From 8649fc053be167bfdf93e19c40fc9f78b3d5ebfa Mon Sep 17 00:00:00 2001
From: Eli Friedman <efriedma@codeaurora.org>
Date: Mon, 7 Nov 2016 23:43:07 +0000
Subject: [PATCH] [LTO] Add error message on IO error in
 compileOptimizedToFile.

(No testcase because it's difficult to force an error here.)

Differential Revision: https://reviews.llvm.org/D26371

llvm-svn: 286177
---
 llvm/lib/LTO/LTOCodeGenerator.cpp | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/llvm/lib/LTO/LTOCodeGenerator.cpp b/llvm/lib/LTO/LTOCodeGenerator.cpp
index 98ce550..ab4f968 100644
--- a/llvm/lib/LTO/LTOCodeGenerator.cpp
+++ b/llvm/lib/LTO/LTOCodeGenerator.cpp
@@ -257,6 +257,8 @@ bool LTOCodeGenerator::compileOptimizedToFile(const char **Name) {
   bool genResult = compileOptimized(&objFile.os());
   objFile.os().close();
   if (objFile.os().has_error()) {
+    Twine ErrMsg = "could not write object file: " + Filename.str();
+    emitError(ErrMsg.str());
     objFile.os().clear_error();
     sys::fs::remove(Twine(Filename));
     return false;
-- 
2.7.4