* tree.c (restore_tree_status): Also free up temporary storage

	when we finish a toplevel function.
	(dump_tree_statistics): Print stats for backend obstacks.

	* libgcc2.c (__throw): Don't copy the return address.
	* dwarf2out.c (expand_builtin_dwarf_reg_size): Ignore return address.

	* except.c (exceptions_via_longjmp): Initialize to 2 (uninitialized).
	* toplev.c (main): Initialize exceptions_via_longjmp.

	* tree.c: Add extra_inline_obstacks.
	(save_tree_status): Use it.
	(restore_tree_status): If this is a toplevel inline obstack and we
	didn't want to save anything on it, recycle it.
	(print_inline_obstack_statistics): New fn.
	* function.c (pop_function_context_from): Pass context to
	restore_tree_status.
	* obstack.h (obstack_empty_p): New macro.


git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@16050 138bc75d-0d04-0410-961f-82ee72b054a4

1 files changed, 9 insertions, 0 deletions

diff --git a/gcc/toplev.c b/gcc/toplev.c
index 225964b6f0f..41e2c5b87f0 100644
--- a/gcc/toplev.c
+++ b/gcc/toplev.c
@@ -4294,6 +4294,15 @@ main (argc, argv, envp)
   OVERRIDE_OPTIONS;
 #endif
 
+  if (exceptions_via_longjmp == 2)
+    {
+#ifdef DWARF2_UNWIND_INFO
+      exceptions_via_longjmp = ! DWARF2_UNWIND_INFO;
+#else
+      exceptions_via_longjmp = 1;
+#endif
+    }
+
   if (profile_block_flag == 3)
     {
       warning ("`-ax' and `-a' are conflicting options. `-a' ignored.");