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ia64.c (spill_restore_mem): Mark iterator initialization as possibly dead.

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* config/ia64/ia64.c (spill_restore_mem): Mark iterator
        initialization as possibly dead.

From-SVN: r48030
This commit is contained in:
Richard Henderson 2001-12-14 18:28:33 -08:00 committed by Richard Henderson
parent 8610ba7050
commit 892a4e60a7
2 changed files with 20 additions and 6 deletions
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5
gcc/ChangeLog
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@ -1,3 +1,8 @@
2001-12-14 Richard Henderson <rth@redhat.com>
* config/ia64/ia64.c (spill_restore_mem): Mark iterator
initialization as possibly dead.
2001-12-14 Richard Henderson <rth@redhat.com>
* regrename.c (mode_change_ok): New.

21
gcc/config/ia64/ia64.c
View File

@ -1771,7 +1771,7 @@ spill_restore_mem (reg, cfa_off)
}
else
{
rtx seq;
rtx seq, insn;
if (disp == 0)
seq = gen_movdi (spill_fill_data.iter_reg[iter],
@ -1797,17 +1797,26 @@ spill_restore_mem (reg, cfa_off)
/* Careful for being the first insn in a sequence. */
if (spill_fill_data.init_after)
spill_fill_data.init_after
= emit_insn_after (seq, spill_fill_data.init_after);
insn = emit_insn_after (seq, spill_fill_data.init_after);
else
{
rtx first = get_insns ();
if (first)
spill_fill_data.init_after
= emit_insn_before (seq, first);
insn = emit_insn_before (seq, first);
else
spill_fill_data.init_after = emit_insn (seq);
insn = emit_insn (seq);
}
spill_fill_data.init_after = insn;
/* If DISP is 0, we may or may not have a further adjustment
afterward. If we do, then the load/store insn may be modified
to be a post-modify. If we don't, then this copy may be
eliminated by copyprop_hardreg_forward, which makes this
insn garbage, which runs afoul of the sanity check in
propagate_one_insn. So mark this insn as legal to delete. */
if (disp == 0)
REG_NOTES(insn) = gen_rtx_EXPR_LIST (REG_MAYBE_DEAD, const0_rtx,
REG_NOTES (insn));
}
mem = gen_rtx_MEM (GET_MODE (reg), spill_fill_data.iter_reg[iter]);