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path: root/lib/CodeGen/StrongPHIElimination.cpp
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2009-09-09Removed static qualifier from a few index related methods. These methods may ↵Lang Hames
require a LiveIntervals instance in future. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@81374 91177308-0d34-0410-b5e6-96231b3b80d8
2009-09-04Replaces uses of unsigned for indexes in LiveInterval and VNInfo withLang Hames
a new class, MachineInstrIndex, which hides arithmetic details from most clients. This is a step towards allowing the register allocator to update/insert code during allocation. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@81040 91177308-0d34-0410-b5e6-96231b3b80d8
2009-08-23remove a few DOUTs here and there.Chris Lattner
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@79832 91177308-0d34-0410-b5e6-96231b3b80d8
2009-08-10Modified VNInfo. The "copy" member is now a union which holds the copy for a ↵Lang Hames
register interval, or the defining register for a stack interval. Access is via getCopy/setCopy and getReg/setReg. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@78620 91177308-0d34-0410-b5e6-96231b3b80d8
2009-07-31Use setPreservesAll and setPreservesCFG in CodeGen passes.Dan Gohman
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@77754 91177308-0d34-0410-b5e6-96231b3b80d8
2009-07-09Improved tracking of value number kills. VN kills are now representedLang Hames
as an (index,bool) pair. The bool flag records whether the kill is a PHI kill or not. This code will be used to enable splitting of live intervals containing PHI-kills. A slight change to live interval weights introduced an extra spill into lsr-code-insertion (outside the critical sections). The test condition has been updated to reflect this. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@75097 91177308-0d34-0410-b5e6-96231b3b80d8
2009-06-17VNInfo cleanup.Lang Hames
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@73634 91177308-0d34-0410-b5e6-96231b3b80d8
2009-06-02Update to in-place spilling framework. Includes live interval scaling and ↵Lang Hames
trivial rewriter. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@72729 91177308-0d34-0410-b5e6-96231b3b80d8
2008-10-12Fix a bug in live-in detection that caused lost-copy problems to show up.Owen Anderson
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@57424 91177308-0d34-0410-b5e6-96231b3b80d8
2008-10-04Fix compilation error on MSVC.Argyrios Kyrtzidis
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@57046 91177308-0d34-0410-b5e6-96231b3b80d8
2008-10-03Switch the MachineOperand accessors back to the short names likeDan Gohman
isReg, etc., from isRegister, etc. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@57006 91177308-0d34-0410-b5e6-96231b3b80d8
2008-10-02Use a multimap rather than a map for holding the list of copies to insert, ↵Owen Anderson
so we don't lose copies when two of them have the same source. I don't know what I was thinking when I wrote this originally. Note: There's probably a more efficient way to do this, but I need to think about it some more, and about what determinism guarantees need to be present. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@56964 91177308-0d34-0410-b5e6-96231b3b80d8
2008-09-30Mark merged-in VNInfo's as being PHIKilled.Owen Anderson
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@56893 91177308-0d34-0410-b5e6-96231b3b80d8
2008-09-26We don't need to insert copies for implicit_def's.Owen Anderson
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@56674 91177308-0d34-0410-b5e6-96231b3b80d8
2008-09-24Fix off-by-one error when updating live intervals.Owen Anderson
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@56567 91177308-0d34-0410-b5e6-96231b3b80d8
2008-09-23Add initial support for inserting last minute copies.Owen Anderson
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@56485 91177308-0d34-0410-b5e6-96231b3b80d8
2008-09-22Significant improvements to the logic for merging live intervals. This code ↵Owen Anderson
can't just use LI::MergeValueAsValue, as its behavior in the presence of overlapping ranges isn't what StrongPHIElimination wants. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@56472 91177308-0d34-0410-b5e6-96231b3b80d8
2008-09-04Tidy up several unbeseeming casts from pointer to intptr_t.Dan Gohman
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@55779 91177308-0d34-0410-b5e6-96231b3b80d8
2008-08-14Use empty() instead of begin() == end().Dan Gohman
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@54780 91177308-0d34-0410-b5e6-96231b3b80d8
2008-08-13Get rid of unused variable.Owen Anderson
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@54742 91177308-0d34-0410-b5e6-96231b3b80d8
2008-08-131) Merge entire live intervals instead of parts of them.Owen Anderson
2) Conditionalize temporary insertion if we don't need it. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@54741 91177308-0d34-0410-b5e6-96231b3b80d8
2008-08-07Do a dominator walk when scheduling copies, rather than a DFS on the CFG. ↵Owen Anderson
Also, fix a few problems when creating live intervals for temporaries created by phi elimination. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@54483 91177308-0d34-0410-b5e6-96231b3b80d8
2008-08-06Correct handle cases where two phis are coalesced together, and correct ↵Owen Anderson
break up the case where two different phis want to coalesce with the same vreg. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@54426 91177308-0d34-0410-b5e6-96231b3b80d8
2008-08-06We don't need to try to coalesce input vregs that are the same as the output ↵Owen Anderson
vreg. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@54422 91177308-0d34-0410-b5e6-96231b3b80d8
2008-08-06Only trim a live interval if the register is not used after the PHI node.Owen Anderson
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@54421 91177308-0d34-0410-b5e6-96231b3b80d8
2008-08-05Oops, we were already checking for dead phis. Handle this the proper way, then.Owen Anderson
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@54371 91177308-0d34-0410-b5e6-96231b3b80d8
2008-08-05We don't need to update live intervals for dead PHIs.Owen Anderson
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@54369 91177308-0d34-0410-b5e6-96231b3b80d8
2008-07-30Use existing LiveInterval methods to simplify live interval merging. Thanks ↵Owen Anderson
to Evan for pointing these out. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@54225 91177308-0d34-0410-b5e6-96231b3b80d8
2008-07-30When merging live intervals, we also need to merge in any live ranges that ↵Owen Anderson
are inputs to two-address instructions that themselves define a range we already care about. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@54185 91177308-0d34-0410-b5e6-96231b3b80d8
2008-07-29When merging a PHI operand's live interval into the PHI's live interval, we ↵Owen Anderson
need to merge over all liveranges in the operand's interval that share the relevant value number, not just the range that immediately precedes the PHI. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@54174 91177308-0d34-0410-b5e6-96231b3b80d8
2008-07-25Fix the issues originally addressed in r54070. After thinking about it some ↵Owen Anderson
more, I realized that the right thing to do is to have StrongPHIElimination use its knowledge of the PHIs before they're erased to update the intervals appropriate. This is both simpler and more accurate than the alternative, which was having LIA figure it out when it renumbered things, plus it's just the right thing to do! git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@54077 91177308-0d34-0410-b5e6-96231b3b80d8
2008-07-25In order to avoid reprocessing a register more than once, we need to add itOwen Anderson
to the handled set so it will get filtered out in future iterations. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@54065 91177308-0d34-0410-b5e6-96231b3b80d8
2008-07-25Remove live interval entries for an interval if we're eliminating its only VN.Owen Anderson
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@54062 91177308-0d34-0410-b5e6-96231b3b80d8
2008-07-24Store the predecessor MBB in the PHIUnion, rather than an index, since the ↵Owen Anderson
indices will change after renumbering. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@53985 91177308-0d34-0410-b5e6-96231b3b80d8
2008-06-05Remove debugging code.Owen Anderson
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@52016 91177308-0d34-0410-b5e6-96231b3b80d8
2008-06-05Use the newly created helper on LiveIntervals.Owen Anderson
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@52013 91177308-0d34-0410-b5e6-96231b3b80d8
2008-06-04Correctly construct live intervals for the copies we inserted into the ↵Owen Anderson
predecessors of a block containing a PHI. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@51950 91177308-0d34-0410-b5e6-96231b3b80d8
2008-06-04We need to subtract one from this index because live ranges are open at the end.Owen Anderson
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@51922 91177308-0d34-0410-b5e6-96231b3b80d8
2008-05-30Preserve the register coallescer, and update live intervals more correctly ↵Owen Anderson
by triggering a renumbering after phi elimination. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@51780 91177308-0d34-0410-b5e6-96231b3b80d8
2008-05-13Change class' public PassInfo variables to by initialized with theDan Gohman
address of the PassInfo directly instead of calling getPassInfo. This eliminates a bunch of dynamic initializations of static data. Also, fold RegisterPassBase into PassInfo, make a bunch of its data members const, and rearrange some code to initialize data members in constructors instead of using setter member functions. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@51022 91177308-0d34-0410-b5e6-96231b3b80d8
2008-05-13Clean up the use of static and anonymous namespaces. This turned upDan Gohman
several things that were neither in an anonymous namespace nor static but not intended to be global. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@51017 91177308-0d34-0410-b5e6-96231b3b80d8
2008-04-02In some situations, we need to check for local interferences between the PHIOwen Anderson
node and its inputs. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@49070 91177308-0d34-0410-b5e6-96231b3b80d8
2008-04-02Correctly mark a valno that was previous defined by a PHI node as having anOwen Anderson
unknown defining inst after PHI elimination. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@49069 91177308-0d34-0410-b5e6-96231b3b80d8
2008-04-01Don't dereference MBB->end().Owen Anderson
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@49043 91177308-0d34-0410-b5e6-96231b3b80d8
2008-03-31Fix a major bug in the DFS calculation. Thanks for Christopher Lamb for ↵Owen Anderson
pointing this out. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@48973 91177308-0d34-0410-b5e6-96231b3b80d8
2008-03-29Remove some unneeded code for LiveInterval joining, and fix a bug in the Phi ↵Owen Anderson
elimination algorithm where we were accidentally reasoning about the source rather than the destination. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@48936 91177308-0d34-0410-b5e6-96231b3b80d8
2008-03-26Dead PHI instructions need to be handled specially.Owen Anderson
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@48811 91177308-0d34-0410-b5e6-96231b3b80d8
2008-03-25Remove some debugging code.Owen Anderson
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@48803 91177308-0d34-0410-b5e6-96231b3b80d8
2008-03-25StrongPHIElimination doesn't support swapping live intervals like the ↵Owen Anderson
coalescer does. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@48802 91177308-0d34-0410-b5e6-96231b3b80d8
2008-03-24Remove #include<iostream>, which I was using for debugging.Owen Anderson
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@48739 91177308-0d34-0410-b5e6-96231b3b80d8
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