[Bug rtl-optimization/68217] Wrong constant folding

[kugan at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=68217

--- Comment #4 from kugan at gcc dot gnu.org ---
Author: kugan
Date: Fri Jul 29 00:35:23 2016
New Revision: 238846

URL: https://gcc.gnu.org/viewcvs?rev=238846&root=gcc&view=rev
Log:
gcc/ChangeLog:

2016-07-29  Kugan Vivekanandarajah  <kuganv@linaro.org>

        PR middle-end/68217
        * tree-vrp.c (extract_range_from_binary_expr_1): In case of signed
        & sign-bit-CST, generate [-INF, 0] instead of [-INF, INF].


gcc/testsuite/ChangeLog:

2016-07-29  Kugan Vivekanandarajah  <kuganv@linaro.org>

        PR middle-end/68217
        * gcc.dg/pr68217.c: New test.

Added:
    trunk/gcc/testsuite/gcc.dg/pr68217.c
Modified:
    trunk/gcc/ChangeLog
    trunk/gcc/testsuite/ChangeLog
    trunk/gcc/tree-vrp.c