5 Commits

Author	SHA1	Message	Date
Chris Lattner	7f23958aa4	fix PR5262. ... git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@84810 91177308-0d34-0410-b5e6-96231b3b80d8	2009-10-22 00:17:26 +00:00
Torok Edwin	0739bd0ab2	Fix PR5262: when folding select into PHI, make sure all operands are available ... in the PHI's Basic Block. This uses a conservative approach, because we don't have dominator info in instcombine. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@84754 91177308-0d34-0410-b5e6-96231b3b80d8	2009-10-21 10:49:00 +00:00
Chris Lattner	4cb81bdd56	instcombine transforms vector loads that are only used by ... extractelement operations into a bitcast of the pointer, then a gep, then a scalar load. Disable this when the vector only has one element, because it leads to infinite loops in instcombine (PR4908). This transformation seems like a really bad idea to me, as it will likely disable CSE of vector load/stores etc and can be better done in the code generator when profitable. This goes all the way back to the first days of packed types, r25299 specifically. I'll let those people who care about the performance of vector code decide what to do with this. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@81185 91177308-0d34-0410-b5e6-96231b3b80d8	2009-09-08 03:44:51 +00:00
Chris Lattner	b9a4ddbbcd	fix ComputeMaskedBits handling of zext/sext/trunc to work with vectors. ... This fixes PR4905 git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@81174 91177308-0d34-0410-b5e6-96231b3b80d8	2009-09-08 00:13:52 +00:00
Chris Lattner	95afdfee82	fix a bug I introduced with my 'instcombine builder' refactoring ... changes: SimplifyDemandedBits can't use the builder yet because it has the wrong insertion point. This fixes a crash building MultiSource/Benchmarks/PAQ8p git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@80537 91177308-0d34-0410-b5e6-96231b3b80d8	2009-08-31 04:36:22 +00:00