mirror of
https://github.com/llvm/llvm-project.git
synced 2025-04-28 17:06:07 +00:00
202ad47fe1
This broke in 23fbaff9a3fd2b26418e0c2f10b701049399251f, but the old .dyn_cast<> handled null.
121 lines
3.5 KiB
C++
121 lines
3.5 KiB
C++
//===--- Source.h - Source location provider for the VM --------*- 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
|
|
//
|
|
//===----------------------------------------------------------------------===//
|
|
//
|
|
// Defines a program which organises and links multiple bytecode functions.
|
|
//
|
|
//===----------------------------------------------------------------------===//
|
|
|
|
#ifndef LLVM_CLANG_AST_INTERP_SOURCE_H
|
|
#define LLVM_CLANG_AST_INTERP_SOURCE_H
|
|
|
|
#include "PrimType.h"
|
|
#include "clang/AST/DeclBase.h"
|
|
#include "clang/AST/Stmt.h"
|
|
#include "llvm/ADT/PointerUnion.h"
|
|
#include "llvm/Support/Endian.h"
|
|
|
|
namespace clang {
|
|
class Expr;
|
|
class SourceLocation;
|
|
class SourceRange;
|
|
namespace interp {
|
|
class Function;
|
|
|
|
/// Pointer into the code segment.
|
|
class CodePtr final {
|
|
public:
|
|
CodePtr() = default;
|
|
|
|
CodePtr &operator+=(int32_t Offset) {
|
|
Ptr += Offset;
|
|
return *this;
|
|
}
|
|
|
|
int32_t operator-(const CodePtr &RHS) const {
|
|
assert(Ptr != nullptr && RHS.Ptr != nullptr && "Invalid code pointer");
|
|
return Ptr - RHS.Ptr;
|
|
}
|
|
|
|
CodePtr operator-(size_t RHS) const {
|
|
assert(Ptr != nullptr && "Invalid code pointer");
|
|
return CodePtr(Ptr - RHS);
|
|
}
|
|
CodePtr operator+(ssize_t RHS) const {
|
|
assert(Ptr != nullptr && "Invalid code pointer");
|
|
return CodePtr(Ptr + RHS);
|
|
}
|
|
|
|
bool operator!=(const CodePtr &RHS) const { return Ptr != RHS.Ptr; }
|
|
const std::byte *operator*() const { return Ptr; }
|
|
explicit operator bool() const { return Ptr; }
|
|
bool operator<=(const CodePtr &RHS) const { return Ptr <= RHS.Ptr; }
|
|
bool operator>=(const CodePtr &RHS) const { return Ptr >= RHS.Ptr; }
|
|
|
|
/// Reads data and advances the pointer.
|
|
template <typename T> std::enable_if_t<!std::is_pointer<T>::value, T> read() {
|
|
assert(aligned(Ptr));
|
|
using namespace llvm::support;
|
|
T Value = endian::read<T, llvm::endianness::native>(Ptr);
|
|
Ptr += align(sizeof(T));
|
|
return Value;
|
|
}
|
|
|
|
private:
|
|
friend class Function;
|
|
/// Constructor used by Function to generate pointers.
|
|
CodePtr(const std::byte *Ptr) : Ptr(Ptr) {}
|
|
/// Pointer into the code owned by a function.
|
|
const std::byte *Ptr = nullptr;
|
|
};
|
|
|
|
/// Describes the statement/declaration an opcode was generated from.
|
|
class SourceInfo final {
|
|
public:
|
|
SourceInfo() {}
|
|
SourceInfo(const Stmt *E) : Source(E) {}
|
|
SourceInfo(const Decl *D) : Source(D) {}
|
|
|
|
SourceLocation getLoc() const;
|
|
SourceRange getRange() const;
|
|
|
|
const Stmt *asStmt() const {
|
|
return dyn_cast_if_present<const Stmt *>(Source);
|
|
}
|
|
const Decl *asDecl() const {
|
|
return dyn_cast_if_present<const Decl *>(Source);
|
|
}
|
|
const Expr *asExpr() const;
|
|
|
|
operator bool() const { return !Source.isNull(); }
|
|
|
|
private:
|
|
llvm::PointerUnion<const Decl *, const Stmt *> Source;
|
|
};
|
|
|
|
using SourceMap = std::vector<std::pair<unsigned, SourceInfo>>;
|
|
|
|
/// Interface for classes which map locations to sources.
|
|
class SourceMapper {
|
|
public:
|
|
virtual ~SourceMapper() {}
|
|
|
|
/// Returns source information for a given PC in a function.
|
|
virtual SourceInfo getSource(const Function *F, CodePtr PC) const = 0;
|
|
|
|
/// Returns the expression if an opcode belongs to one, null otherwise.
|
|
const Expr *getExpr(const Function *F, CodePtr PC) const;
|
|
/// Returns the location from which an opcode originates.
|
|
SourceLocation getLocation(const Function *F, CodePtr PC) const;
|
|
SourceRange getRange(const Function *F, CodePtr PC) const;
|
|
};
|
|
|
|
} // namespace interp
|
|
} // namespace clang
|
|
|
|
#endif
|