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path: root/lib/CodeGen/LiveIntervalAnalysis.cpp
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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
2012-08-03Add an experimental -early-live-intervals option.Jakob Stoklund Olesen
This option runs LiveIntervals before TwoAddressInstructionPass which will eventually learn to exploit and update the analysis. Eventually, LiveIntervals will run before PHIElimination, and we can get rid of LiveVariables. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@161270 91177308-0d34-0410-b5e6-96231b3b80d8
2012-08-03Completely eliminate VNInfo flags.Jakob Stoklund Olesen
The 'unused' state of a value number can be represented as an invalid def SlotIndex. This also exposed code that shouldn't have been looking at unused value VNInfos. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@161258 91177308-0d34-0410-b5e6-96231b3b80d8
2012-08-03Eliminate the VNInfo::hasPHIKill() flag.Jakob Stoklund Olesen
The only real user of the flag was removeCopyByCommutingDef(), and it has been switched to LiveIntervals::hasPHIKill(). All the code changed by this patch was only concerned with computing and propagating the flag. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@161255 91177308-0d34-0410-b5e6-96231b3b80d8
2012-08-03Make the hasPHIKills flag a computed property.Jakob Stoklund Olesen
The VNInfo::HAS_PHI_KILL is only half supported. We precompute it in LiveIntervalAnalysis, but it isn't properly updated by live range splitting and functions like shrinkToUses(). It is only used in one place: RegisterCoalescer::removeCopyByCommutingDef(). This patch changes that function to use a new LiveIntervals::hasPHIKill() function that computes the flag for a given value number. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@161254 91177308-0d34-0410-b5e6-96231b3b80d8
2012-07-27Also compute register mask lists under -new-live-intervals.Jakob Stoklund Olesen
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@160898 91177308-0d34-0410-b5e6-96231b3b80d8
2012-07-27Eliminate the IS_PHI_DEF flag and VNInfo::setIsPHIDef().Jakob Stoklund Olesen
A value number is a PHI def if and only if it begins at a block boundary. This can be derived from the def slot, a separate flag is not necessary. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@160893 91177308-0d34-0410-b5e6-96231b3b80d8
2012-07-27Add a -new-live-intervals experimental option.Jakob Stoklund Olesen
This option replaces the existing live interval computation with one based on LiveRangeCalc.cpp. The new algorithm does not depend on LiveVariables, and it can be run at any time, before or after leaving SSA form. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@160892 91177308-0d34-0410-b5e6-96231b3b80d8
2012-06-22Delete a boring statistic.Jakob Stoklund Olesen
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@159030 91177308-0d34-0410-b5e6-96231b3b80d8
2012-06-22Store live intervals in an IndexedMap.Jakob Stoklund Olesen
It is both smaller and faster than DenseMap. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@159029 91177308-0d34-0410-b5e6-96231b3b80d8
2012-06-22Simplify handleMove() a bit.Jakob Stoklund Olesen
There is no need to check for physreg live ranges. They don't exist any more. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@159019 91177308-0d34-0410-b5e6-96231b3b80d8
2012-06-22Stop computing physreg live ranges.Jakob Stoklund Olesen
Everyone is using on-demand regunit ranges now. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@159018 91177308-0d34-0410-b5e6-96231b3b80d8
2012-06-22Remove LiveIntervals::trackingRegUnits().Jakob Stoklund Olesen
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
2012-06-20Remove the -live-regunits command line option.Jakob Stoklund Olesen
Register allocators depend on it being permanently enabled now. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@158873 91177308-0d34-0410-b5e6-96231b3b80d8
2012-06-20Fix some more LiveInterval enumerations.Jakob Stoklund Olesen
Deterministically enumerate the virtual registers instead. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@158872 91177308-0d34-0410-b5e6-96231b3b80d8
2012-06-20Enable register unit liveness by default.Jakob Stoklund Olesen
Soon we won't need to compute live intervals for physical registers. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@158865 91177308-0d34-0410-b5e6-96231b3b80d8
2012-06-20Only update regunit live ranges that have been precomputed.Jakob Stoklund Olesen
Regunit live ranges are computed on demand, so when mi-sched calls handleMove, some regunits may not have live ranges yet. That makes updating them easier: Just skip the non-existing ranges. They will be computed correctly from the rescheduled machine code when they are needed. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@158831 91177308-0d34-0410-b5e6-96231b3b80d8
2012-06-20Delete dead code.Jakob Stoklund Olesen
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@158827 91177308-0d34-0410-b5e6-96231b3b80d8
2012-06-19Add regunit liveness support to LiveIntervals::handleMove().Jakob Stoklund Olesen
When LiveIntervals is tracking fixed interference in regunits, make sure to update those intervals as well. Currently guarded by -live-regunits. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@158766 91177308-0d34-0410-b5e6-96231b3b80d8
2012-06-1980 col.Jakob Stoklund Olesen
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@158755 91177308-0d34-0410-b5e6-96231b3b80d8
2012-06-06Remove dead debug option -disable-rematerialization.Jakob Stoklund Olesen
Remat has been stable for years, and it isn't done by LiveIntervalAnalysis any longer. (See LiveRangeEdit). git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@158079 91177308-0d34-0410-b5e6-96231b3b80d8
2012-06-05Suppress -Wunused-variable in -Asserts buildMatt Beaumont-Gay
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@158037 91177308-0d34-0410-b5e6-96231b3b80d8
2012-06-05Simplify LiveInterval::print().Jakob Stoklund Olesen
Don't print out the register number and spill weight, making the TRI argument unnecessary. This allows callers to interpret the reg field. It can currently be a virtual register, a physical register, a spill slot, or a register unit. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@158031 91177308-0d34-0410-b5e6-96231b3b80d8
2012-06-05Add experimental support for register unit liveness.Jakob Stoklund Olesen
Instead of computing a live interval per physreg, LiveIntervals can compute live intervals per register unit. This makes impossible the confusing situation where aliasing registers could have overlapping live intervals. It should also make fixed interferernce checking cheaper since registers have fewer register units than aliases. Live intervals for regunits are computed on demand, using MRI use-def chains and the new LiveRangeCalc class. Only regunits live in to ABI blocks are precomputed during LiveIntervals::runOnMachineFunction(). The regunit liveness computations don't depend on LiveVariables. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@158029 91177308-0d34-0410-b5e6-96231b3b80d8
2012-06-05Remove the last remat-related code from LiveIntervalAnalysis.Jakob Stoklund Olesen
Rematerialization is handled by LiveRangeEdit now. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@157974 91177308-0d34-0410-b5e6-96231b3b80d8
2012-06-04Delete dead code.Jakob Stoklund Olesen
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@157963 91177308-0d34-0410-b5e6-96231b3b80d8
2012-06-04Switch LiveIntervals member variable to LLVM naming standards.Jakob Stoklund Olesen
No functional change. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@157957 91177308-0d34-0410-b5e6-96231b3b80d8
2012-05-29Clear the entering, exiting and internal ranges of a bundle before collectingLang Hames
ranges for the instruction about to be bundled. This fixes a bug in an external project where an assertion was triggered due to spurious 'multiple defs' within the bundle. Patch by Ivan Llopard. Thanks Ivan! git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@157632 91177308-0d34-0410-b5e6-96231b3b80d8
2012-05-20LiveRangeQuery simplifies shrinkToUses().Jakob Stoklund Olesen
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@157145 91177308-0d34-0410-b5e6-96231b3b80d8
2012-04-18LiveIntervalUpdate validators weren't recorded after the calls to ↵Pete Cooper
std::for_each. Turns out std::for_each doesn't update the variable passed in for the functor but instead copy constructs a new one. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@155041 91177308-0d34-0410-b5e6-96231b3b80d8
2012-03-21misched: fix LiveInterval update for bottom-up schedulingAndrew Trick
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@153162 91177308-0d34-0410-b5e6-96231b3b80d8
2012-03-21misched: fix LI update for bottom-up.Andrew Trick
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@153158 91177308-0d34-0410-b5e6-96231b3b80d8
2012-03-04Stop fixing bad machine code in LiveIntervalAnalysis.Jakob Stoklund Olesen
The first def of a virtual register cannot also read the register. Assert on such bad machine code instead of trying to fix it. TwoAddressInstructionPass should never create code like that. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@152010 91177308-0d34-0410-b5e6-96231b3b80d8
2012-03-01Move getBundleStart() into MachineInstrBundle.h.Jakob Stoklund Olesen
This allows the function to be inlined, and makes it suitable for use in getInstructionIndex(). Also provide a const version. C++ is great for touch typing practice. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@151782 91177308-0d34-0410-b5e6-96231b3b80d8
2012-02-21Add API "handleMoveIntoBundl" for updating liveness when moving instructions ↵Lang Hames
into bundles. This method takes a bundle start and an MI being bundled, and makes the intervals for the MI's operands appear to start/end on the bundle start. Also fixes some minor cosmetic issues (whitespace, naming convention) in the HMEditor code. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@151099 91177308-0d34-0410-b5e6-96231b3b80d8
2012-02-21Fix some bugs in HMEditor's moveAllOperandsInto logic.Lang Hames
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@151006 91177308-0d34-0410-b5e6-96231b3b80d8
2012-02-19Silence operator precedence warning.Benjamin Kramer
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@150921 91177308-0d34-0410-b5e6-96231b3b80d8
2012-02-19Add machinery for pushing live ranges onto bundle starts while bundling.Lang Hames
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@150915 91177308-0d34-0410-b5e6-96231b3b80d8
2012-02-19Simplify moveEnteringDownFrom rules.Lang Hames
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@150914 91177308-0d34-0410-b5e6-96231b3b80d8
2012-02-19Skip through instructions rather than operands when looking for last use slot.Lang Hames
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@150912 91177308-0d34-0410-b5e6-96231b3b80d8
2012-02-19Fix TODO and trailing whitespace.Lang Hames
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@150910 91177308-0d34-0410-b5e6-96231b3b80d8
2012-02-19Defer sanity checks on live intervals until after all have been updated. ↵Lang Hames
Hold (LiveInterval, LiveRange) pairs to update, rather than vregs. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@150909 91177308-0d34-0410-b5e6-96231b3b80d8
2012-02-17Bring HMEditor into line with LLVM coding standards.Lang Hames
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@150851 91177308-0d34-0410-b5e6-96231b3b80d8
2012-02-17Sink variable into assertMatt Beaumont-Gay
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@150841 91177308-0d34-0410-b5e6-96231b3b80d8
2012-02-17Add support for regmask slots to HMEditor. Also fixes a comment error.Lang Hames
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@150840 91177308-0d34-0410-b5e6-96231b3b80d8
2012-02-17Refactor 'handleMove' code in live intervals. Clients of LiveIntervals won't seeLang Hames
any changes. Internally this adds a private inner class HMEditor, to LiveIntervals. HMEditor provides an API for updating live intervals when code is moved or bundled. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@150826 91177308-0d34-0410-b5e6-96231b3b80d8
2012-02-17Oops - isRegLiveIntoSuccessor is used in non-assert builds now. Remove ↵Lang Hames
NDEBUG guards. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@150771 91177308-0d34-0410-b5e6-96231b3b80d8
2012-02-17Turn off assertion, conservatively compute liveness for live-in ↵Lang Hames
un-allocatable registers. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@150768 91177308-0d34-0410-b5e6-96231b3b80d8
2012-02-15Make LiveIntervals::handleMove() bundle aware.Lang Hames
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@150630 91177308-0d34-0410-b5e6-96231b3b80d8
2012-02-15Fix assertion condition.Lang Hames
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@150627 91177308-0d34-0410-b5e6-96231b3b80d8
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