Commit Graph

3 Commits

Author SHA1 Message Date
Chris Lattner 2e01a69e72 Remove unneeded code I added.
llvm-svn: 51878
2008-06-02 18:39:07 +00:00
Chris Lattner a12a6de683 move CannotBeNegativeZero to ValueTracking. Simplify some signbit comparisons.
llvm-svn: 51864
2008-06-02 01:29:46 +00:00
Chris Lattner 965c769b3c move ComputeMaskedBits, MaskedValueIsZero, and ComputeNumSignBits
out of instcombine into a new file in libanalysis.  This also teaches
ComputeNumSignBits about the number of sign bits in a constantint.

llvm-svn: 51863
2008-06-02 01:18:21 +00:00