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Move ir_ctx.unused_live_ranges to local variable

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This commit is contained in:
Dmitry Stogov 2022-05-25 10:57:21 +03:00
parent ab220de623
commit 740cac8e2f
3 changed files with 39 additions and 35 deletions
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4
ir.c
View File

@ -260,7 +260,6 @@ void ir_init(ir_ctx *ctx, ir_ref consts_limit, ir_ref insns_limit)
ctx->vregs = NULL;
ctx->live_intervals = NULL;
ctx->regs = NULL;
ctx->unused_live_ranges = NULL;
ctx->prev_insn_len = NULL;
ctx->data = NULL;
@ -310,9 +309,6 @@ void ir_free(ir_ctx *ctx)
if (ctx->live_intervals) {
ir_free_live_intervals(ctx->live_intervals, ctx->vregs_count);
}
if (ctx->unused_live_ranges) {
ir_free_live_ranges(ctx->unused_live_ranges);
}
if (ctx->regs) {
ir_mem_free(ctx->regs);
}

1
ir.h
View File

@ -606,7 +606,6 @@ typedef struct _ir_ctx {
uint32_t vregs_count;
uint32_t *vregs;
ir_live_interval **live_intervals;
ir_live_range *unused_live_ranges;
ir_regs *regs;
union {
uint32_t *prev_insn_len;

69
ir_ra.c
View File

@ -81,7 +81,7 @@ static void ir_add_local_var(ir_ctx *ctx, int v, uint8_t type)
ctx->live_intervals[v] = ival;
}
static void ir_add_live_range(ir_ctx *ctx, int v, uint8_t type, ir_live_pos start, ir_live_pos end)
static void ir_add_live_range(ir_ctx *ctx, ir_live_range **unused, int v, uint8_t type, ir_live_pos start, ir_live_pos end)
{
ir_live_interval *ival = ctx->live_intervals[v];
ir_live_range *p, *q, *next, *prev;
@ -123,9 +123,9 @@ static void ir_add_live_range(ir_ctx *ctx, int v, uint8_t type, ir_live_pos star
p->end = next->end;
}
p->next = next->next;
/* list of deleted structures is keapt at ctx->unused_live_ranges for reuse */
next->next = ctx->unused_live_ranges;
ctx->unused_live_ranges = next;
/* list of deleted structures is keapt in "unused" list */
next->next = *unused;
*unused = next;
next = p->next;
}
}
@ -134,10 +134,10 @@ static void ir_add_live_range(ir_ctx *ctx, int v, uint8_t type, ir_live_pos star
prev = p;
p = prev->next;
}
if (ctx->unused_live_ranges) {
if (*unused) {
/* reuse */
q = ctx->unused_live_ranges;
ctx->unused_live_ranges = q->next;
q = *unused;
*unused = q->next;
} else {
q = ir_mem_malloc(sizeof(ir_live_range));
}
@ -155,7 +155,7 @@ static void ir_add_live_range(ir_ctx *ctx, int v, uint8_t type, ir_live_pos star
q->next = p;
}
static void ir_add_fixed_live_range(ir_ctx *ctx, ir_reg reg, ir_live_pos start, ir_live_pos end)
static void ir_add_fixed_live_range(ir_ctx *ctx, ir_live_range **unused, ir_reg reg, ir_live_pos start, ir_live_pos end)
{
int v = ctx->vregs_count + 1 + reg;
ir_live_interval *ival = ctx->live_intervals[v];
@ -177,7 +177,7 @@ static void ir_add_fixed_live_range(ir_ctx *ctx, ir_reg reg, ir_live_pos start,
ctx->live_intervals[v] = ival;
return;
}
ir_add_live_range(ctx, v, IR_VOID, start, end);
ir_add_live_range(ctx, unused, v, IR_VOID, start, end);
}
static void ir_add_tmp(ir_ctx *ctx, ir_ref ref, ir_tmp_reg tmp_reg)
@ -314,6 +314,7 @@ int ir_compute_live_ranges(ir_ctx *ctx)
ir_bitset loops = NULL;
ir_bitset queue = NULL;
ir_reg reg;
ir_live_range *unused = NULL;
if (!(ctx->flags & IR_LINEAR) || !ctx->vregs) {
return 0;
@ -358,7 +359,7 @@ int ir_compute_live_ranges(ir_ctx *ctx)
ir_bitset_incl(live, ctx->vregs[insn->ops[k]]);
// TODO: ir_add_live_range() is used just to set ival->type
/* intervals[phi.inputOf(b)].addRange(b.from, b.to) */
ir_add_live_range(ctx, ctx->vregs[insn->ops[k]], insn->type,
ir_add_live_range(ctx, &unused, ctx->vregs[insn->ops[k]], insn->type,
IR_START_LIVE_POS_FROM_REF(bb->start),
IR_END_LIVE_POS_FROM_REF(bb->end));
ir_add_phi_use(ctx, ctx->vregs[insn->ops[k]], k, IR_DEF_LIVE_POS_FROM_REF(bb->end), use);
@ -371,7 +372,7 @@ int ir_compute_live_ranges(ir_ctx *ctx)
/* for each opd in live */
IR_BITSET_FOREACH(live, len, i) {
/* intervals[opd].addRange(b.from, b.to) */
ir_add_live_range(ctx, i, IR_VOID,
ir_add_live_range(ctx, &unused, i, IR_VOID,
IR_START_LIVE_POS_FROM_REF(bb->start),
IR_END_LIVE_POS_FROM_REF(bb->end));
} IR_BITSET_FOREACH_END();
@ -401,10 +402,10 @@ int ir_compute_live_ranges(ir_ctx *ctx)
def_pos = IR_SAVE_LIVE_POS_FROM_REF(i);
if (insn->op == IR_PARAM) {
/* parameter register must be kept before it's copied */
ir_add_fixed_live_range(ctx, reg,
ir_add_fixed_live_range(ctx, &unused, reg,
IR_START_LIVE_POS_FROM_REF(bb->start), def_pos);
} else {
ir_add_fixed_live_range(ctx, reg,
ir_add_fixed_live_range(ctx, &unused, reg,
IR_DEF_LIVE_POS_FROM_REF(i), def_pos);
}
} else if (ctx->rules && ir_result_reuses_op1_reg(ctx, i)) {
@ -450,14 +451,14 @@ int ir_compute_live_ranges(ir_ctx *ctx)
use_pos = IR_LOAD_LIVE_POS_FROM_REF(i);
reg = ctx->rules ? ir_uses_fixed_reg(ctx, i, j) : IR_REG_NONE;
if (reg != IR_REG_NONE) {
ir_add_fixed_live_range(ctx, reg,
ir_add_fixed_live_range(ctx, &unused, reg,
use_pos, IR_USE_LIVE_POS_FROM_REF(i));
}
} else {
reg = ctx->rules ? ir_uses_fixed_reg(ctx, i, j) : IR_REG_NONE;
if (reg != IR_REG_NONE) {
use_pos = IR_LOAD_LIVE_POS_FROM_REF(i);
ir_add_fixed_live_range(ctx, reg,
ir_add_fixed_live_range(ctx, &unused, reg,
use_pos, IR_USE_LIVE_POS_FROM_REF(i));
} else if (j > 1 && input == insn->op1 && ctx->rules && ir_result_reuses_op1_reg(ctx, i)) {
/* Input is the same as "op1" */
@ -467,7 +468,7 @@ int ir_compute_live_ranges(ir_ctx *ctx)
}
}
/* intervals[opd].addRange(b.from, op.id) */
ir_add_live_range(ctx, ctx->vregs[input], ctx->ir_base[input].type,
ir_add_live_range(ctx, &unused, ctx->vregs[input], ctx->ir_base[input].type,
IR_START_LIVE_POS_FROM_REF(bb->start), use_pos);
ir_add_use(ctx, ctx->vregs[input], j, use_pos, reg, 0);
/* live.add(opd) */
@ -475,7 +476,7 @@ int ir_compute_live_ranges(ir_ctx *ctx)
} else if (ctx->rules) {
reg = ir_uses_fixed_reg(ctx, i, j);
if (reg != IR_REG_NONE) {
ir_add_fixed_live_range(ctx, reg,
ir_add_fixed_live_range(ctx, &unused, reg,
IR_LOAD_LIVE_POS_FROM_REF(i), IR_USE_LIVE_POS_FROM_REF(i));
}
}
@ -488,7 +489,7 @@ int ir_compute_live_ranges(ir_ctx *ctx)
if (regset != IR_REGSET_EMPTY) {
IR_REGSET_FOREACH(regset, reg) {
ir_add_fixed_live_range(ctx, reg,
ir_add_fixed_live_range(ctx, &unused, reg,
IR_START_LIVE_POS_FROM_REF(i) + start,
IR_START_LIVE_POS_FROM_REF(i) + end);
} IR_REGSET_FOREACH_END();
@ -519,7 +520,7 @@ int ir_compute_live_ranges(ir_ctx *ctx)
child_bb = &ctx->cfg_blocks[child];
IR_BITSET_FOREACH(live, len, i) {
ir_add_live_range(ctx, i, IR_VOID,
ir_add_live_range(ctx, &unused, i, IR_VOID,
IR_START_LIVE_POS_FROM_REF(child_bb->start),
IR_END_LIVE_POS_FROM_REF(child_bb->end));
} IR_BITSET_FOREACH_END();
@ -542,6 +543,10 @@ int ir_compute_live_ranges(ir_ctx *ctx)
ir_bitset_copy(live + (len * b), live, len);
}
if (unused) {
ir_free_live_ranges(unused);
}
if (loops) {
ir_mem_free(loops);
ir_mem_free(queue);
@ -613,7 +618,7 @@ static ir_live_pos ir_vregs_overlap(ir_ctx *ctx, uint32_t r1, uint32_t r2)
return ir_ivals_overlap(ctx->live_intervals[r1], ctx->live_intervals[r2]);
}
static void ir_vregs_join(ir_ctx *ctx, uint32_t r1, uint32_t r2)
static void ir_vregs_join(ir_ctx *ctx, ir_live_range **unused, uint32_t r1, uint32_t r2)
{
ir_live_interval *ival = ctx->live_intervals[r2];
ir_live_range *live_range = &ival->range;
@ -624,13 +629,13 @@ static void ir_vregs_join(ir_ctx *ctx, uint32_t r1, uint32_t r2)
fprintf(stderr, "COALESCE %d -> %d\n", r2, r1);
#endif
ir_add_live_range(ctx, r1, ival->type, live_range->start, live_range->end);
ir_add_live_range(ctx, unused, r1, ival->type, live_range->start, live_range->end);
live_range = live_range->next;
while (live_range) {
ir_add_live_range(ctx, r1, ival->type, live_range->start, live_range->end);
next = live_range->next;
live_range->next = ctx->unused_live_ranges;
ctx->unused_live_ranges = live_range;
live_range->next = *unused;
*unused = live_range;
ir_add_live_range(ctx, unused, r1, ival->type, live_range->start, live_range->end);
live_range = next;
} while (live_range);
@ -649,7 +654,7 @@ static void ir_vregs_join(ir_ctx *ctx, uint32_t r1, uint32_t r2)
ctx->live_intervals[r1]->flags |= IR_LIVE_INTERVAL_COALESCED;
}
static bool ir_try_coalesce(ir_ctx *ctx, ir_ref from, ir_ref to)
static bool ir_try_coalesce(ir_ctx *ctx, ir_live_range **unused, ir_ref from, ir_ref to)
{
ir_ref i;
int v1 = ctx->vregs[from];
@ -660,13 +665,13 @@ static bool ir_try_coalesce(ir_ctx *ctx, ir_ref from, ir_ref to)
uint8_t f2 = ctx->live_intervals[v2]->flags;
if ((f1 & IR_LIVE_INTERVAL_COALESCED) && !(f2 & IR_LIVE_INTERVAL_COALESCED)) {
ir_vregs_join(ctx, v1, v2);
ir_vregs_join(ctx, unused, v1, v2);
ctx->vregs[to] = v1;
} else if ((f2 & IR_LIVE_INTERVAL_COALESCED) && !(f1 & IR_LIVE_INTERVAL_COALESCED)) {
ir_vregs_join(ctx, v2, v1);
ir_vregs_join(ctx, unused, v2, v1);
ctx->vregs[from] = v2;
} else if (v1 < v2) {
ir_vregs_join(ctx, v1, v2);
ir_vregs_join(ctx, unused, v1, v2);
if (f2 & IR_LIVE_INTERVAL_COALESCED) {
for (i = 0; i < ctx->insns_count; i++) {
if (ctx->vregs[i] == v2) {
@ -677,7 +682,7 @@ static bool ir_try_coalesce(ir_ctx *ctx, ir_ref from, ir_ref to)
ctx->vregs[to] = v1;
}
} else {
ir_vregs_join(ctx, v2, v1);
ir_vregs_join(ctx,unused, v2, v1);
if (f1 & IR_LIVE_INTERVAL_COALESCED) {
for (i = 0; i < ctx->insns_count; i++) {
if (ctx->vregs[i] == v1) {
@ -855,6 +860,7 @@ int ir_coalesce(ir_ctx *ctx)
uint32_t *offsets;
ir_worklist blocks;
bool compact = 0;
ir_live_range *unused = NULL;
/* Collect a list of blocks which are predecossors to block with phi finctions */
ir_worklist_init(&blocks, ctx->cfg_blocks_count + 1);
@ -900,7 +906,7 @@ int ir_coalesce(ir_ctx *ctx)
if (insn->op == IR_PHI) {
input = insn->ops[k];
if (input > 0) {
if (!ir_try_coalesce(ctx, input, use)) {
if (!ir_try_coalesce(ctx, &unused, input, use)) {
ir_add_phi_move(ctx, b, input, use);
} else {
compact = 1;
@ -912,6 +918,9 @@ int ir_coalesce(ir_ctx *ctx)
}
}
}
if (unused) {
ir_free_live_ranges(unused);
}
ir_worklist_free(&blocks);
#if 1