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pa.c (override_options): Override TARGET_JUMP_IN_DELAY when scheduling for PA8000 or generating dwarf2...

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* pa.c (override_options): Override TARGET_JUMP_IN_DELAY when scheduling
	for PA8000 or generating dwarf2 call frame information.
	(output_call): Remove DO_FRAME_NOTES check from return pointer
	optimization.
	(following_call): Return 0 when scheduling for PA8000 or generating
	dwarf2 call frame information.  Revise comment.

From-SVN: r53470
This commit is contained in:
John David Anglin 2002-05-15 03:02:23 +00:00 • committed by John David Anglin
parent ac9cfadabb
commit 1c31ecf665
2 changed files with 30 additions and 19 deletions
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9
gcc/ChangeLog
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@ -1,3 +1,12 @@
2002-05-14 John David Anglin <dave@hiauly1.hia.nrc.ca>
* pa.c (override_options): Override TARGET_JUMP_IN_DELAY when scheduling
for PA8000 or generating dwarf2 call frame information.
(output_call): Remove DO_FRAME_NOTES check from return pointer
optimization.
(following_call): Return 0 when scheduling for PA8000 or generating
dwarf2 call frame information. Revise comment.
2002-05-14 Neil Booth <neil@daikokuya.demon.co.uk>
config/alpha:

40
gcc/config/pa/pa.c
View file

@ -250,6 +250,14 @@ override_options ()
warning ("unknown -march= option (%s).\nValid options are 1.0, 1.1, and 2.0\n", pa_arch_string);
}
/* Unconditional branches in the delay slot are not compatible with dwarf2
call frame information. There is no benefit in using this optimization
on PA8000 and later processors. */
if (pa_cpu >= PROCESSOR_8000
|| (! USING_SJLJ_EXCEPTIONS && flag_exceptions)
|| flag_unwind_tables)
target_flags &= ~MASK_JUMP_IN_DELAY;
if (flag_pic && TARGET_PORTABLE_RUNTIME)
{
warning ("PIC code generation is not supported in the portable runtime model\n");
@ -6377,17 +6385,13 @@ output_call (insn, call_dest, sibcall)
distance = INSN_ADDRESSES (INSN_UID (JUMP_LABEL (NEXT_INSN (insn))))
- INSN_ADDRESSES (INSN_UID (seq_insn)) - 8;
/* If the branch was too far away, emit a normal call followed
by a nop, followed by the unconditional branch. We also don't
adjust %r2 when generating dwarf2 frame or unwind info since
the adjustment confuses the dwarf2 output.
If the branch is close, then adjust %r2 from within the
call's delay slot. */
/* If the branch is too far away, emit a normal call followed
by a nop, followed by the unconditional branch. If the branch
is close, then adjust %r2 in the call's delay slot. */
xoperands[0] = call_dest;
xoperands[1] = XEXP (PATTERN (NEXT_INSN (insn)), 1);
if (DO_FRAME_NOTES || ! VAL_14_BITS_P (distance))
if (! VAL_14_BITS_P (distance))
output_asm_insn ("{bl|b,l} %0,%%r2\n\tnop\n\tb,n %1", xoperands);
else
{
@ -6763,22 +6767,20 @@ output_parallel_addb (operands, length)
}
}
/* Return nonzero if INSN (a jump insn) immediately follows a call to
a named function. This is used to discourage creating parallel movb/addb
insns since a jump which immediately follows a call can execute in the
delay slot of the call.
It is also used to avoid filling the delay slot of a jump which
immediately follows a call since the jump can usually be eliminated
completely by modifying RP in the delay slot of the call. */
/* Return nonzero if INSN (a jump insn) immediately follows a call
to a named function. This is used to avoid filling the delay slot
of the jump since it can usually be eliminated by modifying RP in
the delay slot of the call. */
int
following_call (insn)
rtx insn;
{
/* We do not parallel movb,addb or place jumps into call delay slots when
optimizing for the PA8000. */
if (pa_cpu != PROCESSOR_8000)
/* We do not place jumps into call delay slots when optimizing for the
PA8000 processor or when generating dwarf2 call frame information. */
if (pa_cpu >= PROCESSOR_8000
|| (! USING_SJLJ_EXCEPTIONS && flag_exceptions)
|| flag_unwind_tables)
return 0;
/* Find the previous real insn, skipping NOTEs. */