compiler: super early exploration of instruction reordering

See comments in InstructionReordering.ts. This needs substantial iteration before landing in some form, just putting up to share for discussion.

ghstack-source-id: 153eca4485d6f19e71423547af806f7b4aca8bc7
Pull Request resolved: #29579

Author: josephsavona

Diff for: compiler/packages/babel-plugin-react-compiler/src/Entrypoint/Pipeline.ts

@@ -41,6 +41,7 @@ import {
   deadCodeElimination,
   pruneMaybeThrows,
 } from "../Optimization";
+import { instructionReordering } from "../Optimization/InstructionReordering";
 import {
   CodegenFunction,
   alignObjectMethodScopes,
@@ -195,6 +196,9 @@ function* runWithEnvironment(
   deadCodeElimination(hir);
   yield log({ kind: "hir", name: "DeadCodeElimination", value: hir });
 
+  instructionReordering(hir);
+  yield log({ kind: "hir", name: "InstructionReordering", value: hir });
+
   pruneMaybeThrows(hir);
   yield log({ kind: "hir", name: "PruneMaybeThrows", value: hir });
 

Diff for: compiler/packages/babel-plugin-react-compiler/src/Inference/InferReferenceEffects.ts

@@ -737,6 +737,12 @@ class InferenceState {
    * For debugging purposes, dumps the state to a plain
    * object so that it can printed as JSON.
    */
+  inspect(): any {
+    return {
+      values: this.#values,
+      variables: this.#variables,
+    };
+  }
   debug(): any {
     const result: any = { values: {}, variables: {} };
     const objects: Map<InstructionValue, number> = new Map();