r204557 - in /branches/google/gcc-4_8/gcc: Chan...

[congh@gcc.gnu.org]

Author: congh
Date: Fri Nov  8 02:08:05 2013
New Revision: 204557

URL: http://gcc.gnu.org/viewcvs?rev=204557&root=gcc&view=rev
Log:
2013-11-07  Cong Hou  <congh@google.com>

	Backport from mainline
	2013-11-07  Cong Hou  <congh@google.com>

	PR tree-optimization/56764
	* tree-vect-loop-manip.c (vect_create_cond_for_alias_checks):
	  Combine alias checks if it is possible to amortize the runtime
	  overhead.  Return the number of alias checks after merging.
	  * tree-vect-data-refs.c (vect_prune_runtime_alias_test_list):
	    Use the function vect_create_cond_for_alias_checks () to check
	    the number of alias checks.

2013-11-07  Cong Hou  <congh@google.com>

	Backport from mainline
	2013-11-07  Cong Hou  <congh@google.com>

	* gcc.dg/vect/vect-alias-check.c: New.


Added:
    branches/google/gcc-4_8/gcc/testsuite/gcc.dg/vect/vect-alias-check.c
Modified:
    branches/google/gcc-4_8/gcc/ChangeLog
    branches/google/gcc-4_8/gcc/testsuite/ChangeLog
    branches/google/gcc-4_8/gcc/tree-vect-data-refs.c
    branches/google/gcc-4_8/gcc/tree-vect-loop-manip.c
    branches/google/gcc-4_8/gcc/tree-vectorizer.h