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(sched_analyze_insn, attach_deaths_insn): Look at 

CALL_INSN_FUNCTION_USAGE.

From-SVN: r7263
This commit is contained in:
Richard Kenner 1994-05-07 12:16:15 -04:00
parent ac8ec8c0c9
commit b288f2b339
1 changed files with 17 additions and 0 deletions
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17
gcc/sched.c
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@ -2038,6 +2038,16 @@ sched_analyze_insn (x, insn)
else
sched_analyze_2 (x, insn);
/* Mark registers CLOBBERED or used by called function. */
if (GET_CODE (insn) == CALL_INSN)
for (link = CALL_INSN_FUNCTION_USAGE (insn); link; link = XEXP (link, 1))
{
if (GET_CODE (XEXP (link, 0)) == CLOBBER)
sched_analyze_1 (XEXP (XEXP (link, 0), 0), insn);
else
sched_analyze_2 (XEXP (XEXP (link, 0), 0), insn);
}
/* After reload, it is possible for an instruction to have a REG_DEAD note
for a register that actually dies a few instructions earlier. For
example, this can happen with SECONDARY_MEMORY_NEEDED reloads.
@ -2906,6 +2916,7 @@ attach_deaths_insn (insn)
{
rtx x = PATTERN (insn);
register RTX_CODE code = GET_CODE (x);
rtx link;
if (code == SET)
{
@ -2941,6 +2952,12 @@ attach_deaths_insn (insn)
/* Otherwise don't add a death note to things being clobbered. */
else if (code != CLOBBER)
attach_deaths (x, insn, 0);
/* Make death notes for things used in the called function. */
if (GET_CODE (insn) == CALL_INSN)
for (link = CALL_INSN_FUNCTION_USAGE (insn); link; link = XEXP (link, 1))
attach_deaths (XEXP (XEXP (link, 0), 0), insn,
GET_CODE (XEXP (link, 0)) == CLOBBER);
}
/* Delete notes beginning with INSN and maybe put them in the chain