re PR ipa/61921 (ICE: SIGSEGV in varpool_node::get_constructor(), at…

re PR ipa/61921 (ICE: SIGSEGV in varpool_node::get_constructor(), at varpool.c:275 with -O2 -fipa-pta)

2014-07-28  Richard Biener  <rguenther@suse.de>

	PR tree-optimization/61921
	* tree-ssa-structalias.c (create_variable_info_for_1): Check
	if there is a varpool node before dereferencing it.

	* gfortran.dg/pr61921.f90: New testcase.

From-SVN: r213114

gcc/ChangeLog

+2014-07-28  Richard Biener  <rguenther@suse.de>
+
+	PR tree-optimization/61921
+	* tree-ssa-structalias.c (create_variable_info_for_1): Check
+	if there is a varpool node before dereferencing it.
+
 2014-07-28  Roman Gareev  <gareevroman@gmail.com>
 
 	* graphite-sese-to-poly.c:

gcc/testsuite/ChangeLog

 2014-07-28  Richard Biener  <rguenther@suse.de>
 
+	PR tree-optimization/61921
+	* gfortran.dg/pr61921.f90: New testcase.
+
+2014-07-28  Richard Biener  <rguenther@suse.de>
+
 	PR rtl-optimization/61801
 	* gcc.target/i386/pr61801.c: New testcase.
 

gcc/testsuite/gfortran.dg/pr61921.f90

+! { dg-do compile }
+! { dg-options "-O2 -fipa-pta" }
+MODULE min_heap
+  TYPE heap_t
+  END TYPE heap_t
+CONTAINS
+  ELEMENTAL FUNCTION get_left_child(n) RESULT (child)
+    INTEGER, INTENT(IN)                      :: n
+  END FUNCTION get_left_child
+  ELEMENTAL FUNCTION get_value(heap, n) RESULT (value)
+    TYPE(heap_t), INTENT(IN)                 :: heap
+    INTEGER, INTENT(IN)                      :: n
+  END FUNCTION get_value
+END MODULE min_heap
+

gcc/tree-ssa-structalias.c

@@ -5650,6 +5650,7 @@ create_variable_info_for_1 (tree decl, const char *name)
   auto_vec<fieldoff_s> fieldstack;
   fieldoff_s *fo;
   unsigned int i;
+  varpool_node *vnode;
 
   if (!declsize
       || !tree_fits_uhwi_p (declsize))
@@ -5671,7 +5672,8 @@ create_variable_info_for_1 (tree decl, const char *name)
 	 in IPA mode.  Else we'd have to parse arbitrary initializers.  */
       && !(in_ipa_mode
 	   && is_global_var (decl)
-	   && varpool_node::get (decl)->get_constructor ()))
+	   && (vnode = varpool_node::get (decl))
+	   && vnode->get_constructor ()))
     {
       fieldoff_s *fo = NULL;
       bool notokay = false;