From fbe7bc21b9aa00afa230132b3f7eee6d2b5c94a7 Mon Sep 17 00:00:00 2001
From: mofeiZ <34200447+mofeiZ@users.noreply.github.com>
Date: Thu, 8 May 2025 11:18:16 -0400
Subject: [PATCH] [compiler][be] repro edge cases for noEmit and module
 opt-outs (#33144)

see test fixtures
---
[//]: # (BEGIN SAPLING FOOTER)
Stack created with [Sapling](https://sapling-scm.com). Best reviewed
with [ReviewStack](https://reviewstack.dev/facebook/react/pull/33144).
* #33146
* #33145
* __->__ #33144
---
 ...bailout-nopanic-shouldnt-outline.expect.md | 30 ++++++++++++
 .../repro-bailout-nopanic-shouldnt-outline.js |  6 +++
 .../compiler/use-memo-noemit.expect.md        | 48 +++++++++++++++++++
 .../fixtures/compiler/use-memo-noemit.js      | 11 +++++
 4 files changed, 95 insertions(+)
 create mode 100644 compiler/packages/babel-plugin-react-compiler/src/__tests__/fixtures/compiler/repro-bailout-nopanic-shouldnt-outline.expect.md
 create mode 100644 compiler/packages/babel-plugin-react-compiler/src/__tests__/fixtures/compiler/repro-bailout-nopanic-shouldnt-outline.js
 create mode 100644 compiler/packages/babel-plugin-react-compiler/src/__tests__/fixtures/compiler/use-memo-noemit.expect.md
 create mode 100644 compiler/packages/babel-plugin-react-compiler/src/__tests__/fixtures/compiler/use-memo-noemit.js

diff --git a/compiler/packages/babel-plugin-react-compiler/src/__tests__/fixtures/compiler/repro-bailout-nopanic-shouldnt-outline.expect.md b/compiler/packages/babel-plugin-react-compiler/src/__tests__/fixtures/compiler/repro-bailout-nopanic-shouldnt-outline.expect.md
new file mode 100644
index 0000000000..f24d949205
--- /dev/null
+++ b/compiler/packages/babel-plugin-react-compiler/src/__tests__/fixtures/compiler/repro-bailout-nopanic-shouldnt-outline.expect.md
@@ -0,0 +1,30 @@
+
+## Input
+
+```javascript
+// @panicThreshold(none)
+'use no memo';
+
+function Foo() {
+  return <button onClick={() => alert('hello!')}>Click me!</button>;
+}
+
+```
+
+## Code
+
+```javascript
+// @panicThreshold(none)
+"use no memo";
+
+function Foo() {
+  return <button onClick={() => alert("hello!")}>Click me!</button>;
+}
+function _temp() {
+  return alert("hello!");
+}
+
+```
+      
+### Eval output
+(kind: exception) Fixture not implemented
\ No newline at end of file
diff --git a/compiler/packages/babel-plugin-react-compiler/src/__tests__/fixtures/compiler/repro-bailout-nopanic-shouldnt-outline.js b/compiler/packages/babel-plugin-react-compiler/src/__tests__/fixtures/compiler/repro-bailout-nopanic-shouldnt-outline.js
new file mode 100644
index 0000000000..405295ee4c
--- /dev/null
+++ b/compiler/packages/babel-plugin-react-compiler/src/__tests__/fixtures/compiler/repro-bailout-nopanic-shouldnt-outline.js
@@ -0,0 +1,6 @@
+// @panicThreshold(none)
+'use no memo';
+
+function Foo() {
+  return <button onClick={() => alert('hello!')}>Click me!</button>;
+}
diff --git a/compiler/packages/babel-plugin-react-compiler/src/__tests__/fixtures/compiler/use-memo-noemit.expect.md b/compiler/packages/babel-plugin-react-compiler/src/__tests__/fixtures/compiler/use-memo-noemit.expect.md
new file mode 100644
index 0000000000..dfc831555f
--- /dev/null
+++ b/compiler/packages/babel-plugin-react-compiler/src/__tests__/fixtures/compiler/use-memo-noemit.expect.md
@@ -0,0 +1,48 @@
+
+## Input
+
+```javascript
+// @noEmit
+
+function Foo() {
+  'use memo';
+  return <button onClick={() => alert('hello!')}>Click me!</button>;
+}
+
+export const FIXTURE_ENTRYPOINT = {
+  fn: Foo,
+  params: [],
+};
+
+```
+
+## Code
+
+```javascript
+import { c as _c } from "react/compiler-runtime"; // @noEmit
+
+function Foo() {
+  "use memo";
+  const $ = _c(1);
+  let t0;
+  if ($[0] === Symbol.for("react.memo_cache_sentinel")) {
+    t0 = <button onClick={_temp}>Click me!</button>;
+    $[0] = t0;
+  } else {
+    t0 = $[0];
+  }
+  return t0;
+}
+function _temp() {
+  return alert("hello!");
+}
+
+export const FIXTURE_ENTRYPOINT = {
+  fn: Foo,
+  params: [],
+};
+
+```
+      
+### Eval output
+(kind: ok) <button>Click me!</button>
\ No newline at end of file
diff --git a/compiler/packages/babel-plugin-react-compiler/src/__tests__/fixtures/compiler/use-memo-noemit.js b/compiler/packages/babel-plugin-react-compiler/src/__tests__/fixtures/compiler/use-memo-noemit.js
new file mode 100644
index 0000000000..04ec880761
--- /dev/null
+++ b/compiler/packages/babel-plugin-react-compiler/src/__tests__/fixtures/compiler/use-memo-noemit.js
@@ -0,0 +1,11 @@
+// @noEmit
+
+function Foo() {
+  'use memo';
+  return <button onClick={() => alert('hello!')}>Click me!</button>;
+}
+
+export const FIXTURE_ENTRYPOINT = {
+  fn: Foo,
+  params: [],
+};