commit adad33011f3f5511e5959362fc33003e1e378eb6
author Zachary Turner <zturner@google.com> Thu Mar 08 20:34:47 2018 +0000
committer Zachary Turner <zturner@google.com> Thu Mar 08 20:34:47 2018 +0000
tree e27f8cb286ddea20f07e6d589f2a8e55c72f0eec
parent 373c38a2db3787b60a5d2588922e8b8eac389d17

[Support] Add WriteThroughMemoryBuffer.

This is like MemoryBuffer (read-only) and WritableMemoryBuffer
(writable private), but where the underlying file can be modified
after writing.  This is useful when you want to open a file, make
some targeted edits, and then write it back out.

Differential Revision: https://reviews.llvm.org/D44230

llvm-svn: 327057

llvm/lib/Support/Unix/Path.inc

diff --git a/llvm/lib/Support/Unix/Path.inc b/llvm/lib/Support/Unix/Path.inc
index 088774a..1d5e56d 100644
--- a/llvm/lib/Support/Unix/Path.inc
+++ b/llvm/lib/Support/Unix/Path.inc
@@ -792,7 +792,7 @@
 
   if (Flags & F_Append)
     OpenFlags |= O_APPEND;
-  else
+  else if (!(Flags & F_NoTrunc))
     OpenFlags |= O_TRUNC;
 
   if (Flags & F_Excl)