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path: root/lib/CodeGen/LiveIntervalUnion.cpp
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* Speed up eviction by stopping collectInterferingVRegs as soon as the spillJakob Stoklund Olesen2011-04-111-3/+9
| | | | | | weight limit has been exceeded. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@129305 91177308-0d34-0410-b5e6-96231b3b80d8
* Speed up LiveIntervalUnion::unify by handling end insertion specially.Jakob Stoklund Olesen2011-04-111-1/+9
| | | | | | This particularly helps with the initial transfer of fixed intervals. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@129277 91177308-0d34-0410-b5e6-96231b3b80d8
* Add tags to live interval unions to avoid using stale queries.Jakob Stoklund Olesen2011-02-091-0/+2
| | | | | | | The tag is updated whenever the live interval union is changed, and it is tested before using cached information. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@125224 91177308-0d34-0410-b5e6-96231b3b80d8
* Replace TargetRegisterInfo::printReg with a PrintReg class that also works ↵Jakob Stoklund Olesen2011-01-091-6/+5
| | | | | | | | | | without a TRI instance. Print virtual registers numbered from 0 instead of the arbitrary FirstVirtualRegister. The first virtual register is printed as %vreg0. TRI::NoRegister is printed as %noreg. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@123107 91177308-0d34-0410-b5e6-96231b3b80d8
* Avoid dereferencing end() in collectInterferingVRegs() when there is noJakob Stoklund Olesen2010-12-171-1/+1
| | | | | | interference. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@122108 91177308-0d34-0410-b5e6-96231b3b80d8
* Provide LiveIntervalUnion::Query::checkLoopInterference.Jakob Stoklund Olesen2010-12-171-0/+28
| | | | | | | | This is a three-way interval list intersection between a virtual register, a live interval union, and a loop. It will be used to identify interference-free loops for live range splitting. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@122034 91177308-0d34-0410-b5e6-96231b3b80d8
* Start using SplitKit and MachineLoopRanges in RegAllocGreedy in preparation ofJakob Stoklund Olesen2010-12-151-2/+2
| | | | | | | | live range splitting around loops guided by register pressure. So far, trySplit() simply prints a lot of debug output. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@121918 91177308-0d34-0410-b5e6-96231b3b80d8
* Add LiveIntervalUnion print methods, RegAllocGreedy::trySplit debug spew.Jakob Stoklund Olesen2010-12-141-3/+24
| | | | git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@121783 91177308-0d34-0410-b5e6-96231b3b80d8
* Use TRI::printReg instead of AbstractRegisterDescription when printingJakob Stoklund Olesen2010-12-141-13/+8
| | | | | | LiveIntervalUnions. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@121781 91177308-0d34-0410-b5e6-96231b3b80d8
* Add a forgotten initializer for CheckedFirstInterference.Jakob Stoklund Olesen2010-12-091-0/+2
| | | | git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@121410 91177308-0d34-0410-b5e6-96231b3b80d8
* Added register reassignment prototype to RAGreedy. It's a simpleAndrew Trick2010-12-091-1/+4
| | | | | | | | 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
* IntervalMap iterators are heavyweight, so avoid copying them around and useJakob Stoklund Olesen2010-12-091-3/+20
| | | | | | | | | | | references instead. Similarly, IntervalMap::begin() is almost as expensive as find(), so use find(x) instead of begin().advanceTo(x); This makes RegAllocBasic run another 5% faster. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@121344 91177308-0d34-0410-b5e6-96231b3b80d8
* Properly deal with empty intervals when checking for interference.Jakob Stoklund Olesen2010-12-081-1/+2
| | | | git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@121319 91177308-0d34-0410-b5e6-96231b3b80d8
* Switch LiveIntervalUnion from std::set to IntervalMap.Jakob Stoklund Olesen2010-12-071-127/+58
| | | | | | | 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
* Comment typo.Andrew Trick2010-11-301-1/+1
| | | | git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@120504 91177308-0d34-0410-b5e6-96231b3b80d8
* Coding style. No significant functionality. Abandon linear scan styleAndrew Trick2010-11-301-154/+178
| | | | | | | | | 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
* RABasic is nearly functionally complete. There are a few remainingAndrew Trick2010-11-101-1/+71
| | | | | | | | | | 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 Trick2010-11-091-5/+47
| | | | | | | (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 Trick2010-11-091-46/+5
| | | | git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@118613 91177308-0d34-0410-b5e6-96231b3b80d8
* Adds RABasic verification and tracing.Andrew Trick2010-11-091-5/+46
| | | | 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 Trick2010-11-081-41/+57
| | | | | | | | | | 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
* Remove the vector of live vregs. I thought we would need to trackAndrew Trick2010-10-261-5/+0
| | | | | | | | them, but hopefully we won't. And this is not the right data structure to do it anyway. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@117412 91177308-0d34-0410-b5e6-96231b3b80d8
* Jakob's review of the basic register allocator.Andrew Trick2010-10-261-14/+16
| | | | git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@117384 91177308-0d34-0410-b5e6-96231b3b80d8
* Fix a likely bug in an assertion by adding parentheses around '||'. This bugChandler Carruth2010-10-231-1/+1
| | | | | | | was found by a GCC warning. ;] git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@117199 91177308-0d34-0410-b5e6-96231b3b80d8
* This is a prototype of an experimental register allocationAndrew Trick2010-10-221-0/+167
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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