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ec86ae9d0e
Generalize a bunch of code that assumed address-of-value-type for the "this" side of properties to accept reftypes as well. Use RefElementAddrInst to extract physical elements of reference types. Fix an off-by-one in the writeback logic in emitStoreToLValue so that writeback chains properly terminate at the deepest value type component below a reference type component. Swift SVN r3445
103 lines
3.5 KiB
C++
103 lines
3.5 KiB
C++
//===--- SILFunction.cpp - Defines the SILFunction data structure ---------===//
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//
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// This source file is part of the Swift.org open source project
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//
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// Copyright (c) 2014 - 2015 Apple Inc. and the Swift project authors
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// Licensed under Apache License v2.0 with Runtime Library Exception
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//
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// See http://swift.org/LICENSE.txt for license information
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// See http://swift.org/CONTRIBUTORS.txt for the list of Swift project authors
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//
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//===----------------------------------------------------------------------===//
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#include "swift/SIL/Function.h"
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#include "swift/SIL/SILModule.h"
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#include "swift/SIL/SILConstant.h"
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#include "swift/AST/ASTContext.h"
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#include "swift/AST/Decl.h"
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#include "swift/AST/Expr.h"
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#include "swift/AST/Types.h"
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using namespace swift;
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Function::~Function() {
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}
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SILModule::SILModule(ASTContext &Context, bool hasTopLevel) :
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Context(Context), toplevel(nullptr) {
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if (hasTopLevel)
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toplevel = new (*this) Function(*this);
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}
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SILModule::~SILModule() {
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}
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SILConstant::SILConstant(SILConstant::Loc baseLoc) {
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if (ValueDecl *vd = baseLoc.dyn_cast<ValueDecl*>()) {
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// Explicit getters and setters have independent decls, but we also need
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// to reference implicit getters and setters. For consistency, generate
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// getter and setter constants as references to the parent decl.
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if (FuncDecl *fd = dyn_cast<FuncDecl>(vd)) {
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if (fd->isGetterOrSetter()) {
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if (Decl *getterFor = fd->getGetterDecl()) {
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loc = cast<ValueDecl>(getterFor);
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id = Getter;
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} else if (Decl *setterFor = fd->getSetterDecl()) {
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loc = cast<ValueDecl>(setterFor);
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id = Setter;
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} else {
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llvm_unreachable("no getter or setter decl?!");
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}
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return;
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}
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}
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}
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loc = baseLoc;
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id = 0;
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}
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static Type propertyThisType(Type thisType, ASTContext &C) {
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if (thisType->hasReferenceSemantics()) {
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return thisType;
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} else {
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return LValueType::get(thisType, LValueType::Qual::DefaultForType, C);
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}
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}
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Type SILConstant::getType() const {
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// FIXME: This should probably be a method on SILModule that caches the
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// type information.
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if (ValueDecl *vd = loc.dyn_cast<ValueDecl*>()) {
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ASTContext &C = vd->getASTContext();
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Type contextType = vd->getDeclContext()->getDeclaredTypeOfContext();
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Type propertyType;
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// If this is a property accessor, derive the property type.
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// FIXME: this is a dumb get-things-working kludge. we can get the getter/
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// setter types from somewhere else.
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if (id & SILConstant::Getter) {
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propertyType = FunctionType::get(TupleType::getEmpty(C),
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vd->getType(), C);
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}
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if (id & SILConstant::Setter) {
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TupleTypeElt valueParam(vd->getType(), C.getIdentifier("value"));
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propertyType = FunctionType::get(TupleType::get(valueParam, C),
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TupleType::getEmpty(C), C);
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}
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if (propertyType)
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return contextType
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? FunctionType::get(propertyThisType(contextType, C),
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propertyType, C)
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: propertyType;
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if (VarDecl *var = dyn_cast<VarDecl>(vd)) {
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// Global vars of type T are handled by () -> [byref] T functions.
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return FunctionType::get(TupleType::getEmpty(C),
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var->getTypeOfReference(), C);
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}
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return vd->getTypeOfReference();
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} else if (CapturingExpr *e = loc.dyn_cast<CapturingExpr*>()) {
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return e->getType();
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}
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llvm_unreachable("unexpected constant loc");
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} |