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* - Coalesce extract_subreg when both intervals are relatively small.Evan Cheng2007-11-011-23/+46
| | | | | | | - Some code clean up. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@43606 91177308-0d34-0410-b5e6-96231b3b80d8
* Really fix PR1734. Carefully track which register uses are sub-register uses byEvan Cheng2007-10-181-8/+25
| | | | | | | traversing inverse register coalescing map. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@43118 91177308-0d34-0410-b5e6-96231b3b80d8
* One more extract_subreg coalescing bug fix.Evan Cheng2007-10-171-1/+1
| | | | git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@43065 91177308-0d34-0410-b5e6-96231b3b80d8
* Fix PR1734.Evan Cheng2007-10-161-1/+1
| | | | git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@43035 91177308-0d34-0410-b5e6-96231b3b80d8
* Code clean up.Evan Cheng2007-10-161-13/+27
| | | | git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@43026 91177308-0d34-0410-b5e6-96231b3b80d8
* Fix PR1729: watch out for val# with no def.Evan Cheng2007-10-151-8/+13
| | | | git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@42996 91177308-0d34-0410-b5e6-96231b3b80d8
* When coalescing an EXTRACT_SUBREG and the dst register is a physical register,Evan Cheng2007-10-141-25/+27
| | | | | | | | | the source register will be coalesced to the super register of the LHS. Properly merge in the live ranges of the resulting coalesced interval that were part of the original source interval to the live interval of the super-register. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@42961 91177308-0d34-0410-b5e6-96231b3b80d8
* Restrict EXTRACT_SUBREG coalescing to avoid negative performance impact.Evan Cheng2007-10-121-1/+6
| | | | git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@42903 91177308-0d34-0410-b5e6-96231b3b80d8
* EXTRACT_SUBREG coalescing support. The coalescer now treats EXTRACT_SUBREG likeEvan Cheng2007-10-121-17/+106
| | | | | | | | | | (almost) a register copy. However, it always coalesced to the register of the RHS (the super-register). All uses of the result of a EXTRACT_SUBREG are sub- register uses which adds subtle complications to load folding, spiller rewrite, etc. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@42899 91177308-0d34-0410-b5e6-96231b3b80d8
* Bad choice of variable name.Evan Cheng2007-10-101-2/+2
| | | | git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@42821 91177308-0d34-0410-b5e6-96231b3b80d8
* Fix an extremely stupid bug that prevented first round of coalescing ↵Evan Cheng2007-10-091-1/+2
| | | | | | (physical registers only) from happening. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@42820 91177308-0d34-0410-b5e6-96231b3b80d8
* Remove isReg, isImm, and isMBB, and change all their users to use Dan Gohman2007-09-141-5/+5
| | | | | | | | isRegister, isImmediate, and isMachineBasicBlock, which are equivalent, and more popular. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@41958 91177308-0d34-0410-b5e6-96231b3b80d8
* Pluggable coalescers inplementation.David Greene2007-09-061-0/+11
| | | | git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@41743 91177308-0d34-0410-b5e6-96231b3b80d8
* Use pool allocator for all the VNInfo's to improve memory access locality. ↵Evan Cheng2007-09-051-9/+10
| | | | | | This reduces coalescing time on siod Mac OS X PPC by 35%. Also remove the back ptr from VNInfo to LiveInterval and other tweaks. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@41729 91177308-0d34-0410-b5e6-96231b3b80d8
* More tweaks to improve compile time.Evan Cheng2007-09-011-19/+21
| | | | git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@41669 91177308-0d34-0410-b5e6-96231b3b80d8
* std::map -> DenseMap for slight compile time benefit.Evan Cheng2007-08-311-7/+7
| | | | git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@41650 91177308-0d34-0410-b5e6-96231b3b80d8
* Use std::map instead of a (potentially very sparse) array to track val# ↵Evan Cheng2007-08-311-36/+27
| | | | | | defined by copy from the other live range. Minor compile time win when number of val# is large. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@41640 91177308-0d34-0410-b5e6-96231b3b80d8
* Change LiveRange so it keeps a pointer to the VNInfo rather than an index.Evan Cheng2007-08-291-110/+118
| | | | | | | | Changes related modules so VNInfo's are not copied. This decrease copy coalescing time by 45% and overall compilation time by 10% on siod. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@41579 91177308-0d34-0410-b5e6-96231b3b80d8
* Recover most of the compile time regression due to recent live interval changes.Evan Cheng2007-08-281-17/+27
| | | | | | | | | 1. Eliminate the costly live interval "swapping". 2. Change ValueNumberInfo container from SmallVector to std::vector. The former performs slowly when the vector size is very large. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@41536 91177308-0d34-0410-b5e6-96231b3b80d8
* Fix some kill info update bugs; add hidden option -disable-rematerialization ↵Evan Cheng2007-08-161-0/+6
| | | | | | to turn off remat for debugging. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@41118 91177308-0d34-0410-b5e6-96231b3b80d8
* Fix for PR1596: AdjustCopiesBackFrom() should conservatively check if any of ↵Evan Cheng2007-08-141-0/+13
| | | | | | its sub-registers may overlap with the interval of the copy that's being coalesced. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@41084 91177308-0d34-0410-b5e6-96231b3b80d8
* Kill info update bugs.Evan Cheng2007-08-141-1/+1
| | | | git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@41064 91177308-0d34-0410-b5e6-96231b3b80d8
* Re-implement trivial rematerialization. This allows def MIs whose live ↵Evan Cheng2007-08-131-6/+0
| | | | | | intervals that are coalesced to be rematerialized. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@41060 91177308-0d34-0410-b5e6-96231b3b80d8
* No need to remove dead range from soon-to-be-dead live interval. Its val# ↵Evan Cheng2007-08-121-3/+3
| | | | | | may be out of whack. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@41024 91177308-0d34-0410-b5e6-96231b3b80d8
* Code to maintain kill information during register coalescing.Evan Cheng2007-08-111-14/+42
| | | | git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@41016 91177308-0d34-0410-b5e6-96231b3b80d8
* unbreak the buildChris Lattner2007-08-091-1/+1
| | | | git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@40976 91177308-0d34-0410-b5e6-96231b3b80d8
* Bug fix. ~1U marks the val# dead.Evan Cheng2007-08-091-1/+1
| | | | git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@40975 91177308-0d34-0410-b5e6-96231b3b80d8
* - Each val# can have multiple kills.Evan Cheng2007-08-081-2/+2
| | | | | | | | - Fix some minor bugs related to special markers on val# def. ~0U means undefined, ~1U means dead val#. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@40916 91177308-0d34-0410-b5e6-96231b3b80d8
* - LiveInterval value#'s now have 3 components: def instruction #,Evan Cheng2007-08-071-12/+12
| | | | | | | | | | | kill instruction #, and source register number (iff the value# is defined by a copy). - Now def instruction # is set for every value#, not just for copy defined ones. - Update some outdated code related inactive live ranges. - Kill info not yet set. That's next patch. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@40913 91177308-0d34-0410-b5e6-96231b3b80d8
* shorten this nameChris Lattner2007-08-051-2/+1
| | | | git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@40843 91177308-0d34-0410-b5e6-96231b3b80d8
* simpleregistercoalescing -> regcoalescing. It's too long for me to handle.Evan Cheng2007-07-311-1/+1
| | | | git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@40654 91177308-0d34-0410-b5e6-96231b3b80d8
* Don't assume that only Uses can be kills. Defs are marked as kills initiallyDan Gohman2007-07-201-2/+2
| | | | | | | | | when there are no uses. This fixes a dangling-pointer bug, where pointers to deleted instructions were not removed from kills lists. More info here: http://lists.cs.uiuc.edu/pipermail/llvmdev/2007-July/009749.html git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@40131 91177308-0d34-0410-b5e6-96231b3b80d8
* Add comment.Evan Cheng2007-07-181-0/+3
| | | | git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@40022 91177308-0d34-0410-b5e6-96231b3b80d8
* fix typosGabor Greif2007-07-091-31/+31
| | | | git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@38453 91177308-0d34-0410-b5e6-96231b3b80d8
* Factor live variable analysis so it does not do register coalescingDavid Greene2007-06-081-0/+1138
simultaneously. Move that pass to SimpleRegisterCoalescing. This makes it easier to implement alternative register allocation and coalescing strategies while maintaining reuse of the existing live interval analysis. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@37520 91177308-0d34-0410-b5e6-96231b3b80d8
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