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Update IR

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IR commit: cdf6e44c73d393794ad97b0487318f101c77f1bd
This commit is contained in:
Dmitry Stogov 2024-03-06 22:11:50 +03:00
parent bf0abd1629
commit a541b95a5e
1 changed files with 26 additions and 7 deletions
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33
ext/opcache/jit/ir/ir_cfg.c
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@ -2271,13 +2271,32 @@ restart:
IR_ASSERT(src == ir_chain_head(chains, e->from) && chains[src].tail == e->from);
if (src != dst) {
ir_join_chains(chains, src, dst);
} else if (ctx->ir_base[ctx->cfg_blocks[src].start].op == IR_LOOP_BEGIN
&& ctx->ir_base[ctx->cfg_blocks[src].end].op == IR_IF
&& ctx->ir_base[ctx->cfg_blocks[e->from].end].op == IR_LOOP_END) {
/* rotate loop moving the loop condition to the end */
uint32_t new_head = e->from;
chains[src].head = new_head;
chains[new_head].head = new_head;
} else if (ctx->cfg_blocks[e->from].successors_count < 2) {
/* Try to rotate loop chian to finish it with a conditional branch */
uint32_t tail = e->from;
uint32_t prev = src;
uint32_t next = chains[prev].next;
uint32_t best = 0;
while (prev != tail) {
if (ctx->ir_base[ctx->cfg_blocks[prev].end].op == IR_IF) {
if (ctx->ir_base[ctx->cfg_blocks[prev].start].op == IR_LOOP_BEGIN
&& ctx->cfg_blocks[prev].loop_depth > 1) {
best = next;
break;
} else if (!best || bb_freq[next] < bb_freq[best]) {
/* Find the successor of IF with the least frequency */
best = next;
}
}
prev = next;
next = chains[next].next;
}
if (best) {
/* change the head of the chain */
chains[src].head = best;
chains[best].head = best;
}
}
#if !IR_DEBUG_BB_SCHEDULE_GRAPH
e->from = 0; /* reset "from" to avoid check on step #5 */