From 0558fb60f996b14a826e70170781b5afcde5f5bf Mon Sep 17 00:00:00 2001
From: Christopher Dykes <cdykes@fb.com>
Date: Mon, 23 May 2016 17:30:29 -0700
Subject: [PATCH] Support folly::assume under MSVC

Summary: Actually __assume when we assume.

Reviewed By: meyering

Differential Revision: D3336033

fbshipit-source-id: 6c931e9f832dd1d861d03e3ad8e308f612522401
---
 folly/Assume.h | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/folly/Assume.h b/folly/Assume.h
index 7c50a679..8f807433 100644
--- a/folly/Assume.h
+++ b/folly/Assume.h
@@ -38,6 +38,8 @@ FOLLY_ALWAYS_INLINE void assume(bool cond) {
   __builtin_assume(cond);
 #elif defined(__GNUC__)
   if (!cond) { __builtin_unreachable(); }
+#elif defined(_MSC_VER)
+  __assume(cond);
 #else
   // Do nothing.
 #endif
-- 
2.34.1