[PATCH] Refactor lit.cfg to use lit.util.which

[Robinson, Paul]

Ping. LIT owner? not sure who.
--paulr

> -----Original Message-----
> From: llvm-commits-bounces at cs.uiuc.edu [mailto:llvm-commits-
> bounces at cs.uiuc.edu] On Behalf Of Robinson, Paul
> Sent: Tuesday, March 04, 2014 5:01 PM
> To: llvm-commits at cs.uiuc.edu commits (llvm-commits at cs.uiuc.edu)
> Subject: [PATCH] Refactor lit.cfg to use lit.util.which
> 
> llvm/test/lit.cfg was doing tool-name substitutions using PATHEXT
> and os.path.exists().  Better to use lit.util.which, as a centralized
> place that knows path-name quirks.
> As a side effect, it's easy to tell if a tool doesn't exist, so I
> removed some non-existent tools from the list.  (Possibly 'clang'
> should also be removed? It shouldn't be used for any LLVM tests...)
> 
> Okay to submit?
> Thanks,
> --paulr

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