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[patch]: Fix regression caused by fix for 61917
- From: Kai Tietz <ktietz70 at googlemail dot com>
- To: GCC Patches <gcc-patches at gcc dot gnu dot org>
- Cc: Jakub Jelinek <jakub at redhat dot com>
- Date: Wed, 25 Feb 2015 19:13:55 +0100
- Subject: [patch]: Fix regression caused by fix for 61917
- Authentication-results: sourceware.org; auth=none
Hi,
The patch didn't handled the case for dt being vect_constant_def,
where of course the reduc_def_stmt is NULL.
By checking for NULL before testing for PHI, we now fallback for such
cases to old behavior and return in the next if-statment.
2015-02-25 Richard Biener <rguenther@suse.de>
Kai Tietz <ktietz@redhat.com>
PR tree-optimization/61917
* tree-vect-loop.c (vectorizable_reduction): Handle obvious case
that reduc_def_stmt is null.
Tested and will apply as obvious to trunk and 4.9 if there are no objections.
Sorry for the noise.
Kai
Index: tree-vect-loop.c
===================================================================
--- tree-vect-loop.c (Revision 220968)
+++ tree-vect-loop.c (Arbeitskopie)
@@ -4912,7 +4912,7 @@ vectorizable_reduction (gimple stmt, gimple_stmt_i
if (!found_nested_cycle_def)
reduc_def_stmt = def_stmt;
- if (gimple_code (reduc_def_stmt) != GIMPLE_PHI)
+ if (reduc_def_stmt && gimple_code (reduc_def_stmt) != GIMPLE_PHI)
return false;
if (!(dt == vect_reduction_def