From: Michael J. Spencer <bigcheesegs@gmail.com>
Date: Wed, 21 Mar 2012 23:09:14 +0000 (+0000)
Subject: [PathV2]: Fix bug in create_directories which caused infinite recursion on
X-Git-Url: http://plrg.eecs.uci.edu/git/?a=commitdiff_plain;h=55f43d6b7e3ad1f08f5392205ab0feabf4c9933d;p=oota-llvm.git

[PathV2]: Fix bug in create_directories which caused infinite recursion on
som inputs.

Bug found and fix proposed by Kal Conley!

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@153225 91177308-0d34-0410-b5e6-96231b3b80d8
---

diff --git a/lib/Support/PathV2.cpp b/lib/Support/PathV2.cpp
index 786e1a12c30..e2a69a650db 100644
--- a/lib/Support/PathV2.cpp
+++ b/lib/Support/PathV2.cpp
@@ -654,12 +654,13 @@ error_code create_directories(const Twine &path, bool &existed) {
   StringRef p = path.toStringRef(path_storage);
 
   StringRef parent = path::parent_path(p);
-  bool parent_exists;
+  if (!parent.empty()) {
+    bool parent_exists;
+    if (error_code ec = fs::exists(parent, parent_exists)) return ec;
 
-  if (error_code ec = fs::exists(parent, parent_exists)) return ec;
-
-  if (!parent_exists)
-    if (error_code ec = create_directories(parent, existed)) return ec;
+    if (!parent_exists)
+      if (error_code ec = create_directories(parent, existed)) return ec;
+  }
 
   return create_directory(p, existed);
 }