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* Use MachineBranchProbabilityInfo in If-Conversion instead of its own heuristics.Jakub Staszak2011-08-03
| | | | git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@136826 91177308-0d34-0410-b5e6-96231b3b80d8
* Make tBX_RET and tBX_RET_vararg predicable.Jim Grosbach2011-07-08
| | | | | | | | | | | The normal tBX instruction is predicable, so there's no reason the pseudos for using it as a return shouldn't be. Gives us some nice code-gen improvements as can be seen by the test changes. In particular, several tests now have to disable if-conversion because it works too well and defeats the test. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@134746 91177308-0d34-0410-b5e6-96231b3b80d8
* Thumb1 register to register MOV instruction is predicable.Jim Grosbach2011-06-30
| | | | | | | | | | Fix a FIXME and allow predication (in Thumb2) for the T1 register to register MOV instructions. This allows some better codegen with if-conversion (as seen in the test updates), plus it lays the groundwork for pseudo-izing the tMOVCC instructions. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@134197 91177308-0d34-0410-b5e6-96231b3b80d8
* Remove tail call. A tail call version will follow.Dale Johannesen2010-06-04
| | | | git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@105438 91177308-0d34-0410-b5e6-96231b3b80d8
* Reapply the new LoopStrengthReduction code, with compile time andDan Gohman2010-02-12
| | | | | | | | | | | bug fixes, and with improved heuristics for analyzing foreign-loop addrecs. This change also flattens IVUsers, eliminating the stride-oriented groupings, which makes it easier to work with. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@95975 91177308-0d34-0410-b5e6-96231b3b80d8
* Revert LoopStrengthReduce.cpp to pre-r94061 for now.Dan Gohman2010-01-22
| | | | git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@94123 91177308-0d34-0410-b5e6-96231b3b80d8
* Re-implement the main strength-reduction portion of LoopStrengthReduction.Dan Gohman2010-01-21
| | | | | | | | | | | | | | | This new version is much more aggressive about doing "full" reduction in cases where it reduces register pressure, and also more aggressive about rewriting induction variables to count down (or up) to zero when doing so reduces register pressure. It currently uses fairly simplistic algorithms for finding reuse opportunities, but it introduces a new framework allows it to combine multiple strategies at once to form hybrid solutions, instead of doing all full-reduction or all base+index. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@94061 91177308-0d34-0410-b5e6-96231b3b80d8
* Revert 89562. We're being sneakier than I was giving us credit for, and thisJim Grosbach2009-11-21
| | | | | | | | isn't necessary. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@89568 91177308-0d34-0410-b5e6-96231b3b80d8
* Darwin requires a frame pointer for all non-leaf functions to support correctJim Grosbach2009-11-21
| | | | | | | | backtraces. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@89562 91177308-0d34-0410-b5e6-96231b3b80d8
* Eliminate more uses of llvm-as and llvm-dis.Dan Gohman2009-09-09
| | | | git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@81293 91177308-0d34-0410-b5e6-96231b3b80d8
* Fix tests.Evan Cheng2009-08-15
| | | | git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@79086 91177308-0d34-0410-b5e6-96231b3b80d8
* Turn on if-conversion for thumb2.Evan Cheng2009-08-15
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@79084 91177308-0d34-0410-b5e6-96231b3b80d8