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misched: Add computeInstrLatency to TargetSchedModel.

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@165566 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Andrew Trick
2012-10-09 23:44:32 +00:00
parent c92d72abd0
commit c0dfffa448
2 changed files with 32 additions and 0 deletions
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8
include/llvm/CodeGen/TargetSchedule.h
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@@ -74,6 +74,14 @@ public:
const MachineInstr *UseMI, unsigned UseOperIdx,
bool FindMin) const;
/// \brief Compute the instruction latency based on the available machine
/// model.
///
/// Compute and return the expected latency of this instruction independent of
/// a particular use. computeOperandLatency is the prefered API, but this is
/// occasionally useful to help estimate instruction cost.
unsigned computeInstrLatency(const MachineInstr *MI) const;
/// \brief Identify the processor corresponding to the current subtarget.
unsigned getProcessorID() const { return SchedModel.getProcessorID(); }