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Subject: [Bug tree-optimization/97765] [11 Regression] ICE at -Os: in
 clear_slot, at hash-table.h:891 since r11-4796-g600be7f09ea1ea4b
Date: Mon, 09 Nov 2020 13:07:15 +0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D97765

--- Comment #3 from CVS Commits <cvs-commit at gcc dot gnu.org> ---
The master branch has been updated by Richard Biener <rguenth@gcc.gnu.org>:

https://gcc.gnu.org/g:17c25a454e056f4677649a5ed4a8b8587d29177c

commit r11-4831-g17c25a454e056f4677649a5ed4a8b8587d29177c
Author: Richard Biener <rguenther@suse.de>
Date:   Mon Nov 9 11:09:01 2020 +0100

    Use a per-edge PRE PHI translation cache

    This changes the phi translation cache to be per edge which
    pushes it off the profiling radar.  For larger testcases the
    combined hashtable causes a load of cache misses and making it
    per edge allows to shrink the entry further.

    2020-11-09  Richard Biener  <rguenther@suse.de>

            PR tree-optimization/97765
            * tree-ssa-pre.c (bb_bitmap_sets::phi_translate_table): Add.
            (PHI_TRANS_TABLE): New macro.
            (phi_translate_table): Remove.
            (expr_pred_trans_d::pred): Remove.
            (expr_pred_trans_d::hash): Simplify.
            (expr_pred_trans_d::equal): Likewise.
            (phi_trans_add): Adjust.
            (phi_translate): Likewise.  Remove hash-table expansion
            detection and optimization.
            (phi_translate_set): Allocate PHI_TRANS_TABLE here.
            (init_pre): Adjsust.
            (fini_pre): Free PHI_TRANS_TABLE.=