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tree-vrp.c (vrp_visit_phi_node): Restrict SCEV analysis to loop PHI nodes.

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2010-02-17  Richard Guenther  <rguenther@suse.de>

	* tree-vrp.c (vrp_visit_phi_node): Restrict SCEV analysis
	to loop PHI nodes.

From-SVN: r156825
This commit is contained in:
Richard Guenther 2010-02-17 09:45:31 +00:00 committed by Richard Biener
parent 6832680673
commit a95740b328
2 changed files with 7 additions and 3 deletions
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5
gcc/ChangeLog
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@ -1,3 +1,8 @@
2010-02-17 Richard Guenther <rguenther@suse.de>
* tree-vrp.c (vrp_visit_phi_node): Restrict SCEV analysis
to loop PHI nodes.
2010-02-17 Jakub Jelinek <jakub@redhat.com>
PR debug/42918

5
gcc/tree-vrp.c
View File

@ -6318,11 +6318,10 @@ vrp_visit_phi_node (gimple phi)
}
/* If this is a loop PHI node SCEV may known more about its
value-range.
??? Identify loop PHI nodes properly. */
value-range. */
if (current_loops
&& (l = loop_containing_stmt (phi))
&& loop_outer (l))
&& l->header == gimple_bb (phi))
adjust_range_with_scev (&vr_result, l, phi, lhs);
if (vr_result.type == VR_VARYING)