Removed hacks

Just moving `-internalized` to the `opt` resolves the issue

backend.native/compiler/ir/backend.native/src/org/jetbrains/kotlin/backend/konan/Context.kt

@@ -385,15 +385,5 @@ internal class Context(config: KonanConfig) : KonanBackendContext(config) {
     val isDynamicLibrary: Boolean by lazy {
         config.configuration.get(KonanConfigKeys.PRODUCE) == CompilerOutputKind.DYNAMIC
     }
-
-    // For wasm32 target we use `llvm-link -internalize` which is kinda broken.
-    // llvm-link links modules one by one and can't see usages
-    // of symbol in subsequent modules. So it will mangle such symbol if
-    // -internalize flag (which is needed for DCE) is provided
-    // That's the case for the stdlib and runtime modules
-    // The solution is to add such symbols to llvm.used array to preserve them from
-    // mangling.
-    fun shouldPreserveRuntimeSymbols(): Boolean =
-            config.targetManager.target == KonanTarget.WASM32
 }
 

backend.native/compiler/ir/backend.native/src/org/jetbrains/kotlin/backend/konan/LinkStage.kt

@@ -84,13 +84,14 @@ internal class LinkStage(val context: Context) {
         runTool(command)
     }
 
+    // TODO: pass different options llvm toolchain
     private fun bitcodeToWasm(bitcodeFiles: List<BitcodeFile>): String {
         val combinedBc = temporary("combined", ".bc")
-        hostLlvmTool("llvm-link", bitcodeFiles + listOf("-o", combinedBc, "-internalize"))
-        val optimizedBc = temporary("optimized", ".bc")
-        hostLlvmTool("opt", listOf(combinedBc, "-o", optimizedBc, "-O2"))
+        hostLlvmTool("llvm-link", bitcodeFiles + listOf("-o", combinedBc))
+        val internalizedBc = temporary("internalized", ".bc")
+        hostLlvmTool("opt", listOf(combinedBc, "-o", internalizedBc, "-internalize", "-O2"))
         val combinedS = temporary("combined", ".s")
-        targetTool("llc", optimizedBc, "-o", combinedS)
+        targetTool("llc", internalizedBc, "-o", combinedS)
 
         val s2wasmFlags = (platform.configurables as WasmConfigurables).s2wasmFlags.toTypedArray()
         val combinedWast = temporary( "combined", ".wast")

backend.native/compiler/ir/backend.native/src/org/jetbrains/kotlin/backend/konan/llvm/IrToBitcode.kt

@@ -657,9 +657,7 @@ internal class CodeGeneratorVisitor(val context: Context, val lifetimes: Map<IrE
 
         val descriptor = declaration.descriptor
 
-        // Preserve symbol from deletion if needed
-        if (descriptor.usedAnnotation
-                || (context.shouldPreserveRuntimeSymbols() && descriptor.isExportedForCppRuntime())) {
+        if (descriptor.usedAnnotation) {
             context.llvm.usedFunctions += codegen.llvmFunction(descriptor)
         }
 

backend.native/compiler/ir/backend.native/src/org/jetbrains/kotlin/backend/konan/llvm/RTTIGenerator.kt

@@ -89,11 +89,6 @@ internal class RTTIGenerator(override val context: Context) : ContextUtils {
             val nameValue = annot.allValueArguments.values.single() as StringValue
             // TODO: use LLVMAddAlias?
             val global = addGlobal(nameValue.value, pointerType(runtime.typeInfoType), isExported = true)
-
-            if (context.shouldPreserveRuntimeSymbols()) {
-                context.llvm.usedGlobals += global
-            }
-
             LLVMSetInitializer(global, typeInfoGlobal)
         }
     }