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reload1.c (choose_reload_regs): Don't set reload_override_in if EQUIV is clobbered in INSN and the reload is...

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* reload1.c (choose_reload_regs): Don't set reload_override_in
	if EQUIV is clobbered in INSN and the reload is done after INSN.

From-SVN: r20999
This commit is contained in:
J"orn Rennecke 1998-07-07 15:08:34 +00:00 committed by Joern Rennecke
parent 54303b5cb3
commit 3c785e47dc
2 changed files with 26 additions and 5 deletions
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5
gcc/ChangeLog
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@ -1,3 +1,8 @@
Tue Jul 7 23:03:34 1998 J"orn Rennecke <amylaar@cygnus.co.uk>
* reload1.c (choose_reload_regs): Don't set reload_override_in
if EQUIV is clobbered in INSN and the reload is done after INSN.
Tue Jul 7 21:23:36 1998 J"orn Rennecke <amylaar@cygnus.co.uk>
* expr.c (emit_queue): If emitting a SEQUENCE, set QUEUED_INSN

26
gcc/reload1.c
View File

@ -5826,14 +5826,30 @@ choose_reload_regs (insn, avoid_return_reg)
break;
}
/* JRV: If the equiv register we have found is
explicitly clobbered in the current insn, mark but
don't use, as above. */
/* If the equiv register we have found is explicitly clobbered
in the current insn, it depends on the reload type if we
can use it, use it for reload_override_in, or not at all.
In particular, we then can't use EQUIV for a
RELOAD_FOR_OUTPUT_ADDRESS reload. */
if (equiv != 0 && regno_clobbered_p (regno, insn))
{
reload_override_in[r] = equiv;
equiv = 0;
switch (reload_when_needed[r])
{
case RELOAD_FOR_OTHER_ADDRESS:
case RELOAD_FOR_INPADDR_ADDRESS:
case RELOAD_FOR_INPUT_ADDRESS:
case RELOAD_FOR_OPADDR_ADDR:
break;
case RELOAD_OTHER:
case RELOAD_FOR_INPUT:
case RELOAD_FOR_OPERAND_ADDRESS:
reload_override_in[r] = equiv;
/* Fall through. */
default:
equiv = 0;
break;
}
}
/* If we found an equivalent reg, say no code need be generated