From 64c16ded9b79e3b64edde35891dd77418d00b102 Mon Sep 17 00:00:00 2001
From: Rory Shu <qianyishu@fb.com>
Date: Thu, 27 Jun 2024 04:20:49 -0700
Subject: [PATCH] test fix

---
 libredex/StlUtil.h | 20 +++++++++++++++++---
 1 file changed, 17 insertions(+), 3 deletions(-)

diff --git a/libredex/StlUtil.h b/libredex/StlUtil.h
index cc809c94679..52b0f890ea9 100644
--- a/libredex/StlUtil.h
+++ b/libredex/StlUtil.h
@@ -8,6 +8,7 @@
 #pragma once
 
 #include <algorithm>
+#include <cstring>
 #include <deque>
 #include <vector>
 
@@ -45,9 +46,22 @@ size_t erase_if(Container& c, const Pred& pred) {
   return removed;
 }
 
-template <typename To, typename From>
-constexpr To bit_cast(const From& from) noexcept {
-  return __builtin_bit_cast(To, from);
+template<class To, class From>
+std::enable_if_t<
+    sizeof(To) == sizeof(From) &&
+    std::is_trivially_copyable_v<From> &&
+    std::is_trivially_copyable_v<To>,
+    To>
+// constexpr support needs compiler magic
+bit_cast(const From& src) noexcept
+{
+    static_assert(std::is_trivially_constructible_v<To>,
+        "This implementation additionally requires "
+        "destination type to be trivially constructible");
+
+    To dst;
+    std::memcpy(&dst, &src, sizeof(To));
+    return dst;
 }
 
 } // namespace std20