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dwarf2out.c (stack_adjust_offset): Handle PRE_MODIFY.

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* dwarf2out.c (stack_adjust_offset): Handle PRE_MODIFY.
	(dwarf2out_frame_debug_expr): Likewise.
	(mem_loc_descriptor): Handle PRE and POST_MODIFY.

From-SVN: r38634
This commit is contained in:
Jan Hubicka 2001-01-02 20:29:12 +01:00 committed by Jan Hubicka
parent 2b589241d8
commit e2134eead7
2 changed files with 41 additions and 2 deletions
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6
gcc/ChangeLog
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@ -1,3 +1,9 @@
Tue Jan 2 20:27:07 MET 2001 Jan Hubicka <jh@suse.cz>
* dwarf2out.c (stack_adjust_offset): Handle PRE_MODIFY.
(dwarf2out_frame_debug_expr): Likewise.
(mem_loc_descriptor): Handle PRE and POST_MODIFY.
Tue Jan 2 20:21:31 MET 2001 Jan Hubicka <jh@suse.cz>
* i386.c (ix86_split_to_parts): Return number of part required;

37
gcc/dwarf2out.c
View File

@ -1130,11 +1130,21 @@ stack_adjust_offset (pattern)
src = XEXP (dest, 0);
code = GET_CODE (src);
if (! (code == PRE_DEC || code == PRE_INC)
if (! (code == PRE_DEC || code == PRE_INC
|| code == PRE_MODIFY)
|| XEXP (src, 0) != stack_pointer_rtx)
return 0;
offset = GET_MODE_SIZE (GET_MODE (dest));
if (code == PRE_MODIFY)
{
rtx val = XEXP (XEXP (src, 1), 1);
/* We handle only adjustments by constant amount. */
if (GET_CODE (XEXP (src, 1)) != PLUS ||
GET_CODE (val) != CONST_INT)
abort();
offset = -INTVAL (val);
}
else offset = GET_MODE_SIZE (GET_MODE (dest));
}
else
return 0;
@ -1418,6 +1428,21 @@ dwarf2out_frame_debug_expr (expr, label)
switch (GET_CODE (XEXP (dest, 0)))
{
/* With a push. */
case PRE_MODIFY:
/* We can't handle variable size modifications. */
if (GET_CODE (XEXP (XEXP (XEXP (dest, 0), 1), 1)) != CONST_INT)
abort();
offset = -INTVAL (XEXP (XEXP (XEXP (dest, 0), 1), 1));
if (REGNO (XEXP (XEXP (dest, 0), 0)) != STACK_POINTER_REGNUM
|| cfa_store.reg != STACK_POINTER_REGNUM)
abort ();
cfa_store.offset += offset;
if (cfa.reg == STACK_POINTER_REGNUM)
cfa.offset = cfa_store.offset;
offset = -cfa_store.offset;
break;
case PRE_INC:
case PRE_DEC:
offset = GET_MODE_SIZE (GET_MODE (dest));
@ -7590,6 +7615,7 @@ mem_loc_descriptor (rtl, mode)
{
case POST_INC:
case POST_DEC:
case POST_MODIFY:
/* POST_INC and POST_DEC can be handled just like a SUBREG. So we
just fall into the SUBREG code. */
@ -7648,6 +7674,12 @@ mem_loc_descriptor (rtl, mode)
mem_loc_result->dw_loc_oprnd1.v.val_addr = save_rtx (rtl);
break;
case PRE_MODIFY:
/* Extract the PLUS expression nested inside and fall into
PLUS code bellow. */
rtl = XEXP (rtl, 1);
goto plus;
case PRE_INC:
case PRE_DEC:
/* Turn these into a PLUS expression and fall into the PLUS code
@ -7660,6 +7692,7 @@ mem_loc_descriptor (rtl, mode)
/* Fall through. */
case PLUS:
plus:
if (is_based_loc (rtl))
mem_loc_result = based_loc_descr (reg_number (XEXP (rtl, 0)),
INTVAL (XEXP (rtl, 1)));