From d65d66c03a92488fefb3ffc63a4b7d7cda226f7d Mon Sep 17 00:00:00 2001
From: Dmitry Petrov <dmitry.petrov@jetbrains.com>
Date: Wed, 14 Jul 2021 07:33:12 +0300
Subject: [PATCH] JVM reserve 2 slots for node predecessors/successors in CFG

---
 .../kotlin/codegen/optimization/common/ControlFlowGraph.kt    | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/compiler/backend/src/org/jetbrains/kotlin/codegen/optimization/common/ControlFlowGraph.kt b/compiler/backend/src/org/jetbrains/kotlin/codegen/optimization/common/ControlFlowGraph.kt
index b2bbc2e1c05..3a89a1ef9ce 100644
--- a/compiler/backend/src/org/jetbrains/kotlin/codegen/optimization/common/ControlFlowGraph.kt
+++ b/compiler/backend/src/org/jetbrains/kotlin/codegen/optimization/common/ControlFlowGraph.kt
@@ -11,8 +11,8 @@ import org.jetbrains.org.objectweb.asm.tree.*
 
 
 class ControlFlowGraph private constructor(private val insns: InsnList) {
-    private val successors: Array<MutableList<Int>> = Array(insns.size()) { ArrayList() }
-    private val predecessors: Array<MutableList<Int>> = Array(insns.size()) { ArrayList() }
+    private val successors: Array<MutableList<Int>> = Array(insns.size()) { ArrayList(2) }
+    private val predecessors: Array<MutableList<Int>> = Array(insns.size()) { ArrayList(2) }
 
     fun getSuccessorsIndices(insn: AbstractInsnNode): List<Int> = getSuccessorsIndices(insns.indexOf(insn))
     fun getSuccessorsIndices(index: Int): List<Int> = successors[index]