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* Silence unused variable warnings.Devang Patel2008-11-211-0/+1
| | | | git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@59841 91177308-0d34-0410-b5e6-96231b3b80d8
* Use find_first/find_next to iterate through all the set bits in aDan Gohman2008-11-131-4/+4
| | | | | | | BitVector, instead of manually testing each bit. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@59246 91177308-0d34-0410-b5e6-96231b3b80d8
* Switch the MachineOperand accessors back to the short names likeDan Gohman2008-10-031-2/+2
| | | | | | | isReg, etc., from isRegister, etc. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@57006 91177308-0d34-0410-b5e6-96231b3b80d8
* Factor out code into HandleVirtRegDef, for consistency withDan Gohman2008-09-211-13/+12
| | | | | | | | Handle{Virt,Phys}Reg{Def,Use}. Remove a redundant check for register zero, and redundant checks for isPhysicalRegister. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@56412 91177308-0d34-0410-b5e6-96231b3b80d8
* Use SmallSet instead of std::set to save allocations.Owen Anderson2008-08-141-3/+3
| | | | git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@54810 91177308-0d34-0410-b5e6-96231b3b80d8
* - Fix SelectionDAG to generate correct CFGs.Owen Anderson2008-08-041-0/+7
| | | | | | | | | - Add a basic machine-level dead block eliminator. These two have to go together, since many other parts of the code generator are unable to handle the unreachable blocks otherwise created. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@54333 91177308-0d34-0410-b5e6-96231b3b80d8
* - Remove calls to copyKillDeadInfo which is an N^2 function. Instead, ↵Evan Cheng2008-07-031-47/+0
| | | | | | | | | propagate kill / dead markers as new instructions are constructed in foldMemoryOperand, convertToThressAddress, etc. - Also remove LiveVariables::instructionChanged, etc. Replace all calls with cheaper calls which update VarInfo kill list. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@53097 91177308-0d34-0410-b5e6-96231b3b80d8
* Use std::replace instead of std::find and push_back.Evan Cheng2008-07-031-2/+1
| | | | git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@53063 91177308-0d34-0410-b5e6-96231b3b80d8
* - Add LiveVariables::replaceKillInstruction. This does a subset of ↵Evan Cheng2008-07-031-0/+9
| | | | | | | | | instructionChanged. That is, it only update the VarInfo.kills if the new instruction is known to have the correct dead and kill markers. - CommuteInstruction copies kill / dead markers over to new instruction. So use replaceKillInstruction instead. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@53061 91177308-0d34-0410-b5e6-96231b3b80d8
* Use a SmallSet when we can to reduce memory allocations.Owen Anderson2008-06-271-1/+2
| | | | | | | This speeds up a particular testcase from 0.0302s to 0.0222s in LiveVariables. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@52819 91177308-0d34-0410-b5e6-96231b3b80d8
* Fix the text in an assert string.Dan Gohman2008-06-251-1/+1
| | | | git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@52744 91177308-0d34-0410-b5e6-96231b3b80d8
* This situation can occur:Bill Wendling2008-06-231-2/+17
| | | | | | | | | | | | | | | | | | | | ,------. | | | v | t2 = phi ... t1 ... | | | v | t1 = ... | ... = ... t1 ... | | `------' where there is a use in a PHI node that's a predecessor to the defining block. We don't want to mark all predecessors as having the value "alive" in this case. Also, the assert was too restrictive and didn't handle this case. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@52655 91177308-0d34-0410-b5e6-96231b3b80d8
* Rewrite LiveVariable liveness computation. The new implementation is much ↵Evan Cheng2008-04-161-219/+239
| | | | | | | | | simplified. It eliminated the nasty recursive routines and removed the partial def / use bookkeeping. There is also potential for performance improvement by replacing the conservative handling of partial physical register definitions. The code is currently disabled until live interval analysis is taught of the name scheme. This patch also fixed a couple of nasty corner cases. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@49784 91177308-0d34-0410-b5e6-96231b3b80d8
* Now that I am told MachineRegisterInfo also tracks physical register uses / ↵Evan Cheng2008-04-021-24/+64
| | | | | | defs, I can do away with the horribleness I introduced a while back. It's impossible to detect if there is any use of a physical register below an instruction (and before any def of the register) with some cheap book keeping. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@49105 91177308-0d34-0410-b5e6-96231b3b80d8
* Fix live variables issues:Evan Cheng2008-03-191-6/+43
| | | | | | | | | | | | 1. If part of a register is re-defined, an implicit kill and an implicit def are added to denote read / mod / write. However, this should only be necessary if the register is actually read later. This is a performance issue. 2. If a sub-register is being defined, and it doesn't have a previous use, do not add a implicit kill to the last use of a super-register: = EAX, AX<imp-use,kill> ... AX = In this case, EAX is live but AX is killed, this is wrong and will cause the coalescer to do bad things. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@48521 91177308-0d34-0410-b5e6-96231b3b80d8
* Refactor code. Remove duplicated functions that basically do the same thing asEvan Cheng2008-03-051-70/+24
| | | | | | | findRegisterUseOperandIdx, findRegisterDefOperandIndx. Fix some naming inconsistencies. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@47927 91177308-0d34-0410-b5e6-96231b3b80d8
* Clear PhysRegPartUse for the sub register as well.Bill Wendling2008-02-211-1/+1
| | | | git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@47453 91177308-0d34-0410-b5e6-96231b3b80d8
* Remove one of the fixmes that I put in there. From Evan:Bill Wendling2008-02-201-2/+3
| | | | | | | | | No need to go up more levels. A def of a register also sets its sub-registers (so if PhysRegInfo[SuperReg] is NULL, it means SuperReg's super registers are not previously defined). git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@47399 91177308-0d34-0410-b5e6-96231b3b80d8
* Improve some comments explaining the "handle kills" stuff better.Bill Wendling2008-02-201-2/+4
| | | | git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@47395 91177308-0d34-0410-b5e6-96231b3b80d8
* Fix comment.Bill Wendling2008-02-201-2/+1
| | | | git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@47389 91177308-0d34-0410-b5e6-96231b3b80d8
* Added some comments and reformatted others. No functionality change.Bill Wendling2008-02-201-28/+43
| | | | | | | | Added two "FIXMEs" for code that looks dubious to me (but I could be wrong). git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@47366 91177308-0d34-0410-b5e6-96231b3b80d8
* More constification of things. More comments added. No functionalityBill Wendling2008-02-201-44/+76
| | | | | | | changes. (Sorry for any formatting changes that creeped in.) git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@47362 91177308-0d34-0410-b5e6-96231b3b80d8
* No functionality change:Bill Wendling2008-02-201-31/+42
| | | | | | | | - Constified some MachineOperand values. - Added/Modified some comments. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@47358 91177308-0d34-0410-b5e6-96231b3b80d8
* Rename MRegisterInfo to TargetRegisterInfo.Dan Gohman2008-02-101-19/+19
| | | | git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@46930 91177308-0d34-0410-b5e6-96231b3b80d8
* If a vr is already marked alive in a bb, then it has PHI uses that are ↵Evan Cheng2008-02-051-2/+3
| | | | | | visited earlier, then it is not killed in the def block (i.e. not dead). git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@46763 91177308-0d34-0410-b5e6-96231b3b80d8
* Move some functionality for adding flags to MachineInstr's into methods on ↵Owen Anderson2008-01-241-106/+14
| | | | | | MachineInstr rather than LiveVariables. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@46295 91177308-0d34-0410-b5e6-96231b3b80d8
* Move some calls to getVRegDef higher in the callgraph, so they don't get ↵Owen Anderson2008-01-151-11/+11
| | | | | | executed as frequently in performance sensitive code. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@46027 91177308-0d34-0410-b5e6-96231b3b80d8
* Remove DefInst from LiveVariables::VarInfo. Use the facilities on ↵Owen Anderson2008-01-151-27/+20
| | | | | | MachineRegisterInfo instead. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@46016 91177308-0d34-0410-b5e6-96231b3b80d8
* rename TargetInstrDescriptor -> TargetInstrDesc.Chris Lattner2008-01-071-1/+1
| | | | | | | | Make MachineInstr::getDesc return a reference instead of a pointer, since it can never be null. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@45695 91177308-0d34-0410-b5e6-96231b3b80d8
* Move a bunch more accessors from TargetInstrInfo to TargetInstrDescriptorChris Lattner2008-01-071-2/+1
| | | | git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@45680 91177308-0d34-0410-b5e6-96231b3b80d8
* Rename SSARegMap -> MachineRegisterInfo in keeping with the idea Chris Lattner2007-12-311-2/+4
| | | | | | | | | | | | | | | | that "machine" classes are used to represent the current state of the code being compiled. Given this expanded name, we can start moving other stuff into it. For now, move the UsedPhysRegs and LiveIn/LoveOuts vectors from MachineFunction into it. Update all the clients to match. This also reduces some needless #includes, such as MachineModuleInfo from MachineFunction. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@45467 91177308-0d34-0410-b5e6-96231b3b80d8
* Add new shorter predicates for testing machine operands for various types: Chris Lattner2007-12-301-1/+1
| | | | | | | | | | | | | | e.g. MO.isMBB() instead of MO.isMachineBasicBlock(). I don't plan on switching everything over, so new clients should just start using the shorter names. Remove old long accessors, switching everything over to use the short accessor: getMachineBasicBlock() -> getMBB(), getConstantPoolIndex() -> getIndex(), setMachineBasicBlock -> setMBB(), etc. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@45464 91177308-0d34-0410-b5e6-96231b3b80d8
* More cleanups for MachineOperand:Chris Lattner2007-12-301-6/+6
| | | | | | | | | | | - Eliminate the static "print" method for operands, moving it into MachineOperand::print. - Change various set* methods for register flags to take a bool for the value to set it to. Remove unset* methods. - Group methods more logically by operand flavor in MachineOperand.h git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@45461 91177308-0d34-0410-b5e6-96231b3b80d8
* Start using the simplified methods for adding operands.Chris Lattner2007-12-301-9/+15
| | | | git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@45432 91177308-0d34-0410-b5e6-96231b3b80d8
* Remove attribution from file headers, per discussion on llvmdev.Chris Lattner2007-12-291-2/+2
| | | | git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@45418 91177308-0d34-0410-b5e6-96231b3b80d8
* Live interval splitting:Evan Cheng2007-11-171-10/+39
| | | | | | | | | | | | | | | | | | | | When a live interval is being spilled, rather than creating short, non-spillable intervals for every def / use, split the interval at BB boundaries. That is, for every BB where the live interval is defined or used, create a new interval that covers all the defs and uses in the BB. This is designed to eliminate one common problem: multiple reloads of the same value in a single basic block. Note, it does *not* decrease the number of spills since no copies are inserted so the split intervals are *connected* through spill and reloads (or rematerialization). The newly created intervals can be spilled again, in that case, since it does not span multiple basic blocks, it's spilled in the usual manner. However, it can reuse the same stack slot as the previously split interval. This is currently controlled by -split-intervals-at-bb. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@44198 91177308-0d34-0410-b5e6-96231b3b80d8
* Bring UsedBlocks back. StrongPHIElimination needs this information.Owen Anderson2007-11-081-1/+8
| | | | git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@43866 91177308-0d34-0410-b5e6-96231b3b80d8
* Handle cases where a register and one of its super-register are both marked asEvan Cheng2007-11-051-2/+4
| | | | | | | defined on the same instruction. This fixes PR1767. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@43699 91177308-0d34-0410-b5e6-96231b3b80d8
* Remove isReg, isImm, and isMBB, and change all their users to use Dan Gohman2007-09-141-7/+7
| | | | | | | | isRegister, isImmediate, and isMachineBasicBlock, which are equivalent, and more popular. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@41958 91177308-0d34-0410-b5e6-96231b3b80d8
* Fixed a typo that's causing a missing kill marker.Evan Cheng2007-09-121-4/+3
| | | | git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@41893 91177308-0d34-0410-b5e6-96231b3b80d8
* Sometimes a MI can define a register as well as defining a super-register at theEvan Cheng2007-09-111-6/+7
| | | | | | | same time. Do not mark the "smaller" def as dead. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@41871 91177308-0d34-0410-b5e6-96231b3b80d8
* Bugs: missing partial uses and redundant partial defs.Evan Cheng2007-08-011-4/+20
| | | | git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@40688 91177308-0d34-0410-b5e6-96231b3b80d8
* Don't assume that only Uses can be kills. Defs are marked as kills initiallyDan Gohman2007-07-201-8/+6
| | | | | | | | | when there are no uses. This fixes a dangling-pointer bug, where pointers to deleted instructions were not removed from kills lists. More info here: http://lists.cs.uiuc.edu/pipermail/llvmdev/2007-July/009749.html git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@40131 91177308-0d34-0410-b5e6-96231b3b80d8
* It's not necessary to do rounding for alloca operations when the requestedDan Gohman2007-07-181-0/+643
alignment is equal to the stack alignment. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@40004 91177308-0d34-0410-b5e6-96231b3b80d8
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