From b22fa985e0f258f09447fac7ad47a2a5e6ced380 Mon Sep 17 00:00:00 2001
From: Igor Chevdar <igor.chevdar@jetbrains.com>
Date: Fri, 22 Mar 2019 20:08:49 +0300
Subject: [PATCH] Increased unfold factor size for devirtualized vtable calls

---
 .../kotlin/backend/konan/optimizations/Devirtualization.kt   | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/backend.native/compiler/ir/backend.native/src/org/jetbrains/kotlin/backend/konan/optimizations/Devirtualization.kt b/backend.native/compiler/ir/backend.native/src/org/jetbrains/kotlin/backend/konan/optimizations/Devirtualization.kt
index 4fd7b4491b8..d3c299f4a6c 100644
--- a/backend.native/compiler/ir/backend.native/src/org/jetbrains/kotlin/backend/konan/optimizations/Devirtualization.kt
+++ b/backend.native/compiler/ir/backend.native/src/org/jetbrains/kotlin/backend/konan/optimizations/Devirtualization.kt
@@ -1194,7 +1194,10 @@ internal object Devirtualization {
 
                 val descriptor = expression.descriptor
                 val owner = (descriptor.containingDeclaration as ClassDescriptor)
-                val maxUnfoldFactor = if (owner.isInterface) 3 else 1
+                // TODO: Think how to evaluate different unfold factors (in terms of both execution speed and code size).
+                val classMaxUnfoldFactor = 3
+                val interfaceMaxUnfoldFactor = 3
+                val maxUnfoldFactor = if (owner.isInterface) interfaceMaxUnfoldFactor else classMaxUnfoldFactor
                 if (possibleCallees.size > maxUnfoldFactor) {
                     // Callsite too complicated to devirtualize.
                     return expression