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[SIL] Add SILInstruction::mayHaveSideEffects helper.

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Swift SVN r6765
This commit is contained in:
Anna Zaks
2013-07-30 23:08:37 +00:00
parent cb60bda3bd
commit 930b95cdb0
2 changed files with 31 additions and 1 deletions
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24
lib/SIL/SILInstruction.cpp
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@@ -143,6 +143,30 @@ unsigned Operand::getOperandNumber() const {
return this - &cast<SILInstruction>(getUser())->getAllOperands()[0];
}
bool SILInstruction::mayHaveSideEffects() const {
switch (getKind()) {
default: return false;
case ValueKind::DeallocStackInst:
case ValueKind::DeallocRefInst:
case ValueKind::StoreInst:
case ValueKind::InitializeVarInst:
case ValueKind::CopyAddrInst:
case ValueKind::DestroyAddrInst:
case ValueKind::RetainInst:
case ValueKind::RetainAutoreleasedInst:
case ValueKind::ReleaseInst:
case ValueKind::WeakRetainInst:
case ValueKind::WeakReleaseInst:
case ValueKind::ApplyInst:
// FIXME: A lot of function calls should be known to have no side effects.
case ValueKind::PartialApplyInst:
case ValueKind::InitExistentialInst:
case ValueKind::UpcastExistentialInst:
case ValueKind::DeinitExistentialInst:
return true;
}
return false;
}
//===----------------------------------------------------------------------===//
// SILInstruction Subclasses