llvm/lib/Transforms/Utils, branch release_30

Add a natural stack alignment field to TargetData, and prevent InstCombine from

2011-10-10T23:42:08Z

promoting allocas to preferred alignments that exceed the natural alignment. This avoids some potentially expensive dynamic stack realignments. The natural stack alignment is set in target data strings via the "S" option. Size is in bits and must be a multiple of 8. The natural stack alignment defaults to "unspecified" (represented by a zero value), and the "unspecified" value does not prevent any alignment promotions. Target maintainers that care about avoiding promotions should explicitly add the "S" option to their target data strings. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@141599 91177308-0d34-0410-b5e6-96231b3b80d8

LSR should avoid redundant edge splitting.

2011-10-04T03:50:44Z

This handles the case in which LSR rewrites an IV user that is a phi and splits critical edges originating from a switch. Fixes LSR is not splitting edges "nicely" git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@141059 91177308-0d34-0410-b5e6-96231b3b80d8

whitespace

2011-10-04T03:34:49Z

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@141058 91177308-0d34-0410-b5e6-96231b3b80d8

Enhance a couple places where we were doing constant folding of instructions,

2011-10-02T09:12:55Z

but not load instructions. Noticed by inspection. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@140966 91177308-0d34-0410-b5e6-96231b3b80d8

Clean up uses of switch instructions so they are not dependent on the operand ordering. Patch by Stepan Dyatkovskiy.

2011-09-29T20:21:17Z

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@140803 91177308-0d34-0410-b5e6-96231b3b80d8

Stop emitting instructions with the name "tmp" they eat up memory and have to be uniqued, without any benefit.

2011-09-27T20:39:19Z

If someone prefers %tmp42 to %42, run instnamer. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@140634 91177308-0d34-0410-b5e6-96231b3b80d8

Relax this condition.

2011-09-20T22:28:17Z

Some passes require breaking critical edges before they're called. Don't segfault because of that. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@140196 91177308-0d34-0410-b5e6-96231b3b80d8

Use ArrayRef instead of an explicit 'const std::vector &'.

2011-09-20T19:05:04Z

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@140172 91177308-0d34-0410-b5e6-96231b3b80d8

Use ArrayRef instead of 'const std::vector' to pass around the list of basic blocks to extract.

2011-09-20T18:42:07Z

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@140168 91177308-0d34-0410-b5e6-96231b3b80d8

Fix comments.

2011-09-20T18:24:46Z

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@140164 91177308-0d34-0410-b5e6-96231b3b80d8