re PR tree-optimization/91010 (ICE: Segmentation fault (in location_wrapper_p))

	PR tree-optimization/91010
	* tree-vect-stmts.c (scan_operand_equal_p): If offset1 == offset2,
	return true.  Otherwise, don't call operand_equal_p if offset1 or
	offset2 is NULL and just return false.

	* g++.dg/vect/simd-10.cc: New test.

From-SVN: r272763

gcc/ChangeLog

+2019-06-27  Jakub Jelinek  <jakub@redhat.com>
+
+	PR tree-optimization/91010
+	* tree-vect-stmts.c (scan_operand_equal_p): If offset1 == offset2,
+	return true.  Otherwise, don't call operand_equal_p if offset1 or
+	offset2 is NULL and just return false.
+
 2019-06-27  Iain Sandoe  <iain@sandoe.co.uk>
 
 	* config/rs6000/rs6000.c (darwin_rs6000_override_options): Honour

gcc/testsuite/ChangeLog

+2019-06-27  Jakub Jelinek  <jakub@redhat.com>
+
+	PR tree-optimization/91010
+	* g++.dg/vect/simd-10.cc: New test.
+
 2019-06-27  Steven G. Kargl  <kargl@gcc.gnu.org>
 
 	PR fortran/90987

gcc/testsuite/g++.dg/vect/simd-10.cc

+// PR tree-optimization/91010
+// { dg-do compile }
+// { dg-require-effective-target size32plus }
+// { dg-additional-options "-fopenmp-simd -fno-tree-forwprop" }
+// { dg-additional-options "-mavx" { target avx_runtime } }
+// { dg-final { scan-tree-dump-times "vectorized \[1-3] loops" 2 "vect" { target i?86-*-* x86_64-*-* } } }
+
+#include "simd-5.cc"

gcc/tree-vect-stmts.c

@@ -6345,7 +6345,10 @@ scan_operand_equal_p (tree ref1, tree ref2)
     return false;
   if (maybe_ne (bitsize1, bitsize2))
     return false;
-  if (!operand_equal_p (offset1, offset2, 0))
+  if (offset1 != offset2
+      && (!offset1
+	  || !offset2
+	  || !operand_equal_p (offset1, offset2, 0)))
     return false;
   return true;
 }