JVM_IR optimize temporary vals initialized with other vals

compiler/testData/codegen/bytecodeText/temporaryVals/arrayCompoundAssignment.kt

@@ -0,0 +1,9 @@
+fun test(xs: IntArray, dx: Int) {
+    for (i in xs.indices) {
+        xs[i] += dx
+    }
+}
+
+// JVM_IR_TEMPLATES
+// 5 ALOAD
+// 6 ILOAD

compiler/testData/codegen/bytecodeText/temporaryVals/safeCallChain1.kt

@@ -0,0 +1,8 @@
+class A(val b: B)
+class B(val c: C)
+class C(val s: String)
+
+fun test(an: A?) = an?.b?.c?.s
+
+// JVM_IR_TEMPLATES
+// 0 ASTORE

compiler/testData/codegen/bytecodeText/temporaryVals/safeCallChain2.kt

@@ -0,0 +1,8 @@
+class A(val bn: B?)
+class B(val cn: C?)
+class C(val s: String)
+
+fun test(an: A?) = an?.bn?.cn?.s
+
+// JVM_IR_TEMPLATES
+// 0 ASTORE

compiler/testData/codegen/bytecodeText/temporaryVals/safeCallChainMemberExt1.kt

@@ -0,0 +1,14 @@
+class A
+class B
+class C
+
+object Host {
+    val A.b: B get() = B()
+    val B.c: C get() = C()
+    val C.s: String get() = "s"
+
+    fun test(an: A?) = an?.b?.c?.s
+}
+
+// JVM_IR_TEMPLATES
+// 0 ASTORE

compiler/testData/codegen/bytecodeText/temporaryVals/safeCallChainMemberExt2.kt

@@ -0,0 +1,18 @@
+import Host.b
+import Host.c
+import Host.s
+
+class A
+class B
+class C
+
+object Host {
+    val A.b: B get() = B()
+    val B.c: C get() = C()
+    val C.s: String get() = "s"
+}
+
+fun test(an: A?) = an?.b?.c?.s
+
+// JVM_IR_TEMPLATES
+// 0 ASTORE