//
//===----------------------------------------------------------------------===//
-#ifndef CLANG_CODEGEN_CGCALL_H
-#define CLANG_CODEGEN_CGCALL_H
-
-#include "llvm/ADT/FoldingSet.h"
-#include "llvm/Value.h"
-#include "clang/AST/Type.h"
-#include "clang/AST/CanonicalType.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"
// FIXME: Restructure so we don't have to expose so much stuff.
#include "ABIInfo.h"
namespace llvm {
- struct AttributeWithIndex;
+ class AttributeSet;
class Function;
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;
/// CallArgList - Type for representing both the value and type of
/// arguments in a call.
class CallArgList :
- public llvm::SmallVector<CallArg, 16> {
+ public SmallVector<CallArg, 16> {
public:
- struct Writeback {
- /// The original argument.
- llvm::Value *Address;
+ CallArgList() : StackBase(nullptr), StackBaseMem(nullptr) {}
- /// The pointee type of the original argument.
- QualType AddressType;
+ 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) {
other.Writebacks.begin(), other.Writebacks.end());
}
- void addWriteback(llvm::Value *address, QualType addressType,
- llvm::Value *temporary) {
+ void addWriteback(LValue srcLV, llvm::Value *temporary,
+ llvm::Value *toUse) {
Writeback writeback;
- writeback.Address = address;
- writeback.AddressType = addressType;
+ writeback.Source = srcLV;
writeback.Temporary = temporary;
+ writeback.ToUse = toUse;
Writebacks.push_back(writeback);
}
bool hasWritebacks() const { return !Writebacks.empty(); }
- typedef llvm::SmallVectorImpl<Writeback>::const_iterator writeback_iterator;
- writeback_iterator writeback_begin() const { return Writebacks.begin(); }
- writeback_iterator writeback_end() const { return Writebacks.end(); }
-
- private:
- llvm::SmallVector<Writeback, 1> Writebacks;
- };
-
- /// FunctionArgList - Type for representing both the decl and type
- /// of parameters to a function. The decl must be either a
- /// ParmVarDecl or ImplicitParamDecl.
- class FunctionArgList : public llvm::SmallVector<const VarDecl*, 16> {
- };
-
- /// CGFunctionInfo - Class to encapsulate the information about a
- /// function definition.
- class CGFunctionInfo : public llvm::FoldingSetNode {
- struct ArgInfo {
- CanQualType type;
- ABIArgInfo info;
- };
-
- /// The LLVM::CallingConv to use for this function (as specified by the
- /// user).
- unsigned CallingConvention;
-
- /// The LLVM::CallingConv to actually use for this function, which may
- /// depend on the ABI.
- unsigned EffectiveCallingConvention;
-
- /// Whether this function is noreturn.
- bool NoReturn;
-
- /// Whether this function is returns-retained.
- bool ReturnsRetained;
-
- unsigned NumArgs;
- ArgInfo *Args;
+ typedef llvm::iterator_range<SmallVectorImpl<Writeback>::const_iterator>
+ writeback_const_range;
- /// How many arguments to pass inreg.
- bool HasRegParm;
- unsigned RegParm;
-
- public:
- typedef const ArgInfo *const_arg_iterator;
- typedef ArgInfo *arg_iterator;
-
- CGFunctionInfo(unsigned CallingConvention, bool NoReturn,
- bool ReturnsRetained, bool HasRegParm, unsigned RegParm,
- CanQualType ResTy,
- const CanQualType *ArgTys, unsigned NumArgTys);
- ~CGFunctionInfo() { delete[] Args; }
+ writeback_const_range writebacks() const {
+ return writeback_const_range(Writebacks.begin(), Writebacks.end());
+ }
- const_arg_iterator arg_begin() const { return Args + 1; }
- const_arg_iterator arg_end() const { return Args + 1 + NumArgs; }
- arg_iterator arg_begin() { return Args + 1; }
- arg_iterator arg_end() { return Args + 1 + NumArgs; }
+ void addArgCleanupDeactivation(EHScopeStack::stable_iterator Cleanup,
+ llvm::Instruction *IsActiveIP) {
+ CallArgCleanup ArgCleanup;
+ ArgCleanup.Cleanup = Cleanup;
+ ArgCleanup.IsActiveIP = IsActiveIP;
+ CleanupsToDeactivate.push_back(ArgCleanup);
+ }
- unsigned arg_size() const { return NumArgs; }
+ ArrayRef<CallArgCleanup> getCleanupsToDeactivate() const {
+ return CleanupsToDeactivate;
+ }
- bool isNoReturn() const { return NoReturn; }
+ void allocateArgumentMemory(CodeGenFunction &CGF);
+ llvm::Instruction *getStackBase() const { return StackBase; }
+ void freeArgumentMemory(CodeGenFunction &CGF) const;
- /// In ARR, whether this function retains its return value. This
- /// is not always reliable for call sites.
- bool isReturnsRetained() const { return ReturnsRetained; }
+ /// \brief Returns if we're using an inalloca struct to pass arguments in
+ /// memory.
+ bool isUsingInAlloca() const { return StackBase; }
- /// getCallingConvention - Return the user specified calling
- /// convention.
- unsigned getCallingConvention() const { return CallingConvention; }
+ private:
+ SmallVector<Writeback, 1> Writebacks;
- /// getEffectiveCallingConvention - Return the actual calling convention to
- /// use, which may depend on the ABI.
- unsigned getEffectiveCallingConvention() const {
- return EffectiveCallingConvention;
- }
- void setEffectiveCallingConvention(unsigned Value) {
- EffectiveCallingConvention = Value;
- }
+ /// 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;
- bool getHasRegParm() const { return HasRegParm; }
- unsigned getRegParm() const { return RegParm; }
+ /// The stacksave call. It dominates all of the argument evaluation.
+ llvm::CallInst *StackBase;
- CanQualType getReturnType() const { return Args[0].type; }
+ /// The alloca holding the stackbase. We need it to maintain SSA form.
+ llvm::AllocaInst *StackBaseMem;
- ABIArgInfo &getReturnInfo() { return Args[0].info; }
- const ABIArgInfo &getReturnInfo() const { return Args[0].info; }
+ /// 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;
+ };
- void Profile(llvm::FoldingSetNodeID &ID) {
- ID.AddInteger(getCallingConvention());
- ID.AddBoolean(NoReturn);
- ID.AddBoolean(ReturnsRetained);
- ID.AddBoolean(HasRegParm);
- ID.AddInteger(RegParm);
- getReturnType().Profile(ID);
- for (arg_iterator it = arg_begin(), ie = arg_end(); it != ie; ++it)
- it->type.Profile(ID);
- }
- template<class Iterator>
- static void Profile(llvm::FoldingSetNodeID &ID,
- const FunctionType::ExtInfo &Info,
- CanQualType ResTy,
- Iterator begin,
- Iterator end) {
- ID.AddInteger(Info.getCC());
- ID.AddBoolean(Info.getNoReturn());
- ID.AddBoolean(Info.getProducesResult());
- ID.AddBoolean(Info.getHasRegParm());
- ID.AddInteger(Info.getRegParm());
- ResTy.Profile(ID);
- for (; begin != end; ++begin) {
- CanQualType T = *begin; // force iterator to be over canonical types
- T.Profile(ID);
- }
- }
+ /// FunctionArgList - Type for representing both the decl and type
+ /// of parameters to a function. The decl must be either a
+ /// ParmVarDecl or ImplicitParamDecl.
+ class FunctionArgList : public SmallVector<const VarDecl*, 16> {
};
-
+
/// ReturnValueSlot - Contains the address where the return value of a
/// function can be stored, and whether the address is volatile or not.
class ReturnValueSlot {
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