From 7127b13342f25a1fa06ed2c6f81891d3613df3fd Mon Sep 17 00:00:00 2001
From: Duncan Sands <baldrick@free.fr>
Date: Wed, 4 Nov 2009 20:50:23 +0000
Subject: [PATCH] A value is only assigned to errno if NumRead equals -1, so do
 not reason based on errno if NumRead has a different value.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@86046 91177308-0d34-0410-b5e6-96231b3b80d8
---
 lib/Support/MemoryBuffer.cpp | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/lib/Support/MemoryBuffer.cpp b/lib/Support/MemoryBuffer.cpp
index d8b6b9f76fe..88e2050a9a9 100644
--- a/lib/Support/MemoryBuffer.cpp
+++ b/lib/Support/MemoryBuffer.cpp
@@ -229,7 +229,7 @@ MemoryBuffer *MemoryBuffer::getFile(const char *Filename, std::string *ErrStr,
     if (NumRead > 0) {
       BytesLeft -= NumRead;
       BufPtr += NumRead;
-    } else if (errno == EINTR) {
+    } else if (NumRead == -1 && errno == EINTR) {
       // try again
     } else {
       // error reading.