Add support for a new extension to the .file directive:

  .file filenumber "directory" "filename"

This removes one join+split of the directory+filename in MC internals. Because
bitcode files have independent fields for directory and filenames in debug info,
this patch may change the .o files written by existing .bc files.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@142300 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/CodeGen/LLVMTargetMachine.cpp b/lib/CodeGen/LLVMTargetMachine.cpp
index 80ecc22..759610a 100644
--- a/lib/CodeGen/LLVMTargetMachine.cpp
+++ b/lib/CodeGen/LLVMTargetMachine.cpp
@@ -159,6 +159,7 @@
                                                   getVerboseAsm(),
                                                   hasMCUseLoc(),
                                                   hasMCUseCFI(),
+                                                  hasMCUseDwarfDirectory(),
                                                   InstPrinter,
                                                   MCE, MAB,
                                                   ShowMCInst);