Handle location in expand_ifn_va_arg_1

2015-06-09  Tom de Vries  <tom@codesourcery.com>

	* tree-stdarg.c (expand_ifn_va_arg_1): Handle location.

	* gcc.target/i386/vararg-loc.c: New test.

From-SVN: r224288

gcc/ChangeLog

+2015-06-09  Tom de Vries  <tom@codesourcery.com>
+
+	* tree-stdarg.c (expand_ifn_va_arg_1): Handle location.
+
 2015-06-09  Jason Merrill  <jason@redhat.com>
 
 	PR bootstrap/66448

gcc/testsuite/ChangeLog

+2015-06-09  Tom de Vries  <tom@codesourcery.com>
+
+	* gcc.target/i386/vararg-loc.c: New test.
+
 2015-06-09  Paolo Carlini  <paolo.carlini@oracle.com>
 
 	PR c++/65815

gcc/testsuite/gcc.target/i386/vararg-loc.c

+/* { dg-do compile } */
+/* { dg-options "-g -O0" } */
+
+#include <stdarg.h>
+
+int				/* 6.  */
+				/* 7.  */
+f (int a, ...)			/* 8.  */
+				/* 9.  */
+{
+
+  int sum = a;
+
+  va_list ap;
+
+  va_start (ap, a);
+
+  sum += va_arg (ap, int);	/* 18.  */
+
+  sum += va_arg (ap, int);	/* 20.  */
+
+  return sum;
+}
+
+/* { dg-final { scan-assembler-not "\\.loc 1 \[6789\] 0" } } */
+/* { dg-final { scan-assembler-times "\\.loc 1 18 0" 1 } } */
+/* { dg-final { scan-assembler-times "\\.loc 1 20 0" 1 } } */

gcc/tree-stdarg.c

@@ -1031,6 +1031,7 @@ expand_ifn_va_arg_1 (function *fun)
   bool modified = false;
   basic_block bb;
   gimple_stmt_iterator i;
+  location_t saved_location;
 
   FOR_EACH_BB_FN (bb, fun)
     for (i = gsi_start_bb (bb); !gsi_end_p (i); gsi_next (&i))
@@ -1051,6 +1052,8 @@ expand_ifn_va_arg_1 (function *fun)
 	ap = build_fold_indirect_ref (ap);
 
 	push_gimplify_context (false);
+	saved_location = input_location;
+	input_location = gimple_location (stmt);
 
 	/* Make it easier for the backends by protecting the valist argument
 	   from multiple evaluations.  */
@@ -1081,6 +1084,7 @@ expand_ifn_va_arg_1 (function *fun)
 	else
 	  gimplify_expr (&expr, &pre, &post, is_gimple_lvalue, fb_lvalue);
 
+	input_location = saved_location;
 	pop_gimplify_context (NULL);
 
 	gimple_seq_add_seq (&pre, post);