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authorWilco Dijkstra <wdijkstr@arm.com>2017-02-15 15:23:52 +0000
committerWilco Dijkstra <wdijkstr@arm.com>2017-02-15 15:23:52 +0000
commitf7db120f67d853e0cfa272fa39c8b9be67c0a935 (patch)
tree90dee57467c79f59aeb095bbc16a9589dfe05656 /string
parent3172b27b2b3b0033e85ddf3566c7533a8f3b4bda (diff)
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Remove the str(n)cmp inlines from string/bits/string2.h. The strncmp
optimization seems unlikely to ever be useful, but if it occurs in
real code it should be added to GCC.  Expanding strcmp of small strings
does appear useful (benchmarking shows it is 2-3x faster), so this would
be useful to implement in GCC (PR 78809).

	* string/bits/string2.h (strcmp): Remove define.
	(__strcmp_cg): Likewise.
	(strncmp): Likewise.
Diffstat (limited to 'string')
-rw-r--r--string/bits/string2.h58
1 files changed, 0 insertions, 58 deletions
diff --git a/string/bits/string2.h b/string/bits/string2.h
index 8b138a2a3c..2d4eb41589 100644
--- a/string/bits/string2.h
+++ b/string/bits/string2.h
@@ -92,64 +92,6 @@
 #endif
 
 
-/* Compare characters of S1 and S2.  */
-#ifndef _HAVE_STRING_ARCH_strcmp
-# define strcmp(s1, s2) \
-  __extension__								      \
-  ({ size_t __s1_len, __s2_len;						      \
-     (__builtin_constant_p (s1) && __builtin_constant_p (s2)		      \
-      && (__s1_len = strlen (s1), __s2_len = strlen (s2),		      \
-	  (!__string2_1bptr_p (s1) || __s1_len >= 4)			      \
-	  && (!__string2_1bptr_p (s2) || __s2_len >= 4))		      \
-      ? __builtin_strcmp (s1, s2)					      \
-      : (__builtin_constant_p (s1) && __string2_1bptr_p (s1)		      \
-	 && (__s1_len = strlen (s1), __s1_len < 4)			      \
-	 ? (__builtin_constant_p (s2) && __string2_1bptr_p (s2)		      \
-	    ? __builtin_strcmp (s1, s2)					      \
-	    : __strcmp_cg (s1, s2, __s1_len))				      \
-	 : (__builtin_constant_p (s2) && __string2_1bptr_p (s2)		      \
-	    && (__s2_len = strlen (s2), __s2_len < 4)			      \
-	    ? (__builtin_constant_p (s1) && __string2_1bptr_p (s1)	      \
-	       ? __builtin_strcmp (s1, s2)				      \
-	       : -__strcmp_cg (s2, s1, __s2_len))			      \
-            : __builtin_strcmp (s1, s2)))); })
-
-# define __strcmp_cg(s1, s2, l1) \
-  (__extension__ ({ const unsigned char *__s2 =				      \
-		      (const unsigned char *) (const char *) (s2);	      \
-		    int __result =					      \
-		      (((const unsigned char *) (const char *) (s1))[0]	      \
-		       - __s2[0]);					      \
-		    if (l1 > 0 && __result == 0)			      \
-		      {							      \
-			__result = (((const unsigned char *)		      \
-				     (const char *) (s1))[1] - __s2[1]);      \
-			if (l1 > 1 && __result == 0)			      \
-			  {						      \
-			    __result = (((const unsigned char *)	      \
-					 (const char *) (s1))[2] - __s2[2]);  \
-			    if (l1 > 2 && __result == 0)		      \
-			      __result = (((const unsigned char *)	      \
-					  (const char *)  (s1))[3]	      \
-					  - __s2[3]);			      \
-			  }						      \
-		      }							      \
-		    __result; }))
-#endif
-
-
-/* Compare N characters of S1 and S2.  */
-#ifndef _HAVE_STRING_ARCH_strncmp
-# define strncmp(s1, s2, n)						      \
-  (__extension__ (__builtin_constant_p (n)				      \
-		  && ((__builtin_constant_p (s1)			      \
-		       && strlen (s1) < ((size_t) (n)))			      \
-		      || (__builtin_constant_p (s2)			      \
-			  && strlen (s2) < ((size_t) (n))))		      \
-		  ? strcmp (s1, s2) : strncmp (s1, s2, n)))
-#endif
-
-
 /* Return the length of the initial segment of S which
    consists entirely of characters not in REJECT.  */
 #ifndef _HAVE_STRING_ARCH_strcspn