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pa.c (pa_reorg): Always put begin_brtab and end_brtab insns around branch tables.

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* pa.c (pa_reorg): Always put begin_brtab and end_brtab insns
        around branch tables.
        * pa.md (begin_brtab, end_brtab): Only emit the .begin_brtab
        and .end_brtab directives if TARGET_GAS.
Should fix bootstrap problem with PA port when not using gas.

From-SVN: r14899
This commit is contained in:
Jeffrey A Law 1997-08-23 06:19:56 +00:00 committed by Jeff Law
parent 2731427487
commit 251ffdee0e
3 changed files with 40 additions and 16 deletions
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7
gcc/ChangeLog
View File

@ -1,3 +1,10 @@
Sat Aug 23 00:18:22 1997 Jeffrey A Law (law@cygnus.com)
* pa.c (pa_reorg): Always put begin_brtab and end_brtab insns
around branch tables.
* pa.md (begin_brtab, end_brtab): Only emit the .begin_brtab
and .end_brtab directives if TARGET_GAS.
Fri Aug 22 14:05:55 1997 Jim Wilson <wilson@cygnus.com>
* alias.c (true_dependence): Pass x_addr not x to varies.

27
gcc/config/pa/pa.c
View File

@ -5805,7 +5805,14 @@ following_call (insn)
The jump instructions within the table are special; we must be able
to identify them during assembly output (if the jumps don't get filled
we need to emit a nop rather than nullifying the delay slot)). We
identify jumps in switch tables by marking the SET with DImode. */
identify jumps in switch tables by marking the SET with DImode.
We also surround the jump table itself with BEGIN_BRTAB and END_BRTAB
insns. This serves two purposes, first it prevents jump.c from
noticing that the last N entries in the table jump to the instruction
immediately after the table and deleting the jumps. Second, those
insns mark where we should emit .begin_brtab and .end_brtab directives
when using GAS (allows for better link time optimizations). */
pa_reorg (insns)
rtx insns;
@ -5832,9 +5839,8 @@ pa_reorg (insns)
&& GET_CODE (PATTERN (insn)) != ADDR_DIFF_VEC))
continue;
/* If needed, emit marker for the beginning of the branch table. */
if (TARGET_GAS)
emit_insn_before (gen_begin_brtab (), insn);
/* Emit marker for the beginning of the branch table. */
emit_insn_before (gen_begin_brtab (), insn);
pattern = PATTERN (insn);
location = PREV_INSN (insn);
@ -5873,19 +5879,16 @@ pa_reorg (insns)
location = NEXT_INSN (location);
}
/* If needed, emit marker for the end of the branch table. */
if (TARGET_GAS)
{
emit_insn_before (gen_end_brtab (), location);
location = NEXT_INSN (location);
emit_barrier_after (location);
}
/* Emit marker for the end of the branch table. */
emit_insn_before (gen_end_brtab (), location);
location = NEXT_INSN (location);
emit_barrier_after (location);
/* Delete the ADDR_VEC or ADDR_DIFF_VEC. */
delete_insn (insn);
}
}
else if (TARGET_GAS)
else
{
/* Sill need an end_brtab insn. */
insns = get_insns ();

22
gcc/config/pa/pa.md
View File

@ -4397,15 +4397,29 @@
;; begin and end.
(define_insn "begin_brtab"
[(const_int 1)]
"TARGET_GAS"
".begin_brtab"
""
"*
{
/* Only GAS actually supports this pseudo-op. */
if (TARGET_GAS)
return \".begin_brtab\";
else
return \"\";
}"
[(set_attr "type" "move")
(set_attr "length" "0")])
(define_insn "end_brtab"
[(const_int 2)]
"TARGET_GAS"
".end_brtab"
""
"*
{
/* Only GAS actually supports this pseudo-op. */
if (TARGET_GAS)
return \".end_brtab\";
else
return \"\";
}"
[(set_attr "type" "move")
(set_attr "length" "0")])