backend.native: tie compiler to runtime

to make compiler able to refer entities declared in runtime

backend.native/build.gradle

@@ -65,6 +65,13 @@ task run(type: JavaExec) {
    main 'org.jetbrains.kotlin.cli.bc.K2NativeKt'
    classpath = sourceSets.main.runtimeClasspath.add(files(['build/classes/main']))
    args '../experiments/translator/src/test/kotlin/tests/classfields_1/classfields_1.kt'
+
+   dependsOn ':runtime:build'
+
+   doFirst {
+       args '-runtime', project(':runtime').build.outputs.files.singleFile
+       println(args)
+   }
 }
 
 task jars {

backend.native/cli.bc/src/org/jetbrains/kotlin/cli/bc/K2NativeCompilerArguments.java

@@ -10,4 +10,8 @@ public class K2NativeCompilerArguments extends CommonCompilerArguments {
     @ValueDescription("<path>")
     public String outputFile;
 
+    @Argument(value = "runtime", description = "Runtime file path")
+    @ValueDescription("<path>")
+    public String runtimeFile;
+
 }

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

@@ -0,0 +1,43 @@
+package org.jetbrains.kotlin.backend.native.llvm
+
+import kotlin_native.interop.*
+import llvm.*
+
+class Runtime(private val bitcodeFile: String) {
+    val llvmModule: LLVMOpaqueModule
+
+    init {
+        val arena = Arena()
+        try {
+
+            val bufRef = arena.alloc(LLVMOpaqueMemoryBuffer.ref)
+            val errorRef = arena.alloc(Int8Box.ref)
+            val res = LLVMCreateMemoryBufferWithContentsOfFile(bitcodeFile, bufRef, errorRef)
+            if (res != 0) {
+                throw Error(errorRef.value?.asCString()?.toString())
+            }
+
+            val moduleRef = arena.alloc(LLVMOpaqueModule.ref)
+            val parseRes = LLVMParseBitcode2(bufRef.value, moduleRef)
+            if (parseRes != 0) {
+                throw Error(parseRes.toString())
+            }
+
+            llvmModule = moduleRef.value!!
+
+        } finally {
+            arena.clear()
+        }
+    }
+
+    val typeInfoType = LLVMGetTypeByName(llvmModule, "struct.TypeInfo")
+    val fieldTableRecordType = LLVMGetTypeByName(llvmModule, "struct.FieldTableRecord")
+    val methodTableRecordType = LLVMGetTypeByName(llvmModule, "struct.MethodTableRecord")
+
+    val target = LLVMGetTarget(llvmModule)!!.asCString().toString()
+
+    val dataLayout = LLVMGetDataLayout(llvmModule)!!.asCString().toString()
+
+    val targetData = LLVMCreateTargetData(dataLayout)
+
+}