memccpy.c
index 6dca16be24..d3a2df5e72 100644
--- a/benchtests/bench-memccpy.c
+++ b/benchtests/bench-memccpy.c
@@ -20,28 +20,8 @@
 #define TEST_NAME "memccpy"
 #include "bench-string.h"
 
-void *simple_memccpy (void *, const void *, int, size_t);
-void *stupid_memccpy (void *, const void *, int, size_t);
-
-IMPL (stupid_memccpy, 0)
-IMPL (simple_memccpy, 0)
-IMPL (memccpy, 1)
-
-void *
-simple_memccpy (void *dst, const void *src, int c, size_t n)
-{
-  const char *s = src;
-  char *d = dst;
-
-  while (n-- > 0)
-    if ((*d++ = *s++) == (char) c)
-      return d;
-
-  return NULL;
-}
-
 void *
-stupid_memccpy (void *dst, const void *src, int c, size_t n)
+generic_memccpy (void *dst, const void *src, int c, size_t n)
 {
   void *p = memchr (src, c, n);
 
@@ -52,6 +32,9 @@ stupid_memccpy (void *dst, const void *src, int c, size_t n)
   return NULL;
 }
 
+IMPL (memccpy, 1)
+IMPL (generic_memccpy, 0)
+
 typedef void *(*proto_t) (void *, const void *, int c, size_t);
 
 static void
diff --git a/benchtests/bench-memcpy.c b/benchtests/bench-memcpy.c
index b32ca4c443..6c5c549144 100644
--- a/benchtests/bench-memcpy.c
+++ b/benchtests/bench-memcpy.c
@@ -23,13 +23,6 @@
 # define TEST_NAME "memcpy"
 # include "bench-string.h"
 
-char *simple_memcpy (char *, const char *, size_t);
-char *builtin_memcpy (char *, const char *, size_t);
-
-IMPL (simple_memcpy, 0)
-IMPL (builtin_memcpy, 0)
-IMPL (memcpy, 1)
-
 char *
 simple_memcpy (char *dst, const char *src, size_t n)
 {
@@ -39,11 +32,9 @@ simple_memcpy (char *dst, const char *src, size_t n)
   return ret;
 }
 
-char *
-builtin_memcpy (char *dst, const char *src, size_t n)
-{
-  return __builtin_memcpy (dst, src, n);
-}
+IMPL (memcpy, 1)
+IMPL (simple_memcpy, 0)
+
 #endif
 
 # include "json-lib.h"
diff --git a/benchtests/bench-memmove.c b/benchtests/bench-memmove.c
index ad1f0bb767..a5d957791a 100644
--- a/benchtests/bench-memmove.c
+++ b/benchtests/bench-memmove.c
@@ -17,34 +17,16 @@
    <http://www.gnu.org/licenses/>.  */
 
 #define TEST_MAIN
-#ifdef TEST_BCOPY
-# define TEST_NAME "bcopy"
-#else
-# define TEST_NAME "memmove"
-#endif
+#define TEST_NAME "memmove"
 #include "bench-string.h"
 #include "json-lib.h"
 
 char *simple_memmove (char *, const char *, size_t);
 
-#ifdef TEST_BCOPY
-typedef void (*proto_t) (const char *, char *, size_t);
-void simple_bcopy (const char *, char *, size_t);
-
-IMPL (simple_bcopy, 0)
-IMPL (bcopy, 1)
-
-void
-simple_bcopy (const char *src, char *dst, size_t n)
-{
-  simple_memmove (dst, src, n);
-}
-#else
 typedef char *(*proto_t) (char *, const char *, size_t);
 
-IMPL (simple_memmove, 0)
 IMPL (memmove, 1)
-#endif
+IMPL (simple_memmove, 0)
 
 char *
 inhibit_loop_to_libcall
@@ -74,11 +56,7 @@ do_one_test (json_ctx_t *json_ctx, impl_t *impl, char *dst, char *src, const
   TIMING_NOW (start);
   for (i = 0; i < iters; ++i)
     {
-#ifdef TEST_BCOPY
-      CALL (impl, src, dst, len);
-#else
       CALL (impl, dst, src, len);
-#endif
     }
   TIMING_NOW (stop);
 
diff --git a/benchtests/bench-mempcpy.c b/benchtests/bench-mempcpy.c
index 82b276b823..09f8557413 100644
--- a/benchtests/bench-mempcpy.c
+++ b/benchtests/bench-mempcpy.c
@@ -21,17 +21,13 @@
 #define TEST_NAME "mempcpy"
 #include "bench-string.h"
 
-char *simple_mempcpy (char *, const char *, size_t);
-
-IMPL (simple_mempcpy, 0)
-IMPL (mempcpy, 1)
-
 char *
-simple_mempcpy (char *dst, const char *src, size_t n)
+generic_mempcpy (char *dst, const char *src, size_t n)
 {
-  while (n--)
-    *dst++ = *src++;
-  return dst;
+  return memcpy (dst, src, n) + n;
 }
 
+IMPL (mempcpy, 1)
+IMPL (generic_mempcpy, 0)
+
 #include "bench-memcpy.c"
diff --git a/benchtests/bench-memset.c b/benchtests/bench-memset.c
index c2679a6ac1..0df55d1263 100644
--- a/benchtests/bench-memset.c
+++ b/benchtests/bench-memset.c
@@ -17,66 +17,22 @@
    <http://www.gnu.org/licenses/>.  */
 
 #define TEST_MAIN
-#ifdef TEST_BZERO
-# define TEST_NAME "bzero"
-#else
-# ifndef WIDE
-#  define TEST_NAME "memset"
-# else
-#  define TEST_NAME "wmemset"
-# endif /* WIDE */
-#endif /* !TEST_BZERO */
-#define MIN_PAGE_SIZE 131072
-#include "bench-string.h"
-
 #ifndef WIDE
-# define SIMPLE_MEMSET simple_memset
+# define TEST_NAME "memset"
 #else
-# define SIMPLE_MEMSET simple_wmemset
+# define TEST_NAME "wmemset"
 #endif /* WIDE */
+#define MIN_PAGE_SIZE 131072
+#include "bench-string.h"
 
 #include "json-lib.h"
 
 CHAR *SIMPLE_MEMSET (CHAR *, int, size_t);
 
-#ifdef TEST_BZERO
-typedef void (*proto_t) (char *, size_t);
-void simple_bzero (char *, size_t);
-void builtin_bzero (char *, size_t);
-
-IMPL (simple_bzero, 0)
-IMPL (builtin_bzero, 0)
-IMPL (bzero, 1)
-
-void
-simple_bzero (char *s, size_t n)
-{
-  SIMPLE_MEMSET (s, 0, n);
-}
-
-void
-builtin_bzero (char *s, size_t n)
-{
-  __builtin_bzero (s, n);
-}
-#else
 typedef CHAR *(*proto_t) (CHAR *, int, size_t);
 
-IMPL (SIMPLE_MEMSET, 0)
-# ifndef WIDE
-char *builtin_memset (char *, int, size_t);
-IMPL (builtin_memset, 0)
-# endif /* !WIDE */
 IMPL (MEMSET, 1)
-
-# ifndef WIDE
-char *
-builtin_memset (char *s, int c, size_t n)
-{
-  return __builtin_memset (s, c, n);
-}
-# endif /* !WIDE */
-#endif /* !TEST_BZERO */
+IMPL (SIMPLE_MEMSET, 0)
 
 CHAR *
 inhibit_loop_to_libcall
@@ -98,11 +54,7 @@ do_one_test (json_ctx_t *json_ctx, impl_t *impl, CHAR *s,
   TIMING_NOW (start);
   for (i = 0; i < iters; ++i)
     {
-#ifdef TEST_BZERO
-      CALL (impl, s, n);
-#else
       CALL (impl, s, c, n);
-#endif /* !TEST_BZERO */
     }
   TIMING_NOW (stop);
 
@@ -159,9 +111,7 @@ test_main (void)
 
   json_array_begin (&json_ctx, "results");
 
-#ifndef TEST_BZERO
   for (c = -65; c <= 130; c += 65)
-#endif
     {
       for (i = 0; i < 18; ++i)
 	do_test (&json_ctx, 0, c, 1 << i);
diff --git a/benchtests/bench-rawmemchr.c b/benchtests/bench-rawmemchr.c
index 2b11cfe483..44f3114fd2 100644
--- a/benchtests/bench-rawmemchr.c
+++ b/benchtests/bench-rawmemchr.c
@@ -17,26 +17,25 @@
    <http://www.gnu.org/licenses/>.  */
 
 #include <assert.h>
+#include <stdint.h>
 
 #define TEST_MAIN
 #define TEST_NAME "rawmemchr"
 #include "bench-string.h"
 
 typedef char *(*proto_t) (const char *, int);
-char *simple_rawmemchr (const char *, int);
-
-IMPL (simple_rawmemchr, 0)
-IMPL (rawmemchr, 1)
 
 char *
-simple_rawmemchr (const char *s, int c)
+generic_rawmemchr (const char *s, int c)
 {
-  while (1)
-    if (*s++ == (char) c)
-      return (char *) s - 1;
-  return NULL;
+  if (c != 0)
+    return memchr (s, c, PTRDIFF_MAX);
+  return (char *)s + strlen (s);
 }
 
+IMPL (rawmemchr, 1)
+IMPL (generic_rawmemchr, 0)
+
 static void
 do_one_test (impl_t *impl, const char *s, int c, char *exp_res)
 {
diff --git a/benchtests/bench-strcasecmp.c b/benchtests/bench-strcasecmp.c
index 5c471a8678..4e9bcdc9a5 100644
--- a/benchtests/bench-strcasecmp.c
+++ b/benchtests/bench-strcasecmp.c
@@ -23,9 +23,7 @@
 
 typedef int (*proto_t) (const char *, const char *);
 static int simple_strcasecmp (const char *, const char *);
-static int stupid_strcasecmp (const char *, const char *);
 
-IMPL (stupid_strcasecmp, 0)
 IMPL (simple_strcasecmp, 0)
 IMPL (strcasecmp, 1)
 
@@ -41,24 +39,6 @@ simple_strcasecmp (const char *s1, const char *s2)
   return ret;
 }
 
-static int
-stupid_strcasecmp (const char *s1, const char *s2)
-{
-  size_t ns1 = strlen (s1) + 1, ns2 = strlen (s2) + 1;
-  size_t n = ns1 < ns2 ? ns1 : ns2;
-  int ret = 0;
-
-  while (n--)
-    {
-      if ((ret = ((unsigned char) tolower (*s1)
-		  - (unsigned char) tolower (*s2))) != 0)
-	break;
-      ++s1;
-      ++s2;
-    }
-  return ret;
-}
-
 static void
 do_one_test (impl_t *impl, const char *s1, const char *s2, int exp_result)
 {
diff --git a/benchtests/bench-strcasestr.c b/benchtests/bench-strcasestr.c
index 030e5c7601..1458070d47 100644
--- a/benchtests/bench-strcasestr.c
+++ b/benchtests/bench-strcasestr.c
@@ -27,33 +27,8 @@
 #define __strnlen strnlen
 #include "../string/strcasestr.c"
 
-
-static char *
-stupid_strcasestr (const char *s1, const char *s2)
-{
-  ssize_t s1len = strlen (s1);
-  ssize_t s2len = strlen (s2);
-
-  if (s2len > s1len)
-    return NULL;
-
-  for (ssize_t i = 0; i <= s1len - s2len; ++i)
-    {
-      size_t j;
-      for (j = 0; j < s2len; ++j)
-	if (tolower (s1[i + j]) != tolower (s2[j]))
-	  break;
-      if (j == s2len)
-	return (char *) s1 + i;
-    }
-
-  return NULL;
-}
-
-
 typedef char *(*proto_t) (const char *, const char *);
 
-IMPL (stupid_strcasestr, 0)
 IMPL (simple_strcasestr, 0)
 IMPL (strcasestr, 1)
 
diff --git a/benchtests/bench-strchr.c b/benchtests/bench-strchr.c
index 0648c99f37..b8dba17cae 100644
--- a/benchtests/bench-strchr.c
+++ b/benchtests/bench-strchr.c
@@ -38,7 +38,6 @@
 # ifdef USE_FOR_STRCHRNUL
 #  undef STRCHR
 #  define STRCHR strchrnul
-#  define stupid_STRCHR stupid_STRCHRNUL
 #  define simple_STRCHR simple_STRCHRNUL
 # endif /* !USE_FOR_STRCHRNUL */
 # define MIDDLE_CHAR 127
@@ -47,7 +46,6 @@
 # ifdef USE_FOR_STRCHRNUL
 #  undef STRCHR
 #  define STRCHR wcschrnul
-#  define stupid_STRCHR stupid_WCSCHRNUL
 #  define simple_STRCHR simple_WCSCHRNUL
 # endif /* !USE_FOR_STRCHRNUL */
 # define MIDDLE_CHAR 1121
@@ -72,18 +70,6 @@ simple_STRCHR (const CHAR *s, int c)
   return (CHAR *) s;
 }
 
-CHAR *
-stupid_STRCHR (const CHAR *s, int c)
-{
-  size_t n = STRLEN (s) + 1;
-
-  while (n--)
-    if (*s++ == (CHAR) c)
-      return (CHAR *) s - 1;
-  return NULLRET ((CHAR *) s - 1);
-}
-
-IMPL (stupid_STRCHR, 0)
 IMPL (simple_STRCHR, 0)
 IMPL (STRCHR, 1)
 
diff --git a/benchtests/bench-strcmp.c b/benchtests/bench-strcmp.c
index 695aa19f92..c87b3ac02b 100644
--- a/benchtests/bench-strcmp.c
+++ b/benchtests/bench-strcmp.c
@@ -27,7 +27,6 @@
 #ifdef WIDE
 # define L(str) L##str
 # define SIMPLE_STRCMP simple_wcscmp
-# define STUPID_STRCMP stupid_wcscmp
 # define CHARBYTESLOG 2
 # define MIDCHAR 0x7fffffff
 # define LARGECHAR 0xfffffffe
@@ -51,31 +50,11 @@ simple_wcscmp (const wchar_t *s1, const wchar_t *s2)
   return c1 < c2 ? -1 : 1;
 }
 
-int
-stupid_wcscmp (const wchar_t *s1, const wchar_t *s2)
-{
-  size_t ns1 = wcslen (s1) + 1;
-  size_t ns2 = wcslen (s2) + 1;
-  size_t n = ns1 < ns2 ? ns1 : ns2;
-  int ret = 0;
-
-  wchar_t c1, c2;
-
-  while (n--) {
-    c1 = *s1++;
-    c2 = *s2++;
-    if ((ret = c1 < c2 ? -1 : c1 == c2 ? 0 : 1) != 0)
-      break;
-  }
-  return ret;
-}
-
 #else
 # include <limits.h>
 
 # define L(str) str
 # define SIMPLE_STRCMP simple_strcmp
-# define STUPID_STRCMP stupid_strcmp
 # define CHARBYTESLOG 0
 # define MIDCHAR 0x7f
 # define LARGECHAR 0xfe
@@ -90,26 +69,12 @@ simple_strcmp (const char *s1, const char *s2)
   return ret;
 }
 
-int
-stupid_strcmp (const char *s1, const char *s2)
-{
-  size_t ns1 = strlen (s1) + 1;
-  size_t ns2 = strlen (s2) + 1;
-  size_t n = ns1 < ns2 ? ns1 : ns2;
-  int ret = 0;
-
-  while (n--)
-    if ((ret = *(unsigned char *) s1++ - *(unsigned char *) s2++) != 0)
-      break;
-  return ret;
-}
 #endif
 
 # include "json-lib.h"
 
 typedef int (*proto_t) (const CHAR *, const CHAR *);
 
-IMPL (STUPID_STRCMP, 1)
 IMPL (SIMPLE_STRCMP, 1)
 IMPL (STRCMP, 1)
 
diff --git a/benchtests/bench-strcspn.c b/benchtests/bench-strcspn.c
index c5d723d983..bf9c4f8db3 100644
--- a/benchtests/bench-strcspn.c
+++ b/benchtests/bench-strcspn.c
@@ -28,17 +28,13 @@
 
 #ifndef WIDE
 # define SIMPLE_STRCSPN simple_strcspn
-# define STUPID_STRCSPN stupid_strcspn
 #else
 # define SIMPLE_STRCSPN simple_wcscspn
-# define STUPID_STRCSPN stupid_wcscspn
 #endif /* WIDE */
 
 typedef size_t (*proto_t) (const CHAR *, const CHAR *);
 size_t SIMPLE_STRCSPN (const CHAR *, const CHAR *);
-size_t STUPID_STRCSPN (const CHAR *, const CHAR *);
 
-IMPL (STUPID_STRCSPN, 0)
 IMPL (SIMPLE_STRCSPN, 0)
 IMPL (STRCSPN, 1)
 
@@ -55,17 +51,4 @@ SIMPLE_STRCSPN (const CHAR *s, const CHAR *rej)
   return s - str - 1;
 }
 
-size_t
-STUPID_STRCSPN (const CHAR *s, const CHAR *rej)
-{
-  size_t ns = STRLEN (s), nrej = STRLEN (rej);
-  size_t i, j;
-
-  for (i = 0; i < ns; ++i)
-    for (j = 0; j < nrej; ++j)
-      if (s[i] == rej[j])
-	return i;
-  return i;
-}
-
 #include "bench-strpbrk.c"
diff --git a/benchtests/bench-strlen.c b/benchtests/bench-strlen.c
index b1cd2accb4..f86095a5d3 100644
--- a/benchtests/bench-strlen.c
+++ b/benchtests/bench-strlen.c
@@ -34,15 +34,6 @@ size_t memchr_strlen (const CHAR *);
 IMPL (memchr_strlen, 0)
 IMPL (generic_strlen, 0)
 
-#ifndef WIDE
-size_t
-builtin_strlen (const CHAR *p)
-{
-  return __builtin_strlen (p);
-}
-IMPL (builtin_strlen, 0)
-#endif
-
 size_t
 memchr_strlen (const CHAR *p)
 {
diff --git a/benchtests/bench-strncasecmp.c b/benchtests/bench-strncasecmp.c
index e18302a9c4..7c97877112 100644
--- a/benchtests/bench-strncasecmp.c
+++ b/benchtests/bench-strncasecmp.c
@@ -23,9 +23,7 @@
 
 typedef int (*proto_t) (const char *, const char *, size_t);
 static int simple_strncasecmp (const char *, const char *, size_t);
-static int stupid_strncasecmp (const char *, const char *, size_t);
 
-IMPL (stupid_strncasecmp, 0)
 IMPL (simple_strncasecmp, 0)
 IMPL (strncasecmp, 1)
 
@@ -48,27 +46,6 @@ simple_strncasecmp (const char *s1, const char *s2, size_t n)
   return ret;
 }
 
-static int
-stupid_strncasecmp (const char *s1, const char *s2, size_t max)
-{
-  size_t ns1 = strlen (s1) + 1;
-  size_t ns2 = strlen (s2) + 1;
-  size_t n = ns1 < ns2 ? ns1 : ns2;
-  if (n > max)
-    n = max;
-  int ret = 0;
-
-  while (n--)
-    {
-      if ((ret = ((unsigned char) tolower (*s1)
-		  - (unsigned char) tolower (*s2))) != 0)
-	break;
-      ++s1;
-      ++s2;
-    }
-  return ret;
-}
-
 static void
 do_one_test (impl_t *impl, const char *s1, const char *s2, size_t n,
 	     int exp_result)
diff --git a/benchtests/bench-strncmp.c b/benchtests/bench-strncmp.c
index 750150c245..a4f3412a8f 100644
--- a/benchtests/bench-strncmp.c
+++ b/benchtests/bench-strncmp.c
@@ -28,7 +28,6 @@
 #ifdef WIDE
 # define L(str) L##str
 # define SIMPLE_STRNCMP simple_wcsncmp
-# define STUPID_STRNCMP stupid_wcsncmp
 
 /* Wcsncmp uses signed semantics for comparison, not unsigned.
    Avoid using substraction since possible overflow.  */
@@ -47,29 +46,9 @@ simple_wcsncmp (const CHAR *s1, const CHAR *s2, size_t n)
   return 0;
 }
 
-int
-stupid_wcsncmp (const CHAR *s1, const CHAR *s2, size_t n)
-{
-  wchar_t c1, c2;
-  size_t ns1 = wcsnlen (s1, n) + 1, ns2 = wcsnlen (s2, n) + 1;
-
-  n = ns1 < n ? ns1 : n;
-  n = ns2 < n ? ns2 : n;
-
-  while (n--)
-    {
-      c1 = *s1++;
-      c2 = *s2++;
-      if (c1 != c2)
-	return c1 > c2 ? 1 : -1;
-    }
-  return 0;
-}
-
 #else
 # define L(str) str
 # define SIMPLE_STRNCMP simple_strncmp
-# define STUPID_STRNCMP stupid_strncmp
 
 /* Strncmp uses unsigned semantics for comparison.  */
 int
@@ -82,23 +61,10 @@ simple_strncmp (const char *s1, const char *s2, size_t n)
   return ret;
 }
 
-int
-stupid_strncmp (const char *s1, const char *s2, size_t n)
-{
-  size_t ns1 = strnlen (s1, n) + 1, ns2 = strnlen (s2, n) + 1;
-  int ret = 0;
-
-  n = ns1 < n ? ns1 : n;
-  n = ns2 < n ? ns2 : n;
-  while (n-- && (ret = *(unsigned char *) s1++ - *(unsigned char *) s2++) == 0);
-  return ret;
-}
-
 #endif /* !WIDE */
 
 typedef int (*proto_t) (const CHAR *, const CHAR *, size_t);
 
-IMPL (STUPID_STRNCMP, 0)
 IMPL (SIMPLE_STRNCMP, 0)
 IMPL (STRNCMP, 1)
 
diff --git a/benchtests/bench-strpbrk.c b/benchtests/bench-strpbrk.c
index 61639cfd5b..14e1bcb873 100644
--- a/benchtests/bench-strpbrk.c
+++ b/benchtests/bench-strpbrk.c
@@ -37,17 +37,13 @@
 
 # ifndef WIDE
 #  define SIMPLE_STRPBRK simple_strpbrk
-#  define STUPID_STRPBRK stupid_strpbrk
 # else
 #  define SIMPLE_STRPBRK simple_wcspbrk
-#  define STUPID_STRPBRK stupid_wcspbrk
 # endif /* WIDE */
 
 typedef CHAR *(*proto_t) (const CHAR *, const CHAR *);
 CHAR *SIMPLE_STRPBRK (const CHAR *, const CHAR *);
-CHAR *STUPID_STRPBRK (const CHAR *, const CHAR *);
 
-IMPL (STUPID_STRPBRK, 0)
 IMPL (SIMPLE_STRPBRK, 0)
 IMPL (STRPBRK, 1)
 
@@ -64,18 +60,6 @@ SIMPLE_STRPBRK (const CHAR *s, const CHAR *rej)
   return NULL;
 }
 
-CHAR *
-STUPID_STRPBRK (const CHAR *s, const CHAR *rej)
-{
-  size_t ns = STRLEN (s), nrej = STRLEN (rej);
-  size_t i, j;
-
-  for (i = 0; i < ns; ++i)
-    for (j = 0; j < nrej; ++j)
-      if (s[i] == rej[j])
-	return (CHAR *) s + i;
-  return NULL;
-}
 #endif /* !STRPBRK_RESULT */
 
 static void
diff --git a/benchtests/bench-strspn.c b/benchtests/bench-strspn.c
index 04507cdd61..ac874fe234 100644
--- a/benchtests/bench-strspn.c
+++ b/benchtests/bench-strspn.c
@@ -28,19 +28,15 @@
 
 #ifndef WIDE
 # define SIMPLE_STRSPN simple_strspn
-# define STUPID_STRSPN stupid_strspn
 # define SMALL_CHAR 127
 #else
 # define SIMPLE_STRSPN simple_wcsspn
-# define STUPID_STRSPN stupid_wcsspn
 # define SMALL_CHAR 1273
 #endif /* WIDE */
 
 typedef size_t (*proto_t) (const CHAR *, const CHAR *);
 size_t SIMPLE_STRSPN (const CHAR *, const CHAR *);
-size_t STUPID_STRSPN (const CHAR *, const CHAR *);
 
-IMPL (STUPID_STRSPN, 0)
 IMPL (SIMPLE_STRSPN, 0)
 IMPL (STRSPN, 1)
 
@@ -61,23 +57,6 @@ SIMPLE_STRSPN (const CHAR *s, const CHAR *acc)
   return s - str - 1;
 }
 
-size_t
-STUPID_STRSPN (const CHAR *s, const CHAR *acc)
-{
-  size_t ns = STRLEN (s), nacc = STRLEN (acc);
-  size_t i, j;
-
-  for (i = 0; i < ns; ++i)
-    {
-      for (j = 0; j < nacc; ++j)
-	if (s[i] == acc[j])
-	  break;
-      if (j == nacc)
-	return i;
-    }
-  return i;
-}
-
 static void
 do_one_test (impl_t *impl, const CHAR *s, const CHAR *acc, size_t exp_res)
 {