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(initial_reg_note_copy, final_reg_note_copy): New functions.

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(copy_loop_body): Use new function to copy REG_NOTES.

From-SVN: r4481
This commit is contained in:
Richard Stallman 1993-05-16 23:14:24 +00:00
parent 2dff5a062a
commit 6bd4352429
1 changed files with 48 additions and 4 deletions
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52
gcc/unroll.c
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@ -1365,6 +1365,49 @@ calculate_giv_inc (pattern, src_insn, regno)
return increment;
}
/* Copy REG_NOTES, except for insn references, because not all insn_map
entries are valid yet. We do need to copy registers now though, because
the reg_map entries can change during copying. */
static rtx
initial_reg_note_copy (notes, map)
rtx notes;
struct inline_remap *map;
{
rtx copy;
if (notes == 0)
return 0;
copy = rtx_alloc (GET_CODE (notes));
PUT_MODE (copy, GET_MODE (notes));
if (GET_CODE (notes) == EXPR_LIST)
XEXP (copy, 0) = copy_rtx_and_substitute (XEXP (notes, 0), map);
else if (GET_CODE (notes) == INSN_LIST)
/* Don't substitute for these yet. */
XEXP (copy, 0) = XEXP (notes, 0);
else
abort ();
XEXP (copy, 1) = initial_reg_note_copy (XEXP (notes, 1), map);
return copy;
}
/* Fixup insn references in copied REG_NOTES. */
static void
final_reg_note_copy (notes, map)
rtx notes;
struct inline_remap *map;
{
rtx note;
for (note = notes; note; note = XEXP (note, 1))
if (GET_CODE (note) == INSN_LIST)
XEXP (note, 0) = map->insn_map[INSN_UID (XEXP (note, 0))];
}
/* Copy each instruction in the loop, substituting from map as appropriate.
This is very similar to a loop in expand_inline_function. */
@ -1611,7 +1654,7 @@ copy_loop_body (copy_start, copy_end, map, exit_label, last_iteration,
pattern = copy_rtx_and_substitute (pattern, map);
copy = emit_insn (pattern);
}
/* REG_NOTES will be copied later. */
REG_NOTES (copy) = initial_reg_note_copy (REG_NOTES (insn), map);
#ifdef HAVE_cc0
/* If this insn is setting CC0, it may need to look at
@ -1655,6 +1698,7 @@ copy_loop_body (copy_start, copy_end, map, exit_label, last_iteration,
case JUMP_INSN:
pattern = copy_rtx_and_substitute (PATTERN (insn), map);
copy = emit_jump_insn (pattern);
REG_NOTES (copy) = initial_reg_note_copy (REG_NOTES (insn), map);
if (JUMP_LABEL (insn) == start_label && insn == copy_end
&& ! last_iteration)
@ -1756,6 +1800,7 @@ copy_loop_body (copy_start, copy_end, map, exit_label, last_iteration,
case CALL_INSN:
pattern = copy_rtx_and_substitute (PATTERN (insn), map);
copy = emit_call_insn (pattern);
REG_NOTES (copy) = initial_reg_note_copy (REG_NOTES (insn), map);
#ifdef HAVE_cc0
if (cc0_insn)
@ -1806,7 +1851,7 @@ copy_loop_body (copy_start, copy_end, map, exit_label, last_iteration,
}
while (insn != copy_end);
/* Now copy the REG_NOTES. */
/* Now finish coping the REG_NOTES. */
insn = copy_start;
do
{
@ -1814,8 +1859,7 @@ copy_loop_body (copy_start, copy_end, map, exit_label, last_iteration,
if ((GET_CODE (insn) == INSN || GET_CODE (insn) == JUMP_INSN
|| GET_CODE (insn) == CALL_INSN)
&& map->insn_map[INSN_UID (insn)])
REG_NOTES (map->insn_map[INSN_UID (insn)])
= copy_rtx_and_substitute (REG_NOTES (insn), map);
final_reg_note_copy (REG_NOTES (map->insn_map[INSN_UID (insn)]), map);
}
while (insn != copy_end);