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Subject: [Bug target/103316] PowerPC: Gimple folding of int128 comparisons
 produces suboptimal code
Date: Thu, 16 Jun 2022 08:59:57 +0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D103316

--- Comment #17 from CVS Commits <cvs-commit at gcc dot gnu.org> ---
The master branch has been updated by HaoChen Gui <guihaoc@gcc.gnu.org>:

https://gcc.gnu.org/g:8d1c6e7038b0c281ac2678f2f615806a7aac9174

commit r13-1131-g8d1c6e7038b0c281ac2678f2f615806a7aac9174
Author: Haochen Gui <guihaoc@gcc.gnu.org>
Date:   Mon May 30 09:12:34 2022 +0800

    rs6000: add V1TI into vector comparison expand [PR103316]

    This patch adds V1TI mode into a new mode iterator used in vector
comparison,shift and rotation expands.  It also merges some vector comparis=
on,
shift and rotation expands for V1T1 and other vector integer modes as they =
have
the similar patterns.  The expands for V1TI only are removed.

    gcc/
            PR target/103316
            * config/rs6000/rs6000-builtin.cc (rs6000_gimple_fold_builtin):
Enable
            gimple folding for RS6000_BIF_VCMPEQUT, RS6000_BIF_VCMPNET,
            RS6000_BIF_CMPGE_1TI, RS6000_BIF_CMPGE_U1TI, RS6000_BIF_VCMPGTU=
T,
            RS6000_BIF_VCMPGTST, RS6000_BIF_CMPLE_1TI, RS6000_BIF_CMPLE_U1T=
I.
            * config/rs6000/vector.md (VEC_IC): New mode iterator.  Add sup=
port
            for new Power10 V1TI instructions.
            (vec_cmp<mode><mode>): Set mode iterator to VEC_IC.
            (vec_cmpu<mode><mode>): Likewise.
            (vector_nlt<mode>): Set mode iterator to VEC_IC.
            (vector_nltv1ti): Remove.
            (vector_gtu<mode>): Set mode iterator to VEC_IC.
            (vector_gtuv1ti): Remove.
            (vector_nltu<mode>): Set mode iterator to VEC_IC.
            (vector_nltuv1ti): Remove.
            (vector_geu<mode>): Set mode iterator to VEC_IC.
            (vector_ngt<mode>): Likewise.
            (vector_ngtv1ti): Remove.
            (vector_ngtu<mode>): Set mode iterator to VEC_IC.
            (vector_ngtuv1ti): Remove.
            (vector_gtu_<mode>_p): Set mode iterator to VEC_IC.
            (vector_gtu_v1ti_p): Remove.
            (vrotl<mode>3): Set mode iterator to VEC_IC.  Emit insns for V1=
TI.
            (vrotlv1ti3): Remove.
            (vashr<mode>3): Set mode iterator to VEC_IC.  Emit insns for V1=
TI.
            (vashrv1ti3): Remove.

    gcc/testsuite/
            PR target/103316
            * gcc.target/powerpc/pr103316.c: New.
            * gcc.target/powerpc/fold-vec-cmp-int128.c: New.=