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The implied semantics are: - side-effects can occur any time before the first invocation. - all calls to the same global_init function have the same side-effects. - any operation that may observe the initializer's side-effects must be preceded by a call to the initializer. This is currently true if the function is an addressor that was lazily generated from a global variable access. Note that the initialization function itself does not need this attribute. It is private and only called within the addressor. Swift SVN r16683
116 lines
4.2 KiB
C++
116 lines
4.2 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/SILFunction.h"
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#include "swift/SIL/SILModule.h"
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// FIXME: For mapTypeInContext
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#include "swift/AST/ArchetypeBuilder.h"
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using namespace swift;
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SILFunction *SILFunction::create(SILModule &M, SILLinkage linkage,
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StringRef name,
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CanSILFunctionType loweredType,
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GenericParamList *contextGenericParams,
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Optional<SILLocation> loc,
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IsBare_t isBareSILFunction,
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IsTransparent_t isTrans,
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SILFunction *insertBefore,
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SILDebugScope *debugScope,
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DeclContext *DC) {
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// Get a StringMapEntry for the function. As a sop to error cases,
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// allow the name to have an empty string.
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llvm::StringMapEntry<SILFunction*> *entry = nullptr;
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if (!name.empty()) {
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entry = &M.FunctionTable.GetOrCreateValue(name);
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assert(!entry->getValue() && "function already exists");
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name = entry->getKey();
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}
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auto fn = new (M) SILFunction(M, linkage, name,
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loweredType, contextGenericParams, loc,
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isBareSILFunction, isTrans, insertBefore,
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debugScope, DC);
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if (entry) entry->setValue(fn);
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return fn;
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}
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SILFunction::SILFunction(SILModule &Module, SILLinkage Linkage,
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StringRef Name, CanSILFunctionType LoweredType,
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GenericParamList *contextGenericParams,
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Optional<SILLocation> Loc,
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IsBare_t isBareSILFunction,
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IsTransparent_t isTrans,
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SILFunction *InsertBefore,
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SILDebugScope *DebugScope,
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DeclContext *DC)
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: Module(Module),
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Name(Name),
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LoweredType(LoweredType),
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// FIXME: Context params should be independent of the function type.
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ContextGenericParams(contextGenericParams),
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Location(Loc),
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DeclCtx(DC),
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DebugScope(DebugScope),
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Bare(isBareSILFunction),
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Transparent(isTrans),
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GlobalInitFlag(false),
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Linkage(unsigned(Linkage)) {
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if (InsertBefore)
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Module.functions.insert(SILModule::iterator(InsertBefore), this);
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else
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Module.functions.push_back(this);
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}
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SILFunction::~SILFunction() {
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#ifndef NDEBUG
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// If the function is recursive, a function_ref inst inside of the function
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// will give the function a non-zero ref count triggering the assertion. Thus
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// we drop all instruction references before we erase.
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dropAllReferences();
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assert(RefCount == 0 &&
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"Function cannot be deleted while function_ref's still exist");
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#endif
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getModule().FunctionTable.erase(Name);
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}
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void SILFunction::setDeclContext(Decl *D) {
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if (!D)
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return;
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switch (D->getKind()) {
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// These four dual-inherit from DeclContext.
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case DeclKind::Func: DeclCtx = cast<FuncDecl>(D); break;
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case DeclKind::Constructor: DeclCtx = cast<ConstructorDecl>(D); break;
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case DeclKind::Extension: DeclCtx = cast<ExtensionDecl>(D); break;
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case DeclKind::Destructor: DeclCtx = cast<DestructorDecl>(D); break;
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default:
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DeclCtx = D->getDeclContext();
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}
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assert(DeclCtx);
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}
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void SILFunction::setDeclContext(Expr *E) {
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DeclCtx = dyn_cast_or_null<AbstractClosureExpr>(E);
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}
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ASTContext &SILFunction::getASTContext() const {
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return getModule().getASTContext();
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}
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Type SILFunction::mapTypeIntoContext(Type type) const {
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return ArchetypeBuilder::mapTypeIntoContext(getModule().getSwiftModule(),
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getContextGenericParams(),
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type);
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}
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