From 2a16a5fae578ffd07a17ea6889d96bc8b9587670 Mon Sep 17 00:00:00 2001
From: Mehdi Amini <mehdi.amini@apple.com>
Date: Sat, 14 May 2016 04:58:38 +0000
Subject: [PATCH] ThinLTOCodeGenerator: handle std::error_code instead of
 silently dropping it.

From: Mehdi Amini <mehdi.amini@apple.com>
llvm-svn: 269541
---
 llvm/lib/LTO/ThinLTOCodeGenerator.cpp | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/llvm/lib/LTO/ThinLTOCodeGenerator.cpp b/llvm/lib/LTO/ThinLTOCodeGenerator.cpp
index 93a3f3e84ad0..b57166d65abe 100644
--- a/llvm/lib/LTO/ThinLTOCodeGenerator.cpp
+++ b/llvm/lib/LTO/ThinLTOCodeGenerator.cpp
@@ -502,7 +502,11 @@ public:
       OS << OutputBuffer.getBuffer();
     }
     // Rename to final destination (hopefully race condition won't matter here)
-    sys::fs::rename(TempFilename, EntryPath);
+    EC = sys::fs::rename(TempFilename, EntryPath);
+    if (EC) {
+      errs() << "Error: " << EC.message() << "\n";
+      report_fatal_error("ThinLTO: Can't rename temporary file " + TempFilename + " to " + EntryPath);
+    }
   }
 };