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path: root/lib/CodeGen/DeadMachineInstructionElim.cpp
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2009-10-25Remove includes of Support/Compiler.h that are no longer needed after theNick Lewycky
VISIBILITY_HIDDEN removal. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@85043 91177308-0d34-0410-b5e6-96231b3b80d8
2009-10-25Remove VISIBILITY_HIDDEN from class/struct found inside anonymous namespaces.Nick Lewycky
Chris claims we should never have visibility_hidden inside any .cpp file but that's still not true even after this commit. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@85042 91177308-0d34-0410-b5e6-96231b3b80d8
2009-10-09Factor out LiveIntervalAnalysis' code to determine whether an instructionDan Gohman
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. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@83687 91177308-0d34-0410-b5e6-96231b3b80d8
2009-08-22Convert DOUT to DEBUG(errs()...).Bill Wendling
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@79748 91177308-0d34-0410-b5e6-96231b3b80d8
2009-08-11Add const qualifiers.Dan Gohman
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@78663 91177308-0d34-0410-b5e6-96231b3b80d8
2008-10-16Rename AliasSet to SubRegs, to reflect changes in the surrounding code.Dan Gohman
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@57618 91177308-0d34-0410-b5e6-96231b3b80d8
2008-10-16Fix a subtle bug in DeadMachineInstructionElim's livenessDan Gohman
computation. A def of a register doesn't necessarily kill live super-registers. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@57614 91177308-0d34-0410-b5e6-96231b3b80d8
2008-10-03Switch the MachineOperand accessors back to the short names likeDan Gohman
isReg, etc., from isRegister, etc. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@57006 91177308-0d34-0410-b5e6-96231b3b80d8
2008-09-25Add debug output to this pass.Dan Gohman
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@56602 91177308-0d34-0410-b5e6-96231b3b80d8
2008-09-24Refactor the logic for testing if an instruction is dead into aDan Gohman
separate method. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@56531 91177308-0d34-0410-b5e6-96231b3b80d8
2008-09-24Set SetStore to false, to allow this pass to deleteDan Gohman
dead loads. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@56529 91177308-0d34-0410-b5e6-96231b3b80d8
2008-09-23Now that DeadMachineInstructionElim is basically workingDan Gohman
correctly, it's not necessary to explicitly remove registers from their use-def lists. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@56509 91177308-0d34-0410-b5e6-96231b3b80d8
2008-09-23Track local physical register liveness. This is not the mostDan Gohman
efficient implementation possible, but it's pretty simple and good enough for the time being. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@56504 91177308-0d34-0410-b5e6-96231b3b80d8
2008-09-18Don't consider instructions with implicit physical registerDan Gohman
defs to be necessarily live. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@56310 91177308-0d34-0410-b5e6-96231b3b80d8
2008-09-17Add a new MachineInstr-level DCE pass. It is very simple, and is intended toDan Gohman
be used with fast-isel. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@56268 91177308-0d34-0410-b5e6-96231b3b80d8
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