re PR tree-optimization/84452 (ICE in expand_simd_clones at gcc/omp-simd-clone.c:1612)

	PR tree-optimization/84452
	* tree-vect-patterns.c (vect_recog_pow_pattern): Don't call
	expand_simd_clones if targetm.simd_clone.compute_vecsize_and_simdlen
	is NULL.

	* gcc.dg/pr84452.c: New test.

From-SVN: r257819

gcc/ChangeLog

+2018-02-19  Jakub Jelinek  <jakub@redhat.com>
+
+	PR tree-optimization/84452
+	* tree-vect-patterns.c (vect_recog_pow_pattern): Don't call
+	expand_simd_clones if targetm.simd_clone.compute_vecsize_and_simdlen
+	is NULL.
+
 2018-02-19  Martin Liska  <mliska@suse.cz>
 
 	PR sanitizer/82183

gcc/testsuite/ChangeLog

 2018-02-19  Jakub Jelinek  <jakub@redhat.com>
 
+	PR tree-optimization/84452
+	* gcc.dg/pr84452.c: New test.
+
 	PR c++/79064
 	* g++.dg/template/overload15.C (f): Use 0u - 1ll instead of 0u - 1l.
 

gcc/testsuite/gcc.dg/pr84452.c

+/* PR tree-optimization/84452 */
+/* { dg-do compile } */
+/* { dg-options "-Ofast" } */
+
+double pow (double, double) __attribute__((simd));
+double exp (double) __attribute__((simd));
+extern double a[1024], b[1024];
+
+void
+foo (void)
+{
+  for (int i = 0; i < 1024; ++i)
+    a[i] = pow (2.0, b[i]);
+}

gcc/tree-vect-patterns.c

@@ -1113,7 +1113,8 @@ vect_recog_pow_pattern (vec<gimple *> *stmts, tree *type_in,
 	      cgraph_node *node = cgraph_node::get_create (exp_decl);
 	      if (node->simd_clones == NULL)
 		{
-		  if (node->definition)
+		  if (targetm.simd_clone.compute_vecsize_and_simdlen == NULL
+		      || node->definition)
 		    return NULL;
 		  expand_simd_clones (node);
 		  if (node->simd_clones == NULL)