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[proj] Add Projection::create{Addr,Value}Projection so one can create Projections without knowing what the internal state of the projection is.

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Swift SVN r23371
This commit is contained in:
Michael Gottesman
2014-11-17 17:52:16 +00:00
parent ebba297951
commit 2d703a28f5
5 changed files with 136 additions and 66 deletions
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34
include/swift/SIL/Projection.h
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@@ -19,6 +19,7 @@
#ifndef SWIFT_SIL_PROJECTION_H
#define SWIFT_SIL_PROJECTION_H
#include "swift/Basic/NullablePtr.h"
#include "swift/SIL/SILValue.h"
#include "swift/SIL/SILInstruction.h"
#include "llvm/ADT/PointerIntPair.h"
@@ -26,6 +27,8 @@
namespace swift {
class SILBuilder;
/// The kind of projection that we are representing.
enum class ProjectionKind : uint8_t {
Struct,
@@ -101,8 +104,15 @@ public:
/// projection equals this projection.
bool matchesValueProjection(SILInstruction *I) const;
/// Helper method that returns isAddrProjection(I->getKind());
static bool isAddrProjection(SILValue V) {
switch (V->getKind()) {
return isAddrProjection(V->getKind());
}
/// Returns true if K is a ValueKind that Projection recognizes as an address
/// projection.
static bool isAddrProjection(ValueKind K) {
switch (K) {
case ValueKind::StructElementAddrInst:
case ValueKind::TupleElementAddrInst:
case ValueKind::RefElementAddrInst:
@@ -113,8 +123,15 @@ public:
}
}
/// Helper method that returns isValueProjection(I->getKind());
static bool isValueProjection(SILValue V) {
switch (V->getKind()) {
return isValueProjection(V->getKind());
}
/// Returns true if this is K is a value kind that the projection class
/// recognizes as a value projection.
static bool isValueProjection(ValueKind K) {
switch (K) {
case ValueKind::StructExtractInst:
case ValueKind::TupleExtractInst:
case ValueKind::UncheckedEnumDataInst:
@@ -174,6 +191,19 @@ public:
}
}
/// If Base's type matches this Projections type ignoring Address vs Object
/// type differences and this Projection is representable as a value
/// projection, create the relevant value projection and return it. Otherwise,
/// return nullptr.
NullablePtr<SILInstruction>
createValueProjection(SILBuilder &B, SILLocation Loc, SILValue Base) const;
/// If Base's type matches this Projections type ignoring Address vs Object
/// type and this Projection is representable as an address projection, create
/// the relevant address projection and return it. Otherwise, return nullptr.
NullablePtr<SILInstruction>
createAddrProjection(SILBuilder &B, SILLocation Loc, SILValue Base) const;
private:
explicit Projection(StructElementAddrInst *SEA);
explicit Projection(TupleElementAddrInst *TEA);