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caller-save.c (insert_one_insn): Initialize the live_before and live_after register sets.

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        * caller-save.c (insert_one_insn): Initialize the live_before and
        live_after register sets.

From-SVN: r23789
This commit is contained in:
Jeff Law 1998-11-23 02:39:24 -07:00
parent 193f66a952
commit 92691d7d53
1 changed files with 8 additions and 0 deletions
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8
gcc/caller-save.c
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@ -728,6 +728,10 @@ insert_one_insn (chain, before_p, code, pat)
chain->prev = new;
new->next = chain;
new->insn = emit_insn_before (pat, insn);
/* ??? It would be nice if we could exclude the already / still saved
registers from the live sets. */
COPY_REG_SET (new->live_before, chain->live_before);
COPY_REG_SET (new->live_after, chain->live_before);
if (chain->insn == basic_block_head[chain->block])
basic_block_head[chain->block] = new->insn;
}
@ -739,6 +743,10 @@ insert_one_insn (chain, before_p, code, pat)
chain->next = new;
new->prev = chain;
new->insn = emit_insn_after (pat, insn);
/* ??? It would be nice if we could exclude the already / still saved
registers from the live sets, and observe REG_UNUSED notes. */
COPY_REG_SET (new->live_before, chain->live_after);
COPY_REG_SET (new->live_after, chain->live_after);
if (chain->insn == basic_block_end[chain->block])
basic_block_end[chain->block] = new->insn;
}