re PR debug/50983 (incorrect DW_LNS_negate_stmt)

	PR debug/50983
	* dwarf2out.c (set_cur_line_info_table): Restore the last is_stmt
	value in the current line table.

From-SVN: r181269

gcc/ChangeLog

+2011-11-10  Roberto Agostino Vitillo  <ravitillo@lbl.gov>
+
+	PR debug/50983
+	* dwarf2out.c (set_cur_line_info_table): Restore the last is_stmt
+	value in the current line table.
+
 2011-11-10  Nathan Sidwell  <nathan@acm.org>
 
 	* gcov.c (struct function_info): Make src an index, not a pointer.

gcc/dwarf2out.c

@@ -20371,6 +20371,10 @@ set_cur_line_info_table (section *sec)
       VEC_safe_push (dw_line_info_table_p, gc, separate_line_info, table);
     }
 
+  if (DWARF2_ASM_LINE_DEBUG_INFO)
+    table->is_stmt = (cur_line_info_table
+		      ? cur_line_info_table->is_stmt
+		      : DWARF_LINE_DEFAULT_IS_STMT_START);
   cur_line_info_table = table;
 }
 

gcc/testsuite/ChangeLog

+2011-11-10  Jason Merrill  <jason@redhat.com>
+
+	PR debug/50983
+	* gcc.dg/debug/dwarf2/asm-line1.c: New.
+
 2011-11-10  Eric Botcazou  <ebotcazou@adacore.com>
 
 	* gnat.dg/atomic6_1.adb: New test.

gcc/testsuite/gcc.dg/debug/dwarf2/asm-line1.c

+/* PR debug/50983 */
+/* { dg-do compile { target *-*-linux-gnu } } */
+/* { dg-options "-O0 -gdwarf-2" } */
+/* { dg-final { scan-assembler "is_stmt 1" } } */
+
+int i;
+void f() __attribute ((section ("foo")));
+void f() { if (i) ++i; else --i; }
+
+void fun()
+{
+  return;
+}
+
+int main()
+{
+  f();
+  fun();
+  return 0;
+}