[Bug rtl-optimization/69014] [4.9/5/6 Regression] gcc.c-torture/execute/991023-1.c FAILs with -Os -fmodulo-sched -fno-tree-vrp

[rth at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=69014

--- Comment #13 from Richard Henderson <rth at gcc dot gnu.org> ---
Author: rth
Date: Thu Jan 14 23:12:53 2016
New Revision: 232395

URL: https://gcc.gnu.org/viewcvs?rev=232395&root=gcc&view=rev
Log:
PR rtl-opt/69014

  * loop-doloop.c (record_reg_sets): New.
  (doloop_optimize): Reject the transform if the sequence
  clobbers registers live at the end of the loop block.
  (doloop_optimize_loops): Enable df_live if needed.

Modified:
    trunk/gcc/ChangeLog
    trunk/gcc/loop-doloop.c