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Clarify comments.

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@63851 91177308-0d34-0410-b5e6-96231b3b80d8
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Evan Cheng 2009-02-05 08:41:53 +00:00
parent 4798bbeaf5
commit 758d20f653
1 changed files with 4 additions and 3 deletions
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7
include/llvm/Target/TargetInstrDesc.h
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@ -407,9 +407,10 @@ public:
/// isAsCheapAsAMove - Returns true if this instruction has the same cost (or
/// less) than a move instruction. This is useful during certain types of
/// rematerializations (e.g., during two-address conversion) where we would
/// like to remat the instruction, but not if it costs more than moving the
/// instruction into the appropriate register.
/// optimizations (e.g., remat during two-address conversion or machine licm)
/// where we would like to remat or hoist the instruction, but not if it costs
/// more than moving the instruction into the appropriate register. Note, we
/// are not marking copies from and to the same register class with this flag.
bool isAsCheapAsAMove() const {
return Flags & (1 << TID::CheapAsAMove);
}