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Subject: [Bug rtl-optimization/90706] [10/11/12/13 Regression] Useless code
 generated for stack / register operations on AVR
Date: Thu, 02 Mar 2023 22:22:32 +0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D90706

--- Comment #18 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:2639f9d2313664e6b4ed2f8131fefa60aeeb0518

commit r13-6424-g2639f9d2313664e6b4ed2f8131fefa60aeeb0518
Author: Vladimir N. Makarov <vmakarov@redhat.com>
Date:   Thu Mar 2 16:29:05 2023 -0500

    IRA: Use minimal cost for hard register movement

    This is the 2nd attempt to fix PR90706.  IRA calculates wrong AVR
    costs for moving general hard regs of SFmode.  This was the reason for
    spilling a pseudo in the PR.  In this patch we use smaller move cost
    of hard reg in its natural and operand modes.

            PR rtl-optimization/90706

    gcc/ChangeLog:

            * ira-costs.cc: Include print-rtl.h.
            (record_reg_classes, scan_one_insn): Add code to print debug in=
fo.
            (record_operand_costs): Find and use smaller cost for hard reg
            move.

    gcc/testsuite/ChangeLog:

            * gcc.target/avr/pr90706.c: New.=