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Subject: [Bug target/101796] Miss optimization to optimized (vashl op0, (op1:
 const_duplicate_vector)) to (ashl op0 op1_inner)
Date: Wed, 15 Dec 2021 08:27:10 +0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D101796

--- Comment #5 from CVS Commits <cvs-commit at gcc dot gnu.org> ---
The master branch has been updated by hongtao Liu <liuhongt@gcc.gnu.org>:

https://gcc.gnu.org/g:8f9fea41a767f6ad8cf3d521031048a2491f98b1

commit r12-5990-g8f9fea41a767f6ad8cf3d521031048a2491f98b1
Author: Haochen Jiang <haochen.jiang@intel.com>
Date:   Wed Dec 1 16:48:28 2021 +0800

    Add combine splitter to transform vashr/vlshr/vashl_optab to
ashr/lshr/ashl_optab for const vector duplicate operand.

    gcc/ChangeLog:

            PR target/101796
            * config/i386/predicates.md (const_vector_operand):
            Add new predicate.
            * config/i386/sse.md(<insn><mode>3<mask_name>):
            Add new define_split below.

    gcc/testsuite/ChangeLog:

            PR target/101796
            * gcc.target/i386/pr101796-1.c: New test.=