Introduce ssa_defined_default_def_p function (PR tree-optimization/79529).
commit44841cf784b191f491faeb0a22a6cd565237f3f5
authormarxin <marxin@138bc75d-0d04-0410-961f-82ee72b054a4>
Fri, 17 Feb 2017 14:36:08 +0000 (17 14:36 +0000)
committermarxin <marxin@138bc75d-0d04-0410-961f-82ee72b054a4>
Fri, 17 Feb 2017 14:36:08 +0000 (17 14:36 +0000)
tree2d644d831748550bdfe21bd8444f49d2c62f5768
parentd67a31ec023bfd4a7a8c12c075d12e61dbf18ccc
Introduce ssa_defined_default_def_p function (PR tree-optimization/79529).

2017-02-17  Martin Liska  <mliska@suse.cz>

PR tree-optimization/79529
* tree-ssa-loop-unswitch.c (is_maybe_undefined): Use
ssa_defined_default_def_p to handle cases which are implicitly
defined.
* tree-ssa.c (ssa_defined_default_def_p): New function.
(ssa_undefined_value_p): Use ssa_defined_default_def_p to handle cases
which are implicitly defined.
* tree-ssa.h (ssa_defined_default_def_p): Declare.

git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@245530 138bc75d-0d04-0410-961f-82ee72b054a4
gcc/ChangeLog
gcc/tree-ssa-loop-unswitch.c
gcc/tree-ssa.c
gcc/tree-ssa.h