llvm/test/Transforms/CodeGenPrepare, branch release_31

Replace all instances of dg.exp file with lit.local.cfg, since all tests are run with LIT now and now Dejagnu. dg.exp is no longer needed.

2012-02-16T06:28:33Z

Patch reviewed by Daniel Dunbar. It will be followed by additional cleanup patches. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@150664 91177308-0d34-0410-b5e6-96231b3b80d8

Roll r127459 back in:

2011-03-11T21:52:04Z

Optimize trivial branches in CodeGenPrepare, which often get created from the lowering of objectsize intrinsics. Unfortunately, a number of tests were relying on llc not optimizing trivial branches, so I had to add an option to allow them to continue to test what they originally tested. This fixes and . git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@127498 91177308-0d34-0410-b5e6-96231b3b80d8

Revert r127459, "Optimize trivial branches in CodeGenPrepare, which often get

2011-03-11T19:30:30Z

created from the", it broke some GCC test suite tests. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@127477 91177308-0d34-0410-b5e6-96231b3b80d8

Optimize trivial branches in CodeGenPrepare, which often get created from the

2011-03-11T04:54:27Z

lowering of objectsize intrinsics. Unfortunately, a number of tests were relying on llc not optimizing trivial branches, so I had to add an option to allow them to continue to test what they originally tested. This fixes and . git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@127459 91177308-0d34-0410-b5e6-96231b3b80d8

temporarily revert r123526. While working on a follow-on patch I

2011-01-15T07:51:19Z

realize that ConstantFoldTerminator doesn't preserve dominfo. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@123527 91177308-0d34-0410-b5e6-96231b3b80d8

fix rdar://8785296 - -fcatch-undefined-behavior generates inefficient code

2011-01-15T07:36:13Z

The basic issue is that isel (very reasonably!) expects conditional branches to be folded, so CGP leaving around a bunch dead computation feeding conditional branches isn't such a good idea. Just fold branches on constants into unconditional branches. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@123526 91177308-0d34-0410-b5e6-96231b3b80d8

Now that instruction optzns can update the iterator as they go, we can

2011-01-15T07:25:29Z

have objectsize folding recursively simplify away their result when it folds. It is important to catch this here, because otherwise we won't eliminate the cross-block values at isel and other times. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@123524 91177308-0d34-0410-b5e6-96231b3b80d8

revert r122164, I'm going to go with a different approach.

2010-12-19T04:23:03Z

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@122168 91177308-0d34-0410-b5e6-96231b3b80d8

first step to fixing PR8642: don't fold away empty basic blocks

2010-12-19T03:02:34Z

which have trapping constant exprs in them due to PHI nodes. Eliminating them can cause the constant expr to be evalutated on new paths if the input edges are critical. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@122164 91177308-0d34-0410-b5e6-96231b3b80d8

move this test into the ARM test so that it is only run when the arm backend

2010-12-19T02:58:14Z

is enabled. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@122163 91177308-0d34-0410-b5e6-96231b3b80d8