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path: root/lib/CodeGen/RegAllocBasic.cpp
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2013-04-12Replace uses of the deprecated std::auto_ptr with OwningPtr.Andy Gibbs
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@179373 91177308-0d34-0410-b5e6-96231b3b80d8
2013-03-05Remove unused #includes.Bill Wendling
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@176467 91177308-0d34-0410-b5e6-96231b3b80d8
2012-12-03Use the new script to sort the includes of every file under lib.Chandler Carruth
Sooooo many of these had incorrect or strange main module includes. I have manually inspected all of these, and fixed the main module include to be the nearest plausible thing I could find. If you own or care about any of these source files, I encourage you to take some time and check that these edits were sensible. I can't have broken anything (I strictly added headers, and reordered them, never removed), but they may not be the headers you'd really like to identify as containing the API being implemented. Many forward declarations and missing includes were added to a header files to allow them to parse cleanly when included first. The main module rule does in fact have its merits. =] git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@169131 91177308-0d34-0410-b5e6-96231b3b80d8
2012-11-28Make the LiveRegMatrix analysis available to targets.Jakob Stoklund Olesen
No functional change, just moved header files. Targets can inject custom passes between register allocation and rewriting. This makes it possible to tweak the register allocation before rewriting, using the full global interference checking available from LiveRegMatrix. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@168806 91177308-0d34-0410-b5e6-96231b3b80d8
2012-08-22Tidy up a few more uses of MF.getFunction()->getName().David Blaikie
Based on CR feedback from r162301 and Craig Topper's refactoring in r162347 here are a few other places that could use the same API (& in one instance drop a Function.h dependency). git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@162367 91177308-0d34-0410-b5e6-96231b3b80d8
2012-06-20Remove the RenderMachineFunction HTML output pass.Jakob Stoklund Olesen
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
2012-06-20Remove LiveIntervalUnions from RegAllocBase.Jakob Stoklund Olesen
They are living in LiveRegMatrix now. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@158868 91177308-0d34-0410-b5e6-96231b3b80d8
2012-06-20Convert RABasic to using LiveRegMatrix interference checking.Jakob Stoklund Olesen
Stop using the LiveIntervalUnions provided by RegAllocBase, they will be removed soon. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@158866 91177308-0d34-0410-b5e6-96231b3b80d8
2012-06-16Guard private fields that are unused in Release builds with #ifndef NDEBUG.Benjamin Kramer
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@158608 91177308-0d34-0410-b5e6-96231b3b80d8
2012-06-15Remove final verification in RABasic.Jakob Stoklund Olesen
We now have a proper machine code verifier pass between register allocation and rewriting. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@158577 91177308-0d34-0410-b5e6-96231b3b80d8
2012-06-09Also compute MBB live-in lists in the new rewriter pass.Jakob Stoklund Olesen
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
2012-06-08Reintroduce VirtRegRewriter.Jakob Stoklund Olesen
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
2012-06-06Remove unused private fields found by clang's new -Wunused-private-field.Benjamin Kramer
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
2012-06-01Switch all register list clients to the new MC*Iterator interface.Jakob Stoklund Olesen
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
2012-05-19Allow LiveRangeEdit to be created with a NULL parent.Jakob Stoklund Olesen
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
2012-04-02Moved LiveRangeEdit.h so that it can be called from other parts of the ↵Pete Cooper
backend, not just libCodeGen git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@153906 91177308-0d34-0410-b5e6-96231b3b80d8
2012-04-02Refactored the LiveRangeEdit interface so that MachineFunction, ↵Pete Cooper
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
2012-03-04Use uint16_t to store register overlaps to reduce static data.Craig Topper
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@152001 91177308-0d34-0410-b5e6-96231b3b80d8
2012-02-28Kill off LiveRangeEdit::getNewVRegs and LiveRangeEdit::getUselessVRegs. TheseLang Hames
methods are no longer needed now that LinearScan has gone away. (Contains tweaks trivialSpillEverywhere to enable the removal of getNewVRegs). git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@151658 91177308-0d34-0410-b5e6-96231b3b80d8
2012-02-21Clear virtual registers after they are no longer referenced.Andrew Trick
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
2012-02-10RegAlloc superpass: includes phi elimination, coalescing, and scheduling.Andrew Trick
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
2012-02-08Add Register mask support to RABasic.Jakob Stoklund Olesen
When a virtual register is live across a call, limit the search space to call-preserved registers. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@150081 91177308-0d34-0410-b5e6-96231b3b80d8
2012-01-17Renamed MachineScheduler to ScheduleTopDownLive.Andrew Trick
Responding to code review. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@148290 91177308-0d34-0410-b5e6-96231b3b80d8
2012-01-17Moving options declarations around.Andrew Trick
More short term hackery until we have a way to configure passes that work on LiveIntervals. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@148289 91177308-0d34-0410-b5e6-96231b3b80d8
2012-01-13Added the MachineSchedulerPass skeleton.Andrew Trick
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@148105 91177308-0d34-0410-b5e6-96231b3b80d8
2012-01-11Make data structures private.Jakob Stoklund Olesen
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@147979 91177308-0d34-0410-b5e6-96231b3b80d8
2012-01-11Sink spillInterferences into RABasic.Jakob Stoklund Olesen
This helper method is too simplistic for RAGreedy. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@147976 91177308-0d34-0410-b5e6-96231b3b80d8
2012-01-11Move RegAllocBase into its own cpp file separate from RABasic.Jakob Stoklund Olesen
No functional change. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@147972 91177308-0d34-0410-b5e6-96231b3b80d8
2012-01-05Freeze reserved registers before starting register allocation.Jakob Stoklund Olesen
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
2011-08-11Privatize an unused part of the LiveIntervalUnion::Query interface.Jakob Stoklund Olesen
No clients are iterating over interference overlaps. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@137350 91177308-0d34-0410-b5e6-96231b3b80d8
2011-08-09Refer to the RegisterCoalescer pass by ID.Jakob Stoklund Olesen
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
2011-07-26Print out the MBB live-in registers.Jakob Stoklund Olesen
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@136178 91177308-0d34-0410-b5e6-96231b3b80d8
2011-07-02Better diagnostics when inline asm fails to allocate.Jakob Stoklund Olesen
asm.c:2:7: error: ran out of registers during register allocation asm(""::"r"(0), "r"(1), "r"(2), "r"(3), "r"(4), "r"(5), "r"(6), "r"(7), "r"(8), "r"(9)); ^ git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@134310 91177308-0d34-0410-b5e6-96231b3b80d8
2011-06-26There is only one register coalescer. Merge it into the base class andRafael Espindola
remove the analysis group. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@133899 91177308-0d34-0410-b5e6-96231b3b80d8
2011-06-26Move RegisterCoalescer.h to lib/CodeGen.Rafael Espindola
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@133895 91177308-0d34-0410-b5e6-96231b3b80d8
2011-06-03Switch AllocationOrder to using RegisterClassInfo instead of a BitVectorJakob Stoklund Olesen
of reserved registers. Use RegisterClassInfo in RABasic as well. This slightly changes som allocation orders because RegisterClassInfo puts CSR aliases last. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@132581 91177308-0d34-0410-b5e6-96231b3b80d8
2011-05-10Fix PR9883. Make sure all caches are invalidated when a live range is repaired.Jakob Stoklund Olesen
The previous invalidation missed the alias interference caches. Also add a stats counter for the number of repaired ranges. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@131133 91177308-0d34-0410-b5e6-96231b3b80d8
2011-05-06Emit a proper error message when register allocators run out of registers.Jakob Stoklund Olesen
This can't be just an assertion, users can always write impossible inline assembly. Such an assembly statement should be included in the error message. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@131024 91177308-0d34-0410-b5e6-96231b3b80d8
2011-04-20Prefer cheap registers for busy live ranges.Jakob Stoklund Olesen
On the x86-64 and thumb2 targets, some registers are more expensive to encode than others in the same register class. Add a CostPerUse field to the TableGen register description, and make it available from TRI->getCostPerUse. This represents the cost of a REX prefix or a 32-bit instruction encoding required by choosing a high register. Teach the greedy register allocator to prefer cheap registers for busy live ranges (as indicated by spill weight). git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@129864 91177308-0d34-0410-b5e6-96231b3b80d8
2011-04-12Fix a bug in RegAllocBase::addMBBLiveIns() where a basic block could ↵Jakob Stoklund Olesen
accidentally be skipped. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@129373 91177308-0d34-0410-b5e6-96231b3b80d8
2011-04-11Reuse live interval union between functions. This saves a bit of compile timeJakob Stoklund Olesen
when compiling many small functions. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@129321 91177308-0d34-0410-b5e6-96231b3b80d8
2011-04-11Use a faster algorithm for computing MBB live-in registers after register ↵Jakob Stoklund Olesen
allocation. LiveIntervals::findLiveInMBBs has to do a full binary search for each segment. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@129292 91177308-0d34-0410-b5e6-96231b3b80d8
2011-04-11Time the initial seeding of live registersJakob Stoklund Olesen
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@129276 91177308-0d34-0410-b5e6-96231b3b80d8
2011-04-05Run LiveDebugVariables in RegAllocBasic and RegAllocGreedy.Jakob Stoklund Olesen
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@128935 91177308-0d34-0410-b5e6-96231b3b80d8
2011-03-31The basic register allocator must also use the inline spiller.Jakob Stoklund Olesen
It is using a trivial rewriter that doesn't know how to insert spill code requested by the standard spiller. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@128688 91177308-0d34-0410-b5e6-96231b3b80d8
2011-03-23Allow the allocation of empty live ranges that have uses.Jakob Stoklund Olesen
Empty ranges may represent undef values. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@128144 91177308-0d34-0410-b5e6-96231b3b80d8
2011-03-16Tag cached interference with a user-provided tag instead of the virtual ↵Jakob Stoklund Olesen
register number. The live range of a virtual register may change which invalidates the cached interference information. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@127772 91177308-0d34-0410-b5e6-96231b3b80d8
2011-03-12Spill multiple registers at once.Jakob Stoklund Olesen
Live range splitting can create a number of small live ranges containing only a single real use. Spill these small live ranges along with the large range they are connected to with copies. This enables memory operand folding and maximizes the spill to fill distance. Work in progress with known bugs. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@127529 91177308-0d34-0410-b5e6-96231b3b80d8
2011-03-10Change the Spiller interface to take a LiveRangeEdit reference.Jakob Stoklund Olesen
This makes it possible to register delegates and get callbacks when the spiller edits live ranges. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@127389 91177308-0d34-0410-b5e6-96231b3b80d8
2011-03-10Make SpillIs an optional pointer. Avoid creating a bunch of temporary ↵Jakob Stoklund Olesen
SmallVectors. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@127388 91177308-0d34-0410-b5e6-96231b3b80d8
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