Fix llvm::sys::path::remove_dots() to return "." instead of an empty path.

Differential Revision: https://reviews.llvm.org/D46887

llvm-svn: 332508

1 files changed, 4 insertions, 0 deletions

diff --git a/llvm/lib/Support/Path.cpp b/llvm/lib/Support/Path.cpp
index ff41dd47c42..dfe9f470bab 100644
--- a/llvm/lib/Support/Path.cpp
+++ b/llvm/lib/Support/Path.cpp
@@ -726,6 +726,10 @@ static SmallString<256> remove_dots(StringRef path, bool remove_dot_dot,
   SmallString<256> buffer = path::root_path(path, style);
   for (StringRef C : components)
     path::append(buffer, style, C);
+  // If the buffer is empty, then return ".". Many other path utilities
+  // do this so it seems to be an expected result.
+  if (buffer.empty())
+    buffer.append(1, '.');
   return buffer;
 }