[Bug rtl-optimization/69535] [6 Regression] wrong code with -O -fno-tree-bit-ccp -fno-tree-reassoc due to use of uninitialised value

[rth at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=69535

--- Comment #9 from Richard Henderson <rth at gcc dot gnu.org> ---
Author: rth
Date: Mon Feb  1 07:32:01 2016
New Revision: 233032

URL: https://gcc.gnu.org/viewcvs?rev=233032&root=gcc&view=rev
Log:
PR rtl-opt/69535

  * combine.c (make_compound_operation): When looking through a
  subreg, make sure to re-extend to the width of the outer mode.

Added:
    trunk/gcc/testsuite/gcc.dg/pr69535.c
Modified:
    trunk/gcc/ChangeLog
    trunk/gcc/combine.c
    trunk/gcc/testsuite/ChangeLog