* c-common.c (boolean_increment): New function.

	* c-common.h (enum c_tree_index): Add CTI_C_BOOL_TYPE,
	CTI_C_BOOL_TRUE and CTI_C_BOOL_FALSE.
	(c_bool_type_node, c_bool_true_node, c_bool_false_node): Define.
	(boolean_increment): Declare.
	* c-convert.c (convert): Allow for BOOLEAN_TYPE.
	* c-decl.c (init_decl_processing): Create boolean nodes.
	(finish_struct): Allow for _Bool bitfields.
	* c-parse.in (reswords): Add _Bool.
	(rid_to_yy): Allow for RID_BOOL.
	* c-typeck.c (default_conversion): Make booleans promote to int.
	(convert_arguments, build_unary_op, build_modify_expr,
	convert_for_assignment): Allow for booleans.
	* ginclude/stdbool.h: Make conforming to C99.

cp:
	* typeck.c (build_unary_op): Use boolean_increment from
	c-common.c, moving the relevant code there.

testsuite:
	* gcc.dg/c99-bool-1.c: New test.


git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@37428 138bc75d-0d04-0410-961f-82ee72b054a4

1 files changed, 13 insertions, 0 deletions

diff --git a/gcc/c-common.h b/gcc/c-common.h
index 41e771cf780..06c9c61ac12 100644
--- a/gcc/c-common.h
+++ b/gcc/c-common.h
@@ -130,9 +130,14 @@ enum c_tree_index
     CTI_STRING_TYPE,
     CTI_CONST_STRING_TYPE,
 
+    /* Type for boolean expressions (bool in C++, int in C).  */
     CTI_BOOLEAN_TYPE,
     CTI_BOOLEAN_TRUE,
     CTI_BOOLEAN_FALSE,
+    /* C99's _Bool type.  */
+    CTI_C_BOOL_TYPE,
+    CTI_C_BOOL_TRUE,
+    CTI_C_BOOL_FALSE,
     CTI_DEFAULT_FUNCTION_TYPE,
     CTI_VOID_LIST,
 
@@ -172,6 +177,10 @@ enum c_tree_index
 #define boolean_true_node		c_global_trees[CTI_BOOLEAN_TRUE]
 #define boolean_false_node		c_global_trees[CTI_BOOLEAN_FALSE]
 
+#define c_bool_type_node		c_global_trees[CTI_C_BOOL_TYPE]
+#define c_bool_true_node		c_global_trees[CTI_C_BOOL_TRUE]
+#define c_bool_false_node		c_global_trees[CTI_C_BOOL_FALSE]
+
 #define char_array_type_node		c_global_trees[CTI_CHAR_ARRAY_TYPE]
 #define wchar_array_type_node		c_global_trees[CTI_WCHAR_ARRAY_TYPE]
 #define int_array_type_node		c_global_trees[CTI_INT_ARRAY_TYPE]
@@ -713,6 +722,10 @@ extern tree expand_tree_builtin                 PARAMS ((tree, tree, tree));
 
 extern tree decl_constant_value		PARAMS ((tree));
 
+/* Handle increment and decrement of boolean types.  */
+extern tree boolean_increment			PARAMS ((enum tree_code,
+							 tree));
+
 /* Hook currently used only by the C++ front end to reset internal state
    after entering or leaving a header file.  */
 extern void extract_interface_info		PARAMS ((void));