+2007-11-02 Bob Wilson <bob.wilson@acm.org>
+
+ * config/xtensa/xtensa.c (xtensa_expand_prologue): Put a
+ REG_FRAME_RELATED_EXPR note on the last insn that sets up the stack
+ pointer or frame pointer.
+ * config/xtensa/xtensa.h (DWARF_UNWIND_INFO): Delete.
+ (MUST_USE_SJLJ_EXCEPTIONS): Define.
+ (DWARF2_UNWIND_INFO): Define.
+ (INCOMING_RETURN_ADDR_RTX): Define.
+ (DWARF_FRAME_RETURN_COLUMN): Define.
+
2007-11-02 Tom Tromey <tromey@redhat.com>
* varpool.c (dump_varpool): Use 'next', not 'next_needed' when
{
HOST_WIDE_INT total_size;
rtx size_rtx;
+ rtx insn, note_rtx;
total_size = compute_frame_size (get_frame_size ());
size_rtx = GEN_INT (total_size);
if (total_size < (1 << (12+3)))
- emit_insn (gen_entry (size_rtx, size_rtx));
+ insn = emit_insn (gen_entry (size_rtx, size_rtx));
else
{
/* Use a8 as a temporary since a0-a7 may be live. */
emit_insn (gen_entry (size_rtx, GEN_INT (MIN_FRAME_SIZE)));
emit_move_insn (tmp_reg, GEN_INT (total_size - MIN_FRAME_SIZE));
emit_insn (gen_subsi3 (tmp_reg, stack_pointer_rtx, tmp_reg));
- emit_move_insn (stack_pointer_rtx, tmp_reg);
+ insn = emit_insn (gen_movsi (stack_pointer_rtx, tmp_reg));
}
if (frame_pointer_needed)
{
if (cfun->machine->set_frame_ptr_insn)
{
- rtx first, insn;
+ rtx first;
push_topmost_sequence ();
first = get_insns ();
}
}
else
- emit_move_insn (hard_frame_pointer_rtx, stack_pointer_rtx);
- }
+ insn = emit_insn (gen_movsi (hard_frame_pointer_rtx,
+ stack_pointer_rtx));
+ }
+
+ /* Create a note to describe the CFA. Because this is only used to set
+ DW_AT_frame_base for debug info, don't bother tracking changes through
+ each instruction in the prologue. It just takes up space. */
+ note_rtx = gen_rtx_SET (VOIDmode, (frame_pointer_needed
+ ? hard_frame_pointer_rtx
+ : stack_pointer_rtx),
+ plus_constant (stack_pointer_rtx, -total_size));
+ RTX_FRAME_RELATED_P (insn) = 1;
+ REG_NOTES (insn) = gen_rtx_EXPR_LIST (REG_FRAME_RELATED_EXPR,
+ note_rtx, REG_NOTES (insn));
}
/* How to start an assembler comment. */
#define ASM_COMMENT_START "#"
-/* Exception handling TODO!! */
-#define DWARF_UNWIND_INFO 0
+/* Generate DWARF2 unwind info to get the DW_AT_frame_base set correctly,
+ even though we don't yet use it for unwinding. */
+#define MUST_USE_SJLJ_EXCEPTIONS 1
+#define DWARF2_UNWIND_INFO 1
+#define INCOMING_RETURN_ADDR_RTX gen_rtx_REG (Pmode, 0)
+#define DWARF_FRAME_RETURN_COLUMN DWARF_FRAME_REGNUM (0)
/* Xtensa constant pool breaks the devices in crtstuff.c to control
section in where code resides. We have to write it as asm code. Use