From a27478e54f5fa99ed17ad6ef149046f9d391f293 Mon Sep 17 00:00:00 2001
From: Ben Dunbobbin <Ben.Dunbobbin@sony.com>
Date: Wed, 1 Jul 2020 17:49:30 +0100
Subject: [PATCH] [Support][Windows] Prevent 2s delay when renaming a file that
 does not exist

Differential Revision: https://reviews.llvm.org/D82542
---
 llvm/lib/Support/Windows/Path.inc | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/llvm/lib/Support/Windows/Path.inc b/llvm/lib/Support/Windows/Path.inc
index ec62e65..96677e2 100644
--- a/llvm/lib/Support/Windows/Path.inc
+++ b/llvm/lib/Support/Windows/Path.inc
@@ -555,6 +555,11 @@ std::error_code rename(const Twine &From, const Twine &To) {
                       NULL, OPEN_EXISTING, FILE_ATTRIBUTE_NORMAL, NULL);
     if (FromHandle)
       break;
+
+    // We don't want to loop if the file doesn't exist.
+    auto EC = mapWindowsError(GetLastError());
+    if (EC == errc::no_such_file_or_directory)
+      return EC;
   }
   if (!FromHandle)
     return mapWindowsError(GetLastError());
-- 
2.7.4