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Calling memmove on a MachineOperand is totally safe.

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While it's not POD due to the user-defined constructor, it's still a trivially
copyable type. No functional change.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@230141 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Benjamin Kramer 2015-02-21 16:22:48 +00:00
parent 2b17108064
commit 7efcb3338c
1 changed files with 2 additions and 8 deletions
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10
lib/CodeGen/MachineInstr.cpp
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@ -674,14 +674,8 @@ static void moveOperands(MachineOperand *Dst, MachineOperand *Src,
if (MRI)
return MRI->moveOperands(Dst, Src, NumOps);
// Here it would be convenient to call memmove, so that isn't allowed because
// MachineOperand has a constructor and so isn't a POD type.
if (Dst < Src)
for (unsigned i = 0; i != NumOps; ++i)
new (Dst + i) MachineOperand(Src[i]);
else
for (unsigned i = NumOps; i ; --i)
new (Dst + i - 1) MachineOperand(Src[i - 1]);
// MachineOperand is a trivially copyable type so we can just use memmove.
std::memmove(Dst, Src, NumOps * sizeof(MachineOperand));
}
/// addOperand - Add the specified operand to the instruction. If it is an