re PR tree-optimization/79908 (ICE in gimplify_expr (gimplify.c:12155) gimplification failed)

[gcc]

2017-03-23  Bill Schmidt  <wschmidt@linux.vnet.ibm.com>
            Richard Biener  <rguenth@suse.com>

	PR tree-optimization/79908
	PR tree-optimization/80136
	* tree-stdarg.c (expand_ifn_va_arg_1): For a VA_ARG whose LHS has
	been cast away, gimplify_and_add suffices.

[gcc/testsuite]

2017-03-23  Bill Schmidt  <wschmidt@linux.vnet.ibm.com>
            Richard Biener  <rguenther@suse.de>

	PR tree-optimization/79908
	PR tree-optimization/80136
	* gcc.dg/torture/pr79908.c: New file.

From-SVN: r246418

gcc/ChangeLog

+2017-03-23  Bill Schmidt  <wschmidt@linux.vnet.ibm.com>
+            Richard Biener  <rguenth@suse.com>
+
+	PR tree-optimization/79908
+	PR tree-optimization/80136
+	* tree-stdarg.c (expand_ifn_va_arg_1): For a VA_ARG whose LHS has
+	been cast away, gimplify_and_add suffices.
+
 2017-03-23  Markus Trippelsdorf  <markus@trippelsdorf.de> 
 
 	* tree-vrp.c (identify_jump_threads): Delete avail_exprs.

gcc/testsuite/ChangeLog

+2017-03-23  Bill Schmidt  <wschmidt@linux.vnet.ibm.com>
+            Richard Biener  <rguenther@suse.de>
+
+	PR tree-optimization/79908
+	PR tree-optimization/80136
+	* gcc.dg/torture/pr79908.c: New file.
+
 2017-03-22 Nicolas Koenig <koenigni@student.ethz.ch>
 
-	PR fortran/39239	
+	PR fortran/39239
 	* gfortran.dg/equiv_constraint_bind_c.f90: New test.
 
 2017-03-22  Jakub Jelinek  <jakub@redhat.com>

gcc/testsuite/gcc.dg/torture/pr79908.c

+/* { dg-do compile } */
+
+/* Used to fail in the stdarg pass before fix for PR79908.  */
+
+typedef __builtin_va_list __gnuc_va_list;
+typedef __gnuc_va_list va_list;
+
+void testva (int n, ...)
+{
+  va_list ap;
+  _Complex int i = __builtin_va_arg (ap, _Complex int);
+}

gcc/tree-stdarg.c

@@ -1058,7 +1058,7 @@ expand_ifn_va_arg_1 (function *fun)
 	    gimplify_assign (lhs, expr, &pre);
 	  }
 	else
-	  gimplify_expr (&expr, &pre, &post, is_gimple_lvalue, fb_lvalue);
+	  gimplify_and_add (expr, &pre);
 
 	input_location = saved_location;
 	pop_gimplify_context (NULL);