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path: root/lib/CodeGen/RegAllocBase.h
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* [weak vtables] Remove a bunch of weak vtablesJuergen Ributzka2013-11-19
| | | | | | | | | | | | This patch removes most of the trivial cases of weak vtables by pinning them to a single object file. The memory leaks in this version have been fixed. Thanks Alexey for pointing them out. Differential Revision: http://llvm-reviews.chandlerc.com/D2068 Reviewed by Andy git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@195064 91177308-0d34-0410-b5e6-96231b3b80d8
* Revert r194865 and r194874.Alexey Samsonov2013-11-18
| | | | | | | | | | | | | This change is incorrect. If you delete virtual destructor of both a base class and a subclass, then the following code: Base *foo = new Child(); delete foo; will not cause the destructor for members of Child class. As a result, I observe plently of memory leaks. Notable examples I investigated are: ObjectBuffer and ObjectBufferStream, AttributeImpl and StringSAttributeImpl. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@194997 91177308-0d34-0410-b5e6-96231b3b80d8
* [weak vtables] Remove a bunch of weak vtablesJuergen Ributzka2013-11-15
| | | | | | | | | | | This patch removes most of the trivial cases of weak vtables by pinning them to a single object file. Differential Revision: http://llvm-reviews.chandlerc.com/D2068 Reviewed by Andy git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@194865 91177308-0d34-0410-b5e6-96231b3b80d8
* Revert "Give internal classes hidden visibility."Benjamin Kramer2013-09-11
| | | | | | | It works with clang, but GCC has different rules so we can't make all of those hidden. This reverts commit r190534. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@190536 91177308-0d34-0410-b5e6-96231b3b80d8
* Give internal classes hidden visibility.Benjamin Kramer2013-09-11
| | | | | | Worth 100k on a linux/x86_64 Release+Asserts clang. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@190534 91177308-0d34-0410-b5e6-96231b3b80d8
* Track new virtual registers by register number.Mark Lacey2013-08-14
| | | | | | | | | | Track new virtual registers by register number, rather than by the live interval created for them. This is the first step in separating the creation of new virtual registers and new live intervals. Eventually live intervals will be created and populated on demand after the virtual registers have been created and used in instructions. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@188434 91177308-0d34-0410-b5e6-96231b3b80d8
* LiveIntervalUnion is not used in RegAllocBase.Jakob Stoklund Olesen2013-08-14
| | | | | | Patch by Matthias Braun! git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@188389 91177308-0d34-0410-b5e6-96231b3b80d8
* Make constant string pointer into an array to remove a pointer lookup for ↵Craig Topper2013-07-17
| | | | | | every access. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@186482 91177308-0d34-0410-b5e6-96231b3b80d8
* Sort includes for all of the .h files under the 'lib' tree. These wereChandler Carruth2012-12-04
| | | | | | | | | | missed in the first pass because the script didn't yet handle include guards. Note that the script is now able to handle all of these headers without manual edits. =] git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@169224 91177308-0d34-0410-b5e6-96231b3b80d8
* Make the LiveRegMatrix analysis available to targets.Jakob Stoklund Olesen2012-11-28
| | | | | | | | | | | 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
* Remove LiveIntervalUnions from RegAllocBase.Jakob Stoklund Olesen2012-06-20
| | | | | | They are living in LiveRegMatrix now. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@158868 91177308-0d34-0410-b5e6-96231b3b80d8
* Convert RABasic to using LiveRegMatrix interference checking.Jakob Stoklund Olesen2012-06-20
| | | | | | | 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
* Also compute MBB live-in lists in the new rewriter pass.Jakob Stoklund Olesen2012-06-09
| | | | | | | | | 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
* Move RegisterClassInfo.h.Andrew Trick2012-06-06
| | | | | | | Allow targets to access this API. It's required for RegisterPressure. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@158102 91177308-0d34-0410-b5e6-96231b3b80d8
* Move LiveUnionArray into LiveIntervalUnion.hJakob Stoklund Olesen2012-06-05
| | | | | | It is useful outside RegAllocBase. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@158041 91177308-0d34-0410-b5e6-96231b3b80d8
* Make data structures private.Jakob Stoklund Olesen2012-01-11
| | | | git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@147979 91177308-0d34-0410-b5e6-96231b3b80d8
* Sink spillInterferences into RABasic.Jakob Stoklund Olesen2012-01-11
| | | | | | 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
* Cleanup.Jakob Stoklund Olesen2012-01-11
| | | | git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@147975 91177308-0d34-0410-b5e6-96231b3b80d8
* Switch AllocationOrder to using RegisterClassInfo instead of a BitVectorJakob Stoklund Olesen2011-06-03
| | | | | | | | | 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
* Fix PR9883. Make sure all caches are invalidated when a live range is repaired.Jakob Stoklund Olesen2011-05-10
| | | | | | | | 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
* Tag cached interference with a user-provided tag instead of the virtual ↵Jakob Stoklund Olesen2011-03-16
| | | | | | | | | 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
* Change the RAGreedy register assignment order so large live ranges are ↵Jakob Stoklund Olesen2011-02-22
| | | | | | | | | | | | | | allocated first. This is based on the observation that long live ranges are more difficult to allocate, so there is a better chance of solving the puzzle by handling the big pieces first. The allocator will evict and split long alive ranges when they get in the way. RABasic is still using spill weights for its priority queue, so the interface to the queue has been virtualized. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@126259 91177308-0d34-0410-b5e6-96231b3b80d8
* Evict a lighter single interference before attempting to split a live range.Jakob Stoklund Olesen2011-02-09
| | | | | | | | | | | | | | Registers are not allocated strictly in spill weight order when live range splitting and spilling has created new shorter intervals with higher spill weights. When one of the new heavy intervals conflicts with a single lighter interval, simply evict the old interval instead of trying to split the heavy one. The lighter interval is a better candidate for splitting, it has a smaller use density. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@125151 91177308-0d34-0410-b5e6-96231b3b80d8
* Add a missing word to a comment.Cameron Zwarich2010-12-29
| | | | git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@122625 91177308-0d34-0410-b5e6-96231b3b80d8
* Make the -verify-regalloc command line option available to base classes asJakob Stoklund Olesen2010-12-17
| | | | | | | | RegAllocBase::VerifyEnabled. Run the machine code verifier in a few interesting places during RegAllocGreedy. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@122107 91177308-0d34-0410-b5e6-96231b3b80d8
* Add named timer groups for the different stages of register allocation.Jakob Stoklund Olesen2010-12-11
| | | | git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@121604 91177308-0d34-0410-b5e6-96231b3b80d8
* Move MRI into RegAllocBase. Clean up debug output a bit.Jakob Stoklund Olesen2010-12-10
| | | | git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@121599 91177308-0d34-0410-b5e6-96231b3b80d8
* Added register reassignment prototype to RAGreedy. It's a simpleAndrew Trick2010-12-09
| | | | | | | | heuristic to reshuffle register assignments when we can't find an available reg. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@121388 91177308-0d34-0410-b5e6-96231b3b80d8
* Store (priority,regnum) pairs in the priority queue instead of providing anJakob Stoklund Olesen2010-12-08
| | | | | | | | | | | | | | | | | | | | | | | abstract priority queue interface in subclasses that want to override the priority calculations. Subclasses must provide a getPriority() implementation instead. This approach requires less code as long as priorities are expressable as simple floats, and it avoids the dangers of defining potentially expensive priority comparison functions. It also should speed up priority_queue operations since they no longer have to chase pointers when comparing registers. This is not measurable, though. Preferably, we shouldn't use floats to guide code generation. The use of floats here is derived from the use of floats for spill weights. Spill weights have a dynamic range that doesn't lend itself easily to a fixpoint implementation. When someone invents a stable spill weight representation, it can be reused for allocation priorities. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@121294 91177308-0d34-0410-b5e6-96231b3b80d8
* Move RABasic::addMBBLiveIns to the base class, it is generally useful.Jakob Stoklund Olesen2010-12-08
| | | | | | | Minor optimization to the use of IntervalMap iterators. They are fairly heavyweight, so prefer SI.valid() over SI != end(). git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@121217 91177308-0d34-0410-b5e6-96231b3b80d8
* Switch LiveIntervalUnion from std::set to IntervalMap.Jakob Stoklund Olesen2010-12-07
| | | | | | | This speeds up RegAllocBasic by 20%, not counting releaseMemory which becomes way faster. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@121201 91177308-0d34-0410-b5e6-96231b3b80d8
* Coding style. No significant functionality. Abandon linear scan styleAndrew Trick2010-11-30
| | | | | | | | | in favor of the widespread llvm style. Capitalize variables and add newlines for visual parsing. Rename variables for readability. And other cleanup. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@120490 91177308-0d34-0410-b5e6-96231b3b80d8
* Check TRI->getReservedRegs because other allocators do it. Even thoughAndrew Trick2010-11-11
| | | | | | | | | it makes no sense for allocation_order iterators to visit reserved regs. The inline spiller depends on AliasAnalysis. Manage the Query state to avoid uninitialized or stale results. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@118800 91177308-0d34-0410-b5e6-96231b3b80d8
* RABasic is nearly functionally complete. There are a few remainingAndrew Trick2010-11-10
| | | | | | | | | | benchmarks hitting an assertion. Adds LiveIntervalUnion::collectInterferingVRegs. Fixes "late spilling" by checking for any unspillable live vregs among all physReg aliases. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@118701 91177308-0d34-0410-b5e6-96231b3b80d8
* Adds RABasic verification and tracing.Andrew Trick2010-11-09
| | | | | | | (retry now that the windows build is green) git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@118630 91177308-0d34-0410-b5e6-96231b3b80d8
* Reverting r118604. Windows build broke.Andrew Trick2010-11-09
| | | | git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@118613 91177308-0d34-0410-b5e6-96231b3b80d8
* Adds RABasic verification and tracing.Andrew Trick2010-11-09
| | | | git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@118604 91177308-0d34-0410-b5e6-96231b3b80d8
* Adds support for spilling previously allocated live intervals toAndrew Trick2010-11-08
| | | | | | | | | | handle cases in which a register is unavailable for spill code. Adds LiveIntervalUnion::extract. While processing interferences on a live virtual register, reuses the same Query object for each physcial reg. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@118423 91177308-0d34-0410-b5e6-96231b3b80d8
* Jakob's review of the basic register allocator.Andrew Trick2010-10-26
| | | | git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@117384 91177308-0d34-0410-b5e6-96231b3b80d8
* Nonvirtual dtor that was accessible enough to be bad.Andrew Trick2010-10-22
| | | | git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@117180 91177308-0d34-0410-b5e6-96231b3b80d8
* This is a prototype of an experimental register allocationAndrew Trick2010-10-22
framework. It's purpose is not to improve register allocation per se, but to make it easier to develop powerful live range splitting. I call it the basic allocator because it is as simple as a global allocator can be but provides the building blocks for sophisticated register allocation with live range splitting. A minimal implementation is provided that trivially spills whenever it runs out of registers. I'm checking in now to get high-level design and style feedback. I've only done minimal testing. The next step is implementing a "greedy" allocation algorithm that does some register reassignment and makes better splitting decisions. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@117174 91177308-0d34-0410-b5e6-96231b3b80d8
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