[PATCH] Fix PR66767

Richard Biener rguenther@suse.de
Mon Jul 6 13:10:00 GMT 2015


Similar to the vect_gen_niters_for_prolog_loop change I already noticed
on x86_64.

Built on ppc64-unknown-linux-gnu, applied.

Richard.

2015-07-06  Richard Biener  <rguenther@suse.de>

	PR tree-optimization/66767
	* tree-vect-loop-manip.c (vect_create_cond_for_align_checks):
	Make sure to build the alignment test on a SSA name without
	final alignment info valid only if the alignment test
	evaluates to true.

Index: gcc/tree-vect-loop-manip.c
===================================================================
--- gcc/tree-vect-loop-manip.c	(revision 225449)
+++ gcc/tree-vect-loop-manip.c	(working copy)
@@ -2143,7 +2143,7 @@ vect_create_cond_for_align_checks (loop_
       bool negative = tree_int_cst_compare
 	(DR_STEP (STMT_VINFO_DATA_REF (stmt_vinfo)), size_zero_node) < 0;
       tree offset = negative
-	? size_int (-TYPE_VECTOR_SUBPARTS (vectype) + 1) : NULL_TREE;
+	? size_int (-TYPE_VECTOR_SUBPARTS (vectype) + 1) : size_zero_node;
 
       /* create: addr_tmp = (int)(address_of_first_vector) */
       addr_base =



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