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(mark_target_live_regs): Look at USE insns made by update_block when scanning forward past target.

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(mark_target_live_regs): Look at USE insns made by update_block when scanning
forward past target.
(mark_target_live_regs, dbr_schedule): Use GET_RTX_CLASS.

From-SVN: r2366
This commit is contained in:
Richard Kenner 1992-10-08 04:42:53 -04:00
parent 3f78332988
commit 1422dce065
1 changed files with 25 additions and 9 deletions
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34
gcc/reorg.c
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@ -2051,9 +2051,7 @@ mark_target_live_regs (target, res)
/* If this insn is a USE made by update_block, we care about the
underlying insn. */
if (GET_CODE (insn) == INSN && GET_CODE (PATTERN (insn)) == USE
&& (GET_CODE (XEXP (PATTERN (insn), 0)) == INSN
|| GET_CODE (XEXP (PATTERN (insn), 0)) == CALL_INSN
|| GET_CODE (XEXP (PATTERN (insn), 0)) == JUMP_INSN))
&& GET_RTX_CLASS (GET_CODE (XEXP (PATTERN (insn), 0))) == 'i')
real_insn = XEXP (PATTERN (insn), 0);
if (GET_CODE (real_insn) == CALL_INSN)
@ -2170,10 +2168,30 @@ mark_target_live_regs (target, res)
continue;
case INSN:
if (GET_CODE (PATTERN (insn)) == USE
|| GET_CODE (PATTERN (insn)) == CLOBBER)
if (GET_CODE (PATTERN (insn)) == USE)
{
/* If INSN is a USE made by update_block, we care about the
underlying insn. Any registers set or referenced by the
underlying insn should be treated as if the insn were
located here without the USE. */
if (GET_RTX_CLASS (GET_CODE (XEXP (PATTERN (insn), 0))) == 'i')
{
rtx inner = XEXP (PATTERN (insn), 0);
mark_referenced_resources (inner, &needed, 1);
mark_set_resources (inner, &set, 0, 1);
COPY_HARD_REG_SET (scratch, set.regs);
AND_COMPL_HARD_REG_SET (scratch, needed.regs);
AND_COMPL_HARD_REG_SET (res->regs, scratch);
}
/* All other USE insns are to be ignored. */
continue;
}
else if (GET_CODE (PATTERN (insn)) == CLOBBER)
continue;
if (GET_CODE (PATTERN (insn)) == SEQUENCE)
else if (GET_CODE (PATTERN (insn)) == SEQUENCE)
{
/* An unconditional jump can be used to fill the delay slot
of a call, so search for a JUMP_INSN in any position. */
@ -3663,9 +3681,7 @@ dbr_schedule (first, file)
next = NEXT_INSN (insn);
if (GET_CODE (insn) == INSN && GET_CODE (PATTERN (insn)) == USE
&& (GET_CODE (XEXP (PATTERN (insn), 0)) == INSN
|| GET_CODE (XEXP (PATTERN (insn), 0)) == JUMP_INSN
|| GET_CODE (XEXP (PATTERN (insn), 0)) == CALL_INSN))
&& GET_RTX_CLASS (GET_CODE (XEXP (PATTERN (insn), 0))) == 'i')
next = delete_insn (insn);
}