* builtins.c (expand_builtin_saveregs): Remove static, remove exp

        and ignore arguments, bail if no EXPAND_BUILTIN_SAVEREGS.
        (expand_builtin_next_arg): Accept ARGLIST not EXP.
        (stabilize_va_list): New function.
        (std_expand_builtin_va_start): New function.
        (expand_builtin_va_start): New function.
        (get_varargs_alias_set): New function.
        (std_expand_builtin_va_arg): New function.
        (expand_builtin_va_arg): New function.
        (expand_builtin_va_end): New function.
        (expand_builtin_va_copy): New function.
        (expand_builtin): Call them.
        * c-common.c (c_common_nodes_and_builtins): Build __builtin_va_list,
        __builtin_{varargs_start,stdarg_start,end,copy}.
        (build_va_arg): New function.
        * c-common.h (CTI_PTR_TYPE, ptr_type_node): Delete.
        (build_va_arg): Declare.
        * c-decl.c (ptr_type_node, va_list_type_node): New.
        * c-parse.gperf (__builtin_va_arg): New.
        * c-parse.in (VA_ARG): New token.
        (unary_expr): Recognize it.
        * expr.c (expand_expr): Expand VA_ARG_EXPR.
        * expr.h (std_expand_builtin_va_start): Declare.
        (std_expand_builtin_va_arg): Declare.
        (expand_builtin_va_arg): Declare.
        (get_varargs_alias_set): Declare.
        * tree.def (VA_ARG_EXPR): New.
        * tree.h (BUILT_IN_VARARGS_START): New.
        (BUILT_IN_STDARG_START, BUILT_IN_VA_END): New.
        (ptr_type_node, va_list_type_node): Declare.
        * tm.texi (EXPAND_BUILTIN_SAVEREGS): Kill unused ARGLIST argument.
        * m32r.h (EXPAND_BUILTIN_SAVEREGS): Likewise.
        * m88k.h, m88k.c: Likewise.
        * mn10300.h, mn10300.c: Likewise.
        * pa.h, pa.c: Likewise.
        * rs6000.h, rs6000.c: Likewise.
        * sh.h, sh.c: Likewise.
        * sparc.h, sparc.c: Likewise.

        * emit-rtl.c (operand_subword): Copy alias set.
        (change_address): Likewise.


git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@28243 138bc75d-0d04-0410-961f-82ee72b054a4

1 files changed, 48 insertions, 0 deletions

diff --git a/gcc/c-common.c b/gcc/c-common.c
index fca01233694..50a27fee96b 100644
--- a/gcc/c-common.c
+++ b/gcc/c-common.c
@@ -3434,6 +3434,16 @@ c_common_nodes_and_builtins (cplus_mode, no_builtins, no_nonansi_builtins)
   tree long_ftype_long;
   /* Either char* or void*.  */
   tree traditional_ptr_type_node;
+  tree va_list_ptr_type_node;
+
+#ifdef BUILD_VA_LIST_TYPE
+  BUILD_VA_LIST_TYPE(va_list_type_node);
+#else
+  va_list_type_node = ptr_type_node;
+#endif
+  pushdecl (build_decl (TYPE_DECL, get_identifier ("__builtin_va_list"),
+			va_list_type_node));
+  va_list_ptr_type_node = build_pointer_type (va_list_type_node);
 
   endlink = void_list_node;
   int_endlink = tree_cons (NULL_TREE, integer_type_node, endlink);
@@ -3608,6 +3618,37 @@ c_common_nodes_and_builtins (cplus_mode, no_builtins, no_nonansi_builtins)
   builtin_function ("__builtin_return", void_ftype_ptr,
 		    BUILT_IN_RETURN, NULL_PTR);
 
+  /* Support for varargs.h and stdarg.h.  */
+  builtin_function ("__builtin_varargs_start",
+		    build_function_type (void_type_node,
+					 tree_cons (NULL_TREE,
+						    va_list_ptr_type_node,
+						    endlink)),
+		    BUILT_IN_VARARGS_START, NULL_PTR);
+
+  builtin_function ("__builtin_stdarg_start",
+		    build_function_type (void_type_node,
+					 tree_cons (NULL_TREE,
+						    va_list_ptr_type_node,
+						    NULL_TREE)),
+		    BUILT_IN_STDARG_START, NULL_PTR);
+
+  builtin_function ("__builtin_va_end",
+		    build_function_type (void_type_node,
+					 tree_cons (NULL_TREE,
+						    va_list_type_node,
+						    endlink)),
+		    BUILT_IN_VA_END, NULL_PTR);
+
+  builtin_function ("__builtin_va_copy",
+		    build_function_type (void_type_node,
+					 tree_cons (NULL_TREE,
+						    va_list_ptr_type_node,
+						    tree_cons (NULL_TREE,
+						      va_list_type_node,
+						      endlink))),
+		    BUILT_IN_VA_COPY, NULL_PTR);
+
   /* Currently under experimentation.  */
   builtin_function ("__builtin_memcpy", memcpy_ftype, BUILT_IN_MEMCPY,
 		    "memcpy");
@@ -3712,3 +3753,10 @@ c_common_nodes_and_builtins (cplus_mode, no_builtins, no_nonansi_builtins)
 		    NULL_PTR);
 #endif
 }
+
+tree
+build_va_arg (expr, type)
+     tree expr, type;
+{
+  return build1 (VA_ARG_EXPR, type, expr);
+}