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Teach regular and fast isel to set dead flags on unused implicit defs

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on calls and similar instructions.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@106353 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Dan Gohman
2010-06-18 23:28:01 +00:00
parent 8af5ed9e15
commit db4971259c
7 changed files with 69 additions and 0 deletions
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5
include/llvm/CodeGen/MachineInstr.h
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@ -364,6 +364,11 @@ public:
void addRegisterDefined(unsigned IncomingReg,
const TargetRegisterInfo *RegInfo = 0);
/// setPhysRegsDeadExcept - Mark every physreg used by this instruction as dead
/// except those in the UsedRegs list.
void setPhysRegsDeadExcept(const SmallVectorImpl<unsigned> &UsedRegs,
const TargetRegisterInfo &TRI);
/// isSafeToMove - Return true if it is safe to move this instruction. If
/// SawStore is set to true, it means that there is a store (or call) between
/// the instruction's location and its intended destination.