ThinLTOCodeGenerator: handle std::error_code instead of silently dropping it.

From: Mehdi Amini <mehdi.amini@apple.com>
llvm-svn: 269541

1 files changed, 5 insertions, 1 deletions

diff --git a/llvm/lib/LTO/ThinLTOCodeGenerator.cpp b/llvm/lib/LTO/ThinLTOCodeGenerator.cpp
index 93a3f3e84ad..b57166d65ab 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);
+    }
   }
 };