com php-src: Disable block pass for large functions: ext/opcache/Optimizer/block_pass.c

Commit:    d6f70f0ee3d5f595a9f6dadaabda834a1d47c662
Author:    Nikita Popov <[email protected]>         Fri, 17 Mar 2017 12:48:03 +0100
Parents:   5c93a31804fe7592d862c12eff15199c55058d72
Branches:  PHP-7.0 PHP-7.1 master

Link:       http://git.php.net/?p=php-src.git;a=commitdiff;h=d6f70f0ee3d5f595a9f6dadaabda834a1d47c662

Log:
Disable block pass for large functions

(Backport of 7ea261685f179a7cddcc4196fc7f3f12572c3d49 to 7.0.)

Changed paths:
  M  ext/opcache/Optimizer/block_pass.c


Diff:
diff --git a/ext/opcache/Optimizer/block_pass.c b/ext/opcache/Optimizer/block_pass.c
index f69199b..413b8b1 100644
--- a/ext/opcache/Optimizer/block_pass.c
+++ b/ext/opcache/Optimizer/block_pass.c
@@ -2000,6 +2000,10 @@ void optimize_cfg(zend_op_array *op_array, zend_optimizer_ctx *ctx)
 		return;
 	}
 
+	if ((uint64_t) op_array->last * (op_array->last_var + op_array->T) > 512 * 1024 * 1024) {
+		return;
+	}
+
     /* Build CFG */
 	checkpoint = zend_arena_checkpoint(ctx->arena);
 	if (!find_code_blocks(op_array, &cfg, ctx)) {