[Bug rtl-optimization/63843] [5 Regression] wrong code generation at -O1 and higher

[clyon at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=63843

--- Comment #6 from Christophe Lyon <clyon at gcc dot gnu.org> ---
Author: clyon
Date: Thu Jun  4 12:43:03 2015
New Revision: 224125

URL: https://gcc.gnu.org/viewcvs?rev=224125&root=gcc&view=rev
Log:
2015-06-02  Christophe Lyon  <christophe.l...@linaro.org>

        Backport from trunk r217753.
        2014-11-19  Jakub Jelinek  <ja...@redhat.com>

        PR rtl-optimization/63843
        gcc/
        * simplify-rtx.c (simplify_binary_operation_1) <case ASHIFTRT>: For
        optimization of ashiftrt of subreg of lshiftrt, check that code
        is ASHIFTRT.

        gcc/testsuite
        * gcc.c-torture/execute/pr63843.c: New test.


Added:
   
branches/linaro/gcc-4_9-branch/gcc/testsuite/gcc.c-torture/execute/pr63843.c
Modified:
    branches/linaro/gcc-4_9-branch/gcc/ChangeLog.linaro
    branches/linaro/gcc-4_9-branch/gcc/simplify-rtx.c
    branches/linaro/gcc-4_9-branch/gcc/testsuite/ChangeLog.linaro