Support indy concatenation

compiler/testData/codegen/java9/box/concatDynamic.kt

@@ -0,0 +1,14 @@
+// KOTLIN_CONFIGURATION_FLAGS: RUNTIME_STRING_CONCAT=enable
+// JVM_TARGET: 9
+fun box(): String {
+    val p = 3147483648u
+    val a = "_"
+    val b = "_"
+    val s =  a + "1" + "2" + 3 + 4L + b + 5.0 + 6F + '7' + true + false + 3147483647u + p
+
+    return if (s != "_1234_5.06.07truefalse31474836473147483648") "fail $s" else "OK"
+}
+
+fun main() {
+    box().let { if (it != "OK") throw AssertionError(it) }
+}

compiler/testData/codegen/java9/box/concatDynamicIndy200.kt

@@ -0,0 +1,22 @@
+// KOTLIN_CONFIGURATION_FLAGS: RUNTIME_STRING_CONCAT=indy
+// JVM_TARGET: 9
+fun box(): String {
+    val z = "0"
+    val result = z + z + z + z + z + z + z + z + z + z + z + z + z + z + z + z + z + z + z + z +
+            z + z + z + z + z + z + z + z + z + z + z + z + z + z + z + z + z + z + z + z +
+            z + z + z + z + z + z + z + z + z + z + z + z + z + z + z + z + z + z + z + z +
+            z + z + z + z + z + z + z + z + z + z + z + z + z + z + z + z + z + z + z + z +
+            z + z + z + z + z + z + z + z + z + z + z + z + z + z + z + z + z + z + z + z +
+            z + z + z + z + z + z + z + z + z + z + z + z + z + z + z + z + z + z + z + z +
+            z + z + z + z + z + z + z + z + z + z + z + z + z + z + z + z + z + z + z + z +
+            z + z + z + z + z + z + z + z + z + z + z + z + z + z + z + z + z + z + z + z +
+            z + z + z + z + z + z + z + z + z + z + z + z + z + z + z + z + z + z + z + z +
+            z + z + z + z + z + z + z + z + z + z + z + z + z + z + z + z + z + z + z + z   //200
+
+    return if (result.length != 200)
+        "fail: ${result.length}" else "OK"
+}
+
+fun main() {
+    box().let { if (it != "OK") throw AssertionError(it) }
+}

compiler/testData/codegen/java9/box/concatDynamicIndy201.kt

@@ -0,0 +1,23 @@
+// KOTLIN_CONFIGURATION_FLAGS: RUNTIME_STRING_CONCAT=indy
+// JVM_TARGET: 9
+fun box(): String {
+    val z = "0"
+    val result = z + z + z + z + z + z + z + z + z + z + z + z + z + z + z + z + z + z + z + z +
+            z + z + z + z + z + z + z + z + z + z + z + z + z + z + z + z + z + z + z + z +
+            z + z + z + z + z + z + z + z + z + z + z + z + z + z + z + z + z + z + z + z +
+            z + z + z + z + z + z + z + z + z + z + z + z + z + z + z + z + z + z + z + z +
+            z + z + z + z + z + z + z + z + z + z + z + z + z + z + z + z + z + z + z + z +
+            z + z + z + z + z + z + z + z + z + z + z + z + z + z + z + z + z + z + z + z +
+            z + z + z + z + z + z + z + z + z + z + z + z + z + z + z + z + z + z + z + z +
+            z + z + z + z + z + z + z + z + z + z + z + z + z + z + z + z + z + z + z + z +
+            z + z + z + z + z + z + z + z + z + z + z + z + z + z + z + z + z + z + z + z +
+            z + z + z + z + z + z + z + z + z + z + z + z + z + z + z + z + z + z + z + z + //200
+            z //201
+
+    return if (result.length != 201)
+        "fail: ${result.length}" else "OK"
+}
+
+fun main() {
+    box().let { if (it != "OK") throw AssertionError(it) }
+}

compiler/testData/codegen/java9/box/concatDynamicInlineClasses.kt

@@ -0,0 +1,31 @@
+// KOTLIN_CONFIGURATION_FLAGS: RUNTIME_STRING_CONCAT=enable
+// JVM_TARGET: 9
+inline class Str(val s: String)
+inline class NStr(val s: String?)
+
+fun testStr(s: Str?) = "1$s$s"
+fun testNStr(ns: NStr?) = "2$ns$ns"
+
+fun box(): String {
+
+    val test1 = testStr(Str("0"))
+    if (test1 != "1Str(s=0)Str(s=0)") return "fail 1: $test1"
+
+    val test2 = testStr(null)
+    if (test2 != "1nullnull") return "fail 2: $test2"
+
+    val test3 = testNStr(NStr(null))
+    if (test3 != "2NStr(s=null)NStr(s=null)") return "fail 3: $test3"
+
+    val test4 = testNStr(NStr("0"))
+    if (test4 != "2NStr(s=0)NStr(s=0)") return "fail 4: $test4"
+
+    val test5 = testNStr(null)
+    if (test5 != "2nullnull") return "fail 5: $test5"
+
+    return "OK"
+}
+
+fun main() {
+    box().let { if (it != "OK") throw AssertionError(it) }
+}

compiler/testData/codegen/java9/box/concatDynamicWithInline.kt

@@ -0,0 +1,25 @@
+// KOTLIN_CONFIGURATION_FLAGS: RUNTIME_STRING_CONCAT=enable
+// JVM_TARGET: 9
+inline fun test(crossinline s: (String) -> String): String {
+    var result = "1" + s("2") + "3" + 4 + {
+        "5" + s("6") + "7"
+    }()
+
+    result += object  {
+        fun run() = "8" + s("9") + "10"
+    }.run()
+
+    return result
+}
+
+fun box(): String {
+    val result = test { it }
+    if (result != "12345678910")  return "fail 1: $result"
+
+    val result2 = test { it + "_" }
+    return if (result2 != "12_3456_789_10")  "fail 2: $result2" else "OK"
+}
+
+fun main() {
+    box().let { if (it != "OK") throw AssertionError(it) }
+}