forked from OSchip/llvm-project
130 lines
4.0 KiB
C++
130 lines
4.0 KiB
C++
//===-------------------------- CodeRegion.h -------------------*- 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
|
|
//
|
|
//===----------------------------------------------------------------------===//
|
|
/// \file
|
|
///
|
|
/// This file implements class CodeRegion and CodeRegions.
|
|
///
|
|
/// A CodeRegion describes a region of assembly code guarded by special LLVM-MCA
|
|
/// comment directives.
|
|
///
|
|
/// # LLVM-MCA-BEGIN foo
|
|
/// ... ## asm
|
|
/// # LLVM-MCA-END
|
|
///
|
|
/// A comment starting with substring LLVM-MCA-BEGIN marks the beginning of a
|
|
/// new region of code.
|
|
/// A comment starting with substring LLVM-MCA-END marks the end of the
|
|
/// last-seen region of code.
|
|
///
|
|
/// Code regions are not allowed to overlap. Each region can have a optional
|
|
/// description; internally, regions are described by a range of source
|
|
/// locations (SMLoc objects).
|
|
///
|
|
/// An instruction (a MCInst) is added to a region R only if its location is in
|
|
/// range [R.RangeStart, R.RangeEnd].
|
|
//
|
|
//===----------------------------------------------------------------------===//
|
|
|
|
#ifndef LLVM_TOOLS_LLVM_MCA_CODEREGION_H
|
|
#define LLVM_TOOLS_LLVM_MCA_CODEREGION_H
|
|
|
|
#include "llvm/ADT/ArrayRef.h"
|
|
#include "llvm/ADT/StringRef.h"
|
|
#include "llvm/MC/MCInst.h"
|
|
#include "llvm/Support/SMLoc.h"
|
|
#include "llvm/Support/SourceMgr.h"
|
|
#include <vector>
|
|
|
|
namespace llvm {
|
|
namespace mca {
|
|
|
|
/// A region of assembly code.
|
|
///
|
|
/// It identifies a sequence of machine instructions.
|
|
class CodeRegion {
|
|
// An optional descriptor for this region.
|
|
llvm::StringRef Description;
|
|
// Instructions that form this region.
|
|
std::vector<llvm::MCInst> Instructions;
|
|
// Source location range.
|
|
llvm::SMLoc RangeStart;
|
|
llvm::SMLoc RangeEnd;
|
|
|
|
CodeRegion(const CodeRegion &) = delete;
|
|
CodeRegion &operator=(const CodeRegion &) = delete;
|
|
|
|
public:
|
|
CodeRegion(llvm::StringRef Desc, llvm::SMLoc Start)
|
|
: Description(Desc), RangeStart(Start), RangeEnd() {}
|
|
|
|
void addInstruction(const llvm::MCInst &Instruction) {
|
|
Instructions.emplace_back(Instruction);
|
|
}
|
|
|
|
llvm::SMLoc startLoc() const { return RangeStart; }
|
|
llvm::SMLoc endLoc() const { return RangeEnd; }
|
|
|
|
void setEndLocation(llvm::SMLoc End) { RangeEnd = End; }
|
|
bool empty() const { return Instructions.empty(); }
|
|
bool isLocInRange(llvm::SMLoc Loc) const;
|
|
|
|
llvm::ArrayRef<llvm::MCInst> getInstructions() const { return Instructions; }
|
|
|
|
llvm::StringRef getDescription() const { return Description; }
|
|
};
|
|
|
|
class CodeRegions {
|
|
// A source manager. Used by the tool to generate meaningful warnings.
|
|
llvm::SourceMgr &SM;
|
|
|
|
std::vector<std::unique_ptr<CodeRegion>> Regions;
|
|
|
|
// Construct a new region of code guarded by LLVM-MCA comments.
|
|
void addRegion(llvm::StringRef Description, llvm::SMLoc Loc) {
|
|
Regions.emplace_back(llvm::make_unique<CodeRegion>(Description, Loc));
|
|
}
|
|
|
|
CodeRegions(const CodeRegions &) = delete;
|
|
CodeRegions &operator=(const CodeRegions &) = delete;
|
|
|
|
public:
|
|
typedef std::vector<std::unique_ptr<CodeRegion>>::iterator iterator;
|
|
typedef std::vector<std::unique_ptr<CodeRegion>>::const_iterator
|
|
const_iterator;
|
|
|
|
iterator begin() { return Regions.begin(); }
|
|
iterator end() { return Regions.end(); }
|
|
const_iterator begin() const { return Regions.cbegin(); }
|
|
const_iterator end() const { return Regions.cend(); }
|
|
|
|
void beginRegion(llvm::StringRef Description, llvm::SMLoc Loc);
|
|
void endRegion(llvm::SMLoc Loc);
|
|
void addInstruction(const llvm::MCInst &Instruction);
|
|
llvm::SourceMgr &getSourceMgr() const { return SM; }
|
|
|
|
CodeRegions(llvm::SourceMgr &S) : SM(S) {
|
|
// Create a default region for the input code sequence.
|
|
addRegion("Default", llvm::SMLoc());
|
|
}
|
|
|
|
llvm::ArrayRef<llvm::MCInst> getInstructionSequence(unsigned Idx) const {
|
|
return Regions[Idx]->getInstructions();
|
|
}
|
|
|
|
bool empty() const {
|
|
return llvm::all_of(Regions, [](const std::unique_ptr<CodeRegion> &Region) {
|
|
return Region->empty();
|
|
});
|
|
}
|
|
};
|
|
|
|
} // namespace mca
|
|
} // namespace llvm
|
|
|
|
#endif
|