Patchwork Fix PR50343

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Submitter Richard Guenther
Date Sept. 12, 2011, 5:59 a.m.
Message ID <alpine.LNX.2.00.1109120758580.2130@zhemvz.fhfr.qr>
Download mbox | patch
Permalink /patch/114297/
State New
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Comments

Richard Guenther - Sept. 12, 2011, 5:59 a.m.
This fixes PR50343.

Committed as obvious.

Richard.

2011-09-12  Richard Guenther  <rguenther@suse.de>

	PR tree-optimization/50343
	* tree-vect-patterns.c (vect_recog_dot_prod_pattern): Check
	that the reduction is over an SSA name before checking its
	definition.

Patch

Index: gcc/tree-vect-patterns.c
===================================================================
--- gcc/tree-vect-patterns.c	(revision 178725)
+++ gcc/tree-vect-patterns.c	(working copy)
@@ -256,6 +256,8 @@  vect_recog_dot_prod_pattern (VEC (gimple
      we know that oprnd1 is the reduction variable (defined by a loop-header
      phi), and oprnd0 is an ssa-name defined by a stmt in the loop body.
      Left to check that oprnd0 is defined by a (widen_)mult_expr  */
+  if (TREE_CODE (oprnd0) != SSA_NAME)
+    return NULL;
 
   prod_type = half_type;
   stmt = SSA_NAME_DEF_STMT (oprnd0);