re PR bootstrap/46776 (gogo-tree.cc uses TRAMPOLINE_ALIGNMENT and TRAMPOLINE_SIZE)

	PR bootstrap/46776
	* go-backend.c: New file.
	* go-c.h (go_type_alignment): Declare.
	(go_field_alignment, go_trampoline_info): Declare.
	* Make-lang.in (GO_OBJS): Add go/go-backend.o.
	(go/go-backend.o): New target.
	(go/go-lang.o): Make dependencies match source file.
	(go/expressions.o): Don't depend on $(TM_H) $(TM_P_H).
	(go/gogo-tree.o): Don't depend on $(TM_H).
Remove #include "tm.h" from gofrontend/*.cc.

From-SVN: r167451

1 files changed, 72 insertions, 0 deletions

diff --git a/gcc/go/go-backend.c b/gcc/go/go-backend.c
new file mode 100644
index 0000000..15986dc
--- /dev/null
+++ b/gcc/go/go-backend.c
@@ -0,0 +1,72 @@
+/* go-backend.c -- Go frontend interface to gcc backend.
+   Copyright (C) 2010 Free Software Foundation, Inc.
+
+This file is part of GCC.
+
+GCC is free software; you can redistribute it and/or modify it under
+the terms of the GNU General Public License as published by the Free
+Software Foundation; either version 3, or (at your option) any later
+version.
+
+GCC is distributed in the hope that it will be useful, but WITHOUT ANY
+WARRANTY; without even the implied warranty of MERCHANTABILITY or
+FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+for more details.
+
+You should have received a copy of the GNU General Public License
+along with GCC; see the file COPYING3.  If not see
+<http://www.gnu.org/licenses/>.  */
+
+#include "config.h"
+#include "system.h"
+#include "coretypes.h"
+#include "tree.h"
+#include "tm.h"
+#include "tm_p.h"
+
+#include "go-c.h"
+
+/* This file holds all the cases where the Go frontend needs
+   information from gcc's backend.  */
+
+/* Return the alignment in bytes of a value of type T.  */
+
+unsigned int
+go_type_alignment (tree t)
+{
+  return TYPE_ALIGN_UNIT (t);
+}
+
+/* Return the alignment in bytes of a struct field of type T.  */
+
+unsigned int
+go_field_alignment (tree t)
+{
+  unsigned int v;
+
+  v = TYPE_ALIGN (t);
+
+#ifdef BIGGEST_FIELD_ALIGNMENT
+  if (v > BIGGEST_FIELD_ALIGNMENT)
+    v = BIGGEST_FIELD_ALIGNMENT;
+#endif
+
+#ifdef ADJUST_FIELD_ALIGN
+  {
+    tree field;
+    field = build_decl (UNKNOWN_LOCATION, FIELD_DECL, NULL, t);
+    v = ADJUST_FIELD_ALIGN (field, v);
+  }
+#endif
+
+  return v / BITS_PER_UNIT;
+}
+
+/* Return the size and alignment of a trampoline.  */
+
+void
+go_trampoline_info (unsigned int *size, unsigned int *alignment)
+{
+  *size = TRAMPOLINE_SIZE;
+  *alignment = TRAMPOLINE_ALIGNMENT;
+}