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From: "cvs-commit at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug rtl-optimization/103541] unnecessary spills around const
 functions calls
Date: Tue, 07 Feb 2023 14:05:06 +0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D103541

--- Comment #5 from CVS Commits <cvs-commit at gcc dot gnu.org> ---
The master branch has been updated by Vladimir Makarov <vmakarov@gcc.gnu.or=
g>:

https://gcc.gnu.org/g:f661c0bb6371f355966a67b5ce71398e80792948

commit r13-5730-gf661c0bb6371f355966a67b5ce71398e80792948
Author: Vladimir N. Makarov <vmakarov@redhat.com>
Date:   Tue Feb 7 08:27:36 2023 -0500

    RA: Implement reuse of equivalent memory for caller saves optimization

    The test case shows opportunity to reuse memory with constant address f=
or
    caller saves optimization for constant or pure function call.  The patch
    implements the memory reuse.

            PR rtl-optimization/103541

    gcc/ChangeLog:

            * ira.h (struct ira_reg_equiv_s): Add new field caller_save_p.
            * ira.cc (validate_equiv_mem): Check memref address variance.
            (update_equiv_regs): Define caller save equivalence for
            valid_combine.
            (setup_reg_equiv): Clear defined_p flag for caller save
equivalence.
            * lra-constraints.cc (lra_copy_reg_equiv): Add new arg
            call_save_p.  Use caller save equivalence depending on the arg.
            (split_reg): Adjust the call.

    gcc/testsuite/ChangeLog:

            * gcc.target/i386/pr103541.c: New.=