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Subject: [Bug middle-end/87256] hppa spends huge amount of time in synth_mult()
Date: Wed, 26 Aug 2020 06:24:16 +0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D87256

--- Comment #16 from CVS Commits <cvs-commit at gcc dot gnu.org> ---
The releases/gcc-10 branch has been updated by Roger Sayle <sayle@gcc.gnu.o=
rg>:

https://gcc.gnu.org/g:ed1e7a6a8ad6903ee952e82ac9ddac01efb286dd

commit r10-8674-ged1e7a6a8ad6903ee952e82ac9ddac01efb286dd
Author: Roger Sayle <roger@nextmovesoftware.com>
Date:   Wed Aug 26 07:21:08 2020 +0100

    hppa: PR middle-end/87256: Improved hppa_rtx_costs avoids synth_mult
madness.

    Backport from master:

    2020-08-26  Roger Sayle  <roger@nextmovesoftware.com>

    gcc/ChangeLog
            PR middle-end/87256
            * config/pa/pa.c (hppa_rtx_costs_shadd_p): New helper function
            to check for coefficients supported by shNadd and shladd,l.
            (hppa_rtx_costs):  Rewrite to avoid using estimates based upon
            FACTOR and enable recursing deeper into RTL expressions.
            * config/pa/pa.md (shd_internal): Fix define_expand to provide
            gen_shd_internal.=