llvm/clang/lib/CodeGen/CGCall.h

//===----- CGCall.h - Encapsulate calling convention details ----*- C++ -*-===//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===----------------------------------------------------------------------===//
//
// These classes wrap the information about a call or function
// definition used to handle ABI compliancy.
//
//===----------------------------------------------------------------------===//

#ifndef LLVM_CLANG_LIB_CODEGEN_CGCALL_H
#define LLVM_CLANG_LIB_CODEGEN_CGCALL_H

#include "CGPointerAuthInfo.h"
#include "CGValue.h"
#include "EHScopeStack.h"
#include "clang/AST/ASTFwd.h"
#include "clang/AST/CanonicalType.h"
#include "clang/AST/GlobalDecl.h"
#include "clang/AST/Type.h"
#include "llvm/ADT/STLForwardCompat.h"
#include "llvm/IR/Value.h"

namespace llvm {
class Type;
class Value;
} // namespace llvm

namespace clang {
class Decl;
class FunctionDecl;
class TargetOptions;
class VarDecl;

namespace CodeGen {

/// Abstract information about a function or function prototype.
class CGCalleeInfo { … };

/// All available information about a concrete callee.
class CGCallee { … };

struct CallArg { … };

/// CallArgList - Type for representing both the value and type of
/// arguments in a call.
class CallArgList : public SmallVector<CallArg, 8> { … };

/// 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 { … };

/// Adds attributes to \p F according to our \p CodeGenOpts and \p LangOpts, as
/// though we had emitted it ourselves. We remove any attributes on F that
/// conflict with the attributes we add here.
///
/// This is useful for adding attrs to bitcode modules that you want to link
/// with but don't control, such as CUDA's libdevice.  When linking with such
/// a bitcode library, you might want to set e.g. its functions'
/// "unsafe-fp-math" attribute to match the attr of the functions you're
/// codegen'ing.  Otherwise, LLVM will interpret the bitcode module's lack of
/// unsafe-fp-math attrs as tantamount to unsafe-fp-math=false, and then LLVM
/// will propagate unsafe-fp-math=false up to every transitive caller of a
/// function in the bitcode library!
///
/// With the exception of fast-math attrs, this will only make the attributes
/// on the function more conservative.  But it's unsafe to call this on a
/// function which relies on particular fast-math attributes for correctness.
/// It's up to you to ensure that this is safe.
void mergeDefaultFunctionDefinitionAttributes(llvm::Function &F,
                                              const CodeGenOptions &CodeGenOpts,
                                              const LangOptions &LangOpts,
                                              const TargetOptions &TargetOpts,
                                              bool WillInternalize);

enum class FnInfoOpts { … };

inline FnInfoOpts operator|(FnInfoOpts A, FnInfoOpts B) { … }

inline FnInfoOpts operator&(FnInfoOpts A, FnInfoOpts B) { … }

inline FnInfoOpts &operator|=(FnInfoOpts &A, FnInfoOpts B) { … }

inline FnInfoOpts &operator&=(FnInfoOpts &A, FnInfoOpts B) { … }

} // end namespace CodeGen
} // end namespace clang

#endif