[PATCH] [Tooling] Restore current directory after processing each file.

[Alexander Kornienko]

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Comment at: lib/Tooling/Tooling.cpp:312-315
@@ -307,2 +311,6 @@
 
+    // FIXME: getCompileCommands can change the state of the file system (e.g.
+    // prepare generated headers), so it needs to run right before we invoke the
+    // tool, as the next file may require a different (incompatible) state of
+    // the file system.
     std::vector<CompileCommand> CompileCommandsForFile =
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klimek wrote:
> I'd rephrase this to say what state we want to be in rather than what the current state is.
Done. See r221600.

http://reviews.llvm.org/D6162