[PATCH] Remove a gross usage of environment variables in MachineVerifier, replacing it with support for setting the -verify-machineinstrs flag via an environment variable in LIT.

[Chandler Carruth]

This looks great. Minor nit below, but submit whenever.


REPOSITORY
  rL LLVM

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Comment at: lib/CodeGen/MachineVerifier.cpp:66
@@ -65,4 +65,3 @@
     const char *Banner;
-    const char *const OutFileName;
     raw_ostream *OS;
     const MachineFunction *MF;
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>From the other review, make this a reference? (Maybe that doesn't work with some other constructor.

http://reviews.llvm.org/D7382

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