PATCH: TableGen: Report an error when defining more than 32 subreg indices

[Malul, Elior]

Although I'm hardly the gate-keeper of tblgen,
I think it would be a good idea to add LIT a test that exposes the bug you fix.
Other than that, LGTM. 

-----Original Message-----
From: llvm-commits-bounces at cs.uiuc.edu [mailto:llvm-commits-bounces at cs.uiuc.edu] On Behalf Of Tom Stellard
Sent: Thursday, January 31, 2013 16:23
To: llvm-commits at cs.uiuc.edu
Subject: PATCH: TableGen: Report an error when defining more than 32 subreg indices

Hi,

The maximum number of sub reg indices is limited to 32 by use of the LaneMask.  TableGen currently assigns all sub reg indices after the first 32 to the same LaneMask, which leads to bugs in the register allocator.  This patch prevents the user from defining more than 32 sub reg indices.

-Tom
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