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m68hc11.c (expand_prologue): For an interrupt handler save the soft registers after the frame pointer so...

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* config/m68hc11/m68hc11.c (expand_prologue): For an interrupt handler
	save the soft registers after the frame pointer so that gdb can unwind
	the frame more easily.
	(expand_epilogue): Likewise in opposite order; allow to use X register
	as scratch if the return value is by reference.

From-SVN: r65104
This commit is contained in:
Stephane Carrez 2003-03-31 22:28:40 +02:00 committed by Stephane Carrez
parent adff28c38d
commit 07faf2d6cd
2 changed files with 17 additions and 9 deletions
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8
gcc/ChangeLog
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@ -1,3 +1,11 @@
2003-03-31 Stephane Carrez <stcarrez@nerim.fr>
* config/m68hc11/m68hc11.c (expand_prologue): For an interrupt handler
save the soft registers after the frame pointer so that gdb can unwind
the frame more easily.
(expand_epilogue): Likewise in opposite order; allow to use X register
as scratch if the return value is by reference.
2003-03-31 Jason Merrill <jason@redhat.com>
PR java/10145

18
gcc/config/m68hc11/m68hc11.c
View File

@ -1683,6 +1683,10 @@ expand_prologue ()
else
scratch = ix_reg;
/* Save current stack frame. */
if (frame_pointer_needed)
emit_move_after_reload (stack_push_word, hard_frame_pointer_rtx, scratch);
/* For an interrupt handler, we must preserve _.tmp, _.z and _.xy.
Other soft registers in page0 need not to be saved because they
will be restored by C functions. For a trap handler, we don't
@ -1697,10 +1701,6 @@ expand_prologue ()
scratch);
}
/* Save current stack frame. */
if (frame_pointer_needed)
emit_move_after_reload (stack_push_word, hard_frame_pointer_rtx, scratch);
/* Allocate local variables. */
if (TARGET_M6812 && (size > 4 || size == 3))
{
@ -1774,7 +1774,7 @@ expand_epilogue ()
else
return_size = GET_MODE_SIZE (GET_MODE (current_function_return_rtx));
if (return_size > HARD_REG_SIZE)
if (return_size > HARD_REG_SIZE && return_size <= 2 * HARD_REG_SIZE)
scratch = iy_reg;
else
scratch = ix_reg;
@ -1821,10 +1821,6 @@ expand_epilogue ()
stack_pointer_rtx, GEN_INT (1)));
}
/* Restore previous frame pointer. */
if (frame_pointer_needed)
emit_move_after_reload (hard_frame_pointer_rtx, stack_pop_word, scratch);
/* For an interrupt handler, restore ZTMP, ZREG and XYREG. */
if (current_function_interrupt)
{
@ -1835,6 +1831,10 @@ expand_epilogue ()
emit_move_after_reload (m68hc11_soft_tmp_reg, stack_pop_word, scratch);
}
/* Restore previous frame pointer. */
if (frame_pointer_needed)
emit_move_after_reload (hard_frame_pointer_rtx, stack_pop_word, scratch);
/* If the trap handler returns some value, copy the value
in D, X onto the stack so that the rti will pop the return value
correctly. */