SnippetFrameStateAssignment

```
public class SnippetFrameStateAssignment
extends Object
```
Utility class for snippet lowering. Certain nodes in Graal IR can be lowered to a (sub) graph of nodes by a process called snippet lowering. For details see Snippet. For example, a snippet lowering can create a merge node without a frame state. Any deoptimization point dominated by this merge will be missing frame state information since we cannot decide which frame state to use for the deoptimization point. See GraphUtil.mayRemoveSplit(org.graalvm.compiler.nodes.IfNode) for more details. The same applies for loop exit nodes. This utility determines which frame state can be assigned to each node in a snippet graph. During lowering a node is replaced with the snippet which means there are only 2 possible states that can be used inside the snippet graph: the before frame state of the snippet lowered node and the after state. Generally, if a side-effect is happening inside a snippet all code after that particular side-effect must not deopt to the before state but only to the after state. All code before the side-effect is allowed to use the before state

Nested Classes
Modifier and Type	Class and Description
`static class`	`SnippetFrameStateAssignment.NodeStateAssignment` Possible states to be used inside a snippet.
`static class`	`SnippetFrameStateAssignment.SnippetFrameStateAssignmentClosure` The iterator below visits a compiler graph in reverse post order and, based on the side-effecting nodes, decides which state can be used after snippet lowering for a merge or loop exit node.

Constructors
Constructor and Description
`SnippetFrameStateAssignment()`

Method Summary
- Methods inherited from class java.lang.Object
  clone, equals, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

- Constructor Detail
  - SnippetFrameStateAssignment
```
public SnippetFrameStateAssignment()
```

Class SnippetFrameStateAssignment