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[diagnose-unreachable] Constant fold simple switch_enum_addr to elimi… #25998

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Merged
merged 1 commit into from
Jul 8, 2019
Merged

[diagnose-unreachable] Constant fold simple switch_enum_addr to elimi… #25998

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21 changes: 14 additions & 7 deletions include/swift/SIL/Projection.h
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Original file line number Diff line number Diff line change
Expand Up @@ -377,15 +377,15 @@ class Projection {

/// Returns true if this instruction projects from an address type to an
/// address subtype.
static SingleValueInstruction *isAddressProjection(SILValue V) {
switch (V->getKind()) {
static SingleValueInstruction *isAddressProjection(SILValue v) {
switch (v->getKind()) {
default:
return nullptr;
case ValueKind::IndexAddrInst: {
auto I = cast<IndexAddrInst>(V);
unsigned Scalar;
if (getIntegerIndex(I->getIndex(), Scalar))
return I;
auto *i = cast<IndexAddrInst>(v);
unsigned scalar;
if (getIntegerIndex(i->getIndex(), scalar))
return i;
return nullptr;
}
case ValueKind::StructElementAddrInst:
Expand All @@ -394,10 +394,17 @@ class Projection {
case ValueKind::ProjectBoxInst:
case ValueKind::TupleElementAddrInst:
case ValueKind::UncheckedTakeEnumDataAddrInst:
return cast<SingleValueInstruction>(V);
return cast<SingleValueInstruction>(v);
}
}

static SingleValueInstruction *isAddressProjection(SILInstruction *i) {
auto *svi = dyn_cast<SingleValueInstruction>(i);
if (!svi)
return nullptr;
return isAddressProjection(SILValue(svi));
}

/// Returns true if this instruction projects from an object type to an object
/// subtype.
static SingleValueInstruction *isObjectProjection(SILValue V) {
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