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path: root/lib/CodeGen/RegAllocPBQP.cpp
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* Remove unused typedef.Lang Hames2012-10-291-1/+0
| | | | git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@166910 91177308-0d34-0410-b5e6-96231b3b80d8
* Remove LIS::isAllocatable() and isReserved() helpers.Jakob Stoklund Olesen2012-10-151-1/+1
| | | | | | All callers can simply use the corresponding MRI functions. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@165985 91177308-0d34-0410-b5e6-96231b3b80d8
* Switch most getReservedRegs() clients to the MRI equivalent.Jakob Stoklund Olesen2012-10-151-3/+1
| | | | | | | Using the cached bit vector in MRI avoids comstantly allocating and recomputing the reserved register bit vector. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@165983 91177308-0d34-0410-b5e6-96231b3b80d8
* My earlier "fix" for PBQP (see r165201) was incorrect. The real issue was thatLang Hames2012-10-101-2/+2
| | | | | | | | | checkRegMaskInterference only initializes the bitmask on the first interference. This fixes PR14027 and (re)fixes PR13945. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@165608 91177308-0d34-0410-b5e6-96231b3b80d8
* Fix reg mask slot test, and preserve LiveIntervals and VirtRegMap in the PBQPLang Hames2012-10-041-1/+3
| | | | | | | allocator. Fixes PR13945. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@165201 91177308-0d34-0410-b5e6-96231b3b80d8
* Remove unused typedefs gcc4.8 warns about.Roman Divacky2012-09-051-1/+0
| | | | git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@163225 91177308-0d34-0410-b5e6-96231b3b80d8
* Add a getName function to MachineFunction. Use it in places that previously ↵Craig Topper2012-08-221-2/+3
| | | | | | did getFunction()->getName(). Remove includes of Function.h that are no longer needed. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@162347 91177308-0d34-0410-b5e6-96231b3b80d8
* Remove LiveIntervals::trackingRegUnits().Jakob Stoklund Olesen2012-06-221-51/+7
| | | | | | | | | With regunit liveness permanently enabled, this function would always return true. Also remove now obsolete code for checking physreg interference. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@159006 91177308-0d34-0410-b5e6-96231b3b80d8
* Remove spurious typedefs.Jakob Stoklund Olesen2012-06-201-3/+0
| | | | git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@158878 91177308-0d34-0410-b5e6-96231b3b80d8
* Remove the RenderMachineFunction HTML output pass.Jakob Stoklund Olesen2012-06-201-8/+0
| | | | | | | I don't think anyone has been using this functionality for a while, and it is getting in the way of refactoring now. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@158876 91177308-0d34-0410-b5e6-96231b3b80d8
* Teach PBQPBuilder::build() about regunit interference.Jakob Stoklund Olesen2012-06-201-33/+31
| | | | | | | Filter out physreg candidates with regunit interferrence. Also compute regmask interference more efficiently. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@158864 91177308-0d34-0410-b5e6-96231b3b80d8
* Avoid iterating with LiveIntervals::iterator.Jakob Stoklund Olesen2012-06-201-13/+9
| | | | | | | | | | That is a DenseMap iterator keyed by pointers, so the iteration order is nondeterministic. I would like to replace the DenseMap with an IndexedMap which doesn't allow iteration. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@158856 91177308-0d34-0410-b5e6-96231b3b80d8
* Also compute MBB live-in lists in the new rewriter pass.Jakob Stoklund Olesen2012-06-091-45/+0
| | | | | | | | | This deduplicates some code from the optimizing register allocators, and it means that it is now possible to change the register allocators' solutions simply by editing the VirtRegMap between the register allocator pass and the rewriter. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@158249 91177308-0d34-0410-b5e6-96231b3b80d8
* Reintroduce VirtRegRewriter.Jakob Stoklund Olesen2012-06-081-8/+0
| | | | | | | | | | | | | | | | | | OK, not really. We don't want to reintroduce the old rewriter hacks. This patch extracts virtual register rewriting as a separate pass that runs after the register allocator. This is possible now that CodeGen/Passes.cpp can configure the full optimizing register allocator pipeline. The rewriter pass uses register assignments in VirtRegMap to rewrite virtual registers to physical registers, and it inserts kill flags based on live intervals. These finalization steps are the same for the optimizing register allocators: RABasic, RAGreedy, and PBQP. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@158244 91177308-0d34-0410-b5e6-96231b3b80d8
* Remove unused private fields found by clang's new -Wunused-private-field.Benjamin Kramer2012-06-061-1/+1
| | | | | | | | There are some that I didn't remove this round because they looked like obvious stubs. There are dead variables in gtest too, they should be fixed upstream. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@158090 91177308-0d34-0410-b5e6-96231b3b80d8
* Switch all register list clients to the new MC*Iterator interface.Jakob Stoklund Olesen2012-06-011-9/+5
| | | | | | | | | | | | | No functional change intended. Sorry for the churn. The iterator classes are supposed to help avoid giant commits like this one in the future. The TableGen-produced register lists are getting quite large, and it may be necessary to change the table representation. This makes it possible to do so without changing all clients (again). git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@157854 91177308-0d34-0410-b5e6-96231b3b80d8
* Small fix for the debug output from PBQP (PR12822).Patrik Hägglund2012-05-231-3/+4
| | | | git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@157319 91177308-0d34-0410-b5e6-96231b3b80d8
* Allow LiveRangeEdit to be created with a NULL parent.Jakob Stoklund Olesen2012-05-191-1/+1
| | | | | | The dead code elimination with callbacks is still useful. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@157100 91177308-0d34-0410-b5e6-96231b3b80d8
* Moved LiveRangeEdit.h so that it can be called from other parts of the ↵Pete Cooper2012-04-021-1/+1
| | | | | | backend, not just libCodeGen git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@153906 91177308-0d34-0410-b5e6-96231b3b80d8
* Refactored the LiveRangeEdit interface so that MachineFunction, ↵Pete Cooper2012-04-021-1/+1
| | | | | | TargetInstrInfo, MachineRegisterInfo, LiveIntervals, and VirtRegMap are all passed into the constructor and stored as members instead of passed in to each method. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@153903 91177308-0d34-0410-b5e6-96231b3b80d8
* Add a debug option to dump PBQP graphs during register allocation.Lang Hames2012-03-261-0/+29
| | | | git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@153483 91177308-0d34-0410-b5e6-96231b3b80d8
* Add support for register masks to PBQP.Lang Hames2012-03-231-4/+38
| | | | git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@153341 91177308-0d34-0410-b5e6-96231b3b80d8
* Use uint16_t to store register overlaps to reduce static data.Craig Topper2012-03-041-1/+1
| | | | git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@152001 91177308-0d34-0410-b5e6-96231b3b80d8
* Use uint16_t instead of unsigned to store registers in reg classes. Reduces ↵Craig Topper2012-03-041-1/+1
| | | | | | static data size. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@151998 91177308-0d34-0410-b5e6-96231b3b80d8
* Clear virtual registers after they are no longer referenced.Andrew Trick2012-02-211-0/+5
| | | | | | | | | | | | | Passes after RegAlloc should be able to rely on MRI->getNumVirtRegs() == 0. This makes sharing code for pre/postRA passes more robust. Now, to check if a pass is running before the RA pipeline begins, use MRI->isSSA(). To check if a pass is running after the RA pipeline ends, use !MRI->getNumVirtRegs(). PEI resets virtual regs when it's done scavenging. PTX will either have to provide its own PEI pass or assign physregs. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@151032 91177308-0d34-0410-b5e6-96231b3b80d8
* RegAlloc superpass: includes phi elimination, coalescing, and scheduling.Andrew Trick2012-02-101-2/+0
| | | | | | | | | | | | | | | | Creates a configurable regalloc pipeline. Ensure specific llc options do what they say and nothing more: -reglloc=... has no effect other than selecting the allocator pass itself. This patch introduces a new umbrella flag, "-optimize-regalloc", to enable/disable the optimizing regalloc "superpass". This allows for example testing coalscing and scheduling under -O0 or vice-versa. When a CodeGen pass requires the MachineFunction to have a particular property, we need to explicitly define that property so it can be directly queried rather than naming a specific Pass. For example, to check for SSA, use MRI->isSSA, not addRequired<PHIElimination>. CodeGen transformation passes are never "required" as an analysis ProcessImplicitDefs does not require LiveVariables. We have a plan to massively simplify some of the early passes within the regalloc superpass. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@150226 91177308-0d34-0410-b5e6-96231b3b80d8
* whitespaceAndrew Trick2012-02-101-11/+11
| | | | git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@150225 91177308-0d34-0410-b5e6-96231b3b80d8
* Convert assert(0) to llvm_unreachableCraig Topper2012-02-051-1/+1
| | | | git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@149816 91177308-0d34-0410-b5e6-96231b3b80d8
* Freeze reserved registers before starting register allocation.Jakob Stoklund Olesen2012-01-051-0/+1
| | | | | | | | | | | The register allocators don't currently support adding reserved registers while they are running. Extend the MRI API to keep track of the set of reserved registers when register allocation started. Target hooks like hasFP() and needsStackRealignment() can look at this set to avoid reserving more registers during register allocation. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@147577 91177308-0d34-0410-b5e6-96231b3b80d8
* Kill off the LoopSplitter. It's not being used or maintained.Lang Hames2011-12-061-9/+0
| | | | git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@145897 91177308-0d34-0410-b5e6-96231b3b80d8
* Update PBQP's analysis usage to reflect the requirements of the inline spiller.Lang Hames2011-12-061-0/+7
| | | | git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@145893 91177308-0d34-0410-b5e6-96231b3b80d8
* Switch PBQP to VRM's trivial rewriter.Jakob Stoklund Olesen2011-11-131-4/+1
| | | | | | The very complicated VirtRegRewriter is going away. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@144479 91177308-0d34-0410-b5e6-96231b3b80d8
* Switch PBQP to the modern InlineSpiller framework.Jakob Stoklund Olesen2011-11-121-40/+11
| | | | | | | | | | | It is worth noting that the old spiller would split live ranges around basic blocks. The new spiller doesn't do that. PBQP should do its own live range splitting with SplitEditor::splitSingleBlock() if desired. See RAGreedy::tryBlockSplit(). git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@144476 91177308-0d34-0410-b5e6-96231b3b80d8
* Refer to the RegisterCoalescer pass by ID.Jakob Stoklund Olesen2011-08-091-1/+1
| | | | | | | A public interface is no longer needed since RegisterCoalescer is not an analysis any more. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@137082 91177308-0d34-0410-b5e6-96231b3b80d8
* There is only one register coalescer. Merge it into the base class andRafael Espindola2011-06-261-1/+1
| | | | | | remove the analysis group. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@133899 91177308-0d34-0410-b5e6-96231b3b80d8
* Move RegisterCoalescer.h to lib/CodeGen.Rafael Espindola2011-06-261-1/+1
| | | | git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@133895 91177308-0d34-0410-b5e6-96231b3b80d8
* Add a hook for PBQP clients to run a custom pre-alloc pass to run prior to ↵Lang Hames2011-06-171-4/+9
| | | | | | PBQP allocation. Patch by Arnaud Allard de Grandmaison. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@133249 91177308-0d34-0410-b5e6-96231b3b80d8
* Move PBQP off allocation_order_begin. No functional change intended.Jakob Stoklund Olesen2011-06-161-5/+4
| | | | | | | I think PBQP could use RegisterClassInfo, but it didn't fit neatly with the external interfaces that PBQP uses, so I'll leave that to Lang. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@133186 91177308-0d34-0410-b5e6-96231b3b80d8
* Make SpillIs an optional pointer. Avoid creating a bunch of temporary ↵Jakob Stoklund Olesen2011-03-101-2/+1
| | | | | | SmallVectors. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@127388 91177308-0d34-0410-b5e6-96231b3b80d8
* Fix some style issues in PBQP. Patch by David Blaikie.Lang Hames2010-11-121-20/+25
| | | | git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@118883 91177308-0d34-0410-b5e6-96231b3b80d8
* Get rid of static constructors for pass registration. Instead, every pass ↵Owen Anderson2010-10-191-1/+12
| | | | | | | | | | | | | | | | | | exposes an initializeMyPassFunction(), which must be called in the pass's constructor. This function uses static dependency declarations to recursively initialize the pass's dependencies. Clients that only create passes through the createFooPass() APIs will require no changes. Clients that want to use the CommandLine options for passes will need to manually call the appropriate initialization functions in PassInitialization.h before parsing commandline arguments. I have tested this with all standard configurations of clang and llvm-gcc on Darwin. It is possible that there are problems with the static dependencies that will only be visible with non-standard options. If you encounter any crash in pass registration/creation, please send the testcase to me directly. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@116820 91177308-0d34-0410-b5e6-96231b3b80d8
* Removed the older style (in-allocator) problem construction system from the ↵Lang Hames2010-10-041-628/+9
| | | | | | PBQP allocator. Problem construction is now done exclusively with the new builders. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@115502 91177308-0d34-0410-b5e6-96231b3b80d8
* Removed VNInfo::isDefAccurate(). Def "accuracy" can be checked by testing ↵Lang Hames2010-09-251-1/+1
| | | | | | whether LiveIntervals::getInstructionFromIndex(def) returns NULL. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@114791 91177308-0d34-0410-b5e6-96231b3b80d8
* Moved the PBQP allocator class out of the header and back in to the cpp file ↵Lang Hames2010-09-231-60/+190
| | | | | | | | | | | | | | | | to hide the gory details. Allocator instances can now be created by calling createPBQPRegisterAllocator. Tidied up use of CoalescerPair as per Jakob's suggestions. Made the new PBQPBuilder based construction process the default. The internal construction process remains in-place and available via -pbqp-builder=false for now. It will be removed shortly if the new process doesn't cause any regressions. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@114626 91177308-0d34-0410-b5e6-96231b3b80d8
* Fixed ambiguous call.Lang Hames2010-09-211-1/+2
| | | | git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@114431 91177308-0d34-0410-b5e6-96231b3b80d8
* Added an additional PBQP problem builder which adds coalescing costs (both ↵Lang Hames2010-09-211-14/+127
| | | | | | between pairs of virtuals, and between virtuals and physicals). git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@114429 91177308-0d34-0410-b5e6-96231b3b80d8
* Unbreak msvc build.Benjamin Kramer2010-09-181-1/+1
| | | | git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@114284 91177308-0d34-0410-b5e6-96231b3b80d8
* Fixed non-const iterator error.Lang Hames2010-09-181-1/+1
| | | | git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@114273 91177308-0d34-0410-b5e6-96231b3b80d8
* Added a separate class (PBQPBuilder) for PBQP Problem construction. This ↵Lang Hames2010-09-181-172/+309
| | | | | | | | | | | | | | class can be extended to support custom constraints. For now the allocator still uses the old (internal) construction mechanism by default. This will be phased out soon assuming no issues with the builder system come up. To invoke the new construction mechanism just pass '-regalloc=pbqp -pbqp-builder' to llc. To provide custom constraints a Target just needs to extend PBQPBuilder and pass an instance of their derived builder to the RegAllocPBQP constructor. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@114272 91177308-0d34-0410-b5e6-96231b3b80d8
* Added support for register allocators to record which intervals are spill ↵Lang Hames2010-09-021-1/+4
| | | | | | | | | | intervals, and where the uses and defs of the original intervals were in the original code. Spill intervals can be hidden using the "-rmf-intervals=virt-nospills*" option. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@112811 91177308-0d34-0410-b5e6-96231b3b80d8
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