4 Commits

Author	SHA1	Message	Date
Chris Lattner	8609fda0f7	fix some problems handling large vectors reported in PR6230 ... git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@95616 91177308-0d34-0410-b5e6-96231b3b80d8	2010-02-08 23:56:03 +00:00
Duncan Sands	ac512171ff	Having RHSKnownZero and RHSKnownOne be alternative names for KnownZero and KnownOne ... (via APInt &RHSKnownZero = KnownZero, etc) seems dangerous and confusing to me: it is easy not to notice this, and then wonder why KnownZero/RHSKnownZero changed underneath you when you modified RHSKnownZero/KnownZero etc. So get rid of this. No intended functionality change (tested with "make check" + llvm-gcc bootstrap). git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@94802 91177308-0d34-0410-b5e6-96231b3b80d8	2010-01-29 06:18:46 +00:00
Duncan Sands	2c47368a7d	Fix PR6165. The bug was that LHSKnownZero was being and'd with DemandedMask ... when it should have been and'd with LowBits. Fix that and while there beef up the logic in the case of a negative LHS. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@94745 91177308-0d34-0410-b5e6-96231b3b80d8	2010-01-28 17:22:42 +00:00
Chris Lattner	e0b4b721aa	move the 'SimplifyDemandedFoo' methods out to their own file, cutting 1K lines out of instcombine.cpp ... git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@92465 91177308-0d34-0410-b5e6-96231b3b80d8	2010-01-04 07:17:19 +00:00