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Subject: [Bug tree-optimization/14799] [tree-ssa] convert a sequence of "if"s
 to a "switch" statement
Date: Tue, 01 Dec 2020 10:47:32 +0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D14799

--- Comment #7 from CVS Commits <cvs-commit at gcc dot gnu.org> ---
The master branch has been updated by Martin Liska <marxin@gcc.gnu.org>:

https://gcc.gnu.org/g:03eb09292ef228d1d12b5168cdd748583b1f992a

commit r11-5605-g03eb09292ef228d1d12b5168cdd748583b1f992a
Author: Martin Liska <mliska@suse.cz>
Date:   Fri Aug 28 10:26:13 2020 +0200

    Add if-chain to switch conversion pass.

    gcc/ChangeLog:

            PR tree-optimization/14799
            PR ipa/88702
            * Makefile.in: Add gimple-if-to-switch.o.
            * dbgcnt.def (DEBUG_COUNTER): Add new debug counter.
            * passes.def: Include new pass_if_to_switch pass.
            * timevar.def (TV_TREE_IF_TO_SWITCH): New timevar.
            * tree-pass.h (make_pass_if_to_switch): New.
            * tree-ssa-reassoc.c (struct operand_entry): Move to the header.
            (dump_range_entry): Move to header file.
            (debug_range_entry): Likewise.
            (no_side_effect_bb): Make it global.
            * tree-switch-conversion.h (simple_cluster::simple_cluster):
            Add inline for couple of functions in order to prevent error
            about multiple defined symbols.
            * gimple-if-to-switch.cc: New file.
            * tree-ssa-reassoc.h: New file.

    gcc/testsuite/ChangeLog:

            PR tree-optimization/14799
            PR ipa/88702
            * gcc.dg/tree-ssa/pr96480.c: Disable if-to-switch conversion.
            * gcc.dg/tree-ssa/reassoc-32.c: Likewise.
            * g++.dg/tree-ssa/if-to-switch-1.C: New test.
            * gcc.dg/tree-ssa/if-to-switch-1.c: New test.
            * gcc.dg/tree-ssa/if-to-switch-2.c: New test.
            * gcc.dg/tree-ssa/if-to-switch-3.c: New test.
            * gcc.dg/tree-ssa/if-to-switch-4.c: New test.
            * gcc.dg/tree-ssa/if-to-switch-5.c: New test.
            * gcc.dg/tree-ssa/if-to-switch-6.c: New test.
            * gcc.dg/tree-ssa/if-to-switch-7.c: New test.
            * gcc.dg/tree-ssa/if-to-switch-8.c: New test.=