[PATCH v2] Fix strrchr regression.

[Ondřej Bílka]

On Tue, Aug 06, 2013 at 10:34:30AM +0200, Ondřej Bílka wrote:
Hi, according to profiling feedback I tuned strrchr implementation to
much faster one.

See results at:
http://kam.mff.cuni.cz/~ondra/benchmark_string/strrchr_profile.html
are updated and benchmark program is here:
http://kam.mff.cuni.cz/~ondra/benchmark_string/strrchr_profile160813.tar.bz2

I do not cover adding avx2 implementation which will be posted
separately. A considerable speedup is possible there.
http://kam.mff.cuni.cz/~ondra/benchmark_string/haswell/strrchr_profile/results_rand/result.html

I need to retest it on atom and silvermont to verify how much I
improved.

Passes tests, OK to commit?

Ondra

	* sysdeps/x86_64/multiarch/Makefile (sysdep_routines): Update.
	* sysdeps/x86_64/multiarch/ifunc-impl-list.c: Remove strrchr ifunc.
	* sysdeps/x86_64/multiarch/strend-sse4.S Remove.
	* sysdeps/x86_64/multiarch/strrchr-sse2-no-bsf.S Likewise.
	* sysdeps/x86_64/multiarch/strrchr.S: Likewise.
	* sysdeps/x86_64/strrchr.S (strrchr): Use optimized implementation.

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