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caller-save.c (insert_one_insn): Take into account REG_INC notes for the liveness computation of the new insn.

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* caller-save.c (insert_one_insn): Take into account REG_INC notes
	for the liveness computation of the new insn.

From-SVN: r142099
This commit is contained in:
Eric Botcazou 2008-11-21 21:19:34 +00:00 committed by Eric Botcazou
parent 015e1120e8
commit 0e51e769b5
2 changed files with 9 additions and 2 deletions
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5
gcc/ChangeLog
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@ -1,3 +1,8 @@
2008-11-21 Eric Botcazou <ebotcazou@adacore.com>
* caller-save.c (insert_one_insn): Take into account REG_INC notes
for the liveness computation of the new insn.
2008-11-21 DJ Delorie <dj@redhat.com>
* config/stormy16/stormy16.md (movqi_internal, movhi_internal):

6
gcc/caller-save.c
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@ -1216,10 +1216,12 @@ insert_one_insn (struct insn_chain *chain, int before_p, int code, rtx pat)
/* ??? It would be nice if we could exclude the already / still saved
registers from the live sets. */
COPY_REG_SET (&new_chain->live_throughout, &chain->live_throughout);
/* Registers that die in CHAIN->INSN still live in the new insn. */
/* Registers that die in CHAIN->INSN still live in the new insn.
Likewise for those which are autoincremented or autodecremented. */
for (link = REG_NOTES (chain->insn); link; link = XEXP (link, 1))
{
if (REG_NOTE_KIND (link) == REG_DEAD)
enum reg_note kind = REG_NOTE_KIND (link);
if (kind == REG_DEAD || kind == REG_INC)
{
rtx reg = XEXP (link, 0);
int regno, i;