diff options
Diffstat (limited to 'gcc/reload1.c')
| -rw-r--r-- | gcc/reload1.c | 90 |
1 files changed, 0 insertions, 90 deletions
diff --git a/gcc/reload1.c b/gcc/reload1.c index 5039cee..3ad6f1d 100644 --- a/gcc/reload1.c +++ b/gcc/reload1.c @@ -3234,96 +3234,6 @@ eliminate_regs_in_insn (rtx_insn *insn, int replace) return 0; } - if (old_set != 0 && REG_P (SET_DEST (old_set)) - && REGNO (SET_DEST (old_set)) < FIRST_PSEUDO_REGISTER) - { - /* Check for setting an eliminable register. */ - for (ep = reg_eliminate; ep < ®_eliminate[NUM_ELIMINABLE_REGS]; ep++) - if (ep->from_rtx == SET_DEST (old_set) && ep->can_eliminate) - { - /* If this is setting the frame pointer register to the - hardware frame pointer register and this is an elimination - that will be done (tested above), this insn is really - adjusting the frame pointer downward to compensate for - the adjustment done before a nonlocal goto. */ - if (!HARD_FRAME_POINTER_IS_FRAME_POINTER - && ep->from == FRAME_POINTER_REGNUM - && ep->to == HARD_FRAME_POINTER_REGNUM) - { - rtx base = SET_SRC (old_set); - rtx_insn *base_insn = insn; - HOST_WIDE_INT offset = 0; - - while (base != ep->to_rtx) - { - rtx_insn *prev_insn; - rtx prev_set; - - if (GET_CODE (base) == PLUS - && CONST_INT_P (XEXP (base, 1))) - { - offset += INTVAL (XEXP (base, 1)); - base = XEXP (base, 0); - } - else if ((prev_insn = prev_nonnote_insn (base_insn)) != 0 - && (prev_set = single_set (prev_insn)) != 0 - && rtx_equal_p (SET_DEST (prev_set), base)) - { - base = SET_SRC (prev_set); - base_insn = prev_insn; - } - else - break; - } - - if (base == ep->to_rtx) - { - rtx src = plus_constant (Pmode, ep->to_rtx, - offset - ep->offset); - - new_body = old_body; - if (! replace) - { - new_body = copy_insn (old_body); - if (REG_NOTES (insn)) - REG_NOTES (insn) = copy_insn_1 (REG_NOTES (insn)); - } - PATTERN (insn) = new_body; - old_set = single_set (insn); - - /* First see if this insn remains valid when we - make the change. If not, keep the INSN_CODE - the same and let reload fit it up. */ - validate_change (insn, &SET_SRC (old_set), src, 1); - validate_change (insn, &SET_DEST (old_set), - ep->to_rtx, 1); - if (! apply_change_group ()) - { - SET_SRC (old_set) = src; - SET_DEST (old_set) = ep->to_rtx; - } - - val = 1; - goto done; - } - } - - /* In this case this insn isn't serving a useful purpose. We - will delete it in reload_as_needed once we know that this - elimination is, in fact, being done. - - If REPLACE isn't set, we can't delete this insn, but needn't - process it since it won't be used unless something changes. */ - if (replace) - { - delete_dead_insn (insn); - return 1; - } - val = 1; - goto done; - } - } - /* We allow one special case which happens to work on all machines we currently support: a single set with the source or a REG_EQUAL note being a PLUS of an eliminable register and a constant. */ |