From 226a97bbf6c3457172ff356af6a89f5977e0d484 Mon Sep 17 00:00:00 2001
From: Svyatoslav Scherbina <svyatoslav.scherbina@jetbrains.com>
Date: Wed, 21 Mar 2018 11:09:17 +0300
Subject: [PATCH] Improve LLVM symbol name clash detection for classes

---
 .../kotlin/backend/konan/llvm/LlvmDeclarations.kt          | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/backend.native/compiler/ir/backend.native/src/org/jetbrains/kotlin/backend/konan/llvm/LlvmDeclarations.kt b/backend.native/compiler/ir/backend.native/src/org/jetbrains/kotlin/backend/konan/llvm/LlvmDeclarations.kt
index e2a98dc7038..edf9e29ef9e 100644
--- a/backend.native/compiler/ir/backend.native/src/org/jetbrains/kotlin/backend/konan/llvm/LlvmDeclarations.kt
+++ b/backend.native/compiler/ir/backend.native/src/org/jetbrains/kotlin/backend/konan/llvm/LlvmDeclarations.kt
@@ -247,7 +247,12 @@ private class DeclarationsGeneratorVisitor(override val context: Context) :
                     typeInfoGlobal.pointer.getElementPtr(0).llvm,
                     typeInfoSymbolName)!!
 
-            if (!descriptor.isExported()) {
+            if (descriptor.isExported()) {
+                if (llvmTypeInfoPtr.name != typeInfoSymbolName) {
+                    // So alias name has been mangled by LLVM to avoid name clash.
+                    throw IllegalArgumentException("Global '$typeInfoSymbolName' already exists")
+                }
+            } else {
                 LLVMSetLinkage(llvmTypeInfoPtr, LLVMLinkage.LLVMInternalLinkage)
             }