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

[jakub at gcc dot gnu.org]

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

--- Comment #4 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Author: jakub
Date: Wed Nov 19 08:18:53 2014
New Revision: 217753

URL: https://gcc.gnu.org/viewcvs?rev=217753&root=gcc&view=rev
Log:
    PR rtl-optimization/63843
    * simplify-rtx.c (simplify_binary_operation_1) <case ASHIFTRT>: For
    optimization of ashiftrt of subreg of lshiftrt, check that code
    is ASHIFTRT.

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

Added:
    trunk/gcc/testsuite/gcc.c-torture/execute/pr63843.c
Modified:
    trunk/gcc/ChangeLog
    trunk/gcc/simplify-rtx.c
    trunk/gcc/testsuite/ChangeLog