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From: "hjl at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug target/64108] ICE: SIGSEGV in decide_alg() with -mmemset-strategy=libcall:-1:align -minline-all-stringops
Date: Tue, 02 Dec 2014 14:11:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=64108

--- Comment #2 from hjl at gcc dot gnu.org <hjl at gcc dot gnu.org> ---
Author: hjl
Date: Tue Dec  2 14:10:23 2014
New Revision: 218272

URL: https://gcc.gnu.org/viewcvs?rev=218272&root=gcc&view=rev
Log:
Stop only if there aren't any usable algorithms

When searching for an usable algorithm with -minline-all-stringops,
decide_alg stops when it sees libcall even if there is a usable
algorithm.  It goes into an infinite loop.  This patch changes
decide_alg to stop searching only if there aren't any usable algorithms.
Testd on Linux/x86-64.


gcc/

    PR target/64108
    * config/i386/i386.c (decide_alg): Stop only if there aren't
    any usable algorithms.

gcc/testsuite/

    PR target/64108
    * gcc.target/i386/memset-strategy-2.c: New test.

Added:
    trunk/gcc/testsuite/gcc.target/i386/memset-strategy-2.c
Modified:
    trunk/gcc/ChangeLog
    trunk/gcc/config/i386/i386.c
    trunk/gcc/testsuite/ChangeLog