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path: root/llvm/lib/CodeGen/RegAllocLinearScan.cpp
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* Add coalescing to register allocator. A hint is added to each intervalAlkis Evlogimenos2003-12-281-1/+12
| | | | | | | | | | | which denotes the register we would like to be assigned to (virtual or physical). In register allocation, if this hint exists and we can map it to a physical register (it is either a physical register or it is a virtual register that already got assigned to a physical one) we use that register if it is available instead of a random one in the free pool. llvm-svn: 10634
* Improve debugging output when choosing a register to spill.Alkis Evlogimenos2003-12-241-8/+3
| | | | llvm-svn: 10604
* Change the way free regusters are computed and perform betterAlkis Evlogimenos2003-12-231-130/+77
| | | | | | allocation in the presence of preallocated intervals. llvm-svn: 10595
* Remove verifyIntervals() since it doesn't actually work right now.Alkis Evlogimenos2003-12-211-52/+0
| | | | llvm-svn: 10570
* Change weight into a float so that we can take into account theAlkis Evlogimenos2003-12-211-10/+17
| | | | | | | | nesting level when computing it. Right now the allocator uses: w = sum_over_defs_uses( 10 ^ nesting level ); llvm-svn: 10569
* Add support for inactive intervals. This effectively reuses registersAlkis Evlogimenos2003-12-211-237/+323
| | | | | | for live ranges that fall into assigned registers' holes. llvm-svn: 10566
* Prune some #includesChris Lattner2003-12-181-3/+2
| | | | | | Add a statistic for # reloads llvm-svn: 10518
* Modify linear scan register allocator to use the two-addressAlkis Evlogimenos2003-12-181-76/+37
| | | | | | | instruction pass. This also fixes all remaining bugs for this new allocator to pass all tests under test/Programs. llvm-svn: 10515
* Fix bug in reserved registers. DH actually aliases DX and EDX whichAlkis Evlogimenos2003-12-181-2/+2
| | | | | | are not reserved registers. llvm-svn: 10514
* Rename LiveIntervals::expired() to LiveIntervals::expiredAt().Alkis Evlogimenos2003-12-181-1/+1
| | | | llvm-svn: 10511
* Change interface of MachineOperand as follows:Alkis Evlogimenos2003-12-141-7/+6
| | | | | | | | | | | | | | | a) remove opIsUse(), opIsDefOnly(), opIsDefAndUse() b) add isUse(), isDef() c) rename opHiBits32() to isHiBits32(), opLoBits32() to isLoBits32(), opHiBits64() to isHiBits64(), opLoBits64() to isLoBits64(). This results to much more readable code, for example compare "op.opIsDef() || op.opIsDefAndUse()" to "op.isDef()" a pattern used very often in the code. llvm-svn: 10461
* When reserving a preallocated register spill the aliases of thisAlkis Evlogimenos2003-12-131-0/+16
| | | | | | register too. llvm-svn: 10450
* Expire any active intervals left when register allocation is done.Alkis Evlogimenos2003-12-131-0/+12
| | | | llvm-svn: 10448
* Add instruction numbers to debugging output.Alkis Evlogimenos2003-12-131-1/+3
| | | | llvm-svn: 10447
* Fix bug in register spilling when a preallocated live range overlaps aAlkis Evlogimenos2003-12-051-13/+3
| | | | | | potential register assignment. llvm-svn: 10291
* Improve debugging output and clean up some code.Alkis Evlogimenos2003-12-041-17/+14
| | | | llvm-svn: 10288
* Print instructions before register allocation is performed. Also fixAlkis Evlogimenos2003-11-301-6/+26
| | | | | | | | bug where spill instructions were added to the next basic block instead of the end of the current one if the instruction that required the spill was the last in the block. llvm-svn: 10272
* Remove "numReloaded" statistic.Alkis Evlogimenos2003-11-301-2/+0
| | | | llvm-svn: 10268
* Merging the linear scan register allocator in trunk. It currently passes ↵Alkis Evlogimenos2003-11-201-0/+777
most tests under test/Programs/SingleSource/Benchmarks/Shootout so development will continue on trunk. The allocator is not enabled by default. You will need to pass -regallo=linearscan to lli or llc to use it. llvm-svn: 10103
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