[Wasm] array_new_data with body for bootstrap (KT-79357)

Author: alex28sh

compiler/ir/backend.wasm/src/org/jetbrains/kotlin/backend/wasm/WasmSymbols.kt

@@ -212,7 +212,7 @@ class WasmSymbols(
     val refCastNull = getInternalFunction("wasm_ref_cast_null")
     val wasmArrayCopy = getInternalFunction("wasm_array_copy")
     val wasmArrayNewData0 = getInternalFunction("array_new_data0")
-    val wasmArrayNewData1 = getInternalFunction("array_new_data1")
+    val wasmArrayNewData = getInternalFunction("array_new_data")
     val wasmArrayNewData0CharArray = maybeGetFunction("array_new_data0_char_array", wasmInternalFqName)
 
     val intToLong = getInternalFunction("wasm_i64_extend_i32_s")

compiler/ir/backend.wasm/src/org/jetbrains/kotlin/backend/wasm/ir2wasm/BodyGenerator.kt

@@ -1148,11 +1148,15 @@ class BodyGenerator(
                 body.buildInstr(WasmOp.ARRAY_NEW_DATA, location, arrayGcType, WasmImmediate.DataIdx(0))
             }
 
-            wasmSymbols.wasmArrayNewData1 -> {
+            wasmSymbols.wasmArrayNewData -> {
                 val arrayGcType = WasmImmediate.GcType(
                     wasmFileCodegenContext.referenceGcType(call.typeArguments[0]!!.getRuntimeClass(irBuiltIns).symbol)
                 )
-                body.buildInstr(WasmOp.ARRAY_NEW_DATA, location, arrayGcType, WasmImmediate.DataIdx(1))
+                val dataIdx = (call.arguments[2] as? IrConst)?.value as? Int ?: error("Data idx argument should be int")
+//                if (dataIdxIrConst.kind != IrConstKind.Int) error("")
+//                val dataIdx = dataIdxIrConst.value as Int
+                body.buildDrop(location)
+                body.buildInstr(WasmOp.ARRAY_NEW_DATA, location, arrayGcType, WasmImmediate.DataIdx(dataIdx))
             }
 
             wasmSymbols.wasmArrayNewData0CharArray -> {

compiler/ir/backend.wasm/src/org/jetbrains/kotlin/backend/wasm/lower/WasmTypeOperatorLowering.kt

@@ -328,6 +328,8 @@ class WasmBaseTypeOperatorTransformer(val context: WasmBackendContext) : IrEleme
             is IrCall -> {
                 val function = expression.symbol.owner
 
+                if (function.symbol == context.wasmSymbols.wasmArrayNewData) return false
+
                 val packageFragment = function.getPackageFragment()
                 if (context.getExcludedPackageFragment(packageFragment.packageFqName) == packageFragment) return false
 

libraries/stdlib/wasm/internal/kotlin/wasm/internal/Runtime.kt

@@ -128,7 +128,7 @@ internal fun stringGetPoolSize(): Int =
 @OptIn(ExperimentalStdlibApi::class)
 @EagerInitialization
 internal val stringAddressesAndLengths: WasmLongArray =
-    array_new_data1<WasmLongArray>(0, stringGetPoolSize())
+    array_new_data<WasmLongArray>(0, stringGetPoolSize(), 1)
 
 // This initializer is a special case in FieldInitializersLowering
 @Suppress("DEPRECATION")

libraries/stdlib/wasm/internal/kotlin/wasm/internal/WasmInstructions.kt

@@ -32,9 +32,6 @@ internal fun <T> wasm_array_copy(destination: T, destinationIndex: Int, source:
 internal fun <T> array_new_data0(address: Int, length: Int): T =
     implementedAsIntrinsic
 
-internal fun <T> array_new_data1(address: Int, length: Int): T =
-    implementedAsIntrinsic
-
 internal fun array_new_data0_char_array(address: Int, length: Int): WasmCharArray =
     implementedAsIntrinsic
 

libraries/stdlib/wasm/internal/kotlin/wasm/internal/WasmNewData.kt

@@ -0,0 +1,14 @@
+/*
+ * Copyright 2010-2025 JetBrains s.r.o. and Kotlin Programming Language contributors.
+ * Use of this source code is governed by the Apache 2.0 license that can be found in the license/LICENSE.txt file.
+ */
+
+package kotlin.wasm.internal
+
+// TODO: move to WasmInstructions and remove upper bound and implemntation
+@Suppress("warnings")
+internal fun <T : WasmLongArray> array_new_data(address: Int, length: Int, dataIdx: Int): T {
+    return WasmLongArray(0) as T
+}
+//@ExcludedFromCodegen
+//internal fun <T> array_new_data(address: Int, length: Int, dataIdx: Int): T = implementedAsIntrinsic