[llvm-commits] [Patch] Don't do switch-to-lookup table unless TTI is present

[Hans Wennborg]

Hi all,

Currently, SimplifyCFG does the switch-to-lookup table transformation
unless there is TargetTransformInfo that disables it.

Andrew pointed out [1] that this might not be desirable.

The attached patch makes the transformation only run when there is TTI
present that enables it.

Please take a look!

 - Hans

[1]. http://lists.cs.uiuc.edu/pipermail/llvm-commits/Week-of-Mon-20121105/155311.html
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