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path: root/lib/CodeGen/PreAllocSplitting.cpp
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* Slightly change the meaning of the reMaterialize target hook when the originalJakob Stoklund Olesen2010-06-021-1/+1
| | | | | | | | | | | | | | | | | | | | | | | instruction defines subregisters. Any existing subreg indices on the original instruction are preserved or composed with the new subreg index. Also substitute multiple operands mentioning the original register by using the new MachineInstr::substituteRegister() function. This is necessary because there will soon be <imp-def> operands added to non read-modify-write partial definitions. This instruction: %reg1234:foo = FLAP %reg1234<imp-def> will reMaterialize(%reg3333, bar) like this: %reg3333:bar-foo = FLAP %reg333:bar<imp-def> Finally, replace the TargetRegisterInfo pointer argument with a reference to indicate that it cannot be NULL. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@105358 91177308-0d34-0410-b5e6-96231b3b80d8
* - Change MachineInstr::findRegisterDefOperandIdx so it can also look for defsEvan Cheng2010-05-211-1/+1
| | | | | | | | | | | that are aliases of the specified register. - Rename modifiesRegister to definesRegister since it's looking a def of the specific register or one of its super-registers. It's not looking for def of a sub-register or alias that could change the specified register. - Added modifiesRegister to look for defs of aliases. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@104377 91177308-0d34-0410-b5e6-96231b3b80d8
* constify accessor.Chris Lattner2010-05-211-1/+1
| | | | git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@104325 91177308-0d34-0410-b5e6-96231b3b80d8
* Add argument TargetRegisterInfo to loadRegFromStackSlot and storeRegToStackSlot.Evan Cheng2010-05-061-3/+5
| | | | git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@103193 91177308-0d34-0410-b5e6-96231b3b80d8
* Introduce SpecificBumpPtrAllocator, a wrapper for BumpPtrAllocator which allowsBenjamin Kramer2010-03-301-1/+1
| | | | | | | | only a single type of object to be allocated. Use it to make VNInfo destruction typesafe. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@99919 91177308-0d34-0410-b5e6-96231b3b80d8
* move target-independent opcodes out of TargetInstrInfoChris Lattner2010-02-091-2/+1
| | | | | | | | | | into TargetOpcodes.h. #include the new TargetOpcodes.h into MachineInstr. Add new inline accessors (like isPHI()) to MachineInstr, and start using them throughout the codebase. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@95687 91177308-0d34-0410-b5e6-96231b3b80d8
* Simplify code. No intended functionality/performance change.Benjamin Kramer2010-01-071-37/+12
| | | | git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@92938 91177308-0d34-0410-b5e6-96231b3b80d8
* Change errs() to dbgs().David Greene2010-01-051-9/+9
| | | | git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@92588 91177308-0d34-0410-b5e6-96231b3b80d8
* Remove dead variable.Bill Wendling2009-12-281-2/+0
| | | | git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@92179 91177308-0d34-0410-b5e6-96231b3b80d8
* Changed slot index ranges for MachineBasicBlocks to be exclusive of endpoint.Lang Hames2009-12-221-12/+9
| | | | | | | This fixes an in-place update bug where code inserted at the end of basic blocks may not be covered by existing intervals which were live across the entire block. It is also consistent with the way ranges are specified for live intervals. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@91859 91177308-0d34-0410-b5e6-96231b3b80d8
* Moved spill weight calculation out of SimpleRegisterCoalescing and into its ↵Lang Hames2009-12-141-0/+2
| | | | | | own pass: CalculateSpillWeights. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@91273 91177308-0d34-0410-b5e6-96231b3b80d8
* improve portability to avoid conflicting with std::next in c++'0x.Chris Lattner2009-12-031-2/+2
| | | | | | | Patch by Howard Hinnant! git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@90365 91177308-0d34-0410-b5e6-96231b3b80d8
* - Change TargetInstrInfo::reMaterialize to pass in TargetRegisterInfo.Evan Cheng2009-11-141-1/+1
| | | | | | | | | - If destination is a physical register and it has a subreg index, use the sub-register instead. This fixes PR5423. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@88745 91177308-0d34-0410-b5e6-96231b3b80d8
* Added an API to the SlotIndexes pass to allow new instructions to be ↵Lang Hames2009-11-141-53/+20
| | | | | | | | | | inserted into the numbering. PreAllocSplitting is now using this API to insert code. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@88725 91177308-0d34-0410-b5e6-96231b3b80d8
* Add a bool flag to StackObjects telling whether they reference spillDavid Greene2009-11-121-2/+2
| | | | | | | | | | | | | | slots. The AsmPrinter will use this information to determine whether to print a spill/reload comment. Remove default argument values. It's too easy to pass a wrong argument value when multiple arguments have default values. Make everything explicit to trap bugs early. Update all targets to adhere to the new interfaces.. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@87022 91177308-0d34-0410-b5e6-96231b3b80d8
* Fixed an iteration condition in PreAllocSplitting. This should fix some ↵Lang Hames2009-11-121-1/+1
| | | | | | miscompilations casued by PreAllocSplitting. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@86919 91177308-0d34-0410-b5e6-96231b3b80d8
* Fix DenseMap iterator constness.Jeffrey Yasskin2009-11-101-2/+2
| | | | | | | | | | | | | | | | | | | | This patch forbids implicit conversion of DenseMap::const_iterator to DenseMap::iterator which was possible because DenseMapIterator inherited (publicly) from DenseMapConstIterator. Conversion the other way around is now allowed as one may expect. The template DenseMapConstIterator is removed and the template parameter IsConst which specifies whether the iterator is constant is added to DenseMapIterator. Actually IsConst parameter is not necessary since the constness can be determined from KeyT but this is not relevant to the fix and can be addressed later. Patch by Victor Zverovich! git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@86636 91177308-0d34-0410-b5e6-96231b3b80d8
* 80 col.Evan Cheng2009-11-091-2/+4
| | | | git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@86521 91177308-0d34-0410-b5e6-96231b3b80d8
* The Indexes Patch.Lang Hames2009-11-031-88/+110
| | | | | | | | | | | | | | | | | | This introduces a new pass, SlotIndexes, which is responsible for numbering instructions for register allocation (and other clients). SlotIndexes numbering is designed to match the existing scheme, so this patch should not cause any changes in the generated code. For consistency, and to avoid naming confusion, LiveIndex has been renamed SlotIndex. The processImplicitDefs method of the LiveIntervals analysis has been moved into its own pass so that it can be run prior to SlotIndexes. This was necessary to match the existing numbering scheme. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@85979 91177308-0d34-0410-b5e6-96231b3b80d8
* Remove VISIBILITY_HIDDEN from class/struct found inside anonymous namespaces.Nick Lewycky2009-10-251-1/+1
| | | | | | | | Chris claims we should never have visibility_hidden inside any .cpp file but that's still not true even after this commit. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@85042 91177308-0d34-0410-b5e6-96231b3b80d8
* Oops. Backing out 84681 - needs to wait for the indexing patch.Lang Hames2009-10-201-54/+35
| | | | git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@84682 91177308-0d34-0410-b5e6-96231b3b80d8
* Added some debugging output to pre-alloc splitting.Lang Hames2009-10-201-35/+54
| | | | git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@84681 91177308-0d34-0410-b5e6-96231b3b80d8
* Distinquish stack slots from other stack objects. They (and fixed objects) ↵Evan Cheng2009-10-171-1/+1
| | | | | | get FixedStack PseudoSourceValues. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@84326 91177308-0d34-0410-b5e6-96231b3b80d8
* Reset kill markers after live interval is reconstructed.Evan Cheng2009-10-091-6/+22
| | | | git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@83608 91177308-0d34-0410-b5e6-96231b3b80d8
* Remove code that makes no sense.Evan Cheng2009-10-081-2/+0
| | | | git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@83589 91177308-0d34-0410-b5e6-96231b3b80d8
* Oops. Renamed remaining MachineInstrIndex references.Lang Hames2009-10-031-4/+4
| | | | git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@83255 91177308-0d34-0410-b5e6-96231b3b80d8
* Renamed MachineInstrIndex to LiveIndex.Lang Hames2009-10-031-51/+51
| | | | git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@83254 91177308-0d34-0410-b5e6-96231b3b80d8
* Removed static qualifier from a few index related methods. These methods may ↵Lang Hames2009-09-091-16/+15
| | | | | | require a LiveIntervals instance in future. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@81374 91177308-0d34-0410-b5e6-96231b3b80d8
* Replaces uses of unsigned for indexes in LiveInterval and VNInfo withLang Hames2009-09-041-72/+81
| | | | | | | | | 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
* Change Pass::print to take a raw ostream instead of std::ostream,Chris Lattner2009-08-231-4/+1
| | | | | | | update all code that this affects. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@79830 91177308-0d34-0410-b5e6-96231b3b80d8
* Modified VNInfo. The "copy" member is now a union which holds the copy for a ↵Lang Hames2009-08-101-1/+1
| | | | | | 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
* Use setPreservesAll and setPreservesCFG in CodeGen passes.Dan Gohman2009-07-311-0/+1
| | | | git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@77754 91177308-0d34-0410-b5e6-96231b3b80d8
* Let callers decide the sub-register index on the def operand of ↵Evan Cheng2009-07-161-2/+2
| | | | | | | | | rematerialized instructions. Avoid remat'ing instructions whose def have sub-register indices for now. It's just really really hard to get all the cases right. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@75900 91177308-0d34-0410-b5e6-96231b3b80d8
* Fix assert(0) conversion, as suggested by Chris.Edwin Török2009-07-121-4/+1
| | | | git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@75423 91177308-0d34-0410-b5e6-96231b3b80d8
* Convert more assert(0)+abort() -> LLVM_UNREACHABLE,Edwin Török2009-07-111-2/+2
| | | | | | | and abort()/exit() -> llvm_report_error(). git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@75363 91177308-0d34-0410-b5e6-96231b3b80d8
* Improved tracking of value number kills. VN kills are now representedLang Hames2009-07-091-8/+9
| | | | | | | | | | | | | | 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
* VNInfo cleanup.Lang Hames2009-06-171-21/+21
| | | | git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@73634 91177308-0d34-0410-b5e6-96231b3b80d8
* In some rare cases, the register allocator can spill registers but end up ↵Evan Cheng2009-05-031-4/+3
| | | | | | | | | | | not utilizing registers at all. The fundamental problem is linearscan's backtracking can end up freeing more than one allocated registers. However, reloads and restores might be folded into uses / defs and freed registers might not be used at all. VirtRegMap keeps track of allocations so it knows what's not used. As a horrible hack, the stack coloring can color spill slots with *free* registers. That is, it replace reload and spills with copies from and to the free register. It unfold instructions that load and store the spill slot and replace them with register using variants. Not yet enabled. This is part 1. More coming. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@70787 91177308-0d34-0410-b5e6-96231b3b80d8
* Fix pr3954. The register scavenger asserts for inline assembly withBob Wilson2009-04-091-2/+2
| | | | | | | | | | | | | register destinations that are tied to source operands. The TargetInstrDescr::findTiedToSrcOperand method silently fails for inline assembly. The existing MachineInstr::isRegReDefinedByTwoAddr was very close to doing what is needed, so this revision makes a few changes to that method and also renames it to isRegTiedToUseOperand (for consistency with the very similar isRegTiedToDefOperand and because it handles both two-address instructions and inline assembly with tied registers). git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@68714 91177308-0d34-0410-b5e6-96231b3b80d8
* Remove the "fast" cases for spill and restore point determination, as these ↵Owen Anderson2009-03-311-126/+59
| | | | | | | | | were subtlely wrong in obscure cases. Patch the testcase to account for this change. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@68093 91177308-0d34-0410-b5e6-96231b3b80d8
* Give the pre-alloc splitter access to the VirtRegMap. It doesn't do anythingOwen Anderson2009-03-141-0/+8
| | | | | | | useful with it at the moment, but it will in the future. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@67012 91177308-0d34-0410-b5e6-96231b3b80d8
* (Hopefully) silence a warning.Owen Anderson2009-03-051-1/+1
| | | | git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@66158 91177308-0d34-0410-b5e6-96231b3b80d8
* Be more careful about choosing restore points when doing restore folding. ↵Owen Anderson2009-03-051-5/+28
| | | | | | This fixes some subtle miscompilations. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@66147 91177308-0d34-0410-b5e6-96231b3b80d8
* Add a restore folder, which shaves a dozen or so machineinstrs off oggenc. ↵Owen Anderson2009-03-041-6/+75
| | | | | | Update a testcase to check this. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@66029 91177308-0d34-0410-b5e6-96231b3b80d8
* Fix a crash in the pre-alloc splitter exposed by recent codegen changes.Owen Anderson2009-02-201-0/+6
| | | | git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@65121 91177308-0d34-0410-b5e6-96231b3b80d8
* Add TargetInstrInfo::isSafeToMoveRegisterClassDefs. It returns true if it's ↵Evan Cheng2009-02-061-1/+4
| | | | | | safe to move an instruction which defines a value in the register class. Replace pre-splitting specific IgnoreRegisterClassBarriers with this new hook. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@63936 91177308-0d34-0410-b5e6-96231b3b80d8
* Pre-alloc splitting needs to be more careful to avoid inserting spills/restoresOwen Anderson2009-02-051-22/+72
| | | | | | | | between call frame setup/restore points. Unfortunately, this regresses code size a bit, but at least it's correct now! git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@63837 91177308-0d34-0410-b5e6-96231b3b80d8
* MergeValueInto is too smart: it might choose to do the merge the opposite ↵Owen Anderson2009-02-021-2/+18
| | | | | | | | | | direction. Live interval reconstruction needs to account for this, and scour its maps to prevent dangling references. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@63558 91177308-0d34-0410-b5e6-96231b3b80d8
* Refactor PerformPHIConstruction, no functionality changes.Evan Cheng2009-02-021-125/+165
| | | | git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@63536 91177308-0d34-0410-b5e6-96231b3b80d8
* Fix test failures causes by my previous commit.Owen Anderson2009-02-011-0/+1
| | | | git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@63492 91177308-0d34-0410-b5e6-96231b3b80d8
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