re PR c++/84444 (ICE with __builtin_launder and cast)

	PR c++/84444
	* builtins.c (builtin_mathfn_code): Don't check if CALL_EXPR_FN (t)
	is ADDR_EXPR.

	* g++.dg/cpp1z/launder8.C: New test.

From-SVN: r257822

gcc/ChangeLog

 2018-02-19  Jakub Jelinek  <jakub@redhat.com>
 
+	PR c++/84444
+	* builtins.c (builtin_mathfn_code): Don't check if CALL_EXPR_FN (t)
+	is ADDR_EXPR.
+
 	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

gcc/builtins.c

@@ -7836,8 +7836,7 @@ builtin_mathfn_code (const_tree t)
   const_tree argtype, parmtype;
   const_call_expr_arg_iterator iter;
 
-  if (TREE_CODE (t) != CALL_EXPR
-      || TREE_CODE (CALL_EXPR_FN (t)) != ADDR_EXPR)
+  if (TREE_CODE (t) != CALL_EXPR)
     return END_BUILTINS;
 
   fndecl = get_callee_fndecl (t);

gcc/testsuite/ChangeLog

 2018-02-19  Jakub Jelinek  <jakub@redhat.com>
 
+	PR c++/84444
+	* g++.dg/cpp1z/launder8.C: New test.
+
 	PR c++/84448
 	* g++.dg/gomp/pr84448.C: New test.
 

gcc/testsuite/g++.dg/cpp1z/launder8.C

+// PR c++/84444
+// { dg-do compile }
+// { dg-options "-O2" }
+
+struct A {};
+
+__UINTPTR_TYPE__
+foo (A *p)
+{
+  return (__UINTPTR_TYPE__) __builtin_launder (p);
+}