JVM KT-47613 traverse nodes backwards in backward analysis

compiler/backend/src/org/jetbrains/kotlin/codegen/optimization/common/backwardAnalysis.kt

@@ -38,13 +38,12 @@ fun <F : VarFrame<F>> analyze(node: MethodNode, interpreter: BackwardAnalysisInt
     val frames = (1..insnList.size()).map { interpreter.newFrame(node.maxLocals) }.toMutableList()
     val insnArray = insnList.toArray()
 
-    // see Figure 9.16 from Dragon book
     var wereChanges: Boolean
 
     do {
         wereChanges = false
-        for (insn in insnArray) {
-            val index = insnList.indexOf(insn)
+        for (index in insnArray.indices.reversed()) {
+            val insn = insnArray[index]
             val newFrame = interpreter.newFrame(node.maxLocals)
             for (successorIndex in graph.getSuccessorsIndices(insn)) {
                 newFrame.mergeFrom(frames[successorIndex])