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sh.c: Include alloc-pool.h.

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2006-03-11  Steven Bosscher  <stevenb.gcc@gmail.com>

	* config/sh/sh.c: Include alloc-pool.h.
	(label_ref_list_pool): New alloc pool.
	(label_ref_list_t): New type for lists of labels.
	(struct pool_node): Make wend a label_ref_list_t.
	(add_constant): Use the new type, eradicate LABEL_NEXTREF
	references.
	(dump_table): Likewise.
	(sh_reorg): Set up the alloc pool before using add_constant and
	dump_table, and destroy it when finishing.

From-SVN: r111963
This commit is contained in:
Steven Bosscher 2006-03-11 12:52:56 +00:00 committed by Steven Bosscher
parent 59e47e7163
commit 6dd3c0a599
2 changed files with 47 additions and 18 deletions
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12
gcc/ChangeLog
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@ -1,3 +1,15 @@
2006-03-11 Steven Bosscher <stevenb.gcc@gmail.com>
* config/sh/sh.c: Include alloc-pool.h.
(label_ref_list_pool): New alloc pool.
(label_ref_list_t): New type for lists of labels.
(struct pool_node): Make wend a label_ref_list_t.
(add_constant): Use the new type, eradicate LABEL_NEXTREF
references.
(dump_table): Likewise.
(sh_reorg): Set up the alloc pool before using add_constant and
dump_table, and destroy it when finishing.
2006-03-11 Richard Sandiford <richard@codesourcery.com>
* config/mips/mips.c: Remove redundant comment.

53
gcc/config/sh/sh.c
View File

@ -53,6 +53,7 @@ Boston, MA 02110-1301, USA. */
#include "ggc.h"
#include "tree-gimple.h"
#include "cfgloop.h"
#include "alloc-pool.h"
int code_for_indirect_jump_scratch = CODE_FOR_indirect_jump_scratch;
@ -2964,6 +2965,14 @@ gen_datalabel_ref (rtx sym)
}
static alloc_pool label_ref_list_pool;
typedef struct label_ref_list_d
{
rtx label;
struct label_ref_list_d *next;
} *label_ref_list_t;
/* The SH cannot load a large constant into a register, constants have to
come from a pc relative load. The reference of a pc relative load
instruction must be less than 1k in front of the instruction. This
@ -3021,7 +3030,7 @@ typedef struct
{
rtx value; /* Value in table. */
rtx label; /* Label of value. */
rtx wend; /* End of window. */
label_ref_list_t wend; /* End of window. */
enum machine_mode mode; /* Mode of value. */
/* True if this constant is accessed as part of a post-increment
@ -3055,7 +3064,8 @@ static rtx
add_constant (rtx x, enum machine_mode mode, rtx last_value)
{
int i;
rtx lab, new, ref, newref;
rtx lab, new;
label_ref_list_t ref, newref;
/* First see if we've already got it. */
for (i = 0; i < pool_size; i++)
@ -3081,9 +3091,10 @@ add_constant (rtx x, enum machine_mode mode, rtx last_value)
}
if (lab && pool_window_label)
{
newref = gen_rtx_LABEL_REF (VOIDmode, pool_window_label);
newref = (label_ref_list_t) pool_alloc (label_ref_list_pool);
newref->label = pool_window_label;
ref = pool_vector[pool_window_last].wend;
LABEL_NEXTREF (newref) = ref;
newref->next = ref;
pool_vector[pool_window_last].wend = newref;
}
if (new)
@ -3105,13 +3116,14 @@ add_constant (rtx x, enum machine_mode mode, rtx last_value)
lab = gen_label_rtx ();
pool_vector[pool_size].mode = mode;
pool_vector[pool_size].label = lab;
pool_vector[pool_size].wend = NULL_RTX;
pool_vector[pool_size].wend = NULL;
pool_vector[pool_size].part_of_sequence_p = (lab == 0);
if (lab && pool_window_label)
{
newref = gen_rtx_LABEL_REF (VOIDmode, pool_window_label);
newref = (label_ref_list_t) pool_alloc (label_ref_list_pool);
newref->label = pool_window_label;
ref = pool_vector[pool_window_last].wend;
LABEL_NEXTREF (newref) = ref;
newref->next = ref;
pool_vector[pool_window_last].wend = newref;
}
if (lab)
@ -3133,7 +3145,8 @@ dump_table (rtx start, rtx barrier)
rtx scan = barrier;
int i;
int need_align = 1;
rtx lab, ref;
rtx lab;
label_ref_list_t ref;
int have_df = 0;
/* Do two passes, first time dump out the HI sized constants. */
@ -3153,9 +3166,9 @@ dump_table (rtx start, rtx barrier)
scan = emit_label_after (lab, scan);
scan = emit_insn_after (gen_consttable_2 (p->value, const0_rtx),
scan);
for (ref = p->wend; ref; ref = LABEL_NEXTREF (ref))
for (ref = p->wend; ref; ref = ref->next)
{
lab = XEXP (ref, 0);
lab = ref->label;
scan = emit_insn_after (gen_consttable_window_end (lab), scan);
}
}
@ -3203,9 +3216,9 @@ dump_table (rtx start, rtx barrier)
emit_label_before (lab, align_insn);
emit_insn_before (gen_consttable_4 (p->value, const0_rtx),
align_insn);
for (ref = p->wend; ref; ref = LABEL_NEXTREF (ref))
for (ref = p->wend; ref; ref = ref->next)
{
lab = XEXP (ref, 0);
lab = ref->label;
emit_insn_before (gen_consttable_window_end (lab),
align_insn);
}
@ -3241,9 +3254,9 @@ dump_table (rtx start, rtx barrier)
if (p->mode != HImode)
{
for (ref = p->wend; ref; ref = LABEL_NEXTREF (ref))
for (ref = p->wend; ref; ref = ref->next)
{
lab = XEXP (ref, 0);
lab = ref->label;
scan = emit_insn_after (gen_consttable_window_end (lab),
scan);
}
@ -3293,9 +3306,9 @@ dump_table (rtx start, rtx barrier)
if (p->mode != HImode)
{
for (ref = p->wend; ref; ref = LABEL_NEXTREF (ref))
for (ref = p->wend; ref; ref = ref->next)
{
lab = XEXP (ref, 0);
lab = ref->label;
scan = emit_insn_after (gen_consttable_window_end (lab), scan);
}
}
@ -4517,9 +4530,12 @@ sh_reorg (void)
mdep_reorg_phase = SH_SHORTEN_BRANCHES0;
shorten_branches (first);
}
/* Scan the function looking for move instructions which have to be
changed to pc-relative loads and insert the literal tables. */
label_ref_list_pool = create_alloc_pool ("label references list",
sizeof (struct label_ref_list_d),
30);
mdep_reorg_phase = SH_FIXUP_PCLOAD;
for (insn = first, num_mova = 0; insn; insn = NEXT_INSN (insn))
{
@ -4700,7 +4716,8 @@ sh_reorg (void)
insn = barrier;
}
}
free_alloc_pool (label_ref_list_pool);
mdep_reorg_phase = SH_SHORTEN_BRANCHES1;
INSN_ADDRESSES_FREE ();
split_branches (first);