re PR ipa/66896 (ipa-prop.c:2479 runtime error: member call on null pointer of…

re PR ipa/66896 (ipa-prop.c:2479 runtime error: member call on null pointer of type 'struct ipa_polymorphic_call_context')

Fix PR ipa/66896.

	* g++.dg/ipa/pr66896.c: New test.
	PR ipa/66896.
	* ipa-prop.c (update_jump_functions_after_inlining): Create properly
	dst_ctx if it does not exist.

From-SVN: r225887

gcc/ChangeLog

 2015-07-16  Martin Liska  <mliska@suse.cz>
 
+	PR ipa/66896.
+	* ipa-prop.c (update_jump_functions_after_inlining): Create properly
+	dst_ctx if it does not exist.
+
+2015-07-16  Martin Liska  <mliska@suse.cz>
+
 	* hash-set.h (remove): New function.
 	(iterator): New iteration class for hash_set.
 

gcc/ipa-prop.c

@@ -2377,11 +2377,15 @@ update_jump_functions_after_inlining (struct cgraph_edge *cs,
 	      ctx.offset_by (dst->value.ancestor.offset);
 	      if (!ctx.useless_p ())
 		{
-		  vec_safe_grow_cleared (args->polymorphic_call_contexts,
-					 count);
-		  dst_ctx = ipa_get_ith_polymorhic_call_context (args, i);
+		  if (!dst_ctx)
+		    {
+		      vec_safe_grow_cleared (args->polymorphic_call_contexts,
+					     count);
+		      dst_ctx = ipa_get_ith_polymorhic_call_context (args, i);
+		    }
+
+		  dst_ctx->combine_with (ctx);
 		}
-	      dst_ctx->combine_with (ctx);
 	    }
 
 	  if (src->agg.items

gcc/testsuite/ChangeLog

+2015-07-16  Martin Liska  <mliska@suse.cz>
+
+	* g++.dg/ipa/pr66896.c: New test.
+
 2015-07-16  Richard Biener  <rguenther@suse.de>
 
 	PR tree-optimization/66894