llvm/test/Transforms, branch release_23

Implement PR2298. This transforms:

2008-05-09T05:19:28Z

~x < ~y --> y < x -x == -y --> x == y git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@50882 91177308-0d34-0410-b5e6-96231b3b80d8

Make instcombine's DSE respect loads as well as stores. It is not safe to

2008-05-08T17:20:30Z

delete the first store in: store x -> p load p store y -> p This is for PR2297. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@50859 91177308-0d34-0410-b5e6-96231b3b80d8

Fix a bug in the ComputeMaskedBits logic for multiply.

2008-05-07T00:35:55Z

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@50793 91177308-0d34-0410-b5e6-96231b3b80d8

Testcase for r50770.

2008-05-06T21:01:34Z

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@50771 91177308-0d34-0410-b5e6-96231b3b80d8

Correct the value of LowBits in srem and urem handling in

2008-05-06T00:51:48Z

ComputeMaskedBits. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@50692 91177308-0d34-0410-b5e6-96231b3b80d8

Fix a crash when threading a block that includes a MRV call result.

2008-05-05T20:21:22Z

DemoteRegToStack doesn't work with MRVs yet, because it relies on the ability to load/store things. This fixes PR2285. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@50667 91177308-0d34-0410-b5e6-96231b3b80d8

Fix a mistake in the computation of leading zeros for udiv.

2008-05-02T21:30:02Z

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@50591 91177308-0d34-0410-b5e6-96231b3b80d8

strength reduce exp2 into ldexp, rdar://5852514

2008-05-02T18:43:35Z

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@50586 91177308-0d34-0410-b5e6-96231b3b80d8

Update old-style syntax in some "not grep" tests.

2008-05-01T23:50:07Z

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@50560 91177308-0d34-0410-b5e6-96231b3b80d8