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(mark_target_live_regs): Fix bug in last change. 

From-SVN: r2385
This commit is contained in:
Richard Kenner 1992-10-09 14:13:13 -04:00
parent 9d790a4f73
commit 014830a56d
1 changed files with 3 additions and 13 deletions
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16
gcc/reorg.c
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@ -2171,20 +2171,10 @@ mark_target_live_regs (target, res)
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. */
underlying insn. Any registers set by the underlying insn
are live since the insn is being done somewhere else. */
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);
}
mark_set_resources (XEXP (PATTERN (insn), 0), res, 0, 1);
/* All other USE insns are to be ignored. */
continue;