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Reduced number of CFG pass iterations

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This commit is contained in:
Dmitry Stogov
2019-10-14 11:37:10 +03:00
parent 6daa54d3be
commit 5197d0cd5e
1 changed files with 10 additions and 2 deletions
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ext/opcache/Optimizer/block_pass.c
+10 -2
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@@ -537,8 +537,15 @@ static void zend_optimize_block(zend_basic_block *block, zend_op_array *op_array
MAKE_NOP(opline);
block->successors[0] = block->successors[1];
block->len--;
cfg->blocks[block->successors[0]].flags |= ZEND_BB_FOLLOW;
break;
} else {
zend_basic_block *next = cfg->blocks + block->successors[1];
next->flags &= ~ZEND_BB_FOLLOW;
if (!(next->flags & (ZEND_BB_TARGET|ZEND_BB_PROTECTED))) {
next->flags &= ~ZEND_BB_REACHABLE;
}
opline->opcode = ZEND_JMP;
COPY_NODE(opline->op1, opline->op2);
break;
@@ -630,6 +637,7 @@ static void zend_optimize_block(zend_basic_block *block, zend_op_array *op_array
opline->op2.num = 0;
block->successors_count = 1;
block->successors[0] = block->successors[1];
cfg->blocks[block->successors[0]].flags |= ZEND_BB_FOLLOW;
break;
}
} else if (opline->op1_type == IS_TMP_VAR &&
@@ -1855,6 +1863,8 @@ void zend_optimize_cfg(zend_op_array *op_array, zend_optimizer_ctx *ctx)
}
}
opt_count = 0;
/* Jump optimization for each block */
for (b = blocks; b < end; b++) {
if (b->flags & ZEND_BB_REACHABLE) {
@@ -1873,8 +1883,6 @@ void zend_optimize_cfg(zend_op_array *op_array, zend_optimizer_ctx *ctx)
}
}
zend_bitset_clear(usage, bitset_len);
zend_t_usage(&cfg, op_array, usage, ctx);
assemble_code_blocks(&cfg, op_array, ctx);
if (ctx->debug_level & ZEND_DUMP_AFTER_BLOCK_PASS) {