[Bug middle-end/62103] Incorrect folding of bitfield in a union on big endian targets

[thopre01 at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=62103

--- Comment #12 from Thomas Preud'homme <thopre01 at gcc dot gnu.org> ---
Author: thopre01
Date: Wed Feb  4 08:22:45 2015
New Revision: 220390

URL: https://gcc.gnu.org/viewcvs?rev=220390&root=gcc&view=rev
Log:
2015-02-04  Thomas Preud'homme  <thomas.preudho...@arm.com>

    gcc/
    PR middle-end/62103
    * tree-ssa-sccvn.c (fully_constant_vn_reference_p): Use TYPE_PRECISION
    to compute size of referenced value in the constant case.

    gcc/testsuite/
    PR middle-end/62103
    * gcc.c-torture/execute/bitfld-7.c: New test adapted from bitfld-6.c
    to use 24 bits for bitfield b.

Added:
    trunk/gcc/testsuite/gcc.c-torture/execute/bitfld-7.c
Modified:
    trunk/gcc/ChangeLog
    trunk/gcc/testsuite/ChangeLog
    trunk/gcc/tree-ssa-sccvn.c