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109 lines
3.9 KiB
C++
109 lines
3.9 KiB
C++
//===--- SILArgument.h - SIL BasicBlock Argument Representation -*- C++ -*-===//
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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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#ifndef SWIFT_SIL_SILARGUMENT_H
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#define SWIFT_SIL_SILARGUMENT_H
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#include "swift/SIL/SILValue.h"
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#include "swift/SIL/SILFunction.h"
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namespace swift {
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class SILBasicBlock;
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class SILModule;
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class SILArgument : public ValueBase {
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void operator=(const SILArgument &) = delete;
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void operator delete(void *Ptr, size_t) = delete;
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SILBasicBlock *ParentBB;
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const ValueDecl *Decl;
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public:
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SILArgument(SILBasicBlock *ParentBB, SILType Ty, const ValueDecl *D=nullptr);
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SILArgument(SILBasicBlock *ParentBB, SILBasicBlock::bbarg_iterator Pos,
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SILType Ty, const ValueDecl *D=nullptr);
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/// getType() is ok since this is known to only have one type.
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SILType getType(unsigned i = 0) const { return ValueBase::getType(i); }
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SILBasicBlock *getParent() { return ParentBB; }
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const SILBasicBlock *getParent() const { return ParentBB; }
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SILFunction *getFunction();
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const SILFunction *getFunction() const;
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SILModule &getModule() const;
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const ValueDecl *getDecl() const { return Decl; }
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/// Returns true if this is a SILArgument of the entry BB of a function.
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bool isFunctionArg() const {
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return getParent()->isEntry();
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}
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static bool classof(const ValueBase *V) {
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return V->getKind() == ValueKind::SILArgument;
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}
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unsigned getIndex() const {
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ArrayRef<SILArgument *> Args = getParent()->getBBArgs();
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for (unsigned i = 0, e = Args.size(); i != e; ++i)
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if (Args[i] == this)
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return i;
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llvm_unreachable("SILArgument not argument of its parent BB");
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}
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/// Returns the SILParameterInfo for this SILArgument.
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SILParameterInfo getParameterInfo() const {
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assert(isFunctionArg() && "Only function arguments have SILParameterInfo");
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return getFunction()->getLoweredFunctionType()->getParameters()[getIndex()];
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}
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/// Returns the incoming SILValue from the \p BBIndex predecessor of this
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/// argument's parent BB. If the routine fails, it returns an empty SILValue.
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SILValue getIncomingValue(unsigned BBIndex);
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/// Returns the incoming SILValue for this argument from BB. If the routine
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/// fails, it returns an empty SILValue.
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SILValue getIncomingValue(SILBasicBlock *BB);
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/// Returns true if we were able to find incoming values for each predecessor
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/// of this arguments basic block. The found values are stored in OutArray.
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bool getIncomingValues(llvm::SmallVectorImpl<SILValue> &OutArray);
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/// Returns true if we were able to find incoming values for each predecessor
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/// of this arguments basic block. The found values are stored in OutArray.
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bool getIncomingValues(
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llvm::SmallVectorImpl<std::pair<SILBasicBlock *, SILValue>> &OutArray);
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/// Returns true if this SILArgument is the self argument of its
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/// function. This means that this will return false always for SILArguments
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/// of SILFunctions that do not have self argument and for non-function
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/// argument SILArguments.
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bool isSelf() const;
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/// Returns true if this SILArgument is passed via the given convention.
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bool hasConvention(ParameterConvention P) const {
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return getParameterInfo().getConvention() == P;
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}
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private:
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// A special constructor, only intended for use in SILBasicBlock::replaceBBArg.
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explicit SILArgument(SILType Ty, const ValueDecl *D =nullptr) :
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ValueBase(ValueKind::SILArgument, Ty), ParentBB(nullptr), Decl(D) {}
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friend class SILBasicBlock;
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void setParent(SILBasicBlock *P) { ParentBB = P; }
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};
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} // end swift namespace
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#endif
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