[Bug tree-optimization/64718] Bad 16-bit bswap replacement

[thopre01 at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=64718

--- Comment #5 from Thomas Preud'homme <thopre01 at gcc dot gnu.org> ---
Author: thopre01
Date: Wed Jan 28 10:20:19 2015
New Revision: 220203

URL: https://gcc.gnu.org/viewcvs?rev=220203&root=gcc&view=rev
Log:
2015-01-28  Thomas Preud'homme  <thomas.preudhomme@arm.com>

    gcc/
    PR tree-optimization/64718
    * tree-ssa-math-opts.c (pass_optimize_bswap::execute): Make bswap_type
    be a 16bit unsigned integer when n->range is 16.
    (bswap_replace): Convert src to that type if necessary for all bswap
    sizes.  Fix rotation right notation in nearby comment.  Use bswap_type
    set in pass_optimize_bswap::execute ().

    gcc/testsuite/
    PR tree-optimization/64718
    * gcc.c-torture/execute/pr64718.c: New test.

Added:
    trunk/gcc/testsuite/gcc.c-torture/execute/pr64718.c
Modified:
    trunk/gcc/ChangeLog
    trunk/gcc/testsuite/ChangeLog
    trunk/gcc/tree-ssa-math-opts.c