Add port done awhile ago for the ARC cpu.

        * arc/arc.h: New file.
        * arc/arc.c: New file.
        * arc/arc.md: New file.
        * arc/initfini.c: New file.
        * arc/lib1funcs.asm: New file.
        * arc/t-arc: New file.
        * arc/xm-arc.h: New file.
        * ginclude/va-arc.h: New file.
        * ginclude/stdarg.h: Include va-arc.h ifdef __arc__.
        * ginclude/varargs.h: Likewise.
        * Makefile.in (USER_H): Add va-arc.h.
        * configure.in (arc-*-elf*): Recognize.
        * longlong.h: Add ARC support.
Mostly so I can test changes in snapshot scripts.

        * expr.c (clear_storage): Use CONST0_RTX instead of const0_rtx.
        when clearing non-BLKmode data.
Fixes sparc problem.

From-SVN: r15198

3 files changed, 119 insertions, 0 deletions

diff --git a/gcc/ginclude/stdarg.h b/gcc/ginclude/stdarg.h
index c497199..431439c 100644
--- a/gcc/ginclude/stdarg.h
+++ b/gcc/ginclude/stdarg.h
@@ -41,6 +41,9 @@
 #if defined (__PPC__) && (defined (_CALL_SYSV) || defined (_WIN32))
 #include "va-ppc.h"
 #else
+#ifdef __arc__
+#include "va-arc.h"
+#else
 #ifdef __M32R__
 #include "va-m32r.h"
 #else
@@ -117,6 +120,7 @@ void va_end (__gnuc_va_list);		/* Defined in libgcc.a */
 #endif /* not mn10300 */
 #endif /* not sh */
 #endif /* not m32r */
+#endif /* not arc */
 #endif /* not powerpc with V.4 calling sequence */
 #endif /* not h8300 */
 #endif /* not alpha */
diff --git a/gcc/ginclude/va-arc.h b/gcc/ginclude/va-arc.h
new file mode 100644
index 0000000..a718ad6
--- /dev/null
+++ b/gcc/ginclude/va-arc.h
@@ -0,0 +1,111 @@
+/* stdarg/varargs support for the ARC */
+
+/* Define __gnuc_va_list.  */
+
+#ifndef __GNUC_VA_LIST
+#define __GNUC_VA_LIST
+typedef void * __gnuc_va_list;
+#endif /* not __GNUC_VA_LIST */
+
+/* If this is for internal libc use, don't define anything but
+   __gnuc_va_list.  */
+#if defined (_STDARG_H) || defined (_VARARGS_H)
+
+/* In GCC version 2, we want an ellipsis at the end of the declaration
+   of the argument list.  GCC version 1 can't parse it.  */
+
+#if __GNUC__ > 1
+#define __va_ellipsis ...
+#else
+#define __va_ellipsis
+#endif
+
+/* See arc_setup_incoming_varargs for reasons for the oddity in va_start.  */
+#ifdef _STDARG_H
+#define va_start(AP, LASTARG) \
+(AP = (__gnuc_va_list) ((int *) __builtin_next_arg (LASTARG) \
+			+ (__builtin_args_info (0) < 8 \
+			   ? (__builtin_args_info (0) & 1) \
+			   : 0)))
+#else
+#define va_alist  __builtin_va_alist
+#define va_dcl    int __builtin_va_alist; __va_ellipsis
+#define va_start(AP) \
+(AP = (__gnuc_va_list) ((int *) &__builtin_va_alist \
+			+ (__builtin_args_info (0) < 8 \
+			   ? (__builtin_args_info (0) & 1) \
+			   : 0)))
+#endif
+
+#ifndef va_end
+void va_end (__gnuc_va_list);		/* Defined in libgcc.a */
+
+/* Values returned by __builtin_classify_type.  */
+
+enum __va_type_classes {
+  __no_type_class = -1,
+  __void_type_class,
+  __integer_type_class,
+  __char_type_class,
+  __enumeral_type_class,
+  __boolean_type_class,
+  __pointer_type_class,
+  __reference_type_class,
+  __offset_type_class,
+  __real_type_class,
+  __complex_type_class,
+  __function_type_class,
+  __method_type_class,
+  __record_type_class,
+  __union_type_class,
+  __array_type_class,
+  __string_type_class,
+  __set_type_class,
+  __file_type_class,
+  __lang_type_class
+};
+
+#endif
+#define va_end(AP)	((void)0)
+
+/* Avoid errors if compiling GCC v2 with GCC v1.  */
+#if __GNUC__ == 1
+#define __extension__
+#endif
+
+/* All aggregates are passed by reference.  All scalar types larger than 8
+   bytes are passed by reference.  */
+/* We cast to void * and then to TYPE * because this avoids
+   a warning about increasing the alignment requirement.
+   The casts to char * avoid warnings about invalid pointer arithmetic.  */
+
+#define __va_rounded_size(TYPE)  \
+  (((sizeof (TYPE) + sizeof (int) - 1) / sizeof (int)) * sizeof (int))
+
+#ifdef __big_endian__
+#define va_arg(AP,TYPE) \
+__extension__							\
+(*({((__builtin_classify_type (*(TYPE*) 0) >= __record_type_class \
+      || __va_rounded_size (TYPE) > 8)				\
+     ? ((AP) = (char *)(AP) + __va_rounded_size (TYPE *),	\
+	*(TYPE **) (void *) ((char *)(AP) - __va_rounded_size (TYPE *))) \
+     : ((TYPE *) (void *)					\
+	(AP = (void *) ((__alignof__ (TYPE) > 4			\
+			 ? ((int) AP + 8 - 1) & -8		\
+			 : (int) AP)				\
+			 + __va_rounded_size (TYPE))) - 1));}))
+#else
+#define va_arg(AP,TYPE) \
+__extension__							\
+(*({((__builtin_classify_type (*(TYPE*) 0) >= __record_type_class \
+      || __va_rounded_size (TYPE) > 8)				\
+     ? ((AP) = (char *)(AP) + __va_rounded_size (TYPE *),	\
+	*(TYPE **) (void *) ((char *)(AP) - __va_rounded_size (TYPE *))) \
+     : ((AP = (void *) ((__alignof__ (TYPE) > 4			\
+			? ((int) AP + 8 - 1) & -8		\
+			: (int) AP)				\
+		       + __va_rounded_size (TYPE))),		\
+	(TYPE *) (void *) (AP - __va_rounded_size (TYPE))));}))
+#endif
+
+#endif /* defined (_STDARG_H) || defined (_VARARGS_H) */
diff --git a/gcc/ginclude/varargs.h b/gcc/ginclude/varargs.h
index dbe9735..cfb5f23 100644
--- a/gcc/ginclude/varargs.h
+++ b/gcc/ginclude/varargs.h
@@ -39,6 +39,9 @@
 #if defined (__PPC__) && (defined (_CALL_SYSV) || defined (_WIN32))
 #include "va-ppc.h"
 #else
+#ifdef __arc__
+#include "va-arc.h"
+#else
 #ifdef __M32R__
 #include "va-m32r.h"
 #else
@@ -134,6 +137,7 @@ typedef void *__gnuc_va_list;
 #endif /* not mn10300 */
 #endif /* not sh */
 #endif /* not m32r */
+#endif /* not arc */
 #endif /* not powerpc with V.4 calling sequence */
 #endif /* not h8300 */
 #endif /* not alpha */