//
//===----------------------------------------------------------------------===//
-#ifndef CLANG_CODEGEN_CGCALL_H
-#define CLANG_CODEGEN_CGCALL_H
+#ifndef LLVM_CLANG_LIB_CODEGEN_CGCALL_H
+#define LLVM_CLANG_LIB_CODEGEN_CGCALL_H
+#include "CGValue.h"
+#include "EHScopeStack.h"
+#include "clang/AST/CanonicalType.h"
#include "clang/AST/Type.h"
+#include "llvm/ADT/FoldingSet.h"
+#include "llvm/IR/Value.h"
-#include "CGValue.h"
+// FIXME: Restructure so we don't have to expose so much stuff.
+#include "ABIInfo.h"
namespace llvm {
+ class AttributeSet;
class Function;
- struct AttributeWithIndex;
+ class Type;
class Value;
-
- template<typename T, unsigned> class SmallVector;
}
namespace clang {
class VarDecl;
namespace CodeGen {
- typedef llvm::SmallVector<llvm::AttributeWithIndex, 8> AttributeListType;
+ typedef SmallVector<llvm::AttributeSet, 8> AttributeListType;
+
+ struct CallArg {
+ RValue RV;
+ QualType Ty;
+ bool NeedsCopy;
+ CallArg(RValue rv, QualType ty, bool needscopy)
+ : RV(rv), Ty(ty), NeedsCopy(needscopy)
+ { }
+ };
/// CallArgList - Type for representing both the value and type of
/// arguments in a call.
- typedef llvm::SmallVector<std::pair<RValue, QualType>, 16> CallArgList;
+ class CallArgList :
+ public SmallVector<CallArg, 16> {
+ public:
+ CallArgList() : StackBase(nullptr), StackBaseMem(nullptr) {}
+
+ struct Writeback {
+ /// The original argument. Note that the argument l-value
+ /// is potentially null.
+ LValue Source;
+
+ /// The temporary alloca.
+ llvm::Value *Temporary;
+
+ /// A value to "use" after the writeback, or null.
+ llvm::Value *ToUse;
+ };
+
+ struct CallArgCleanup {
+ EHScopeStack::stable_iterator Cleanup;
+
+ /// The "is active" insertion point. This instruction is temporary and
+ /// will be removed after insertion.
+ llvm::Instruction *IsActiveIP;
+ };
+
+ void add(RValue rvalue, QualType type, bool needscopy = false) {
+ push_back(CallArg(rvalue, type, needscopy));
+ }
+
+ void addFrom(const CallArgList &other) {
+ insert(end(), other.begin(), other.end());
+ Writebacks.insert(Writebacks.end(),
+ other.Writebacks.begin(), other.Writebacks.end());
+ }
+
+ void addWriteback(LValue srcLV, llvm::Value *temporary,
+ llvm::Value *toUse) {
+ Writeback writeback;
+ writeback.Source = srcLV;
+ writeback.Temporary = temporary;
+ writeback.ToUse = toUse;
+ Writebacks.push_back(writeback);
+ }
+
+ bool hasWritebacks() const { return !Writebacks.empty(); }
+
+ typedef llvm::iterator_range<SmallVectorImpl<Writeback>::const_iterator>
+ writeback_const_range;
+
+ writeback_const_range writebacks() const {
+ return writeback_const_range(Writebacks.begin(), Writebacks.end());
+ }
+
+ void addArgCleanupDeactivation(EHScopeStack::stable_iterator Cleanup,
+ llvm::Instruction *IsActiveIP) {
+ CallArgCleanup ArgCleanup;
+ ArgCleanup.Cleanup = Cleanup;
+ ArgCleanup.IsActiveIP = IsActiveIP;
+ CleanupsToDeactivate.push_back(ArgCleanup);
+ }
+
+ ArrayRef<CallArgCleanup> getCleanupsToDeactivate() const {
+ return CleanupsToDeactivate;
+ }
+
+ void allocateArgumentMemory(CodeGenFunction &CGF);
+ llvm::Instruction *getStackBase() const { return StackBase; }
+ void freeArgumentMemory(CodeGenFunction &CGF) const;
+
+ /// \brief Returns if we're using an inalloca struct to pass arguments in
+ /// memory.
+ bool isUsingInAlloca() const { return StackBase; }
+
+ private:
+ SmallVector<Writeback, 1> Writebacks;
+
+ /// Deactivate these cleanups immediately before making the call. This
+ /// is used to cleanup objects that are owned by the callee once the call
+ /// occurs.
+ SmallVector<CallArgCleanup, 1> CleanupsToDeactivate;
+
+ /// The stacksave call. It dominates all of the argument evaluation.
+ llvm::CallInst *StackBase;
+
+ /// The alloca holding the stackbase. We need it to maintain SSA form.
+ llvm::AllocaInst *StackBaseMem;
+
+ /// The iterator pointing to the stack restore cleanup. We manually run and
+ /// deactivate this cleanup after the call in the unexceptional case because
+ /// it doesn't run in the normal order.
+ EHScopeStack::stable_iterator StackCleanup;
+ };
/// FunctionArgList - Type for representing both the decl and type
/// of parameters to a function. The decl must be either a
/// ParmVarDecl or ImplicitParamDecl.
- typedef llvm::SmallVector<std::pair<const VarDecl*, QualType>,
- 16> FunctionArgList;
-
- // FIXME: This should be a better iterator type so that we can avoid
- // construction of the ArgTypes smallvectors.
- typedef llvm::SmallVector<QualType, 16>::const_iterator ArgTypeIterator;
+ class FunctionArgList : public SmallVector<const VarDecl*, 16> {
+ };
- /// CGFunctionInfo - Class to encapsulate the information about a
- /// function definition.
- class CGFunctionInfo {
- llvm::SmallVector<QualType, 16> ArgTypes;
+ /// ReturnValueSlot - Contains the address where the return value of a
+ /// function can be stored, and whether the address is volatile or not.
+ class ReturnValueSlot {
+ llvm::PointerIntPair<llvm::Value *, 1, bool> Value;
public:
- CGFunctionInfo(const FunctionTypeNoProto *FTNP);
- CGFunctionInfo(const FunctionTypeProto *FTP);
- CGFunctionInfo(const FunctionDecl *FD);
- CGFunctionInfo(const ObjCMethodDecl *MD, const ASTContext &Context);
- CGFunctionInfo(QualType ResTy, const CallArgList &Args);
- CGFunctionInfo(QualType ResTy, const FunctionArgList &Args);
-
- ArgTypeIterator argtypes_begin() const;
- ArgTypeIterator argtypes_end() const;
+ ReturnValueSlot() {}
+ ReturnValueSlot(llvm::Value *Value, bool IsVolatile)
+ : Value(Value, IsVolatile) {}
- QualType getReturnType() const { return ArgTypes[0]; }
+ bool isNull() const { return !getValue(); }
+
+ bool isVolatile() const { return Value.getInt(); }
+ llvm::Value *getValue() const { return Value.getPointer(); }
};
+
} // end namespace CodeGen
} // end namespace clang
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