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authorWilco Dijkstra <wdijkstr@arm.com>2017-02-10 17:26:16 +0000
committerWilco Dijkstra <wdijkstr@arm.com>2017-02-10 17:28:11 +0000
commit40b7fbf27310d4f4a899aa2c54740dce5369ec70 (patch)
treedf78f63943d48a7e7af1718d1db7b8229044a2f1 /sysdeps/x86_64/Versions
parent3403a17fea8ccef7dc5f99553a13231acf838744 (diff)
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GLIBC uses strchr (s, '\0') as an idiom to find the end of a string.
This is transformed into rawmemchr by the bits/string2.h header.
However this is generally slower than strlen on most targets, even when
an optimized rawmemchr implementation exists.  Since GCC7 optimizes
strchr (s, '\0') to strlen (s) + s, the GLIBC headers should not
transform this to rawmemchr.  As GCC recognizes strchr as a builtin,
defining strchr as the builtin is not useful.

	* string/bits/string2.h (strchr): Remove define.
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