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[PATCH 1/2] Enable auto-vectorization for PowerPC 750CL paired-single instructions


The following patch enables auto-vectorization for PowerPC 750CL
paired-single instructions.  It contains two parts: the current which adds
the support in the rs6000 backend and a second part for the vectorizer
testsuite which will be send as a follow-up patch.

This is a joint work with Victor.  Also thanks to everybody; mostly in
the cc list; who helped.

I propose this patch for mainline but I understand if it will be deferred
for stage 1.

Bootstrapped and tested together with the follow on patch (2/2) on ppc,
750cl and x86.

OK for mainline?


:ADDPATCH (rs6000):


        * config/rs6000/ (sminv2sf3, smaxv2sf3, reduc_smax_v2sf,
        reduc_smin_v2sf vec_interleave_highv2sf, vec_interleave_lowv2sf,
        vec_extract_evenv2sf, vec_extract_oddv2sf, reduc_splus_v2sf,
        movmisalignv2sf, vcondv2sf): New.
        UNSPEC_EXTODD_V2SF): Define new constants.
        * config/rs6000/rs6000-protos.h (paired_expand_vector_move,
        paired_emit_vector_cond_expr): New.
        * config/rs6000/rs6000-c.c (__PAIRED__): Add new builtin_define.
        * config/rs6000/rs6000.c (paired_expand_vector_move,
        paired_emit_vector_cond_expr, paired_emit_vector_compare):
        New functions.
        * config/rs6000/750cl.h (ASM_CPU_SPEC): Pass down -m750cl option.

(See attached file: patch_config_27_750cl.txt)

Attachment: patch_config_27_750cl.txt
Description: Text document

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