Maintain proper evaluation order for 'a in x .. y'

As of Kotlin 1.0 and 1.1, expression 'a in x .. y' is considered
equivalent to 'x.rangeTo(y).a', and should be evaluated in the following
order:
1. x
2. y
3. a
4. compare x with a
5. compare y with a (if needed)

compiler/backend/src/org/jetbrains/kotlin/codegen/range/AbstractBoundedValue.kt

@@ -0,0 +1,37 @@
+/*
+ * Copyright 2010-2017 JetBrains s.r.o.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.jetbrains.kotlin.codegen.range
+
+import org.jetbrains.kotlin.codegen.ExpressionCodegen
+import org.jetbrains.kotlin.codegen.StackValue
+import org.jetbrains.kotlin.descriptors.CallableDescriptor
+import org.jetbrains.kotlin.resolve.calls.model.ResolvedCall
+import org.jetbrains.org.objectweb.asm.Type
+import org.jetbrains.org.objectweb.asm.commons.InstructionAdapter
+
+abstract class AbstractBoundedValue(
+        protected val codegen: ExpressionCodegen,
+        protected val rangeCall: ResolvedCall<out CallableDescriptor>,
+        override val isLowInclusive: Boolean = true,
+        override val isHighInclusive: Boolean = true
+) : BoundedValue {
+    override val instanceType: Type = codegen.asmType(rangeCall.resultingDescriptor.returnType!!)
+
+    override fun putInstance(v: InstructionAdapter, type: Type) {
+        codegen.invokeFunction(rangeCall.call, rangeCall, StackValue.none()).put(type, v)
+    }
+}

compiler/backend/src/org/jetbrains/kotlin/codegen/range/ArrayIndicesRangeValue.kt

@@ -25,19 +25,21 @@ import org.jetbrains.kotlin.psi.KtForExpression
 import org.jetbrains.kotlin.resolve.calls.model.ResolvedCall
 import org.jetbrains.kotlin.types.KotlinType
 import org.jetbrains.org.objectweb.asm.Type
+import org.jetbrains.org.objectweb.asm.commons.InstructionAdapter
 
 class ArrayIndicesRangeValue(rangeCall: ResolvedCall<out CallableDescriptor>): PrimitiveNumberRangeIntrinsicRangeValue(rangeCall) {
     private val expectedReceiverType: KotlinType = ExpressionCodegen.getExpectedReceiverType(rangeCall)
 
     override fun getBoundedValue(codegen: ExpressionCodegen) =
-            SimpleBoundedValue(
-                    codegen, rangeCall,
-                    lowBound = StackValue.constant(0, asmElementType),
-                    highBound = StackValue.operation(Type.INT_TYPE) { v ->
-                        codegen.generateCallReceiver(rangeCall).put(codegen.asmType(expectedReceiverType), v)
-                        v.arraylength()
-                    }
-            )
+            object : AbstractBoundedValue(codegen, rangeCall) {
+                override fun putHighLow(v: InstructionAdapter, type: Type) {
+                    codegen.generateCallReceiver(rangeCall).put(codegen.asmType(expectedReceiverType), v)
+                    v.arraylength()
+                    StackValue.coerce(Type.INT_TYPE, type, v)
+
+                    StackValue.constant(0, asmElementType).put(type, v)
+                }
+            }
 
     override fun createForLoopGenerator(codegen: ExpressionCodegen, forExpression: KtForExpression) =
             ForInArrayIndicesRangeLoopGenerator(codegen, forExpression, rangeCall)

compiler/backend/src/org/jetbrains/kotlin/codegen/range/CharSequenceIndicesRangeValue.kt

@@ -25,19 +25,21 @@ import org.jetbrains.kotlin.psi.KtForExpression
 import org.jetbrains.kotlin.resolve.calls.model.ResolvedCall
 import org.jetbrains.kotlin.types.KotlinType
 import org.jetbrains.org.objectweb.asm.Type
+import org.jetbrains.org.objectweb.asm.commons.InstructionAdapter
 
 class CharSequenceIndicesRangeValue(rangeCall: ResolvedCall<out CallableDescriptor>): PrimitiveNumberRangeIntrinsicRangeValue(rangeCall) {
     private val expectedReceiverType: KotlinType = ExpressionCodegen.getExpectedReceiverType(rangeCall)
 
     override fun getBoundedValue(codegen: ExpressionCodegen) =
-            SimpleBoundedValue(
-                    codegen, rangeCall,
-                    lowBound = StackValue.constant(0, asmElementType),
-                    highBound = StackValue.operation(Type.INT_TYPE) { v ->
-                        codegen.generateCallReceiver(rangeCall).put(codegen.asmType(expectedReceiverType), v)
-                        v.invokeinterface("java/lang/CharSequence", "length", "()I")
-                    }
-            )
+            object : AbstractBoundedValue(codegen, rangeCall) {
+                override fun putHighLow(v: InstructionAdapter, type: Type) {
+                    codegen.generateCallReceiver(rangeCall).put(codegen.asmType(expectedReceiverType), v)
+                    v.invokeinterface("java/lang/CharSequence", "length", "()I")
+                    StackValue.coerce(Type.INT_TYPE, type, v)
+
+                    StackValue.constant(0, asmElementType).put(type, v)
+                }
+            }
 
     override fun createForLoopGenerator(codegen: ExpressionCodegen, forExpression: KtForExpression) =
             ForInCharSequenceIndicesRangeLoopGenerator(codegen, forExpression, rangeCall)

compiler/backend/src/org/jetbrains/kotlin/codegen/range/CollectionIndicesRangeValue.kt

@@ -25,19 +25,21 @@ import org.jetbrains.kotlin.psi.KtForExpression
 import org.jetbrains.kotlin.resolve.calls.model.ResolvedCall
 import org.jetbrains.kotlin.types.KotlinType
 import org.jetbrains.org.objectweb.asm.Type
+import org.jetbrains.org.objectweb.asm.commons.InstructionAdapter
 
 class CollectionIndicesRangeValue(rangeCall: ResolvedCall<out CallableDescriptor>): PrimitiveNumberRangeIntrinsicRangeValue(rangeCall) {
     private val expectedReceiverType: KotlinType = ExpressionCodegen.getExpectedReceiverType(rangeCall)
 
     override fun getBoundedValue(codegen: ExpressionCodegen) =
-            SimpleBoundedValue(
-                    codegen, rangeCall,
-                    lowBound = StackValue.constant(0, asmElementType),
-                    highBound = StackValue.operation(Type.INT_TYPE) { v ->
-                        codegen.generateCallReceiver(rangeCall).put(codegen.asmType(expectedReceiverType), v)
-                        v.invokeinterface("java/util/Collection", "size", "()I")
-                    }
-            )
+            object : AbstractBoundedValue(codegen, rangeCall) {
+                override fun putHighLow(v: InstructionAdapter, type: Type) {
+                    codegen.generateCallReceiver(rangeCall).put(codegen.asmType(expectedReceiverType), v)
+                    v.invokeinterface("java/util/Collection", "size", "()I")
+                    StackValue.coerce(Type.INT_TYPE, type, v)
+
+                    StackValue.constant(0, asmElementType).put(type, v)
+                }
+            }
 
     override fun createForLoopGenerator(codegen: ExpressionCodegen, forExpression: KtForExpression) =
             ForInCollectionIndicesRangeLoopGenerator(codegen, forExpression, rangeCall)

compiler/backend/src/org/jetbrains/kotlin/codegen/range/RangeValue.kt

@@ -37,7 +37,10 @@ interface BoundedValue {
 
     fun putInstance(v: InstructionAdapter, type: Type)
 
+    // It is necessary to maintain the proper evaluation order as of Kotlin 1.0 and 1.1
+    // to evaluate range bounds left to right and put them on stack as 'high; low'.
     fun putHighLow(v: InstructionAdapter, type: Type)
+
     val isLowInclusive: Boolean
     val isHighInclusive: Boolean
 }

compiler/backend/src/org/jetbrains/kotlin/codegen/range/SimpleBoundedValue.kt

@@ -16,23 +16,20 @@
 
 package org.jetbrains.kotlin.codegen.range
 
-import org.jetbrains.kotlin.codegen.ExpressionCodegen
-import org.jetbrains.kotlin.codegen.StackValue
-import org.jetbrains.kotlin.codegen.generateCallReceiver
-import org.jetbrains.kotlin.codegen.generateCallSingleArgument
+import org.jetbrains.kotlin.codegen.*
 import org.jetbrains.kotlin.descriptors.CallableDescriptor
 import org.jetbrains.kotlin.resolve.calls.model.ResolvedCall
 import org.jetbrains.org.objectweb.asm.Type
 import org.jetbrains.org.objectweb.asm.commons.InstructionAdapter
 
 class SimpleBoundedValue(
-        private val codegen: ExpressionCodegen,
-        private val rangeCall: ResolvedCall<out CallableDescriptor>,
+        codegen: ExpressionCodegen,
+        rangeCall: ResolvedCall<out CallableDescriptor>,
         private val lowBound: StackValue,
-        override val isLowInclusive: Boolean,
+        isLowInclusive: Boolean,
         private val highBound: StackValue,
-        override val isHighInclusive: Boolean
-): BoundedValue {
+        isHighInclusive: Boolean
+): AbstractBoundedValue(codegen, rangeCall, isLowInclusive, isHighInclusive) {
     constructor(
             codegen: ExpressionCodegen,
             rangeCall: ResolvedCall<out CallableDescriptor>,
@@ -54,18 +51,9 @@ class SimpleBoundedValue(
             highBound: StackValue
     ) : this(codegen, rangeCall, lowBound, true, highBound, true)
 
-    override val instanceType: Type = codegen.asmType(rangeCall.resultingDescriptor.returnType!!)
-
-    override fun putInstance(v: InstructionAdapter, type: Type) {
-        codegen.invokeFunction(rangeCall.call, rangeCall, StackValue.none()).put(type, v)
-    }
-
     override fun putHighLow(v: InstructionAdapter, type: Type) {
-        highBound.put(type, v)
         lowBound.put(type, v)
-    }
-
-    companion object {
-
+        highBound.put(type, v)
+        AsmUtil.swap(v, type, type)
     }
 }