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[FileCheck] Move private interface to its own header

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Summary:
Most of the class definition in llvm/include/llvm/Support/FileCheck.h
are actually implementation details that should not be relied upon. This
commit moves all of it in a new header file under
llvm/lib/Support/FileCheck. It also takes advantage of the code movement
to put the code into a new llvm::filecheck namespace.

Reviewers: jhenderson, chandlerc, jdenny, probinson, grimar, arichardson, rnk

Subscribers: hiraditya, llvm-commits, probinson, dblaikie, grimar, arichardson, tra, rnk, kristina, hfinkel, rogfer01, JonChesterfield

Tags: #llvm

Differential Revision: https://reviews.llvm.org/D67649

llvm-svn: 373395
This commit is contained in:
Thomas Preud'homme 2019-10-01 21:37:55 +00:00
parent 8d077dcab1
commit 1cee06ed54
4 changed files with 629 additions and 594 deletions
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599
include/llvm/Support/FileCheck.h
View File

@ -13,14 +13,10 @@
#ifndef LLVM_SUPPORT_FILECHECK_H
#define LLVM_SUPPORT_FILECHECK_H
#include "llvm/ADT/Optional.h"
#include "llvm/ADT/StringMap.h"
#include "llvm/ADT/StringRef.h"
#include "llvm/Support/Error.h"
#include "llvm/Support/MemoryBuffer.h"
#include "llvm/Support/Regex.h"
#include "llvm/Support/SourceMgr.h"
#include <map>
#include <string>
#include <vector>
@ -41,216 +37,7 @@ struct FileCheckRequest {
};
//===----------------------------------------------------------------------===//
// Numeric substitution handling code.
//===----------------------------------------------------------------------===//
/// Base class representing the AST of a given expression.
class FileCheckExpressionAST {
public:
virtual ~FileCheckExpressionAST() = default;
/// Evaluates and \returns the value of the expression represented by this
/// AST or an error if evaluation fails.
virtual Expected<uint64_t> eval() const = 0;
};
/// Class representing an unsigned literal in the AST of an expression.
class FileCheckExpressionLiteral : public FileCheckExpressionAST {
private:
/// Actual value of the literal.
uint64_t Value;
public:
/// Constructs a literal with the specified value.
FileCheckExpressionLiteral(uint64_t Val) : Value(Val) {}
/// \returns the literal's value.
Expected<uint64_t> eval() const { return Value; }
};
/// Class to represent an undefined variable error, which quotes that
/// variable's name when printed.
class FileCheckUndefVarError : public ErrorInfo<FileCheckUndefVarError> {
private:
StringRef VarName;
public:
static char ID;
FileCheckUndefVarError(StringRef VarName) : VarName(VarName) {}
StringRef getVarName() const { return VarName; }
std::error_code convertToErrorCode() const override {
return inconvertibleErrorCode();
}
/// Print name of variable associated with this error.
void log(raw_ostream &OS) const override {
OS << "\"";
OS.write_escaped(VarName) << "\"";
}
};
/// Class representing a numeric variable and its associated current value.
class FileCheckNumericVariable {
private:
/// Name of the numeric variable.
StringRef Name;
/// Value of numeric variable, if defined, or None otherwise.
Optional<uint64_t> Value;
/// Line number where this variable is defined, or None if defined before
/// input is parsed. Used to determine whether a variable is defined on the
/// same line as a given use.
Optional<size_t> DefLineNumber;
public:
/// Constructor for a variable \p Name defined at line \p DefLineNumber or
/// defined before input is parsed if \p DefLineNumber is None.
explicit FileCheckNumericVariable(StringRef Name,
Optional<size_t> DefLineNumber = None)
: Name(Name), DefLineNumber(DefLineNumber) {}
/// \returns name of this numeric variable.
StringRef getName() const { return Name; }
/// \returns this variable's value.
Optional<uint64_t> getValue() const { return Value; }
/// Sets value of this numeric variable to \p NewValue.
void setValue(uint64_t NewValue) { Value = NewValue; }
/// Clears value of this numeric variable, regardless of whether it is
/// currently defined or not.
void clearValue() { Value = None; }
/// \returns the line number where this variable is defined, if any, or None
/// if defined before input is parsed.
Optional<size_t> getDefLineNumber() { return DefLineNumber; }
};
/// Class representing the use of a numeric variable in the AST of an
/// expression.
class FileCheckNumericVariableUse : public FileCheckExpressionAST {
private:
/// Name of the numeric variable.
StringRef Name;
/// Pointer to the class instance for the variable this use is about.
FileCheckNumericVariable *NumericVariable;
public:
FileCheckNumericVariableUse(StringRef Name,
FileCheckNumericVariable *NumericVariable)
: Name(Name), NumericVariable(NumericVariable) {}
/// \returns the value of the variable referenced by this instance.
Expected<uint64_t> eval() const;
};
/// Type of functions evaluating a given binary operation.
using binop_eval_t = uint64_t (*)(uint64_t, uint64_t);
/// Class representing a single binary operation in the AST of an expression.
class FileCheckASTBinop : public FileCheckExpressionAST {
private:
/// Left operand.
std::unique_ptr<FileCheckExpressionAST> LeftOperand;
/// Right operand.
std::unique_ptr<FileCheckExpressionAST> RightOperand;
/// Pointer to function that can evaluate this binary operation.
binop_eval_t EvalBinop;
public:
FileCheckASTBinop(binop_eval_t EvalBinop,
std::unique_ptr<FileCheckExpressionAST> LeftOp,
std::unique_ptr<FileCheckExpressionAST> RightOp)
: EvalBinop(EvalBinop) {
LeftOperand = std::move(LeftOp);
RightOperand = std::move(RightOp);
}
/// Evaluates the value of the binary operation represented by this AST,
/// using EvalBinop on the result of recursively evaluating the operands.
/// \returns the expression value or an error if an undefined numeric
/// variable is used in one of the operands.
Expected<uint64_t> eval() const;
};
class FileCheckPatternContext;
/// Class representing a substitution to perform in the RegExStr string.
class FileCheckSubstitution {
protected:
/// Pointer to a class instance holding, among other things, the table with
/// the values of live string variables at the start of any given CHECK line.
/// Used for substituting string variables with the text they were defined
/// as. Expressions are linked to the numeric variables they use at
/// parse time and directly access the value of the numeric variable to
/// evaluate their value.
FileCheckPatternContext *Context;
/// The string that needs to be substituted for something else. For a
/// string variable this is its name, otherwise this is the whole expression.
StringRef FromStr;
// Index in RegExStr of where to do the substitution.
size_t InsertIdx;
public:
FileCheckSubstitution(FileCheckPatternContext *Context, StringRef VarName,
size_t InsertIdx)
: Context(Context), FromStr(VarName), InsertIdx(InsertIdx) {}
virtual ~FileCheckSubstitution() = default;
/// \returns the string to be substituted for something else.
StringRef getFromString() const { return FromStr; }
/// \returns the index where the substitution is to be performed in RegExStr.
size_t getIndex() const { return InsertIdx; }
/// \returns a string containing the result of the substitution represented
/// by this class instance or an error if substitution failed.
virtual Expected<std::string> getResult() const = 0;
};
class FileCheckStringSubstitution : public FileCheckSubstitution {
public:
FileCheckStringSubstitution(FileCheckPatternContext *Context,
StringRef VarName, size_t InsertIdx)
: FileCheckSubstitution(Context, VarName, InsertIdx) {}
/// \returns the text that the string variable in this substitution matched
/// when defined, or an error if the variable is undefined.
Expected<std::string> getResult() const override;
};
class FileCheckNumericSubstitution : public FileCheckSubstitution {
private:
/// Pointer to the class representing the expression whose value is to be
/// substituted.
std::unique_ptr<FileCheckExpressionAST> ExpressionAST;
public:
FileCheckNumericSubstitution(FileCheckPatternContext *Context, StringRef Expr,
std::unique_ptr<FileCheckExpressionAST> ExprAST,
size_t InsertIdx)
: FileCheckSubstitution(Context, Expr, InsertIdx) {
ExpressionAST = std::move(ExprAST);
}
/// \returns a string containing the result of evaluating the expression in
/// this substitution, or an error if evaluation failed.
Expected<std::string> getResult() const override;
};
//===----------------------------------------------------------------------===//
// Pattern handling code.
// Summary of a FileCheck diagnostic.
//===----------------------------------------------------------------------===//
namespace Check {
@ -294,340 +81,6 @@ public:
};
} // namespace Check
struct FileCheckDiag;
/// Class holding the FileCheckPattern global state, shared by all patterns:
/// tables holding values of variables and whether they are defined or not at
/// any given time in the matching process.
class FileCheckPatternContext {
friend class FileCheckPattern;
private:
/// When matching a given pattern, this holds the value of all the string
/// variables defined in previous patterns. In a pattern, only the last
/// definition for a given variable is recorded in this table.
/// Back-references are used for uses after any the other definition.
StringMap<StringRef> GlobalVariableTable;
/// Map of all string variables defined so far. Used at parse time to detect
/// a name conflict between a numeric variable and a string variable when
/// the former is defined on a later line than the latter.
StringMap<bool> DefinedVariableTable;
/// When matching a given pattern, this holds the pointers to the classes
/// representing the numeric variables defined in previous patterns. When
/// matching a pattern all definitions for that pattern are recorded in the
/// NumericVariableDefs table in the FileCheckPattern instance of that
/// pattern.
StringMap<FileCheckNumericVariable *> GlobalNumericVariableTable;
/// Pointer to the class instance representing the @LINE pseudo variable for
/// easily updating its value.
FileCheckNumericVariable *LineVariable = nullptr;
/// Vector holding pointers to all parsed numeric variables. Used to
/// automatically free them once they are guaranteed to no longer be used.
std::vector<std::unique_ptr<FileCheckNumericVariable>> NumericVariables;
/// Vector holding pointers to all substitutions. Used to automatically free
/// them once they are guaranteed to no longer be used.
std::vector<std::unique_ptr<FileCheckSubstitution>> Substitutions;
public:
/// \returns the value of string variable \p VarName or an error if no such
/// variable has been defined.
Expected<StringRef> getPatternVarValue(StringRef VarName);
/// Defines string and numeric variables from definitions given on the
/// command line, passed as a vector of [#]VAR=VAL strings in
/// \p CmdlineDefines. \returns an error list containing diagnostics against
/// \p SM for all definition parsing failures, if any, or Success otherwise.
Error defineCmdlineVariables(std::vector<std::string> &CmdlineDefines,
SourceMgr &SM);
/// Create @LINE pseudo variable. Value is set when pattern are being
/// matched.
void createLineVariable();
/// Undefines local variables (variables whose name does not start with a '$'
/// sign), i.e. removes them from GlobalVariableTable and from
/// GlobalNumericVariableTable and also clears the value of numeric
/// variables.
void clearLocalVars();
private:
/// Makes a new numeric variable and registers it for destruction when the
/// context is destroyed.
template <class... Types>
FileCheckNumericVariable *makeNumericVariable(Types... args);
/// Makes a new string substitution and registers it for destruction when the
/// context is destroyed.
FileCheckSubstitution *makeStringSubstitution(StringRef VarName,
size_t InsertIdx);
/// Makes a new numeric substitution and registers it for destruction when
/// the context is destroyed.
FileCheckSubstitution *
makeNumericSubstitution(StringRef ExpressionStr,
std::unique_ptr<FileCheckExpressionAST> ExpressionAST,
size_t InsertIdx);
};
/// Class to represent an error holding a diagnostic with location information
/// used when printing it.
class FileCheckErrorDiagnostic : public ErrorInfo<FileCheckErrorDiagnostic> {
private:
SMDiagnostic Diagnostic;
public:
static char ID;
FileCheckErrorDiagnostic(SMDiagnostic &&Diag) : Diagnostic(Diag) {}
std::error_code convertToErrorCode() const override {
return inconvertibleErrorCode();
}
/// Print diagnostic associated with this error when printing the error.
void log(raw_ostream &OS) const override { Diagnostic.print(nullptr, OS); }
static Error get(const SourceMgr &SM, SMLoc Loc, const Twine &ErrMsg) {
return make_error<FileCheckErrorDiagnostic>(
SM.GetMessage(Loc, SourceMgr::DK_Error, ErrMsg));
}
static Error get(const SourceMgr &SM, StringRef Buffer, const Twine &ErrMsg) {
return get(SM, SMLoc::getFromPointer(Buffer.data()), ErrMsg);
}
};
class FileCheckNotFoundError : public ErrorInfo<FileCheckNotFoundError> {
public:
static char ID;
std::error_code convertToErrorCode() const override {
return inconvertibleErrorCode();
}
/// Print diagnostic associated with this error when printing the error.
void log(raw_ostream &OS) const override {
OS << "String not found in input";
}
};
class FileCheckPattern {
SMLoc PatternLoc;
/// A fixed string to match as the pattern or empty if this pattern requires
/// a regex match.
StringRef FixedStr;
/// A regex string to match as the pattern or empty if this pattern requires
/// a fixed string to match.
std::string RegExStr;
/// Entries in this vector represent a substitution of a string variable or
/// an expression in the RegExStr regex at match time. For example, in the
/// case of a CHECK directive with the pattern "foo[[bar]]baz[[#N+1]]",
/// RegExStr will contain "foobaz" and we'll get two entries in this vector
/// that tells us to insert the value of string variable "bar" at offset 3
/// and the value of expression "N+1" at offset 6.
std::vector<FileCheckSubstitution *> Substitutions;
/// Maps names of string variables defined in a pattern to the number of
/// their parenthesis group in RegExStr capturing their last definition.
///
/// E.g. for the pattern "foo[[bar:.*]]baz([[bar]][[QUUX]][[bar:.*]])",
/// RegExStr will be "foo(.*)baz(\1<quux value>(.*))" where <quux value> is
/// the value captured for QUUX on the earlier line where it was defined, and
/// VariableDefs will map "bar" to the third parenthesis group which captures
/// the second definition of "bar".
///
/// Note: uses std::map rather than StringMap to be able to get the key when
/// iterating over values.
std::map<StringRef, unsigned> VariableDefs;
/// Structure representing the definition of a numeric variable in a pattern.
/// It holds the pointer to the class representing the numeric variable whose
/// value is being defined and the number of the parenthesis group in
/// RegExStr to capture that value.
struct FileCheckNumericVariableMatch {
/// Pointer to class representing the numeric variable whose value is being
/// defined.
FileCheckNumericVariable *DefinedNumericVariable;
/// Number of the parenthesis group in RegExStr that captures the value of
/// this numeric variable definition.
unsigned CaptureParenGroup;
};
/// Holds the number of the parenthesis group in RegExStr and pointer to the
/// corresponding FileCheckNumericVariable class instance of all numeric
/// variable definitions. Used to set the matched value of all those
/// variables.
StringMap<FileCheckNumericVariableMatch> NumericVariableDefs;
/// Pointer to a class instance holding the global state shared by all
/// patterns:
/// - separate tables with the values of live string and numeric variables
/// respectively at the start of any given CHECK line;
/// - table holding whether a string variable has been defined at any given
/// point during the parsing phase.
FileCheckPatternContext *Context;
Check::FileCheckType CheckTy;
/// Line number for this CHECK pattern or None if it is an implicit pattern.
/// Used to determine whether a variable definition is made on an earlier
/// line to the one with this CHECK.
Optional<size_t> LineNumber;
public:
FileCheckPattern(Check::FileCheckType Ty, FileCheckPatternContext *Context,
Optional<size_t> Line = None)
: Context(Context), CheckTy(Ty), LineNumber(Line) {}
/// \returns the location in source code.
SMLoc getLoc() const { return PatternLoc; }
/// \returns the pointer to the global state for all patterns in this
/// FileCheck instance.
FileCheckPatternContext *getContext() const { return Context; }
/// \returns whether \p C is a valid first character for a variable name.
static bool isValidVarNameStart(char C);
/// Parsing information about a variable.
struct VariableProperties {
StringRef Name;
bool IsPseudo;
};
/// Parses the string at the start of \p Str for a variable name. \returns
/// a VariableProperties structure holding the variable name and whether it
/// is the name of a pseudo variable, or an error holding a diagnostic
/// against \p SM if parsing fail. If parsing was successful, also strips
/// \p Str from the variable name.
static Expected<VariableProperties> parseVariable(StringRef &Str,
const SourceMgr &SM);
/// Parses \p Expr for a numeric substitution block at line \p LineNumber,
/// or before input is parsed if \p LineNumber is None. Parameter
/// \p IsLegacyLineExpr indicates whether \p Expr should be a legacy @LINE
/// expression and \p Context points to the class instance holding the live
/// string and numeric variables. \returns a pointer to the class instance
/// representing the AST of the expression whose value must be substitued, or
/// an error holding a diagnostic against \p SM if parsing fails. If
/// substitution was successful, sets \p DefinedNumericVariable to point to
/// the class representing the numeric variable defined in this numeric
/// substitution block, or None if this block does not define any variable.
static Expected<std::unique_ptr<FileCheckExpressionAST>>
parseNumericSubstitutionBlock(
StringRef Expr,
Optional<FileCheckNumericVariable *> &DefinedNumericVariable,
bool IsLegacyLineExpr, Optional<size_t> LineNumber,
FileCheckPatternContext *Context, const SourceMgr &SM);
/// Parses the pattern in \p PatternStr and initializes this FileCheckPattern
/// instance accordingly.
///
/// \p Prefix provides which prefix is being matched, \p Req describes the
/// global options that influence the parsing such as whitespace
/// canonicalization, \p SM provides the SourceMgr used for error reports.
/// \returns true in case of an error, false otherwise.
bool parsePattern(StringRef PatternStr, StringRef Prefix, SourceMgr &SM,
const FileCheckRequest &Req);
/// Matches the pattern string against the input buffer \p Buffer
///
/// \returns the position that is matched or an error indicating why matching
/// failed. If there is a match, updates \p MatchLen with the size of the
/// matched string.
///
/// The GlobalVariableTable StringMap in the FileCheckPatternContext class
/// instance provides the current values of FileCheck string variables and
/// is updated if this match defines new values. Likewise, the
/// GlobalNumericVariableTable StringMap in the same class provides the
/// current values of FileCheck numeric variables and is updated if this
/// match defines new numeric values.
Expected<size_t> match(StringRef Buffer, size_t &MatchLen,
const SourceMgr &SM) const;
/// Prints the value of successful substitutions or the name of the undefined
/// string or numeric variables preventing a successful substitution.
void printSubstitutions(const SourceMgr &SM, StringRef Buffer,
SMRange MatchRange = None) const;
void printFuzzyMatch(const SourceMgr &SM, StringRef Buffer,
std::vector<FileCheckDiag> *Diags) const;
bool hasVariable() const {
return !(Substitutions.empty() && VariableDefs.empty());
}
Check::FileCheckType getCheckTy() const { return CheckTy; }
int getCount() const { return CheckTy.getCount(); }
private:
bool AddRegExToRegEx(StringRef RS, unsigned &CurParen, SourceMgr &SM);
void AddBackrefToRegEx(unsigned BackrefNum);
/// Computes an arbitrary estimate for the quality of matching this pattern
/// at the start of \p Buffer; a distance of zero should correspond to a
/// perfect match.
unsigned computeMatchDistance(StringRef Buffer) const;
/// Finds the closing sequence of a regex variable usage or definition.
///
/// \p Str has to point in the beginning of the definition (right after the
/// opening sequence). \p SM holds the SourceMgr used for error repporting.
/// \returns the offset of the closing sequence within Str, or npos if it
/// was not found.
size_t FindRegexVarEnd(StringRef Str, SourceMgr &SM);
/// Parses \p Expr for the name of a numeric variable to be defined at line
/// \p LineNumber, or before input is parsed if \p LineNumber is None.
/// \returns a pointer to the class instance representing that variable,
/// creating it if needed, or an error holding a diagnostic against \p SM
/// should defining such a variable be invalid.
static Expected<FileCheckNumericVariable *> parseNumericVariableDefinition(
StringRef &Expr, FileCheckPatternContext *Context,
Optional<size_t> LineNumber, const SourceMgr &SM);
/// Parses \p Name as a (pseudo if \p IsPseudo is true) numeric variable use
/// at line \p LineNumber, or before input is parsed if \p LineNumber is
/// None. Parameter \p Context points to the class instance holding the live
/// string and numeric variables. \returns the pointer to the class instance
/// representing that variable if successful, or an error holding a
/// diagnostic against \p SM otherwise.
static Expected<std::unique_ptr<FileCheckNumericVariableUse>>
parseNumericVariableUse(StringRef Name, bool IsPseudo,
Optional<size_t> LineNumber,
FileCheckPatternContext *Context,
const SourceMgr &SM);
enum class AllowedOperand { LineVar, Literal, Any };
/// Parses \p Expr for use of a numeric operand at line \p LineNumber, or
/// before input is parsed if \p LineNumber is None. Accepts both literal
/// values and numeric variables, depending on the value of \p AO. Parameter
/// \p Context points to the class instance holding the live string and
/// numeric variables. \returns the class representing that operand in the
/// AST of the expression or an error holding a diagnostic against \p SM
/// otherwise.
static Expected<std::unique_ptr<FileCheckExpressionAST>>
parseNumericOperand(StringRef &Expr, AllowedOperand AO,
Optional<size_t> LineNumber,
FileCheckPatternContext *Context, const SourceMgr &SM);
/// Parses \p Expr for a binary operation at line \p LineNumber, or before
/// input is parsed if \p LineNumber is None. The left operand of this binary
/// operation is given in \p LeftOp and \p IsLegacyLineExpr indicates whether
/// we are parsing a legacy @LINE expression. Parameter \p Context points to
/// the class instance holding the live string and numeric variables.
/// \returns the class representing the binary operation in the AST of the
/// expression, or an error holding a diagnostic against \p SM otherwise.
static Expected<std::unique_ptr<FileCheckExpressionAST>>
parseBinop(StringRef &Expr, std::unique_ptr<FileCheckExpressionAST> LeftOp,
bool IsLegacyLineExpr, Optional<size_t> LineNumber,
FileCheckPatternContext *Context, const SourceMgr &SM);
};
//===----------------------------------------------------------------------===//
/// Summary of a FileCheck diagnostic.
//===----------------------------------------------------------------------===//
struct FileCheckDiag {
/// What is the FileCheck directive for this diagnostic?
Check::FileCheckType CheckTy;
@ -677,52 +130,8 @@ struct FileCheckDiag {
SMLoc CheckLoc, MatchType MatchTy, SMRange InputRange);
};
//===----------------------------------------------------------------------===//
// Check Strings.
//===----------------------------------------------------------------------===//
/// A check that we found in the input file.
struct FileCheckString {
/// The pattern to match.
FileCheckPattern Pat;
/// Which prefix name this check matched.
StringRef Prefix;
/// The location in the match file that the check string was specified.
SMLoc Loc;
/// All of the strings that are disallowed from occurring between this match
/// string and the previous one (or start of file).
std::vector<FileCheckPattern> DagNotStrings;
FileCheckString(const FileCheckPattern &P, StringRef S, SMLoc L)
: Pat(P), Prefix(S), Loc(L) {}
/// Matches check string and its "not strings" and/or "dag strings".
size_t Check(const SourceMgr &SM, StringRef Buffer, bool IsLabelScanMode,
size_t &MatchLen, FileCheckRequest &Req,
std::vector<FileCheckDiag> *Diags) const;
/// Verifies that there is a single line in the given \p Buffer. Errors are
/// reported against \p SM.
bool CheckNext(const SourceMgr &SM, StringRef Buffer) const;
/// Verifies that there is no newline in the given \p Buffer. Errors are
/// reported against \p SM.
bool CheckSame(const SourceMgr &SM, StringRef Buffer) const;
/// Verifies that none of the strings in \p NotStrings are found in the given
/// \p Buffer. Errors are reported against \p SM and diagnostics recorded in
/// \p Diags according to the verbosity level set in \p Req.
bool CheckNot(const SourceMgr &SM, StringRef Buffer,
const std::vector<const FileCheckPattern *> &NotStrings,
const FileCheckRequest &Req,
std::vector<FileCheckDiag> *Diags) const;
/// Matches "dag strings" and their mixed "not strings".
size_t CheckDag(const SourceMgr &SM, StringRef Buffer,
std::vector<const FileCheckPattern *> &NotStrings,
const FileCheckRequest &Req,
std::vector<FileCheckDiag> *Diags) const;
};
class FileCheckPatternContext;
struct FileCheckString;
/// FileCheck class takes the request and exposes various methods that
/// use information from the request.
@ -765,5 +174,7 @@ public:
bool checkInput(SourceMgr &SM, StringRef Buffer,
std::vector<FileCheckDiag> *Diags = nullptr);
};
} // namespace llvm
#endif

1
lib/Support/FileCheck.cpp
View File

@ -14,6 +14,7 @@
//===----------------------------------------------------------------------===//
#include "llvm/Support/FileCheck.h"
#include "FileCheckImpl.h"
#include "llvm/ADT/StringSet.h"
#include "llvm/ADT/Twine.h"
#include "llvm/Support/FormatVariadic.h"

621
lib/Support/FileCheckImpl.h Normal file
View File

@ -0,0 +1,621 @@
//===-- FileCheckImpl.h - Private FileCheck Interface ------------*- 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
//
//===----------------------------------------------------------------------===//
//
// This file defines the private interfaces of FileCheck. Its purpose is to
// allow unit testing of FileCheck and to separate the interface from the
// implementation. It is only meant to be used by FileCheck.
//
//===----------------------------------------------------------------------===//
#ifndef LLVM_LIB_SUPPORT_FILECHECKIMPL_H
#define LLVM_LIB_SUPPORT_FILECHECKIMPL_H
#include "llvm/ADT/Optional.h"
#include "llvm/ADT/StringMap.h"
#include "llvm/ADT/StringRef.h"
#include "llvm/Support/Error.h"
#include "llvm/Support/SourceMgr.h"
#include <map>
#include <string>
#include <vector>
namespace llvm {
//===----------------------------------------------------------------------===//
// Numeric substitution handling code.
//===----------------------------------------------------------------------===//
/// Base class representing the AST of a given expression.
class FileCheckExpressionAST {
public:
virtual ~FileCheckExpressionAST() = default;
/// Evaluates and \returns the value of the expression represented by this
/// AST or an error if evaluation fails.
virtual Expected<uint64_t> eval() const = 0;
};
/// Class representing an unsigned literal in the AST of an expression.
class FileCheckExpressionLiteral : public FileCheckExpressionAST {
private:
/// Actual value of the literal.
uint64_t Value;
public:
/// Constructs a literal with the specified value.
FileCheckExpressionLiteral(uint64_t Val) : Value(Val) {}
/// \returns the literal's value.
Expected<uint64_t> eval() const { return Value; }
};
/// Class to represent an undefined variable error, which quotes that
/// variable's name when printed.
class FileCheckUndefVarError : public ErrorInfo<FileCheckUndefVarError> {
private:
StringRef VarName;
public:
static char ID;
FileCheckUndefVarError(StringRef VarName) : VarName(VarName) {}
StringRef getVarName() const { return VarName; }
std::error_code convertToErrorCode() const override {
return inconvertibleErrorCode();
}
/// Print name of variable associated with this error.
void log(raw_ostream &OS) const override {
OS << "\"";
OS.write_escaped(VarName) << "\"";
}
};
/// Class representing a numeric variable and its associated current value.
class FileCheckNumericVariable {
private:
/// Name of the numeric variable.
StringRef Name;
/// Value of numeric variable, if defined, or None otherwise.
Optional<uint64_t> Value;
/// Line number where this variable is defined, or None if defined before
/// input is parsed. Used to determine whether a variable is defined on the
/// same line as a given use.
Optional<size_t> DefLineNumber;
public:
/// Constructor for a variable \p Name defined at line \p DefLineNumber or
/// defined before input is parsed if \p DefLineNumber is None.
explicit FileCheckNumericVariable(StringRef Name,
Optional<size_t> DefLineNumber = None)
: Name(Name), DefLineNumber(DefLineNumber) {}
/// \returns name of this numeric variable.
StringRef getName() const { return Name; }
/// \returns this variable's value.
Optional<uint64_t> getValue() const { return Value; }
/// Sets value of this numeric variable to \p NewValue.
void setValue(uint64_t NewValue) { Value = NewValue; }
/// Clears value of this numeric variable, regardless of whether it is
/// currently defined or not.
void clearValue() { Value = None; }
/// \returns the line number where this variable is defined, if any, or None
/// if defined before input is parsed.
Optional<size_t> getDefLineNumber() { return DefLineNumber; }
};
/// Class representing the use of a numeric variable in the AST of an
/// expression.
class FileCheckNumericVariableUse : public FileCheckExpressionAST {
private:
/// Name of the numeric variable.
StringRef Name;
/// Pointer to the class instance for the variable this use is about.
FileCheckNumericVariable *NumericVariable;
public:
FileCheckNumericVariableUse(StringRef Name,
FileCheckNumericVariable *NumericVariable)
: Name(Name), NumericVariable(NumericVariable) {}
/// \returns the value of the variable referenced by this instance.
Expected<uint64_t> eval() const;
};
/// Type of functions evaluating a given binary operation.
using binop_eval_t = uint64_t (*)(uint64_t, uint64_t);
/// Class representing a single binary operation in the AST of an expression.
class FileCheckASTBinop : public FileCheckExpressionAST {
private:
/// Left operand.
std::unique_ptr<FileCheckExpressionAST> LeftOperand;
/// Right operand.
std::unique_ptr<FileCheckExpressionAST> RightOperand;
/// Pointer to function that can evaluate this binary operation.
binop_eval_t EvalBinop;
public:
FileCheckASTBinop(binop_eval_t EvalBinop,
std::unique_ptr<FileCheckExpressionAST> LeftOp,
std::unique_ptr<FileCheckExpressionAST> RightOp)
: EvalBinop(EvalBinop) {
LeftOperand = std::move(LeftOp);
RightOperand = std::move(RightOp);
}
/// Evaluates the value of the binary operation represented by this AST,
/// using EvalBinop on the result of recursively evaluating the operands.
/// \returns the expression value or an error if an undefined numeric
/// variable is used in one of the operands.
Expected<uint64_t> eval() const;
};
class FileCheckPatternContext;
/// Class representing a substitution to perform in the RegExStr string.
class FileCheckSubstitution {
protected:
/// Pointer to a class instance holding, among other things, the table with
/// the values of live string variables at the start of any given CHECK line.
/// Used for substituting string variables with the text they were defined
/// as. Expressions are linked to the numeric variables they use at
/// parse time and directly access the value of the numeric variable to
/// evaluate their value.
FileCheckPatternContext *Context;
/// The string that needs to be substituted for something else. For a
/// string variable this is its name, otherwise this is the whole expression.
StringRef FromStr;
// Index in RegExStr of where to do the substitution.
size_t InsertIdx;
public:
FileCheckSubstitution(FileCheckPatternContext *Context, StringRef VarName,
size_t InsertIdx)
: Context(Context), FromStr(VarName), InsertIdx(InsertIdx) {}
virtual ~FileCheckSubstitution() = default;
/// \returns the string to be substituted for something else.
StringRef getFromString() const { return FromStr; }
/// \returns the index where the substitution is to be performed in RegExStr.
size_t getIndex() const { return InsertIdx; }
/// \returns a string containing the result of the substitution represented
/// by this class instance or an error if substitution failed.
virtual Expected<std::string> getResult() const = 0;
};
class FileCheckStringSubstitution : public FileCheckSubstitution {
public:
FileCheckStringSubstitution(FileCheckPatternContext *Context,
StringRef VarName, size_t InsertIdx)
: FileCheckSubstitution(Context, VarName, InsertIdx) {}
/// \returns the text that the string variable in this substitution matched
/// when defined, or an error if the variable is undefined.
Expected<std::string> getResult() const override;
};
class FileCheckNumericSubstitution : public FileCheckSubstitution {
private:
/// Pointer to the class representing the expression whose value is to be
/// substituted.
std::unique_ptr<FileCheckExpressionAST> ExpressionAST;
public:
FileCheckNumericSubstitution(FileCheckPatternContext *Context, StringRef Expr,
std::unique_ptr<FileCheckExpressionAST> ExprAST,
size_t InsertIdx)
: FileCheckSubstitution(Context, Expr, InsertIdx) {
ExpressionAST = std::move(ExprAST);
}
/// \returns a string containing the result of evaluating the expression in
/// this substitution, or an error if evaluation failed.
Expected<std::string> getResult() const override;
};
//===----------------------------------------------------------------------===//
// Pattern handling code.
//===----------------------------------------------------------------------===//
struct FileCheckDiag;
/// Class holding the FileCheckPattern global state, shared by all patterns:
/// tables holding values of variables and whether they are defined or not at
/// any given time in the matching process.
class FileCheckPatternContext {
friend class FileCheckPattern;
private:
/// When matching a given pattern, this holds the value of all the string
/// variables defined in previous patterns. In a pattern, only the last
/// definition for a given variable is recorded in this table.
/// Back-references are used for uses after any the other definition.
StringMap<StringRef> GlobalVariableTable;
/// Map of all string variables defined so far. Used at parse time to detect
/// a name conflict between a numeric variable and a string variable when
/// the former is defined on a later line than the latter.
StringMap<bool> DefinedVariableTable;
/// When matching a given pattern, this holds the pointers to the classes
/// representing the numeric variables defined in previous patterns. When
/// matching a pattern all definitions for that pattern are recorded in the
/// NumericVariableDefs table in the FileCheckPattern instance of that
/// pattern.
StringMap<FileCheckNumericVariable *> GlobalNumericVariableTable;
/// Pointer to the class instance representing the @LINE pseudo variable for
/// easily updating its value.
FileCheckNumericVariable *LineVariable = nullptr;
/// Vector holding pointers to all parsed numeric variables. Used to
/// automatically free them once they are guaranteed to no longer be used.
std::vector<std::unique_ptr<FileCheckNumericVariable>> NumericVariables;
/// Vector holding pointers to all substitutions. Used to automatically free
/// them once they are guaranteed to no longer be used.
std::vector<std::unique_ptr<FileCheckSubstitution>> Substitutions;
public:
/// \returns the value of string variable \p VarName or an error if no such
/// variable has been defined.
Expected<StringRef> getPatternVarValue(StringRef VarName);
/// Defines string and numeric variables from definitions given on the
/// command line, passed as a vector of [#]VAR=VAL strings in
/// \p CmdlineDefines. \returns an error list containing diagnostics against
/// \p SM for all definition parsing failures, if any, or Success otherwise.
Error defineCmdlineVariables(std::vector<std::string> &CmdlineDefines,
SourceMgr &SM);
/// Create @LINE pseudo variable. Value is set when pattern are being
/// matched.
void createLineVariable();
/// Undefines local variables (variables whose name does not start with a '$'
/// sign), i.e. removes them from GlobalVariableTable and from
/// GlobalNumericVariableTable and also clears the value of numeric
/// variables.
void clearLocalVars();
private:
/// Makes a new numeric variable and registers it for destruction when the
/// context is destroyed.
template <class... Types>
FileCheckNumericVariable *makeNumericVariable(Types... args);
/// Makes a new string substitution and registers it for destruction when the
/// context is destroyed.
FileCheckSubstitution *makeStringSubstitution(StringRef VarName,
size_t InsertIdx);
/// Makes a new numeric substitution and registers it for destruction when
/// the context is destroyed.
FileCheckSubstitution *
makeNumericSubstitution(StringRef ExpressionStr,
std::unique_ptr<FileCheckExpressionAST> ExpressionAST,
size_t InsertIdx);
};
/// Class to represent an error holding a diagnostic with location information
/// used when printing it.
class FileCheckErrorDiagnostic : public ErrorInfo<FileCheckErrorDiagnostic> {
private:
SMDiagnostic Diagnostic;
public:
static char ID;
FileCheckErrorDiagnostic(SMDiagnostic &&Diag) : Diagnostic(Diag) {}
std::error_code convertToErrorCode() const override {
return inconvertibleErrorCode();
}
/// Print diagnostic associated with this error when printing the error.
void log(raw_ostream &OS) const override { Diagnostic.print(nullptr, OS); }
static Error get(const SourceMgr &SM, SMLoc Loc, const Twine &ErrMsg) {
return make_error<FileCheckErrorDiagnostic>(
SM.GetMessage(Loc, SourceMgr::DK_Error, ErrMsg));
}
static Error get(const SourceMgr &SM, StringRef Buffer, const Twine &ErrMsg) {
return get(SM, SMLoc::getFromPointer(Buffer.data()), ErrMsg);
}
};
class FileCheckNotFoundError : public ErrorInfo<FileCheckNotFoundError> {
public:
static char ID;
std::error_code convertToErrorCode() const override {
return inconvertibleErrorCode();
}
/// Print diagnostic associated with this error when printing the error.
void log(raw_ostream &OS) const override {
OS << "String not found in input";
}
};
class FileCheckPattern {
SMLoc PatternLoc;
/// A fixed string to match as the pattern or empty if this pattern requires
/// a regex match.
StringRef FixedStr;
/// A regex string to match as the pattern or empty if this pattern requires
/// a fixed string to match.
std::string RegExStr;
/// Entries in this vector represent a substitution of a string variable or
/// an expression in the RegExStr regex at match time. For example, in the
/// case of a CHECK directive with the pattern "foo[[bar]]baz[[#N+1]]",
/// RegExStr will contain "foobaz" and we'll get two entries in this vector
/// that tells us to insert the value of string variable "bar" at offset 3
/// and the value of expression "N+1" at offset 6.
std::vector<FileCheckSubstitution *> Substitutions;
/// Maps names of string variables defined in a pattern to the number of
/// their parenthesis group in RegExStr capturing their last definition.
///
/// E.g. for the pattern "foo[[bar:.*]]baz([[bar]][[QUUX]][[bar:.*]])",
/// RegExStr will be "foo(.*)baz(\1<quux value>(.*))" where <quux value> is
/// the value captured for QUUX on the earlier line where it was defined, and
/// VariableDefs will map "bar" to the third parenthesis group which captures
/// the second definition of "bar".
///
/// Note: uses std::map rather than StringMap to be able to get the key when
/// iterating over values.
std::map<StringRef, unsigned> VariableDefs;
/// Structure representing the definition of a numeric variable in a pattern.
/// It holds the pointer to the class representing the numeric variable whose
/// value is being defined and the number of the parenthesis group in
/// RegExStr to capture that value.
struct FileCheckNumericVariableMatch {
/// Pointer to class representing the numeric variable whose value is being
/// defined.
FileCheckNumericVariable *DefinedNumericVariable;
/// Number of the parenthesis group in RegExStr that captures the value of
/// this numeric variable definition.
unsigned CaptureParenGroup;
};
/// Holds the number of the parenthesis group in RegExStr and pointer to the
/// corresponding FileCheckNumericVariable class instance of all numeric
/// variable definitions. Used to set the matched value of all those
/// variables.
StringMap<FileCheckNumericVariableMatch> NumericVariableDefs;
/// Pointer to a class instance holding the global state shared by all
/// patterns:
/// - separate tables with the values of live string and numeric variables
/// respectively at the start of any given CHECK line;
/// - table holding whether a string variable has been defined at any given
/// point during the parsing phase.
FileCheckPatternContext *Context;
Check::FileCheckType CheckTy;
/// Line number for this CHECK pattern or None if it is an implicit pattern.
/// Used to determine whether a variable definition is made on an earlier
/// line to the one with this CHECK.
Optional<size_t> LineNumber;
public:
FileCheckPattern(Check::FileCheckType Ty, FileCheckPatternContext *Context,
Optional<size_t> Line = None)
: Context(Context), CheckTy(Ty), LineNumber(Line) {}
/// \returns the location in source code.
SMLoc getLoc() const { return PatternLoc; }
/// \returns the pointer to the global state for all patterns in this
/// FileCheck instance.
FileCheckPatternContext *getContext() const { return Context; }
/// \returns whether \p C is a valid first character for a variable name.
static bool isValidVarNameStart(char C);
/// Parsing information about a variable.
struct VariableProperties {
StringRef Name;
bool IsPseudo;
};
/// Parses the string at the start of \p Str for a variable name. \returns
/// a VariableProperties structure holding the variable name and whether it
/// is the name of a pseudo variable, or an error holding a diagnostic
/// against \p SM if parsing fail. If parsing was successful, also strips
/// \p Str from the variable name.
static Expected<VariableProperties> parseVariable(StringRef &Str,
const SourceMgr &SM);
/// Parses \p Expr for a numeric substitution block at line \p LineNumber,
/// or before input is parsed if \p LineNumber is None. Parameter
/// \p IsLegacyLineExpr indicates whether \p Expr should be a legacy @LINE
/// expression and \p Context points to the class instance holding the live
/// string and numeric variables. \returns a pointer to the class instance
/// representing the AST of the expression whose value must be substitued, or
/// an error holding a diagnostic against \p SM if parsing fails. If
/// substitution was successful, sets \p DefinedNumericVariable to point to
/// the class representing the numeric variable defined in this numeric
/// substitution block, or None if this block does not define any variable.
static Expected<std::unique_ptr<FileCheckExpressionAST>>
parseNumericSubstitutionBlock(
StringRef Expr,
Optional<FileCheckNumericVariable *> &DefinedNumericVariable,
bool IsLegacyLineExpr, Optional<size_t> LineNumber,
FileCheckPatternContext *Context, const SourceMgr &SM);
/// Parses the pattern in \p PatternStr and initializes this FileCheckPattern
/// instance accordingly.
///
/// \p Prefix provides which prefix is being matched, \p Req describes the
/// global options that influence the parsing such as whitespace
/// canonicalization, \p SM provides the SourceMgr used for error reports.
/// \returns true in case of an error, false otherwise.
bool parsePattern(StringRef PatternStr, StringRef Prefix, SourceMgr &SM,
const FileCheckRequest &Req);
/// Matches the pattern string against the input buffer \p Buffer
///
/// \returns the position that is matched or an error indicating why matching
/// failed. If there is a match, updates \p MatchLen with the size of the
/// matched string.
///
/// The GlobalVariableTable StringMap in the FileCheckPatternContext class
/// instance provides the current values of FileCheck string variables and
/// is updated if this match defines new values. Likewise, the
/// GlobalNumericVariableTable StringMap in the same class provides the
/// current values of FileCheck numeric variables and is updated if this
/// match defines new numeric values.
Expected<size_t> match(StringRef Buffer, size_t &MatchLen,
const SourceMgr &SM) const;
/// Prints the value of successful substitutions or the name of the undefined
/// string or numeric variables preventing a successful substitution.
void printSubstitutions(const SourceMgr &SM, StringRef Buffer,
SMRange MatchRange = None) const;
void printFuzzyMatch(const SourceMgr &SM, StringRef Buffer,
std::vector<FileCheckDiag> *Diags) const;
bool hasVariable() const {
return !(Substitutions.empty() && VariableDefs.empty());
}
Check::FileCheckType getCheckTy() const { return CheckTy; }
int getCount() const { return CheckTy.getCount(); }
private:
bool AddRegExToRegEx(StringRef RS, unsigned &CurParen, SourceMgr &SM);
void AddBackrefToRegEx(unsigned BackrefNum);
/// Computes an arbitrary estimate for the quality of matching this pattern
/// at the start of \p Buffer; a distance of zero should correspond to a
/// perfect match.
unsigned computeMatchDistance(StringRef Buffer) const;
/// Finds the closing sequence of a regex variable usage or definition.
///
/// \p Str has to point in the beginning of the definition (right after the
/// opening sequence). \p SM holds the SourceMgr used for error repporting.
/// \returns the offset of the closing sequence within Str, or npos if it
/// was not found.
size_t FindRegexVarEnd(StringRef Str, SourceMgr &SM);
/// Parses \p Expr for the name of a numeric variable to be defined at line
/// \p LineNumber, or before input is parsed if \p LineNumber is None.
/// \returns a pointer to the class instance representing that variable,
/// creating it if needed, or an error holding a diagnostic against \p SM
/// should defining such a variable be invalid.
static Expected<FileCheckNumericVariable *> parseNumericVariableDefinition(
StringRef &Expr, FileCheckPatternContext *Context,
Optional<size_t> LineNumber, const SourceMgr &SM);
/// Parses \p Name as a (pseudo if \p IsPseudo is true) numeric variable use
/// at line \p LineNumber, or before input is parsed if \p LineNumber is
/// None. Parameter \p Context points to the class instance holding the live
/// string and numeric variables. \returns the pointer to the class instance
/// representing that variable if successful, or an error holding a
/// diagnostic against \p SM otherwise.
static Expected<std::unique_ptr<FileCheckNumericVariableUse>>
parseNumericVariableUse(StringRef Name, bool IsPseudo,
Optional<size_t> LineNumber,
FileCheckPatternContext *Context,
const SourceMgr &SM);
enum class AllowedOperand { LineVar, Literal, Any };
/// Parses \p Expr for use of a numeric operand at line \p LineNumber, or
/// before input is parsed if \p LineNumber is None. Accepts both literal
/// values and numeric variables, depending on the value of \p AO. Parameter
/// \p Context points to the class instance holding the live string and
/// numeric variables. \returns the class representing that operand in the
/// AST of the expression or an error holding a diagnostic against \p SM
/// otherwise.
static Expected<std::unique_ptr<FileCheckExpressionAST>>
parseNumericOperand(StringRef &Expr, AllowedOperand AO,
Optional<size_t> LineNumber,
FileCheckPatternContext *Context, const SourceMgr &SM);
/// Parses \p Expr for a binary operation at line \p LineNumber, or before
/// input is parsed if \p LineNumber is None. The left operand of this binary
/// operation is given in \p LeftOp and \p IsLegacyLineExpr indicates whether
/// we are parsing a legacy @LINE expression. Parameter \p Context points to
/// the class instance holding the live string and numeric variables.
/// \returns the class representing the binary operation in the AST of the
/// expression, or an error holding a diagnostic against \p SM otherwise.
static Expected<std::unique_ptr<FileCheckExpressionAST>>
parseBinop(StringRef &Expr, std::unique_ptr<FileCheckExpressionAST> LeftOp,
bool IsLegacyLineExpr, Optional<size_t> LineNumber,
FileCheckPatternContext *Context, const SourceMgr &SM);
};
//===----------------------------------------------------------------------===//
// Check Strings.
//===----------------------------------------------------------------------===//
/// A check that we found in the input file.
struct FileCheckString {
/// The pattern to match.
FileCheckPattern Pat;
/// Which prefix name this check matched.
StringRef Prefix;
/// The location in the match file that the check string was specified.
SMLoc Loc;
/// All of the strings that are disallowed from occurring between this match
/// string and the previous one (or start of file).
std::vector<FileCheckPattern> DagNotStrings;
FileCheckString(const FileCheckPattern &P, StringRef S, SMLoc L)
: Pat(P), Prefix(S), Loc(L) {}
/// Matches check string and its "not strings" and/or "dag strings".
size_t Check(const SourceMgr &SM, StringRef Buffer, bool IsLabelScanMode,
size_t &MatchLen, FileCheckRequest &Req,
std::vector<FileCheckDiag> *Diags) const;
/// Verifies that there is a single line in the given \p Buffer. Errors are
/// reported against \p SM.
bool CheckNext(const SourceMgr &SM, StringRef Buffer) const;
/// Verifies that there is no newline in the given \p Buffer. Errors are
/// reported against \p SM.
bool CheckSame(const SourceMgr &SM, StringRef Buffer) const;
/// Verifies that none of the strings in \p NotStrings are found in the given
/// \p Buffer. Errors are reported against \p SM and diagnostics recorded in
/// \p Diags according to the verbosity level set in \p Req.
bool CheckNot(const SourceMgr &SM, StringRef Buffer,
const std::vector<const FileCheckPattern *> &NotStrings,
const FileCheckRequest &Req,
std::vector<FileCheckDiag> *Diags) const;
/// Matches "dag strings" and their mixed "not strings".
size_t CheckDag(const SourceMgr &SM, StringRef Buffer,
std::vector<const FileCheckPattern *> &NotStrings,
const FileCheckRequest &Req,
std::vector<FileCheckDiag> *Diags) const;
};
} // namespace llvm
#endif

2
unittests/Support/FileCheckTest.cpp
View File

@ -7,10 +7,12 @@
//===----------------------------------------------------------------------===//
#include "llvm/Support/FileCheck.h"
#include "../lib/Support/FileCheckImpl.h"
#include "gtest/gtest.h"
#include <unordered_set>
using namespace llvm;
namespace {
class FileCheckTest : public ::testing::Test {};