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mips.c (machine_dependent_reorg): Force a barrier to output the local constant pool if... 

Fri Aug 20 13:43:41 1999  Andrew Haley  <aph@cygnus.com>

	* config/mips/mips.c (machine_dependent_reorg): Force a
	barrier to output the local constant pool if a barrier hasn't
	been found at a natural point in the instruction stream.

From-SVN: r29004
This commit is contained in:
Andrew Haley 1999-08-31 13:56:41 +00:00 committed by Andrew Haley
parent 04b9e2bf66
commit 8230525836
2 changed files with 36 additions and 20 deletions
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6
gcc/ChangeLog
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@ -1,3 +1,9 @@
Fri Aug 20 13:43:41 1999 Andrew Haley <aph@cygnus.com>
* config/mips/mips.c (machine_dependent_reorg): Force a
barrier to output the local constant pool if a barrier hasn't
been found at a natural point in the instruction stream.
Mon Aug 30 22:04:36 1999 Kaveh R. Ghazi <ghazi@caip.rutgers.edu>
* c-parse.in (language_string): Constify.

50
gcc/config/mips/mips.c
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@ -8372,7 +8372,7 @@ void
machine_dependent_reorg (first)
rtx first;
{
int insns_len, max_internal_pool_size, pool_size, addr;
int insns_len, max_internal_pool_size, pool_size, addr, first_constant_ref;
rtx insn;
struct constant *constants;
@ -8440,6 +8440,7 @@ machine_dependent_reorg (first)
constants = NULL;
addr = 0;
first_constant_ref = -1;
for (insn = first; insn; insn = NEXT_INSN (insn))
{
@ -8498,6 +8499,9 @@ machine_dependent_reorg (first)
SET_DEST (PATTERN (insn)),
newsrc);
INSN_CODE (insn) = -1;
if (first_constant_ref < 0)
first_constant_ref = addr;
}
}
@ -8529,27 +8533,33 @@ machine_dependent_reorg (first)
if (constants != NULL)
dump_constants (constants, insn);
constants = NULL;
first_constant_ref = -1;
}
if (constants != NULL
&& (NEXT_INSN (insn) == NULL
|| (first_constant_ref >= 0
&& (((addr - first_constant_ref)
+ 2 /* for alignment */
+ 2 /* for a short jump insn */
+ pool_size)
>= 0x8000))))
{
/* If we haven't had a barrier within 0x8000 bytes of a
constant reference or we are at the end of the function,
emit a barrier now. */
/* ??? If we don't find a barrier within 0x8000 bytes of
instructions and constants in CONSTANTS, we need to invent
one. This seems sufficiently unlikely that I am not going to
worry about it. */
}
if (constants != NULL)
{
rtx label, jump, barrier;
label = gen_label_rtx ();
jump = emit_jump_insn_after (gen_jump (label), get_last_insn ());
JUMP_LABEL (jump) = label;
LABEL_NUSES (label) = 1;
barrier = emit_barrier_after (jump);
emit_label_after (label, barrier);
dump_constants (constants, barrier);
constants = NULL;
}
rtx label, jump, barrier;
label = gen_label_rtx ();
jump = emit_jump_insn_after (gen_jump (label), insn);
JUMP_LABEL (jump) = label;
LABEL_NUSES (label) = 1;
barrier = emit_barrier_after (jump);
emit_label_after (label, barrier);
first_constant_ref = -1;
}
}
/* ??? If we output all references to a constant in internal
constants table, we don't need to output the constant in the real