[Bug rtl-optimization/78378] [5/6/7 Regression] wrong code when combining shift + mult + zero_extend

[jakub at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=78378

--- Comment #7 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Author: jakub
Date: Wed Nov 16 23:22:16 2016
New Revision: 242526

URL: https://gcc.gnu.org/viewcvs?rev=242526&root=gcc&view=rev
Log:
        PR rtl-optimization/78378
        * combine.c (make_extraction): Use force_to_mode for non-{REG,MEM}
        inner only if pos is 0.  Fix up formatting.

        * gcc.c-torture/execute/pr78378.c: New test.

Added:
    trunk/gcc/testsuite/gcc.c-torture/execute/pr78378.c
Modified:
    trunk/gcc/ChangeLog
    trunk/gcc/combine.c
    trunk/gcc/testsuite/ChangeLog