From c5f300de0453a91263425f179e85481eba2379fa Mon Sep 17 00:00:00 2001
From: Dominic Gannaway <dg@domgan.com>
Date: Sat, 14 Jul 2018 10:41:26 -0700
Subject: [PATCH] Re-enable traverse cache clear (#2260)

Summary:
Release notes: none

Follow up to https://github.com/facebook/prepack/pull/2256. This re-enables Babel traverse cache clearing, but with the Babel 7 API.
Pull Request resolved: https://github.com/facebook/prepack/pull/2260

Differential Revision: D8850784

Pulled By: trueadm

fbshipit-source-id: 9d61feff152400262a050d72b9ee3567ddcf11e2
---
 src/evaluators/ForStatement.js        | 3 +--
 src/react/utils.js                    | 3 +--
 src/serializer/ResidualHeapVisitor.js | 3 +--
 src/utils/flow.js                     | 3 +--
 src/utils/havoc.js                    | 3 +--
 5 files changed, 5 insertions(+), 10 deletions(-)

diff --git a/src/evaluators/ForStatement.js b/src/evaluators/ForStatement.js
index 87f3c4071..f1b4a8e52 100644
--- a/src/evaluators/ForStatement.js
+++ b/src/evaluators/ForStatement.js
@@ -422,8 +422,7 @@ function generateRuntimeForStatement(
     null,
     functionInfo
   );
-  // Babel 7 removed clearCache
-  // traverse.clearCache();
+  traverse.cache.clear();
   let { usesReturn, usesThrow, usesArguments, usesGotoToLabel, varPatternUnsupported, usesThis } = functionInfo;
 
   if (usesReturn || usesThrow || usesArguments || usesGotoToLabel || varPatternUnsupported) {
diff --git a/src/react/utils.js b/src/react/utils.js
index 5bd00d693..1272c46e1 100644
--- a/src/react/utils.js
+++ b/src/react/utils.js
@@ -339,8 +339,7 @@ export function convertSimpleClassComponentToFunctionalComponent(
       {},
       undefined
     );
-    // Babel 7 removed clearCache
-    // traverse.clearCache();
+    traverse.cache.clear();
   });
 }
 
diff --git a/src/serializer/ResidualHeapVisitor.js b/src/serializer/ResidualHeapVisitor.js
index a6b095fac..0fa0bc579 100644
--- a/src/serializer/ResidualHeapVisitor.js
+++ b/src/serializer/ResidualHeapVisitor.js
@@ -566,8 +566,7 @@ export class ResidualHeapVisitor {
         null,
         state
       );
-      // Babel 7 removed clearCache
-      // traverse.clearCache();
+      traverse.cache.clear();
       this.functionInfos.set(code, functionInfo);
 
       if (val.isResidual && functionInfo.unbound.size) {
diff --git a/src/utils/flow.js b/src/utils/flow.js
index e36dd13bf..152952b96 100644
--- a/src/utils/flow.js
+++ b/src/utils/flow.js
@@ -75,6 +75,5 @@ export function stripFlowTypeAnnotations(ast: BabelNode): void {
     {},
     undefined
   );
-  // Babel 7 removed clearCache
-  // traverse.clearCache();
+  traverse.cache.clear();
 }
diff --git a/src/utils/havoc.js b/src/utils/havoc.js
index bc247247b..9bbe4b440 100644
--- a/src/utils/havoc.js
+++ b/src/utils/havoc.js
@@ -107,8 +107,7 @@ function getHavocedFunctionInfo(value: FunctionValue) {
     null,
     functionInfo
   );
-  // Babel 7 removed clearCache
-  // traverse.clearCache();
+  traverse.cache.clear();
   return functionInfo;
 }