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path: root/llvm/lib/CodeGen/DeadMachineInstructionElim.cpp
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* Remove VISIBILITY_HIDDEN from class/struct found inside anonymous namespaces.Nick Lewycky2009-10-251-2/+1
| | | | | | | Chris claims we should never have visibility_hidden inside any .cpp file but that's still not true even after this commit. llvm-svn: 85042
* Factor out LiveIntervalAnalysis' code to determine whether an instructionDan Gohman2009-10-091-1/+1
| | | | | | | | | | | | | | is trivially rematerializable and integrate it into TargetInstrInfo::isTriviallyReMaterializable. This way, all places that need to know whether an instruction is rematerializable will get the same answer. This enables the useful parts of the aggressive-remat option by default -- using AliasAnalysis to determine whether a memory location is invariant, and removes the questionable parts -- rematting operations with virtual register inputs that may not be live everywhere. llvm-svn: 83687
* Convert DOUT to DEBUG(errs()...).Bill Wendling2009-08-221-1/+2
| | | | llvm-svn: 79748
* Add const qualifiers.Dan Gohman2009-08-111-2/+2
| | | | llvm-svn: 78663
* Rename AliasSet to SubRegs, to reflect changes in the surrounding code.Dan Gohman2008-10-161-3/+3
| | | | llvm-svn: 57618
* Fix a subtle bug in DeadMachineInstructionElim's livenessDan Gohman2008-10-161-1/+4
| | | | | | | computation. A def of a register doesn't necessarily kill live super-registers. llvm-svn: 57614
* Switch the MachineOperand accessors back to the short names likeDan Gohman2008-10-031-3/+3
| | | | | | isReg, etc., from isRegister, etc. llvm-svn: 57006
* Add debug output to this pass.Dan Gohman2008-09-251-0/+2
| | | | llvm-svn: 56602
* Refactor the logic for testing if an instruction is dead into aDan Gohman2008-09-241-37/+48
| | | | | | separate method. llvm-svn: 56531
* Set SetStore to false, to allow this pass to deleteDan Gohman2008-09-241-1/+2
| | | | | | dead loads. llvm-svn: 56529
* Now that DeadMachineInstructionElim is basically workingDan Gohman2008-09-231-6/+0
| | | | | | | correctly, it's not necessary to explicitly remove registers from their use-def lists. llvm-svn: 56509
* Track local physical register liveness. This is not the mostDan Gohman2008-09-231-3/+53
| | | | | | | efficient implementation possible, but it's pretty simple and good enough for the time being. llvm-svn: 56504
* Don't consider instructions with implicit physical registerDan Gohman2008-09-181-1/+2
| | | | | | defs to be necessarily live. llvm-svn: 56310
* Add a new MachineInstr-level DCE pass. It is very simple, and is intended toDan Gohman2008-09-171-0/+99
be used with fast-isel. llvm-svn: 56268
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