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cc27d61007
llvm-mirror/lib/FileCheck/FileCheck.cpp
Martin Storsjö 9d14adb9f6 [llvm] Rename StringRef _lower() method calls to _insensitive() 
This is a mechanical change. This actually also renames the
similarly named methods in the SmallString class, however these
methods don't seem to be used outside of the llvm subproject, so
this doesn't break building of the rest of the monorepo.
2021-06-25 00:22:01 +03:00

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//===- FileCheck.cpp - Check that File's Contents match what is expected --===//
//
// 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
//
//===----------------------------------------------------------------------===//
//
// FileCheck does a line-by line check of a file that validates whether it
// contains the expected content. This is useful for regression tests etc.
//
// This file implements most of the API that will be used by the FileCheck utility
// as well as various unittests.
//===----------------------------------------------------------------------===//
#include "llvm/FileCheck/FileCheck.h"
#include "FileCheckImpl.h"
#include "llvm/ADT/STLExtras.h"
#include "llvm/ADT/StringSet.h"
#include "llvm/ADT/Twine.h"
#include "llvm/Support/CheckedArithmetic.h"
#include "llvm/Support/FormatVariadic.h"
#include <cstdint>
#include <list>
#include <set>
#include <tuple>
#include <utility>
using namespace llvm;
StringRef ExpressionFormat::toString() const {
switch (Value) {
case Kind::NoFormat:
return StringRef("<none>");
case Kind::Unsigned:
return StringRef("%u");
case Kind::Signed:
return StringRef("%d");
case Kind::HexUpper:
return StringRef("%X");
case Kind::HexLower:
return StringRef("%x");
}
llvm_unreachable("unknown expression format");
}
Expected<std::string> ExpressionFormat::getWildcardRegex() const {
StringRef AlternateFormPrefix = AlternateForm ? StringRef("0x") : StringRef();
auto CreatePrecisionRegex = [&](StringRef S) {
return (Twine(AlternateFormPrefix) + S + Twine('{') + Twine(Precision) +
"}")
.str();
};
switch (Value) {
case Kind::Unsigned:
if (Precision)
return CreatePrecisionRegex("([1-9][0-9]*)?[0-9]");
return std::string("[0-9]+");
case Kind::Signed:
if (Precision)
return CreatePrecisionRegex("-?([1-9][0-9]*)?[0-9]");
return std::string("-?[0-9]+");
case Kind::HexUpper:
if (Precision)
return CreatePrecisionRegex("([1-9A-F][0-9A-F]*)?[0-9A-F]");
return (Twine(AlternateFormPrefix) + Twine("[0-9A-F]+")).str();
case Kind::HexLower:
if (Precision)
return CreatePrecisionRegex("([1-9a-f][0-9a-f]*)?[0-9a-f]");
return (Twine(AlternateFormPrefix) + Twine("[0-9a-f]+")).str();
default:
return createStringError(std::errc::invalid_argument,
"trying to match value with invalid format");
}
}
Expected<std::string>
ExpressionFormat::getMatchingString(ExpressionValue IntegerValue) const {
uint64_t AbsoluteValue;
StringRef SignPrefix = IntegerValue.isNegative() ? "-" : "";
if (Value == Kind::Signed) {
Expected<int64_t> SignedValue = IntegerValue.getSignedValue();
if (!SignedValue)
return SignedValue.takeError();
if (*SignedValue < 0)
AbsoluteValue = cantFail(IntegerValue.getAbsolute().getUnsignedValue());
else
AbsoluteValue = *SignedValue;
} else {
Expected<uint64_t> UnsignedValue = IntegerValue.getUnsignedValue();
if (!UnsignedValue)
return UnsignedValue.takeError();
AbsoluteValue = *UnsignedValue;
}
std::string AbsoluteValueStr;
switch (Value) {
case Kind::Unsigned:
case Kind::Signed:
AbsoluteValueStr = utostr(AbsoluteValue);
break;
case Kind::HexUpper:
case Kind::HexLower:
AbsoluteValueStr = utohexstr(AbsoluteValue, Value == Kind::HexLower);
break;
default:
return createStringError(std::errc::invalid_argument,
"trying to match value with invalid format");
}
StringRef AlternateFormPrefix = AlternateForm ? StringRef("0x") : StringRef();
if (Precision > AbsoluteValueStr.size()) {
unsigned LeadingZeros = Precision - AbsoluteValueStr.size();
return (Twine(SignPrefix) + Twine(AlternateFormPrefix) +
std::string(LeadingZeros, '0') + AbsoluteValueStr)
.str();
}
return (Twine(SignPrefix) + Twine(AlternateFormPrefix) + AbsoluteValueStr)
.str();
}
Expected<ExpressionValue>
ExpressionFormat::valueFromStringRepr(StringRef StrVal,
const SourceMgr &SM) const {
bool ValueIsSigned = Value == Kind::Signed;
// Both the FileCheck utility and library only call this method with a valid
// value in StrVal. This is guaranteed by the regex returned by
// getWildcardRegex() above. Only underflow and overflow errors can thus
// occur. However new uses of this method could be added in the future so
// the error message does not make assumptions about StrVal.
StringRef IntegerParseErrorStr = "unable to represent numeric value";
if (ValueIsSigned) {
int64_t SignedValue;
if (StrVal.getAsInteger(10, SignedValue))
return ErrorDiagnostic::get(SM, StrVal, IntegerParseErrorStr);
return ExpressionValue(SignedValue);
}
bool Hex = Value == Kind::HexUpper || Value == Kind::HexLower;
uint64_t UnsignedValue;
bool MissingFormPrefix = AlternateForm && !StrVal.consume_front("0x");
if (StrVal.getAsInteger(Hex ? 16 : 10, UnsignedValue))
return ErrorDiagnostic::get(SM, StrVal, IntegerParseErrorStr);
// Error out for a missing prefix only now that we know we have an otherwise
// valid integer. For example, "-0x18" is reported above instead.
if (MissingFormPrefix)
return ErrorDiagnostic::get(SM, StrVal, "missing alternate form prefix");
return ExpressionValue(UnsignedValue);
}
static int64_t getAsSigned(uint64_t UnsignedValue) {
// Use memcpy to reinterpret the bitpattern in Value since casting to
// signed is implementation-defined if the unsigned value is too big to be
// represented in the signed type and using an union violates type aliasing
// rules.
int64_t SignedValue;
memcpy(&SignedValue, &UnsignedValue, sizeof(SignedValue));
return SignedValue;
}
Expected<int64_t> ExpressionValue::getSignedValue() const {
if (Negative)
return getAsSigned(Value);
if (Value > (uint64_t)std::numeric_limits<int64_t>::max())
return make_error<OverflowError>();
// Value is in the representable range of int64_t so we can use cast.
return static_cast<int64_t>(Value);
}
Expected<uint64_t> ExpressionValue::getUnsignedValue() const {
if (Negative)
return make_error<OverflowError>();
return Value;
}
ExpressionValue ExpressionValue::getAbsolute() const {
if (!Negative)
return *this;
int64_t SignedValue = getAsSigned(Value);
int64_t MaxInt64 = std::numeric_limits<int64_t>::max();
// Absolute value can be represented as int64_t.
if (SignedValue >= -MaxInt64)
return ExpressionValue(-getAsSigned(Value));
// -X == -(max int64_t + Rem), negate each component independently.
SignedValue += MaxInt64;
uint64_t RemainingValueAbsolute = -SignedValue;
return ExpressionValue(MaxInt64 + RemainingValueAbsolute);
}
Expected<ExpressionValue> llvm::operator+(const ExpressionValue &LeftOperand,
const ExpressionValue &RightOperand) {
if (LeftOperand.isNegative() && RightOperand.isNegative()) {
int64_t LeftValue = cantFail(LeftOperand.getSignedValue());
int64_t RightValue = cantFail(RightOperand.getSignedValue());
Optional<int64_t> Result = checkedAdd<int64_t>(LeftValue, RightValue);
if (!Result)
return make_error<OverflowError>();
return ExpressionValue(*Result);
}
// (-A) + B == B - A.
if (LeftOperand.isNegative())
return RightOperand - LeftOperand.getAbsolute();
// A + (-B) == A - B.
if (RightOperand.isNegative())
return LeftOperand - RightOperand.getAbsolute();
// Both values are positive at this point.
uint64_t LeftValue = cantFail(LeftOperand.getUnsignedValue());
uint64_t RightValue = cantFail(RightOperand.getUnsignedValue());
Optional<uint64_t> Result =
checkedAddUnsigned<uint64_t>(LeftValue, RightValue);
if (!Result)
return make_error<OverflowError>();
return ExpressionValue(*Result);
}
Expected<ExpressionValue> llvm::operator-(const ExpressionValue &LeftOperand,
const ExpressionValue &RightOperand) {
// Result will be negative and thus might underflow.
if (LeftOperand.isNegative() && !RightOperand.isNegative()) {
int64_t LeftValue = cantFail(LeftOperand.getSignedValue());
uint64_t RightValue = cantFail(RightOperand.getUnsignedValue());
// Result <= -1 - (max int64_t) which overflows on 1- and 2-complement.
if (RightValue > (uint64_t)std::numeric_limits<int64_t>::max())
return make_error<OverflowError>();
Optional<int64_t> Result =
checkedSub(LeftValue, static_cast<int64_t>(RightValue));
if (!Result)
return make_error<OverflowError>();
return ExpressionValue(*Result);
}
// (-A) - (-B) == B - A.
if (LeftOperand.isNegative())
return RightOperand.getAbsolute() - LeftOperand.getAbsolute();
// A - (-B) == A + B.
if (RightOperand.isNegative())
return LeftOperand + RightOperand.getAbsolute();
// Both values are positive at this point.
uint64_t LeftValue = cantFail(LeftOperand.getUnsignedValue());
uint64_t RightValue = cantFail(RightOperand.getUnsignedValue());
if (LeftValue >= RightValue)
return ExpressionValue(LeftValue - RightValue);
else {
uint64_t AbsoluteDifference = RightValue - LeftValue;
uint64_t MaxInt64 = std::numeric_limits<int64_t>::max();
// Value might underflow.
if (AbsoluteDifference > MaxInt64) {
AbsoluteDifference -= MaxInt64;
int64_t Result = -MaxInt64;
int64_t MinInt64 = std::numeric_limits<int64_t>::min();
// Underflow, tested by:
// abs(Result + (max int64_t)) > abs((min int64_t) + (max int64_t))
if (AbsoluteDifference > static_cast<uint64_t>(-(MinInt64 - Result)))
return make_error<OverflowError>();
Result -= static_cast<int64_t>(AbsoluteDifference);
return ExpressionValue(Result);
}
return ExpressionValue(-static_cast<int64_t>(AbsoluteDifference));
}
}
Expected<ExpressionValue> llvm::operator*(const ExpressionValue &LeftOperand,
const ExpressionValue &RightOperand) {
// -A * -B == A * B
if (LeftOperand.isNegative() && RightOperand.isNegative())
return LeftOperand.getAbsolute() * RightOperand.getAbsolute();
// A * -B == -B * A
if (RightOperand.isNegative())
return RightOperand * LeftOperand;
assert(!RightOperand.isNegative() && "Unexpected negative operand!");
// Result will be negative and can underflow.
if (LeftOperand.isNegative()) {
auto Result = LeftOperand.getAbsolute() * RightOperand.getAbsolute();
if (!Result)
return Result;
return ExpressionValue(0) - *Result;
}
// Result will be positive and can overflow.
uint64_t LeftValue = cantFail(LeftOperand.getUnsignedValue());
uint64_t RightValue = cantFail(RightOperand.getUnsignedValue());
Optional<uint64_t> Result =
checkedMulUnsigned<uint64_t>(LeftValue, RightValue);
if (!Result)
return make_error<OverflowError>();
return ExpressionValue(*Result);
}
Expected<ExpressionValue> llvm::operator/(const ExpressionValue &LeftOperand,
const ExpressionValue &RightOperand) {
// -A / -B == A / B
if (LeftOperand.isNegative() && RightOperand.isNegative())
return LeftOperand.getAbsolute() / RightOperand.getAbsolute();
// Check for divide by zero.
if (RightOperand == ExpressionValue(0))
return make_error<OverflowError>();
// Result will be negative and can underflow.
if (LeftOperand.isNegative() || RightOperand.isNegative())
return ExpressionValue(0) -
cantFail(LeftOperand.getAbsolute() / RightOperand.getAbsolute());
uint64_t LeftValue = cantFail(LeftOperand.getUnsignedValue());
uint64_t RightValue = cantFail(RightOperand.getUnsignedValue());
return ExpressionValue(LeftValue / RightValue);
}
Expected<ExpressionValue> llvm::max(const ExpressionValue &LeftOperand,
const ExpressionValue &RightOperand) {
if (LeftOperand.isNegative() && RightOperand.isNegative()) {
int64_t LeftValue = cantFail(LeftOperand.getSignedValue());
int64_t RightValue = cantFail(RightOperand.getSignedValue());
return ExpressionValue(std::max(LeftValue, RightValue));
}
if (!LeftOperand.isNegative() && !RightOperand.isNegative()) {
uint64_t LeftValue = cantFail(LeftOperand.getUnsignedValue());
uint64_t RightValue = cantFail(RightOperand.getUnsignedValue());
return ExpressionValue(std::max(LeftValue, RightValue));
}
if (LeftOperand.isNegative())
return RightOperand;
return LeftOperand;
}
Expected<ExpressionValue> llvm::min(const ExpressionValue &LeftOperand,
const ExpressionValue &RightOperand) {
if (cantFail(max(LeftOperand, RightOperand)) == LeftOperand)
return RightOperand;
return LeftOperand;
}
Expected<ExpressionValue> NumericVariableUse::eval() const {
Optional<ExpressionValue> Value = Variable->getValue();
if (Value)
return *Value;
return make_error<UndefVarError>(getExpressionStr());
}
Expected<ExpressionValue> BinaryOperation::eval() const {
Expected<ExpressionValue> LeftOp = LeftOperand->eval();
Expected<ExpressionValue> RightOp = RightOperand->eval();
// Bubble up any error (e.g. undefined variables) in the recursive
// evaluation.
if (!LeftOp || !RightOp) {
Error Err = Error::success();
if (!LeftOp)
Err = joinErrors(std::move(Err), LeftOp.takeError());
if (!RightOp)
Err = joinErrors(std::move(Err), RightOp.takeError());
return std::move(Err);
}
return EvalBinop(*LeftOp, *RightOp);
}
Expected<ExpressionFormat>
BinaryOperation::getImplicitFormat(const SourceMgr &SM) const {
Expected<ExpressionFormat> LeftFormat = LeftOperand->getImplicitFormat(SM);
Expected<ExpressionFormat> RightFormat = RightOperand->getImplicitFormat(SM);
if (!LeftFormat || !RightFormat) {
Error Err = Error::success();
if (!LeftFormat)
Err = joinErrors(std::move(Err), LeftFormat.takeError());
if (!RightFormat)
Err = joinErrors(std::move(Err), RightFormat.takeError());
return std::move(Err);
}
if (*LeftFormat != ExpressionFormat::Kind::NoFormat &&
*RightFormat != ExpressionFormat::Kind::NoFormat &&
*LeftFormat != *RightFormat)
return ErrorDiagnostic::get(
SM, getExpressionStr(),
"implicit format conflict between '" + LeftOperand->getExpressionStr() +
"' (" + LeftFormat->toString() + ") and '" +
RightOperand->getExpressionStr() + "' (" + RightFormat->toString() +
"), need an explicit format specifier");
return *LeftFormat != ExpressionFormat::Kind::NoFormat ? *LeftFormat
: *RightFormat;
}
Expected<std::string> NumericSubstitution::getResult() const {
assert(ExpressionPointer->getAST() != nullptr &&
"Substituting empty expression");
Expected<ExpressionValue> EvaluatedValue =
ExpressionPointer->getAST()->eval();
if (!EvaluatedValue)
return EvaluatedValue.takeError();
ExpressionFormat Format = ExpressionPointer->getFormat();
return Format.getMatchingString(*EvaluatedValue);
}
Expected<std::string> StringSubstitution::getResult() const {
// Look up the value and escape it so that we can put it into the regex.
Expected<StringRef> VarVal = Context->getPatternVarValue(FromStr);
if (!VarVal)
return VarVal.takeError();
return Regex::escape(*VarVal);
}
bool Pattern::isValidVarNameStart(char C) { return C == '_' || isAlpha(C); }
Expected<Pattern::VariableProperties>
Pattern::parseVariable(StringRef &Str, const SourceMgr &SM) {
if (Str.empty())
return ErrorDiagnostic::get(SM, Str, "empty variable name");
size_t I = 0;
bool IsPseudo = Str[0] == '@';
// Global vars start with '$'.
if (Str[0] == '$' || IsPseudo)
++I;
if (!isValidVarNameStart(Str[I++]))
return ErrorDiagnostic::get(SM, Str, "invalid variable name");
for (size_t E = Str.size(); I != E; ++I)
// Variable names are composed of alphanumeric characters and underscores.
if (Str[I] != '_' && !isAlnum(Str[I]))
break;
StringRef Name = Str.take_front(I);
Str = Str.substr(I);
return VariableProperties {Name, IsPseudo};
}
// StringRef holding all characters considered as horizontal whitespaces by
// FileCheck input canonicalization.
constexpr StringLiteral SpaceChars = " \t";
// Parsing helper function that strips the first character in S and returns it.
static char popFront(StringRef &S) {
char C = S.front();
S = S.drop_front();
return C;
}
char OverflowError::ID = 0;
char UndefVarError::ID = 0;
char ErrorDiagnostic::ID = 0;
char NotFoundError::ID = 0;
char ErrorReported::ID = 0;
Expected<NumericVariable *> Pattern::parseNumericVariableDefinition(
StringRef &Expr, FileCheckPatternContext *Context,
Optional<size_t> LineNumber, ExpressionFormat ImplicitFormat,
const SourceMgr &SM) {
Expected<VariableProperties> ParseVarResult = parseVariable(Expr, SM);
if (!ParseVarResult)
return ParseVarResult.takeError();
StringRef Name = ParseVarResult->Name;
if (ParseVarResult->IsPseudo)
return ErrorDiagnostic::get(
SM, Name, "definition of pseudo numeric variable unsupported");
// Detect collisions between string and numeric variables when the latter
// is created later than the former.
if (Context->DefinedVariableTable.find(Name) !=
Context->DefinedVariableTable.end())
return ErrorDiagnostic::get(
SM, Name, "string variable with name '" + Name + "' already exists");
Expr = Expr.ltrim(SpaceChars);
if (!Expr.empty())
return ErrorDiagnostic::get(
SM, Expr, "unexpected characters after numeric variable name");
NumericVariable *DefinedNumericVariable;
auto VarTableIter = Context->GlobalNumericVariableTable.find(Name);
if (VarTableIter != Context->GlobalNumericVariableTable.end()) {
DefinedNumericVariable = VarTableIter->second;
if (DefinedNumericVariable->getImplicitFormat() != ImplicitFormat)
return ErrorDiagnostic::get(
SM, Expr, "format different from previous variable definition");
} else
DefinedNumericVariable =
Context->makeNumericVariable(Name, ImplicitFormat, LineNumber);
return DefinedNumericVariable;
}
Expected<std::unique_ptr<NumericVariableUse>> Pattern::parseNumericVariableUse(
StringRef Name, bool IsPseudo, Optional<size_t> LineNumber,
FileCheckPatternContext *Context, const SourceMgr &SM) {
if (IsPseudo && !Name.equals("@LINE"))
return ErrorDiagnostic::get(
SM, Name, "invalid pseudo numeric variable '" + Name + "'");
// Numeric variable definitions and uses are parsed in the order in which
// they appear in the CHECK patterns. For each definition, the pointer to the
// class instance of the corresponding numeric variable definition is stored
// in GlobalNumericVariableTable in parsePattern. Therefore, if the pointer
// we get below is null, it means no such variable was defined before. When
// that happens, we create a dummy variable so that parsing can continue. All
// uses of undefined variables, whether string or numeric, are then diagnosed
// in printNoMatch() after failing to match.
auto VarTableIter = Context->GlobalNumericVariableTable.find(Name);
NumericVariable *NumericVariable;
if (VarTableIter != Context->GlobalNumericVariableTable.end())
NumericVariable = VarTableIter->second;
else {
NumericVariable = Context->makeNumericVariable(
Name, ExpressionFormat(ExpressionFormat::Kind::Unsigned));
Context->GlobalNumericVariableTable[Name] = NumericVariable;
}
Optional<size_t> DefLineNumber = NumericVariable->getDefLineNumber();
if (DefLineNumber && LineNumber && *DefLineNumber == *LineNumber)
return ErrorDiagnostic::get(
SM, Name,
"numeric variable '" + Name +
"' defined earlier in the same CHECK directive");
return std::make_unique<NumericVariableUse>(Name, NumericVariable);
}
Expected<std::unique_ptr<ExpressionAST>> Pattern::parseNumericOperand(
StringRef &Expr, AllowedOperand AO, bool MaybeInvalidConstraint,
Optional<size_t> LineNumber, FileCheckPatternContext *Context,
const SourceMgr &SM) {
if (Expr.startswith("(")) {
if (AO != AllowedOperand::Any)
return ErrorDiagnostic::get(
SM, Expr, "parenthesized expression not permitted here");
return parseParenExpr(Expr, LineNumber, Context, SM);
}
if (AO == AllowedOperand::LineVar || AO == AllowedOperand::Any) {
// Try to parse as a numeric variable use.
Expected<Pattern::VariableProperties> ParseVarResult =
parseVariable(Expr, SM);
if (ParseVarResult) {
// Try to parse a function call.
if (Expr.ltrim(SpaceChars).startswith("(")) {
if (AO != AllowedOperand::Any)
return ErrorDiagnostic::get(SM, ParseVarResult->Name,
"unexpected function call");
return parseCallExpr(Expr, ParseVarResult->Name, LineNumber, Context,
SM);
}
return parseNumericVariableUse(ParseVarResult->Name,
ParseVarResult->IsPseudo, LineNumber,
Context, SM);
}
if (AO == AllowedOperand::LineVar)
return ParseVarResult.takeError();
// Ignore the error and retry parsing as a literal.
consumeError(ParseVarResult.takeError());
}
// Otherwise, parse it as a literal.
int64_t SignedLiteralValue;
uint64_t UnsignedLiteralValue;
StringRef SaveExpr = Expr;
// Accept both signed and unsigned literal, default to signed literal.
if (!Expr.consumeInteger((AO == AllowedOperand::LegacyLiteral) ? 10 : 0,
UnsignedLiteralValue))
return std::make_unique<ExpressionLiteral>(SaveExpr.drop_back(Expr.size()),
UnsignedLiteralValue);
Expr = SaveExpr;
if (AO == AllowedOperand::Any && !Expr.consumeInteger(0, SignedLiteralValue))
return std::make_unique<ExpressionLiteral>(SaveExpr.drop_back(Expr.size()),
SignedLiteralValue);
return ErrorDiagnostic::get(
SM, Expr,
Twine("invalid ") +
(MaybeInvalidConstraint ? "matching constraint or " : "") +
"operand format");
}
Expected<std::unique_ptr<ExpressionAST>>
Pattern::parseParenExpr(StringRef &Expr, Optional<size_t> LineNumber,
FileCheckPatternContext *Context, const SourceMgr &SM) {
Expr = Expr.ltrim(SpaceChars);
assert(Expr.startswith("("));
// Parse right operand.
Expr.consume_front("(");
Expr = Expr.ltrim(SpaceChars);
if (Expr.empty())
return ErrorDiagnostic::get(SM, Expr, "missing operand in expression");
// Note: parseNumericOperand handles nested opening parentheses.
Expected<std::unique_ptr<ExpressionAST>> SubExprResult = parseNumericOperand(
Expr, AllowedOperand::Any, /*MaybeInvalidConstraint=*/false, LineNumber,
Context, SM);
Expr = Expr.ltrim(SpaceChars);
while (SubExprResult && !Expr.empty() && !Expr.startswith(")")) {
StringRef OrigExpr = Expr;
SubExprResult = parseBinop(OrigExpr, Expr, std::move(*SubExprResult), false,
LineNumber, Context, SM);
Expr = Expr.ltrim(SpaceChars);
}
if (!SubExprResult)
return SubExprResult;
if (!Expr.consume_front(")")) {
return ErrorDiagnostic::get(SM, Expr,
"missing ')' at end of nested expression");
}
return SubExprResult;
}
Expected<std::unique_ptr<ExpressionAST>>
Pattern::parseBinop(StringRef Expr, StringRef &RemainingExpr,
std::unique_ptr<ExpressionAST> LeftOp,
bool IsLegacyLineExpr, Optional<size_t> LineNumber,
FileCheckPatternContext *Context, const SourceMgr &SM) {
RemainingExpr = RemainingExpr.ltrim(SpaceChars);
if (RemainingExpr.empty())
return std::move(LeftOp);
// Check if this is a supported operation and select a function to perform
// it.
SMLoc OpLoc = SMLoc::getFromPointer(RemainingExpr.data());
char Operator = popFront(RemainingExpr);
binop_eval_t EvalBinop;
switch (Operator) {
case '+':
EvalBinop = operator+;
break;
case '-':
EvalBinop = operator-;
break;
default:
return ErrorDiagnostic::get(
SM, OpLoc, Twine("unsupported operation '") + Twine(Operator) + "'");
}
// Parse right operand.
RemainingExpr = RemainingExpr.ltrim(SpaceChars);
if (RemainingExpr.empty())
return ErrorDiagnostic::get(SM, RemainingExpr,
"missing operand in expression");
// The second operand in a legacy @LINE expression is always a literal.
AllowedOperand AO =
IsLegacyLineExpr ? AllowedOperand::LegacyLiteral : AllowedOperand::Any;
Expected<std::unique_ptr<ExpressionAST>> RightOpResult =
parseNumericOperand(RemainingExpr, AO, /*MaybeInvalidConstraint=*/false,
LineNumber, Context, SM);
if (!RightOpResult)
return RightOpResult;
Expr = Expr.drop_back(RemainingExpr.size());
return std::make_unique<BinaryOperation>(Expr, EvalBinop, std::move(LeftOp),
std::move(*RightOpResult));
}
Expected<std::unique_ptr<ExpressionAST>>
Pattern::parseCallExpr(StringRef &Expr, StringRef FuncName,
Optional<size_t> LineNumber,
FileCheckPatternContext *Context, const SourceMgr &SM) {
Expr = Expr.ltrim(SpaceChars);
assert(Expr.startswith("("));
auto OptFunc = StringSwitch<Optional<binop_eval_t>>(FuncName)
.Case("add", operator+)
.Case("div", operator/)
.Case("max", max)
.Case("min", min)
.Case("mul", operator*)
.Case("sub", operator-)
.Default(None);
if (!OptFunc)
return ErrorDiagnostic::get(
SM, FuncName, Twine("call to undefined function '") + FuncName + "'");
Expr.consume_front("(");
Expr = Expr.ltrim(SpaceChars);
// Parse call arguments, which are comma separated.
SmallVector<std::unique_ptr<ExpressionAST>, 4> Args;
while (!Expr.empty() && !Expr.startswith(")")) {
if (Expr.startswith(","))
return ErrorDiagnostic::get(SM, Expr, "missing argument");
// Parse the argument, which is an arbitary expression.
StringRef OuterBinOpExpr = Expr;
Expected<std::unique_ptr<ExpressionAST>> Arg = parseNumericOperand(
Expr, AllowedOperand::Any, /*MaybeInvalidConstraint=*/false, LineNumber,
Context, SM);
while (Arg && !Expr.empty()) {
Expr = Expr.ltrim(SpaceChars);
// Have we reached an argument terminator?
if (Expr.startswith(",") || Expr.startswith(")"))
break;
// Arg = Arg <op> <expr>
Arg = parseBinop(OuterBinOpExpr, Expr, std::move(*Arg), false, LineNumber,
Context, SM);
}
// Prefer an expression error over a generic invalid argument message.
if (!Arg)
return Arg.takeError();
Args.push_back(std::move(*Arg));
// Have we parsed all available arguments?
Expr = Expr.ltrim(SpaceChars);
if (!Expr.consume_front(","))
break;
Expr = Expr.ltrim(SpaceChars);
if (Expr.startswith(")"))
return ErrorDiagnostic::get(SM, Expr, "missing argument");
}
if (!Expr.consume_front(")"))
return ErrorDiagnostic::get(SM, Expr,
"missing ')' at end of call expression");
const unsigned NumArgs = Args.size();
if (NumArgs == 2)
return std::make_unique<BinaryOperation>(Expr, *OptFunc, std::move(Args[0]),
std::move(Args[1]));
// TODO: Support more than binop_eval_t.
return ErrorDiagnostic::get(SM, FuncName,
Twine("function '") + FuncName +
Twine("' takes 2 arguments but ") +
Twine(NumArgs) + " given");
}
Expected<std::unique_ptr<Expression>> Pattern::parseNumericSubstitutionBlock(
StringRef Expr, Optional<NumericVariable *> &DefinedNumericVariable,
bool IsLegacyLineExpr, Optional<size_t> LineNumber,
FileCheckPatternContext *Context, const SourceMgr &SM) {
std::unique_ptr<ExpressionAST> ExpressionASTPointer = nullptr;
StringRef DefExpr = StringRef();
DefinedNumericVariable = None;
ExpressionFormat ExplicitFormat = ExpressionFormat();
unsigned Precision = 0;
// Parse format specifier (NOTE: ',' is also an argument seperator).
size_t FormatSpecEnd = Expr.find(',');
size_t FunctionStart = Expr.find('(');
if (FormatSpecEnd != StringRef::npos && FormatSpecEnd < FunctionStart) {
StringRef FormatExpr = Expr.take_front(FormatSpecEnd);
Expr = Expr.drop_front(FormatSpecEnd + 1);
FormatExpr = FormatExpr.trim(SpaceChars);
if (!FormatExpr.consume_front("%"))
return ErrorDiagnostic::get(
SM, FormatExpr,
"invalid matching format specification in expression");
// Parse alternate form flag.
SMLoc AlternateFormFlagLoc = SMLoc::getFromPointer(FormatExpr.data());
bool AlternateForm = FormatExpr.consume_front("#");
// Parse precision.
if (FormatExpr.consume_front(".")) {
if (FormatExpr.consumeInteger(10, Precision))
return ErrorDiagnostic::get(SM, FormatExpr,
"invalid precision in format specifier");
}
if (!FormatExpr.empty()) {
// Check for unknown matching format specifier and set matching format in
// class instance representing this expression.
SMLoc FmtLoc = SMLoc::getFromPointer(FormatExpr.data());
switch (popFront(FormatExpr)) {
case 'u':
ExplicitFormat =
ExpressionFormat(ExpressionFormat::Kind::Unsigned, Precision);
break;
case 'd':
ExplicitFormat =
ExpressionFormat(ExpressionFormat::Kind::Signed, Precision);
break;
case 'x':
ExplicitFormat = ExpressionFormat(ExpressionFormat::Kind::HexLower,
Precision, AlternateForm);
break;
case 'X':
ExplicitFormat = ExpressionFormat(ExpressionFormat::Kind::HexUpper,
Precision, AlternateForm);
break;
default:
return ErrorDiagnostic::get(SM, FmtLoc,
"invalid format specifier in expression");
}
}
if (AlternateForm && ExplicitFormat != ExpressionFormat::Kind::HexLower &&
ExplicitFormat != ExpressionFormat::Kind::HexUpper)
return ErrorDiagnostic::get(
SM, AlternateFormFlagLoc,
"alternate form only supported for hex values");
FormatExpr = FormatExpr.ltrim(SpaceChars);
if (!FormatExpr.empty())
return ErrorDiagnostic::get(
SM, FormatExpr,
"invalid matching format specification in expression");
}
// Save variable definition expression if any.
size_t DefEnd = Expr.find(':');
if (DefEnd != StringRef::npos) {
DefExpr = Expr.substr(0, DefEnd);
Expr = Expr.substr(DefEnd + 1);
}
// Parse matching constraint.
Expr = Expr.ltrim(SpaceChars);
bool HasParsedValidConstraint = false;
if (Expr.consume_front("=="))
HasParsedValidConstraint = true;
// Parse the expression itself.
Expr = Expr.ltrim(SpaceChars);
if (Expr.empty()) {
if (HasParsedValidConstraint)
return ErrorDiagnostic::get(
SM, Expr, "empty numeric expression should not have a constraint");
} else {
Expr = Expr.rtrim(SpaceChars);
StringRef OuterBinOpExpr = Expr;
// The first operand in a legacy @LINE expression is always the @LINE
// pseudo variable.
AllowedOperand AO =
IsLegacyLineExpr ? AllowedOperand::LineVar : AllowedOperand::Any;
Expected<std::unique_ptr<ExpressionAST>> ParseResult = parseNumericOperand(
Expr, AO, !HasParsedValidConstraint, LineNumber, Context, SM);
while (ParseResult && !Expr.empty()) {
ParseResult = parseBinop(OuterBinOpExpr, Expr, std::move(*ParseResult),
IsLegacyLineExpr, LineNumber, Context, SM);
// Legacy @LINE expressions only allow 2 operands.
if (ParseResult && IsLegacyLineExpr && !Expr.empty())
return ErrorDiagnostic::get(
SM, Expr,
"unexpected characters at end of expression '" + Expr + "'");
}
if (!ParseResult)
return ParseResult.takeError();
ExpressionASTPointer = std::move(*ParseResult);
}
// Select format of the expression, i.e. (i) its explicit format, if any,
// otherwise (ii) its implicit format, if any, otherwise (iii) the default
// format (unsigned). Error out in case of conflicting implicit format
// without explicit format.
ExpressionFormat Format;
if (ExplicitFormat)
Format = ExplicitFormat;
else if (ExpressionASTPointer) {
Expected<ExpressionFormat> ImplicitFormat =
ExpressionASTPointer->getImplicitFormat(SM);
if (!ImplicitFormat)
return ImplicitFormat.takeError();
Format = *ImplicitFormat;
}
if (!Format)
Format = ExpressionFormat(ExpressionFormat::Kind::Unsigned, Precision);
std::unique_ptr<Expression> ExpressionPointer =
std::make_unique<Expression>(std::move(ExpressionASTPointer), Format);
// Parse the numeric variable definition.
if (DefEnd != StringRef::npos) {
DefExpr = DefExpr.ltrim(SpaceChars);
Expected<NumericVariable *> ParseResult = parseNumericVariableDefinition(
DefExpr, Context, LineNumber, ExpressionPointer->getFormat(), SM);
if (!ParseResult)
return ParseResult.takeError();
DefinedNumericVariable = *ParseResult;
}
return std::move(ExpressionPointer);
}
bool Pattern::parsePattern(StringRef PatternStr, StringRef Prefix,
SourceMgr &SM, const FileCheckRequest &Req) {
bool MatchFullLinesHere = Req.MatchFullLines && CheckTy != Check::CheckNot;
IgnoreCase = Req.IgnoreCase;
PatternLoc = SMLoc::getFromPointer(PatternStr.data());
if (!(Req.NoCanonicalizeWhiteSpace && Req.MatchFullLines))
// Ignore trailing whitespace.
while (!PatternStr.empty() &&
(PatternStr.back() == ' ' || PatternStr.back() == '\t'))
PatternStr = PatternStr.substr(0, PatternStr.size() - 1);
// Check that there is something on the line.
if (PatternStr.empty() && CheckTy != Check::CheckEmpty) {
SM.PrintMessage(PatternLoc, SourceMgr::DK_Error,
"found empty check string with prefix '" + Prefix + ":'");
return true;
}
if (!PatternStr.empty() && CheckTy == Check::CheckEmpty) {
SM.PrintMessage(
PatternLoc, SourceMgr::DK_Error,
"found non-empty check string for empty check with prefix '" + Prefix +
":'");
return true;
}
if (CheckTy == Check::CheckEmpty) {
RegExStr = "(\n$)";
return false;
}
// If literal check, set fixed string.
if (CheckTy.isLiteralMatch()) {
FixedStr = PatternStr;
return false;
}
// Check to see if this is a fixed string, or if it has regex pieces.
if (!MatchFullLinesHere &&
(PatternStr.size() < 2 || (PatternStr.find("{{") == StringRef::npos &&
PatternStr.find("[[") == StringRef::npos))) {
FixedStr = PatternStr;
return false;
}
if (MatchFullLinesHere) {
RegExStr += '^';
if (!Req.NoCanonicalizeWhiteSpace)
RegExStr += " *";
}
// Paren value #0 is for the fully matched string. Any new parenthesized
// values add from there.
unsigned CurParen = 1;
// Otherwise, there is at least one regex piece. Build up the regex pattern
// by escaping scary characters in fixed strings, building up one big regex.
while (!PatternStr.empty()) {
// RegEx matches.
if (PatternStr.startswith("{{")) {
// This is the start of a regex match. Scan for the }}.
size_t End = PatternStr.find("}}");
if (End == StringRef::npos) {
SM.PrintMessage(SMLoc::getFromPointer(PatternStr.data()),
SourceMgr::DK_Error,
"found start of regex string with no end '}}'");
return true;
}
// Enclose {{}} patterns in parens just like [[]] even though we're not
// capturing the result for any purpose. This is required in case the
// expression contains an alternation like: CHECK: abc{{x|z}}def. We
// want this to turn into: "abc(x|z)def" not "abcx|zdef".
RegExStr += '(';
++CurParen;
if (AddRegExToRegEx(PatternStr.substr(2, End - 2), CurParen, SM))
return true;
RegExStr += ')';
PatternStr = PatternStr.substr(End + 2);
continue;
}
// String and numeric substitution blocks. Pattern substitution blocks come
// in two forms: [[foo:.*]] and [[foo]]. The former matches .* (or some
// other regex) and assigns it to the string variable 'foo'. The latter
// substitutes foo's value. Numeric substitution blocks recognize the same
// form as string ones, but start with a '#' sign after the double
// brackets. They also accept a combined form which sets a numeric variable
// to the evaluation of an expression. Both string and numeric variable
// names must satisfy the regular expression "[a-zA-Z_][0-9a-zA-Z_]*" to be
// valid, as this helps catch some common errors.
if (PatternStr.startswith("[[")) {
StringRef UnparsedPatternStr = PatternStr.substr(2);
// Find the closing bracket pair ending the match. End is going to be an
// offset relative to the beginning of the match string.
size_t End = FindRegexVarEnd(UnparsedPatternStr, SM);
StringRef MatchStr = UnparsedPatternStr.substr(0, End);
bool IsNumBlock = MatchStr.consume_front("#");
if (End == StringRef::npos) {
SM.PrintMessage(SMLoc::getFromPointer(PatternStr.data()),
SourceMgr::DK_Error,
"Invalid substitution block, no ]] found");
return true;
}
// Strip the substitution block we are parsing. End points to the start
// of the "]]" closing the expression so account for it in computing the
// index of the first unparsed character.
PatternStr = UnparsedPatternStr.substr(End + 2);
bool IsDefinition = false;
bool SubstNeeded = false;
// Whether the substitution block is a legacy use of @LINE with string
// substitution block syntax.
bool IsLegacyLineExpr = false;
StringRef DefName;
StringRef SubstStr;
std::string MatchRegexp;
size_t SubstInsertIdx = RegExStr.size();
// Parse string variable or legacy @LINE expression.
if (!IsNumBlock) {
size_t VarEndIdx = MatchStr.find(':');
size_t SpacePos = MatchStr.substr(0, VarEndIdx).find_first_of(" \t");
if (SpacePos != StringRef::npos) {
SM.PrintMessage(SMLoc::getFromPointer(MatchStr.data() + SpacePos),
SourceMgr::DK_Error, "unexpected whitespace");
return true;
}
// Get the name (e.g. "foo") and verify it is well formed.
StringRef OrigMatchStr = MatchStr;
Expected<Pattern::VariableProperties> ParseVarResult =
parseVariable(MatchStr, SM);
if (!ParseVarResult) {
logAllUnhandledErrors(ParseVarResult.takeError(), errs());
return true;
}
StringRef Name = ParseVarResult->Name;
bool IsPseudo = ParseVarResult->IsPseudo;
IsDefinition = (VarEndIdx != StringRef::npos);
SubstNeeded = !IsDefinition;
if (IsDefinition) {
if ((IsPseudo || !MatchStr.consume_front(":"))) {
SM.PrintMessage(SMLoc::getFromPointer(Name.data()),
SourceMgr::DK_Error,
"invalid name in string variable definition");
return true;
}
// Detect collisions between string and numeric variables when the
// former is created later than the latter.
if (Context->GlobalNumericVariableTable.find(Name) !=
Context->GlobalNumericVariableTable.end()) {
SM.PrintMessage(
SMLoc::getFromPointer(Name.data()), SourceMgr::DK_Error,
"numeric variable with name '" + Name + "' already exists");
return true;
}
DefName = Name;
MatchRegexp = MatchStr.str();
} else {
if (IsPseudo) {
MatchStr = OrigMatchStr;
IsLegacyLineExpr = IsNumBlock = true;
} else {
if (!MatchStr.empty()) {
SM.PrintMessage(SMLoc::getFromPointer(Name.data()),
SourceMgr::DK_Error,
"invalid name in string variable use");
return true;
}
SubstStr = Name;
}
}
}
// Parse numeric substitution block.
std::unique_ptr<Expression> ExpressionPointer;
Optional<NumericVariable *> DefinedNumericVariable;
if (IsNumBlock) {
Expected<std::unique_ptr<Expression>> ParseResult =
parseNumericSubstitutionBlock(MatchStr, DefinedNumericVariable,
IsLegacyLineExpr, LineNumber, Context,
SM);
if (!ParseResult) {
logAllUnhandledErrors(ParseResult.takeError(), errs());
return true;
}
ExpressionPointer = std::move(*ParseResult);
SubstNeeded = ExpressionPointer->getAST() != nullptr;
if (DefinedNumericVariable) {
IsDefinition = true;
DefName = (*DefinedNumericVariable)->getName();
}
if (SubstNeeded)
SubstStr = MatchStr;
else {
ExpressionFormat Format = ExpressionPointer->getFormat();
MatchRegexp = cantFail(Format.getWildcardRegex());
}
}
// Handle variable definition: [[<def>:(...)]] and [[#(...)<def>:(...)]].
if (IsDefinition) {
RegExStr += '(';
++SubstInsertIdx;
if (IsNumBlock) {
NumericVariableMatch NumericVariableDefinition = {
*DefinedNumericVariable, CurParen};
NumericVariableDefs[DefName] = NumericVariableDefinition;
// This store is done here rather than in match() to allow
// parseNumericVariableUse() to get the pointer to the class instance
// of the right variable definition corresponding to a given numeric
// variable use.
Context->GlobalNumericVariableTable[DefName] =
*DefinedNumericVariable;
} else {
VariableDefs[DefName] = CurParen;
// Mark string variable as defined to detect collisions between
// string and numeric variables in parseNumericVariableUse() and
// defineCmdlineVariables() when the latter is created later than the
// former. We cannot reuse GlobalVariableTable for this by populating
// it with an empty string since we would then lose the ability to
// detect the use of an undefined variable in match().
Context->DefinedVariableTable[DefName] = true;
}
++CurParen;
}
if (!MatchRegexp.empty() && AddRegExToRegEx(MatchRegexp, CurParen, SM))
return true;
if (IsDefinition)
RegExStr += ')';
// Handle substitutions: [[foo]] and [[#<foo expr>]].
if (SubstNeeded) {
// Handle substitution of string variables that were defined earlier on
// the same line by emitting a backreference. Expressions do not
// support substituting a numeric variable defined on the same line.
if (!IsNumBlock && VariableDefs.find(SubstStr) != VariableDefs.end()) {
unsigned CaptureParenGroup = VariableDefs[SubstStr];
if (CaptureParenGroup < 1 || CaptureParenGroup > 9) {
SM.PrintMessage(SMLoc::getFromPointer(SubstStr.data()),
SourceMgr::DK_Error,
"Can't back-reference more than 9 variables");
return true;
}
AddBackrefToRegEx(CaptureParenGroup);
} else {
// Handle substitution of string variables ([[<var>]]) defined in
// previous CHECK patterns, and substitution of expressions.
Substitution *Substitution =
IsNumBlock
? Context->makeNumericSubstitution(
SubstStr, std::move(ExpressionPointer), SubstInsertIdx)
: Context->makeStringSubstitution(SubstStr, SubstInsertIdx);
Substitutions.push_back(Substitution);
}
}
}
// Handle fixed string matches.
// Find the end, which is the start of the next regex.
size_t FixedMatchEnd = PatternStr.find("{{");
FixedMatchEnd = std::min(FixedMatchEnd, PatternStr.find("[["));
RegExStr += Regex::escape(PatternStr.substr(0, FixedMatchEnd));
PatternStr = PatternStr.substr(FixedMatchEnd);
}
if (MatchFullLinesHere) {
if (!Req.NoCanonicalizeWhiteSpace)
RegExStr += " *";
RegExStr += '$';
}
return false;
}
bool Pattern::AddRegExToRegEx(StringRef RS, unsigned &CurParen, SourceMgr &SM) {
Regex R(RS);
std::string Error;
if (!R.isValid(Error)) {
SM.PrintMessage(SMLoc::getFromPointer(RS.data()), SourceMgr::DK_Error,
"invalid regex: " + Error);
return true;
}
RegExStr += RS.str();
CurParen += R.getNumMatches();
return false;
}
void Pattern::AddBackrefToRegEx(unsigned BackrefNum) {
assert(BackrefNum >= 1 && BackrefNum <= 9 && "Invalid backref number");
std::string Backref = std::string("\\") + std::string(1, '0' + BackrefNum);
RegExStr += Backref;
}
Pattern::MatchResult Pattern::match(StringRef Buffer,
const SourceMgr &SM) const {
// If this is the EOF pattern, match it immediately.
if (CheckTy == Check::CheckEOF)
return MatchResult(Buffer.size(), 0, Error::success());
// If this is a fixed string pattern, just match it now.
if (!FixedStr.empty()) {
size_t Pos =
IgnoreCase ? Buffer.find_insensitive(FixedStr) : Buffer.find(FixedStr);
if (Pos == StringRef::npos)
return make_error<NotFoundError>();
return MatchResult(Pos, /*MatchLen=*/FixedStr.size(), Error::success());
}
// Regex match.
// If there are substitutions, we need to create a temporary string with the
// actual value.
StringRef RegExToMatch = RegExStr;
std::string TmpStr;
if (!Substitutions.empty()) {
TmpStr = RegExStr;
if (LineNumber)
Context->LineVariable->setValue(ExpressionValue(*LineNumber));
size_t InsertOffset = 0;
// Substitute all string variables and expressions whose values are only
// now known. Use of string variables defined on the same line are handled
// by back-references.
Error Errs = Error::success();
for (const auto &Substitution : Substitutions) {
// Substitute and check for failure (e.g. use of undefined variable).
Expected<std::string> Value = Substitution->getResult();
if (!Value) {
// Convert to an ErrorDiagnostic to get location information. This is
// done here rather than printMatch/printNoMatch since now we know which
// substitution block caused the overflow.
Errs = joinErrors(std::move(Errs),
handleErrors(
Value.takeError(),
[&](const OverflowError &E) {
return ErrorDiagnostic::get(
SM, Substitution->getFromString(),
"unable to substitute variable or "
"numeric expression: overflow error");
},
[&SM](const UndefVarError &E) {
return ErrorDiagnostic::get(SM, E.getVarName(),
E.message());
}));
continue;
}
// Plop it into the regex at the adjusted offset.
TmpStr.insert(TmpStr.begin() + Substitution->getIndex() + InsertOffset,
Value->begin(), Value->end());
InsertOffset += Value->size();
}
if (Errs)
return std::move(Errs);
// Match the newly constructed regex.
RegExToMatch = TmpStr;
}
SmallVector<StringRef, 4> MatchInfo;
unsigned int Flags = Regex::Newline;
if (IgnoreCase)
Flags |= Regex::IgnoreCase;
if (!Regex(RegExToMatch, Flags).match(Buffer, &MatchInfo))
return make_error<NotFoundError>();
// Successful regex match.
assert(!MatchInfo.empty() && "Didn't get any match");
StringRef FullMatch = MatchInfo[0];
// If this defines any string variables, remember their values.
for (const auto &VariableDef : VariableDefs) {
assert(VariableDef.second < MatchInfo.size() && "Internal paren error");
Context->GlobalVariableTable[VariableDef.first] =
MatchInfo[VariableDef.second];
}
// Like CHECK-NEXT, CHECK-EMPTY's match range is considered to start after
// the required preceding newline, which is consumed by the pattern in the
// case of CHECK-EMPTY but not CHECK-NEXT.
size_t MatchStartSkip = CheckTy == Check::CheckEmpty;
Match TheMatch;
TheMatch.Pos = FullMatch.data() - Buffer.data() + MatchStartSkip;
TheMatch.Len = FullMatch.size() - MatchStartSkip;
// If this defines any numeric variables, remember their values.
for (const auto &NumericVariableDef : NumericVariableDefs) {
const NumericVariableMatch &NumericVariableMatch =
NumericVariableDef.getValue();
unsigned CaptureParenGroup = NumericVariableMatch.CaptureParenGroup;
assert(CaptureParenGroup < MatchInfo.size() && "Internal paren error");
NumericVariable *DefinedNumericVariable =
NumericVariableMatch.DefinedNumericVariable;
StringRef MatchedValue = MatchInfo[CaptureParenGroup];
ExpressionFormat Format = DefinedNumericVariable->getImplicitFormat();
Expected<ExpressionValue> Value =
Format.valueFromStringRepr(MatchedValue, SM);
if (!Value)
return MatchResult(TheMatch, Value.takeError());
DefinedNumericVariable->setValue(*Value, MatchedValue);
}
return MatchResult(TheMatch, Error::success());
}
unsigned Pattern::computeMatchDistance(StringRef Buffer) const {
// Just compute the number of matching characters. For regular expressions, we
// just compare against the regex itself and hope for the best.
//
// FIXME: One easy improvement here is have the regex lib generate a single
// example regular expression which matches, and use that as the example
// string.
StringRef ExampleString(FixedStr);
if (ExampleString.empty())
ExampleString = RegExStr;
// Only compare up to the first line in the buffer, or the string size.
StringRef BufferPrefix = Buffer.substr(0, ExampleString.size());
BufferPrefix = BufferPrefix.split('\n').first;
return BufferPrefix.edit_distance(ExampleString);
}
void Pattern::printSubstitutions(const SourceMgr &SM, StringRef Buffer,
SMRange Range,
FileCheckDiag::MatchType MatchTy,
std::vector<FileCheckDiag> *Diags) const {
// Print what we know about substitutions.
if (!Substitutions.empty()) {
for (const auto &Substitution : Substitutions) {
SmallString<256> Msg;
raw_svector_ostream OS(Msg);
Expected<std::string> MatchedValue = Substitution->getResult();
// Substitution failures are handled in printNoMatch().
if (!MatchedValue) {
consumeError(MatchedValue.takeError());
continue;
}
OS << "with \"";
OS.write_escaped(Substitution->getFromString()) << "\" equal to \"";
OS.write_escaped(*MatchedValue) << "\"";
// We report only the start of the match/search range to suggest we are
// reporting the substitutions as set at the start of the match/search.
// Indicating a non-zero-length range might instead seem to imply that the
// substitution matches or was captured from exactly that range.
if (Diags)
Diags->emplace_back(SM, CheckTy, getLoc(), MatchTy,
SMRange(Range.Start, Range.Start), OS.str());
else
SM.PrintMessage(Range.Start, SourceMgr::DK_Note, OS.str());
}
}
}
void Pattern::printVariableDefs(const SourceMgr &SM,
FileCheckDiag::MatchType MatchTy,
std::vector<FileCheckDiag> *Diags) const {
if (VariableDefs.empty() && NumericVariableDefs.empty())
return;
// Build list of variable captures.
struct VarCapture {
StringRef Name;
SMRange Range;
};
SmallVector<VarCapture, 2> VarCaptures;
for (const auto &VariableDef : VariableDefs) {
VarCapture VC;
VC.Name = VariableDef.first;
StringRef Value = Context->GlobalVariableTable[VC.Name];
SMLoc Start = SMLoc::getFromPointer(Value.data());
SMLoc End = SMLoc::getFromPointer(Value.data() + Value.size());
VC.Range = SMRange(Start, End);
VarCaptures.push_back(VC);
}
for (const auto &VariableDef : NumericVariableDefs) {
VarCapture VC;
VC.Name = VariableDef.getKey();
Optional<StringRef> StrValue =
VariableDef.getValue().DefinedNumericVariable->getStringValue();
if (!StrValue)
continue;
SMLoc Start = SMLoc::getFromPointer(StrValue->data());
SMLoc End = SMLoc::getFromPointer(StrValue->data() + StrValue->size());
VC.Range = SMRange(Start, End);
VarCaptures.push_back(VC);
}
// Sort variable captures by the order in which they matched the input.
// Ranges shouldn't be overlapping, so we can just compare the start.
llvm::sort(VarCaptures, [](const VarCapture &A, const VarCapture &B) {
assert(A.Range.Start != B.Range.Start &&
"unexpected overlapping variable captures");
return A.Range.Start.getPointer() < B.Range.Start.getPointer();
});
// Create notes for the sorted captures.
for (const VarCapture &VC : VarCaptures) {
SmallString<256> Msg;
raw_svector_ostream OS(Msg);
OS << "captured var \"" << VC.Name << "\"";
if (Diags)
Diags->emplace_back(SM, CheckTy, getLoc(), MatchTy, VC.Range, OS.str());
else
SM.PrintMessage(VC.Range.Start, SourceMgr::DK_Note, OS.str(), VC.Range);
}
}
static SMRange ProcessMatchResult(FileCheckDiag::MatchType MatchTy,
const SourceMgr &SM, SMLoc Loc,
Check::FileCheckType CheckTy,
StringRef Buffer, size_t Pos, size_t Len,
std::vector<FileCheckDiag> *Diags,
bool AdjustPrevDiags = false) {
SMLoc Start = SMLoc::getFromPointer(Buffer.data() + Pos);
SMLoc End = SMLoc::getFromPointer(Buffer.data() + Pos + Len);
SMRange Range(Start, End);
if (Diags) {
if (AdjustPrevDiags) {
SMLoc CheckLoc = Diags->rbegin()->CheckLoc;
for (auto I = Diags->rbegin(), E = Diags->rend();
I != E && I->CheckLoc == CheckLoc; ++I)
I->MatchTy = MatchTy;
} else
Diags->emplace_back(SM, CheckTy, Loc, MatchTy, Range);
}
return Range;
}
void Pattern::printFuzzyMatch(const SourceMgr &SM, StringRef Buffer,
std::vector<FileCheckDiag> *Diags) const {
// Attempt to find the closest/best fuzzy match. Usually an error happens
// because some string in the output didn't exactly match. In these cases, we
// would like to show the user a best guess at what "should have" matched, to
// save them having to actually check the input manually.
size_t NumLinesForward = 0;
size_t Best = StringRef::npos;
double BestQuality = 0;
// Use an arbitrary 4k limit on how far we will search.
for (size_t i = 0, e = std::min(size_t(4096), Buffer.size()); i != e; ++i) {
if (Buffer[i] == '\n')
++NumLinesForward;
// Patterns have leading whitespace stripped, so skip whitespace when
// looking for something which looks like a pattern.
if (Buffer[i] == ' ' || Buffer[i] == '\t')
continue;
// Compute the "quality" of this match as an arbitrary combination of the
// match distance and the number of lines skipped to get to this match.
unsigned Distance = computeMatchDistance(Buffer.substr(i));
double Quality = Distance + (NumLinesForward / 100.);
if (Quality < BestQuality || Best == StringRef::npos) {
Best = i;
BestQuality = Quality;
}
}
// Print the "possible intended match here" line if we found something
// reasonable and not equal to what we showed in the "scanning from here"
// line.
if (Best && Best != StringRef::npos && BestQuality < 50) {
SMRange MatchRange =
ProcessMatchResult(FileCheckDiag::MatchFuzzy, SM, getLoc(),
getCheckTy(), Buffer, Best, 0, Diags);
SM.PrintMessage(MatchRange.Start, SourceMgr::DK_Note,
"possible intended match here");
// FIXME: If we wanted to be really friendly we would show why the match
// failed, as it can be hard to spot simple one character differences.
}
}
Expected<StringRef>
FileCheckPatternContext::getPatternVarValue(StringRef VarName) {
auto VarIter = GlobalVariableTable.find(VarName);
if (VarIter == GlobalVariableTable.end())
return make_error<UndefVarError>(VarName);
return VarIter->second;
}
template <class... Types>
NumericVariable *FileCheckPatternContext::makeNumericVariable(Types... args) {
NumericVariables.push_back(std::make_unique<NumericVariable>(args...));
return NumericVariables.back().get();
}
Substitution *
FileCheckPatternContext::makeStringSubstitution(StringRef VarName,
size_t InsertIdx) {
Substitutions.push_back(
std::make_unique<StringSubstitution>(this, VarName, InsertIdx));
return Substitutions.back().get();
}
Substitution *FileCheckPatternContext::makeNumericSubstitution(
StringRef ExpressionStr, std::unique_ptr<Expression> Expression,
size_t InsertIdx) {
Substitutions.push_back(std::make_unique<NumericSubstitution>(
this, ExpressionStr, std::move(Expression), InsertIdx));
return Substitutions.back().get();
}
size_t Pattern::FindRegexVarEnd(StringRef Str, SourceMgr &SM) {
// Offset keeps track of the current offset within the input Str
size_t Offset = 0;
// [...] Nesting depth
size_t BracketDepth = 0;
while (!Str.empty()) {
if (Str.startswith("]]") && BracketDepth == 0)
return Offset;
if (Str[0] == '\\') {
// Backslash escapes the next char within regexes, so skip them both.
Str = Str.substr(2);
Offset += 2;
} else {
switch (Str[0]) {
default:
break;
case '[':
BracketDepth++;
break;
case ']':
if (BracketDepth == 0) {
SM.PrintMessage(SMLoc::getFromPointer(Str.data()),
SourceMgr::DK_Error,
"missing closing \"]\" for regex variable");
exit(1);
}
BracketDepth--;
break;
}
Str = Str.substr(1);
Offset++;
}
}
return StringRef::npos;
}
StringRef FileCheck::CanonicalizeFile(MemoryBuffer &MB,
SmallVectorImpl<char> &OutputBuffer) {
OutputBuffer.reserve(MB.getBufferSize());
for (const char *Ptr = MB.getBufferStart(), *End = MB.getBufferEnd();
Ptr != End; ++Ptr) {
// Eliminate trailing dosish \r.
if (Ptr <= End - 2 && Ptr[0] == '\r' && Ptr[1] == '\n') {
continue;
}
// If current char is not a horizontal whitespace or if horizontal
// whitespace canonicalization is disabled, dump it to output as is.
if (Req.NoCanonicalizeWhiteSpace || (*Ptr != ' ' && *Ptr != '\t')) {
OutputBuffer.push_back(*Ptr);
continue;
}
// Otherwise, add one space and advance over neighboring space.
OutputBuffer.push_back(' ');
while (Ptr + 1 != End && (Ptr[1] == ' ' || Ptr[1] == '\t'))
++Ptr;
}
// Add a null byte and then return all but that byte.
OutputBuffer.push_back('\0');
return StringRef(OutputBuffer.data(), OutputBuffer.size() - 1);
}
FileCheckDiag::FileCheckDiag(const SourceMgr &SM,
const Check::FileCheckType &CheckTy,
SMLoc CheckLoc, MatchType MatchTy,
SMRange InputRange, StringRef Note)
: CheckTy(CheckTy), CheckLoc(CheckLoc), MatchTy(MatchTy), Note(Note) {
auto Start = SM.getLineAndColumn(InputRange.Start);
auto End = SM.getLineAndColumn(InputRange.End);
InputStartLine = Start.first;
InputStartCol = Start.second;
InputEndLine = End.first;
InputEndCol = End.second;
}
static bool IsPartOfWord(char c) {
return (isAlnum(c) || c == '-' || c == '_');
}
Check::FileCheckType &Check::FileCheckType::setCount(int C) {
assert(Count > 0 && "zero and negative counts are not supported");
assert((C == 1 || Kind == CheckPlain) &&
"count supported only for plain CHECK directives");
Count = C;
return *this;
}
std::string Check::FileCheckType::getModifiersDescription() const {
if (Modifiers.none())
return "";
std::string Ret;
raw_string_ostream OS(Ret);
OS << '{';
if (isLiteralMatch())
OS << "LITERAL";
OS << '}';
return OS.str();
}
std::string Check::FileCheckType::getDescription(StringRef Prefix) const {
// Append directive modifiers.
auto WithModifiers = [this, Prefix](StringRef Str) -> std::string {
return (Prefix + Str + getModifiersDescription()).str();
};
switch (Kind) {
case Check::CheckNone:
return "invalid";
case Check::CheckPlain:
if (Count > 1)
return WithModifiers("-COUNT");
return WithModifiers("");
case Check::CheckNext:
return WithModifiers("-NEXT");
case Check::CheckSame:
return WithModifiers("-SAME");
case Check::CheckNot:
return WithModifiers("-NOT");
case Check::CheckDAG:
return WithModifiers("-DAG");
case Check::CheckLabel:
return WithModifiers("-LABEL");
case Check::CheckEmpty:
return WithModifiers("-EMPTY");
case Check::CheckComment:
return std::string(Prefix);
case Check::CheckEOF:
return "implicit EOF";
case Check::CheckBadNot:
return "bad NOT";
case Check::CheckBadCount:
return "bad COUNT";
}
llvm_unreachable("unknown FileCheckType");
}
static std::pair<Check::FileCheckType, StringRef>
FindCheckType(const FileCheckRequest &Req, StringRef Buffer, StringRef Prefix) {
if (Buffer.size() <= Prefix.size())
return {Check::CheckNone, StringRef()};
StringRef Rest = Buffer.drop_front(Prefix.size());
// Check for comment.
if (llvm::is_contained(Req.CommentPrefixes, Prefix)) {
if (Rest.consume_front(":"))
return {Check::CheckComment, Rest};
// Ignore a comment prefix if it has a suffix like "-NOT".
return {Check::CheckNone, StringRef()};
}
auto ConsumeModifiers = [&](Check::FileCheckType Ret)
-> std::pair<Check::FileCheckType, StringRef> {
if (Rest.consume_front(":"))
return {Ret, Rest};
if (!Rest.consume_front("{"))
return {Check::CheckNone, StringRef()};
// Parse the modifiers, speparated by commas.
do {
// Allow whitespace in modifiers list.
Rest = Rest.ltrim();
if (Rest.consume_front("LITERAL"))
Ret.setLiteralMatch();
else
return {Check::CheckNone, Rest};
// Allow whitespace in modifiers list.
Rest = Rest.ltrim();
} while (Rest.consume_front(","));
if (!Rest.consume_front("}:"))
return {Check::CheckNone, Rest};
return {Ret, Rest};
};
// Verify that the prefix is followed by directive modifiers or a colon.
if (Rest.consume_front(":"))
return {Check::CheckPlain, Rest};
if (Rest.front() == '{')
return ConsumeModifiers(Check::CheckPlain);
if (!Rest.consume_front("-"))
return {Check::CheckNone, StringRef()};
if (Rest.consume_front("COUNT-")) {
int64_t Count;
if (Rest.consumeInteger(10, Count))
// Error happened in parsing integer.
return {Check::CheckBadCount, Rest};
if (Count <= 0 || Count > INT32_MAX)
return {Check::CheckBadCount, Rest};
if (Rest.front() != ':' && Rest.front() != '{')
return {Check::CheckBadCount, Rest};
return ConsumeModifiers(
Check::FileCheckType(Check::CheckPlain).setCount(Count));
}
// You can't combine -NOT with another suffix.
if (Rest.startswith("DAG-NOT:") || Rest.startswith("NOT-DAG:") ||
Rest.startswith("NEXT-NOT:") || Rest.startswith("NOT-NEXT:") ||
Rest.startswith("SAME-NOT:") || Rest.startswith("NOT-SAME:") ||
Rest.startswith("EMPTY-NOT:") || Rest.startswith("NOT-EMPTY:"))
return {Check::CheckBadNot, Rest};
if (Rest.consume_front("NEXT"))
return ConsumeModifiers(Check::CheckNext);
if (Rest.consume_front("SAME"))
return ConsumeModifiers(Check::CheckSame);
if (Rest.consume_front("NOT"))
return ConsumeModifiers(Check::CheckNot);
if (Rest.consume_front("DAG"))
return ConsumeModifiers(Check::CheckDAG);
if (Rest.consume_front("LABEL"))
return ConsumeModifiers(Check::CheckLabel);
if (Rest.consume_front("EMPTY"))
return ConsumeModifiers(Check::CheckEmpty);
return {Check::CheckNone, Rest};
}
// From the given position, find the next character after the word.
static size_t SkipWord(StringRef Str, size_t Loc) {
while (Loc < Str.size() && IsPartOfWord(Str[Loc]))
++Loc;
return Loc;
}
/// Searches the buffer for the first prefix in the prefix regular expression.
///
/// This searches the buffer using the provided regular expression, however it
/// enforces constraints beyond that:
/// 1) The found prefix must not be a suffix of something that looks like
/// a valid prefix.
/// 2) The found prefix must be followed by a valid check type suffix using \c
/// FindCheckType above.
///
/// \returns a pair of StringRefs into the Buffer, which combines:
/// - the first match of the regular expression to satisfy these two is
/// returned,
/// otherwise an empty StringRef is returned to indicate failure.
/// - buffer rewound to the location right after parsed suffix, for parsing
/// to continue from
///
/// If this routine returns a valid prefix, it will also shrink \p Buffer to
/// start at the beginning of the returned prefix, increment \p LineNumber for
/// each new line consumed from \p Buffer, and set \p CheckTy to the type of
/// check found by examining the suffix.
///
/// If no valid prefix is found, the state of Buffer, LineNumber, and CheckTy
/// is unspecified.
static std::pair<StringRef, StringRef>
FindFirstMatchingPrefix(const FileCheckRequest &Req, Regex &PrefixRE,
StringRef &Buffer, unsigned &LineNumber,
Check::FileCheckType &CheckTy) {
SmallVector<StringRef, 2> Matches;
while (!Buffer.empty()) {
// Find the first (longest) match using the RE.
if (!PrefixRE.match(Buffer, &Matches))
// No match at all, bail.
return {StringRef(), StringRef()};
StringRef Prefix = Matches[0];
Matches.clear();
assert(Prefix.data() >= Buffer.data() &&
Prefix.data() < Buffer.data() + Buffer.size() &&
"Prefix doesn't start inside of buffer!");
size_t Loc = Prefix.data() - Buffer.data();
StringRef Skipped = Buffer.substr(0, Loc);
Buffer = Buffer.drop_front(Loc);
LineNumber += Skipped.count('\n');
// Check that the matched prefix isn't a suffix of some other check-like
// word.
// FIXME: This is a very ad-hoc check. it would be better handled in some
// other way. Among other things it seems hard to distinguish between
// intentional and unintentional uses of this feature.
if (Skipped.empty() || !IsPartOfWord(Skipped.back())) {
// Now extract the type.
StringRef AfterSuffix;
std::tie(CheckTy, AfterSuffix) = FindCheckType(Req, Buffer, Prefix);
// If we've found a valid check type for this prefix, we're done.
if (CheckTy != Check::CheckNone)
return {Prefix, AfterSuffix};
}
// If we didn't successfully find a prefix, we need to skip this invalid
// prefix and continue scanning. We directly skip the prefix that was
// matched and any additional parts of that check-like word.
Buffer = Buffer.drop_front(SkipWord(Buffer, Prefix.size()));
}
// We ran out of buffer while skipping partial matches so give up.
return {StringRef(), StringRef()};
}
void FileCheckPatternContext::createLineVariable() {
assert(!LineVariable && "@LINE pseudo numeric variable already created");
StringRef LineName = "@LINE";
LineVariable = makeNumericVariable(
LineName, ExpressionFormat(ExpressionFormat::Kind::Unsigned));
GlobalNumericVariableTable[LineName] = LineVariable;
}
FileCheck::FileCheck(FileCheckRequest Req)
: Req(Req), PatternContext(std::make_unique<FileCheckPatternContext>()),
CheckStrings(std::make_unique<std::vector<FileCheckString>>()) {}
FileCheck::~FileCheck() = default;
bool FileCheck::readCheckFile(
SourceMgr &SM, StringRef Buffer, Regex &PrefixRE,
std::pair<unsigned, unsigned> *ImpPatBufferIDRange) {
if (ImpPatBufferIDRange)
ImpPatBufferIDRange->first = ImpPatBufferIDRange->second = 0;
Error DefineError =
PatternContext->defineCmdlineVariables(Req.GlobalDefines, SM);
if (DefineError) {
logAllUnhandledErrors(std::move(DefineError), errs());
return true;
}
PatternContext->createLineVariable();
std::vector<Pattern> ImplicitNegativeChecks;
for (StringRef PatternString : Req.ImplicitCheckNot) {
// Create a buffer with fake command line content in order to display the
// command line option responsible for the specific implicit CHECK-NOT.
std::string Prefix = "-implicit-check-not='";
std::string Suffix = "'";
std::unique_ptr<MemoryBuffer> CmdLine = MemoryBuffer::getMemBufferCopy(
(Prefix + PatternString + Suffix).str(), "command line");
StringRef PatternInBuffer =
CmdLine->getBuffer().substr(Prefix.size(), PatternString.size());
unsigned BufferID = SM.AddNewSourceBuffer(std::move(CmdLine), SMLoc());
if (ImpPatBufferIDRange) {
if (ImpPatBufferIDRange->first == ImpPatBufferIDRange->second) {
ImpPatBufferIDRange->first = BufferID;
ImpPatBufferIDRange->second = BufferID + 1;
} else {
assert(BufferID == ImpPatBufferIDRange->second &&
"expected consecutive source buffer IDs");
++ImpPatBufferIDRange->second;
}
}
ImplicitNegativeChecks.push_back(
Pattern(Check::CheckNot, PatternContext.get()));
ImplicitNegativeChecks.back().parsePattern(PatternInBuffer,
"IMPLICIT-CHECK", SM, Req);
}
std::vector<Pattern> DagNotMatches = ImplicitNegativeChecks;
// LineNumber keeps track of the line on which CheckPrefix instances are
// found.
unsigned LineNumber = 1;
std::set<StringRef> PrefixesNotFound(Req.CheckPrefixes.begin(),
Req.CheckPrefixes.end());
const size_t DistinctPrefixes = PrefixesNotFound.size();
while (true) {
Check::FileCheckType CheckTy;
// See if a prefix occurs in the memory buffer.
StringRef UsedPrefix;
StringRef AfterSuffix;
std::tie(UsedPrefix, AfterSuffix) =
FindFirstMatchingPrefix(Req, PrefixRE, Buffer, LineNumber, CheckTy);
if (UsedPrefix.empty())
break;
if (CheckTy != Check::CheckComment)
PrefixesNotFound.erase(UsedPrefix);
assert(UsedPrefix.data() == Buffer.data() &&
"Failed to move Buffer's start forward, or pointed prefix outside "
"of the buffer!");
assert(AfterSuffix.data() >= Buffer.data() &&
AfterSuffix.data() < Buffer.data() + Buffer.size() &&
"Parsing after suffix doesn't start inside of buffer!");
// Location to use for error messages.
const char *UsedPrefixStart = UsedPrefix.data();
// Skip the buffer to the end of parsed suffix (or just prefix, if no good
// suffix was processed).
Buffer = AfterSuffix.empty() ? Buffer.drop_front(UsedPrefix.size())
: AfterSuffix;
// Complain about useful-looking but unsupported suffixes.
if (CheckTy == Check::CheckBadNot) {
SM.PrintMessage(SMLoc::getFromPointer(Buffer.data()), SourceMgr::DK_Error,
"unsupported -NOT combo on prefix '" + UsedPrefix + "'");
return true;
}
// Complain about invalid count specification.
if (CheckTy == Check::CheckBadCount) {
SM.PrintMessage(SMLoc::getFromPointer(Buffer.data()), SourceMgr::DK_Error,
"invalid count in -COUNT specification on prefix '" +
UsedPrefix + "'");
return true;
}
// Okay, we found the prefix, yay. Remember the rest of the line, but ignore
// leading whitespace.
if (!(Req.NoCanonicalizeWhiteSpace && Req.MatchFullLines))
Buffer = Buffer.substr(Buffer.find_first_not_of(" \t"));
// Scan ahead to the end of line.
size_t EOL = Buffer.find_first_of("\n\r");
// Remember the location of the start of the pattern, for diagnostics.
SMLoc PatternLoc = SMLoc::getFromPointer(Buffer.data());
// Extract the pattern from the buffer.
StringRef PatternBuffer = Buffer.substr(0, EOL);
Buffer = Buffer.substr(EOL);
// If this is a comment, we're done.
if (CheckTy == Check::CheckComment)
continue;
// Parse the pattern.
Pattern P(CheckTy, PatternContext.get(), LineNumber);
if (P.parsePattern(PatternBuffer, UsedPrefix, SM, Req))
return true;
// Verify that CHECK-LABEL lines do not define or use variables
if ((CheckTy == Check::CheckLabel) && P.hasVariable()) {
SM.PrintMessage(
SMLoc::getFromPointer(UsedPrefixStart), SourceMgr::DK_Error,
"found '" + UsedPrefix + "-LABEL:'"
" with variable definition or use");
return true;
}
// Verify that CHECK-NEXT/SAME/EMPTY lines have at least one CHECK line before them.
if ((CheckTy == Check::CheckNext || CheckTy == Check::CheckSame ||
CheckTy == Check::CheckEmpty) &&
CheckStrings->empty()) {
StringRef Type = CheckTy == Check::CheckNext
? "NEXT"
: CheckTy == Check::CheckEmpty ? "EMPTY" : "SAME";
SM.PrintMessage(SMLoc::getFromPointer(UsedPrefixStart),
SourceMgr::DK_Error,
"found '" + UsedPrefix + "-" + Type +
"' without previous '" + UsedPrefix + ": line");
return true;
}
// Handle CHECK-DAG/-NOT.
if (CheckTy == Check::CheckDAG || CheckTy == Check::CheckNot) {
DagNotMatches.push_back(P);
continue;
}
// Okay, add the string we captured to the output vector and move on.
CheckStrings->emplace_back(P, UsedPrefix, PatternLoc);
std::swap(DagNotMatches, CheckStrings->back().DagNotStrings);
DagNotMatches = ImplicitNegativeChecks;
}
// When there are no used prefixes we report an error except in the case that
// no prefix is specified explicitly but -implicit-check-not is specified.
const bool NoPrefixesFound = PrefixesNotFound.size() == DistinctPrefixes;
const bool SomePrefixesUnexpectedlyNotUsed =
!Req.AllowUnusedPrefixes && !PrefixesNotFound.empty();
if ((NoPrefixesFound || SomePrefixesUnexpectedlyNotUsed) &&
(ImplicitNegativeChecks.empty() || !Req.IsDefaultCheckPrefix)) {
errs() << "error: no check strings found with prefix"
<< (PrefixesNotFound.size() > 1 ? "es " : " ");
bool First = true;
for (StringRef MissingPrefix : PrefixesNotFound) {
if (!First)
errs() << ", ";
errs() << "\'" << MissingPrefix << ":'";
First = false;
}
errs() << '\n';
return true;
}
// Add an EOF pattern for any trailing --implicit-check-not/CHECK-DAG/-NOTs,
// and use the first prefix as a filler for the error message.
if (!DagNotMatches.empty()) {
CheckStrings->emplace_back(
Pattern(Check::CheckEOF, PatternContext.get(), LineNumber + 1),
*Req.CheckPrefixes.begin(), SMLoc::getFromPointer(Buffer.data()));
std::swap(DagNotMatches, CheckStrings->back().DagNotStrings);
}
return false;
}
/// Returns either (1) \c ErrorSuccess if there was no error or (2)
/// \c ErrorReported if an error was reported, such as an unexpected match.
static Error printMatch(bool ExpectedMatch, const SourceMgr &SM,
StringRef Prefix, SMLoc Loc, const Pattern &Pat,
int MatchedCount, StringRef Buffer,
Pattern::MatchResult MatchResult,
const FileCheckRequest &Req,
std::vector<FileCheckDiag> *Diags) {
// Suppress some verbosity if there's no error.
bool HasError = !ExpectedMatch || MatchResult.TheError;
bool PrintDiag = true;
if (!HasError) {
if (!Req.Verbose)
return ErrorReported::reportedOrSuccess(HasError);
if (!Req.VerboseVerbose && Pat.getCheckTy() == Check::CheckEOF)
return ErrorReported::reportedOrSuccess(HasError);
// Due to their verbosity, we don't print verbose diagnostics here if we're
// gathering them for Diags to be rendered elsewhere, but we always print
// other diagnostics.
PrintDiag = !Diags;
}
// Add "found" diagnostic, substitutions, and variable definitions to Diags.
FileCheckDiag::MatchType MatchTy = ExpectedMatch
? FileCheckDiag::MatchFoundAndExpected
: FileCheckDiag::MatchFoundButExcluded;
SMRange MatchRange = ProcessMatchResult(MatchTy, SM, Loc, Pat.getCheckTy(),
Buffer, MatchResult.TheMatch->Pos,
MatchResult.TheMatch->Len, Diags);
if (Diags) {
Pat.printSubstitutions(SM, Buffer, MatchRange, MatchTy, Diags);
Pat.printVariableDefs(SM, MatchTy, Diags);
}
if (!PrintDiag) {
assert(!HasError && "expected to report more diagnostics for error");
return ErrorReported::reportedOrSuccess(HasError);
}
// Print the match.
std::string Message = formatv("{0}: {1} string found in input",
Pat.getCheckTy().getDescription(Prefix),
(ExpectedMatch ? "expected" : "excluded"))
.str();
if (Pat.getCount() > 1)
Message += formatv(" ({0} out of {1})", MatchedCount, Pat.getCount()).str();
SM.PrintMessage(
Loc, ExpectedMatch ? SourceMgr::DK_Remark : SourceMgr::DK_Error, Message);
SM.PrintMessage(MatchRange.Start, SourceMgr::DK_Note, "found here",
{MatchRange});
// Print additional information, which can be useful even if there are errors.
Pat.printSubstitutions(SM, Buffer, MatchRange, MatchTy, nullptr);
Pat.printVariableDefs(SM, MatchTy, nullptr);
// Print errors and add them to Diags. We report these errors after the match
// itself because we found them after the match. If we had found them before
// the match, we'd be in printNoMatch.
handleAllErrors(std::move(MatchResult.TheError),
[&](const ErrorDiagnostic &E) {
E.log(errs());
if (Diags) {
Diags->emplace_back(SM, Pat.getCheckTy(), Loc,
FileCheckDiag::MatchFoundErrorNote,
E.getRange(), E.getMessage().str());
}
});
return ErrorReported::reportedOrSuccess(HasError);
}
/// Returns either (1) \c ErrorSuccess if there was no error, or (2)
/// \c ErrorReported if an error was reported, such as an expected match not
/// found.
static Error printNoMatch(bool ExpectedMatch, const SourceMgr &SM,
StringRef Prefix, SMLoc Loc, const Pattern &Pat,
int MatchedCount, StringRef Buffer, Error MatchError,
bool VerboseVerbose,
std::vector<FileCheckDiag> *Diags) {
// Print any pattern errors, and record them to be added to Diags later.
bool HasError = ExpectedMatch;
bool HasPatternError = false;
FileCheckDiag::MatchType MatchTy = ExpectedMatch
? FileCheckDiag::MatchNoneButExpected
: FileCheckDiag::MatchNoneAndExcluded;
SmallVector<std::string, 4> ErrorMsgs;
handleAllErrors(
std::move(MatchError),
[&](const ErrorDiagnostic &E) {
HasError = HasPatternError = true;
MatchTy = FileCheckDiag::MatchNoneForInvalidPattern;
E.log(errs());
if (Diags)
ErrorMsgs.push_back(E.getMessage().str());
},
// NotFoundError is why printNoMatch was invoked.
[](const NotFoundError &E) {});
// Suppress some verbosity if there's no error.
bool PrintDiag = true;
if (!HasError) {
if (!VerboseVerbose)
return ErrorReported::reportedOrSuccess(HasError);
// Due to their verbosity, we don't print verbose diagnostics here if we're
// gathering them for Diags to be rendered elsewhere, but we always print
// other diagnostics.
PrintDiag = !Diags;
}
// Add "not found" diagnostic, substitutions, and pattern errors to Diags.
//
// We handle Diags a little differently than the errors we print directly:
// we add the "not found" diagnostic to Diags even if there are pattern
// errors. The reason is that we need to attach pattern errors as notes
// somewhere in the input, and the input search range from the "not found"
// diagnostic is all we have to anchor them.
SMRange SearchRange = ProcessMatchResult(MatchTy, SM, Loc, Pat.getCheckTy(),
Buffer, 0, Buffer.size(), Diags);
if (Diags) {
SMRange NoteRange = SMRange(SearchRange.Start, SearchRange.Start);
for (StringRef ErrorMsg : ErrorMsgs)
Diags->emplace_back(SM, Pat.getCheckTy(), Loc, MatchTy, NoteRange,
ErrorMsg);
Pat.printSubstitutions(SM, Buffer, SearchRange, MatchTy, Diags);
}
if (!PrintDiag) {
assert(!HasError && "expected to report more diagnostics for error");
return ErrorReported::reportedOrSuccess(HasError);
}
// Print "not found" diagnostic, except that's implied if we already printed a
// pattern error.
if (!HasPatternError) {
std::string Message = formatv("{0}: {1} string not found in input",
Pat.getCheckTy().getDescription(Prefix),
(ExpectedMatch ? "expected" : "excluded"))
.str();
if (Pat.getCount() > 1)
Message +=
formatv(" ({0} out of {1})", MatchedCount, Pat.getCount()).str();
SM.PrintMessage(Loc,
ExpectedMatch ? SourceMgr::DK_Error : SourceMgr::DK_Remark,
Message);
SM.PrintMessage(SearchRange.Start, SourceMgr::DK_Note,
"scanning from here");
}
// Print additional information, which can be useful even after a pattern
// error.
Pat.printSubstitutions(SM, Buffer, SearchRange, MatchTy, nullptr);
if (ExpectedMatch)
Pat.printFuzzyMatch(SM, Buffer, Diags);
return ErrorReported::reportedOrSuccess(HasError);
}
/// Returns either (1) \c ErrorSuccess if there was no error, or (2)
/// \c ErrorReported if an error was reported.
static Error reportMatchResult(bool ExpectedMatch, const SourceMgr &SM,
StringRef Prefix, SMLoc Loc, const Pattern &Pat,
int MatchedCount, StringRef Buffer,
Pattern::MatchResult MatchResult,
const FileCheckRequest &Req,
std::vector<FileCheckDiag> *Diags) {
if (MatchResult.TheMatch)
return printMatch(ExpectedMatch, SM, Prefix, Loc, Pat, MatchedCount, Buffer,
std::move(MatchResult), Req, Diags);
return printNoMatch(ExpectedMatch, SM, Prefix, Loc, Pat, MatchedCount, Buffer,
std::move(MatchResult.TheError), Req.VerboseVerbose,
Diags);
}
/// Counts the number of newlines in the specified range.
static unsigned CountNumNewlinesBetween(StringRef Range,
const char *&FirstNewLine) {
unsigned NumNewLines = 0;
while (1) {
// Scan for newline.
Range = Range.substr(Range.find_first_of("\n\r"));
if (Range.empty())
return NumNewLines;
++NumNewLines;
// Handle \n\r and \r\n as a single newline.
if (Range.size() > 1 && (Range[1] == '\n' || Range[1] == '\r') &&
(Range[0] != Range[1]))
Range = Range.substr(1);
Range = Range.substr(1);
if (NumNewLines == 1)
FirstNewLine = Range.begin();
}
}
size_t FileCheckString::Check(const SourceMgr &SM, StringRef Buffer,
bool IsLabelScanMode, size_t &MatchLen,
FileCheckRequest &Req,
std::vector<FileCheckDiag> *Diags) const {
size_t LastPos = 0;
std::vector<const Pattern *> NotStrings;
// IsLabelScanMode is true when we are scanning forward to find CHECK-LABEL
// bounds; we have not processed variable definitions within the bounded block
// yet so cannot handle any final CHECK-DAG yet; this is handled when going
// over the block again (including the last CHECK-LABEL) in normal mode.
if (!IsLabelScanMode) {
// Match "dag strings" (with mixed "not strings" if any).
LastPos = CheckDag(SM, Buffer, NotStrings, Req, Diags);
if (LastPos == StringRef::npos)
return StringRef::npos;
}
// Match itself from the last position after matching CHECK-DAG.
size_t LastMatchEnd = LastPos;
size_t FirstMatchPos = 0;
// Go match the pattern Count times. Majority of patterns only match with
// count 1 though.
assert(Pat.getCount() != 0 && "pattern count can not be zero");
for (int i = 1; i <= Pat.getCount(); i++) {
StringRef MatchBuffer = Buffer.substr(LastMatchEnd);
// get a match at current start point
Pattern::MatchResult MatchResult = Pat.match(MatchBuffer, SM);
// report
if (Error Err = reportMatchResult(/*ExpectedMatch=*/true, SM, Prefix, Loc,
Pat, i, MatchBuffer,
std::move(MatchResult), Req, Diags)) {
cantFail(handleErrors(std::move(Err), [&](const ErrorReported &E) {}));
return StringRef::npos;
}
size_t MatchPos = MatchResult.TheMatch->Pos;
if (i == 1)
FirstMatchPos = LastPos + MatchPos;
// move start point after the match
LastMatchEnd += MatchPos + MatchResult.TheMatch->Len;
}
// Full match len counts from first match pos.
MatchLen = LastMatchEnd - FirstMatchPos;
// Similar to the above, in "label-scan mode" we can't yet handle CHECK-NEXT
// or CHECK-NOT
if (!IsLabelScanMode) {
size_t MatchPos = FirstMatchPos - LastPos;
StringRef MatchBuffer = Buffer.substr(LastPos);
StringRef SkippedRegion = Buffer.substr(LastPos, MatchPos);
// If this check is a "CHECK-NEXT", verify that the previous match was on
// the previous line (i.e. that there is one newline between them).
if (CheckNext(SM, SkippedRegion)) {
ProcessMatchResult(FileCheckDiag::MatchFoundButWrongLine, SM, Loc,
Pat.getCheckTy(), MatchBuffer, MatchPos, MatchLen,
Diags, Req.Verbose);
return StringRef::npos;
}
// If this check is a "CHECK-SAME", verify that the previous match was on
// the same line (i.e. that there is no newline between them).
if (CheckSame(SM, SkippedRegion)) {
ProcessMatchResult(FileCheckDiag::MatchFoundButWrongLine, SM, Loc,
Pat.getCheckTy(), MatchBuffer, MatchPos, MatchLen,
Diags, Req.Verbose);
return StringRef::npos;
}
// If this match had "not strings", verify that they don't exist in the
// skipped region.
if (CheckNot(SM, SkippedRegion, NotStrings, Req, Diags))
return StringRef::npos;
}
return FirstMatchPos;
}
bool FileCheckString::CheckNext(const SourceMgr &SM, StringRef Buffer) const {
if (Pat.getCheckTy() != Check::CheckNext &&
Pat.getCheckTy() != Check::CheckEmpty)
return false;
Twine CheckName =
Prefix +
Twine(Pat.getCheckTy() == Check::CheckEmpty ? "-EMPTY" : "-NEXT");
// Count the number of newlines between the previous match and this one.
const char *FirstNewLine = nullptr;
unsigned NumNewLines = CountNumNewlinesBetween(Buffer, FirstNewLine);
if (NumNewLines == 0) {
SM.PrintMessage(Loc, SourceMgr::DK_Error,
CheckName + ": is on the same line as previous match");
SM.PrintMessage(SMLoc::getFromPointer(Buffer.end()), SourceMgr::DK_Note,
"'next' match was here");
SM.PrintMessage(SMLoc::getFromPointer(Buffer.data()), SourceMgr::DK_Note,
"previous match ended here");
return true;
}
if (NumNewLines != 1) {
SM.PrintMessage(Loc, SourceMgr::DK_Error,
CheckName +
": is not on the line after the previous match");
SM.PrintMessage(SMLoc::getFromPointer(Buffer.end()), SourceMgr::DK_Note,
"'next' match was here");
SM.PrintMessage(SMLoc::getFromPointer(Buffer.data()), SourceMgr::DK_Note,
"previous match ended here");
SM.PrintMessage(SMLoc::getFromPointer(FirstNewLine), SourceMgr::DK_Note,
"non-matching line after previous match is here");
return true;
}
return false;
}
bool FileCheckString::CheckSame(const SourceMgr &SM, StringRef Buffer) const {
if (Pat.getCheckTy() != Check::CheckSame)
return false;
// Count the number of newlines between the previous match and this one.
const char *FirstNewLine = nullptr;
unsigned NumNewLines = CountNumNewlinesBetween(Buffer, FirstNewLine);
if (NumNewLines != 0) {
SM.PrintMessage(Loc, SourceMgr::DK_Error,
Prefix +
"-SAME: is not on the same line as the previous match");
SM.PrintMessage(SMLoc::getFromPointer(Buffer.end()), SourceMgr::DK_Note,
"'next' match was here");
SM.PrintMessage(SMLoc::getFromPointer(Buffer.data()), SourceMgr::DK_Note,
"previous match ended here");
return true;
}
return false;
}
bool FileCheckString::CheckNot(const SourceMgr &SM, StringRef Buffer,
const std::vector<const Pattern *> &NotStrings,
const FileCheckRequest &Req,
std::vector<FileCheckDiag> *Diags) const {
bool DirectiveFail = false;
for (const Pattern *Pat : NotStrings) {
assert((Pat->getCheckTy() == Check::CheckNot) && "Expect CHECK-NOT!");
Pattern::MatchResult MatchResult = Pat->match(Buffer, SM);
if (Error Err = reportMatchResult(/*ExpectedMatch=*/false, SM, Prefix,
Pat->getLoc(), *Pat, 1, Buffer,
std::move(MatchResult), Req, Diags)) {
cantFail(handleErrors(std::move(Err), [&](const ErrorReported &E) {}));
DirectiveFail = true;
continue;
}
}
return DirectiveFail;
}
size_t FileCheckString::CheckDag(const SourceMgr &SM, StringRef Buffer,
std::vector<const Pattern *> &NotStrings,
const FileCheckRequest &Req,
std::vector<FileCheckDiag> *Diags) const {
if (DagNotStrings.empty())
return 0;
// The start of the search range.
size_t StartPos = 0;
struct MatchRange {
size_t Pos;
size_t End;
};
// A sorted list of ranges for non-overlapping CHECK-DAG matches. Match
// ranges are erased from this list once they are no longer in the search
// range.
std::list<MatchRange> MatchRanges;
// We need PatItr and PatEnd later for detecting the end of a CHECK-DAG
// group, so we don't use a range-based for loop here.
for (auto PatItr = DagNotStrings.begin(), PatEnd = DagNotStrings.end();
PatItr != PatEnd; ++PatItr) {
const Pattern &Pat = *PatItr;
assert((Pat.getCheckTy() == Check::CheckDAG ||
Pat.getCheckTy() == Check::CheckNot) &&
"Invalid CHECK-DAG or CHECK-NOT!");
if (Pat.getCheckTy() == Check::CheckNot) {
NotStrings.push_back(&Pat);
continue;
}
assert((Pat.getCheckTy() == Check::CheckDAG) && "Expect CHECK-DAG!");
// CHECK-DAG always matches from the start.
size_t MatchLen = 0, MatchPos = StartPos;
// Search for a match that doesn't overlap a previous match in this
// CHECK-DAG group.
for (auto MI = MatchRanges.begin(), ME = MatchRanges.end(); true; ++MI) {
StringRef MatchBuffer = Buffer.substr(MatchPos);
Pattern::MatchResult MatchResult = Pat.match(MatchBuffer, SM);
// With a group of CHECK-DAGs, a single mismatching means the match on
// that group of CHECK-DAGs fails immediately.
if (MatchResult.TheError || Req.VerboseVerbose) {
if (Error Err = reportMatchResult(/*ExpectedMatch=*/true, SM, Prefix,
Pat.getLoc(), Pat, 1, MatchBuffer,
std::move(MatchResult), Req, Diags)) {
cantFail(
handleErrors(std::move(Err), [&](const ErrorReported &E) {}));
return StringRef::npos;
}
}
MatchLen = MatchResult.TheMatch->Len;
// Re-calc it as the offset relative to the start of the original
// string.
MatchPos += MatchResult.TheMatch->Pos;
MatchRange M{MatchPos, MatchPos + MatchLen};
if (Req.AllowDeprecatedDagOverlap) {
// We don't need to track all matches in this mode, so we just maintain
// one match range that encompasses the current CHECK-DAG group's
// matches.
if (MatchRanges.empty())
MatchRanges.insert(MatchRanges.end(), M);
else {
auto Block = MatchRanges.begin();
Block->Pos = std::min(Block->Pos, M.Pos);
Block->End = std::max(Block->End, M.End);
}
break;
}
// Iterate previous matches until overlapping match or insertion point.
bool Overlap = false;
for (; MI != ME; ++MI) {
if (M.Pos < MI->End) {
// !Overlap => New match has no overlap and is before this old match.
// Overlap => New match overlaps this old match.
Overlap = MI->Pos < M.End;
break;
}
}
if (!Overlap) {
// Insert non-overlapping match into list.
MatchRanges.insert(MI, M);
break;
}
if (Req.VerboseVerbose) {
// Due to their verbosity, we don't print verbose diagnostics here if
// we're gathering them for a different rendering, but we always print
// other diagnostics.
if (!Diags) {
SMLoc OldStart = SMLoc::getFromPointer(Buffer.data() + MI->Pos);
SMLoc OldEnd = SMLoc::getFromPointer(Buffer.data() + MI->End);
SMRange OldRange(OldStart, OldEnd);
SM.PrintMessage(OldStart, SourceMgr::DK_Note,
"match discarded, overlaps earlier DAG match here",
{OldRange});
} else {
SMLoc CheckLoc = Diags->rbegin()->CheckLoc;
for (auto I = Diags->rbegin(), E = Diags->rend();
I != E && I->CheckLoc == CheckLoc; ++I)
I->MatchTy = FileCheckDiag::MatchFoundButDiscarded;
}
}
MatchPos = MI->End;
}
if (!Req.VerboseVerbose)
cantFail(printMatch(
/*ExpectedMatch=*/true, SM, Prefix, Pat.getLoc(), Pat, 1, Buffer,
Pattern::MatchResult(MatchPos, MatchLen, Error::success()), Req,
Diags));
// Handle the end of a CHECK-DAG group.
if (std::next(PatItr) == PatEnd ||
std::next(PatItr)->getCheckTy() == Check::CheckNot) {
if (!NotStrings.empty()) {
// If there are CHECK-NOTs between two CHECK-DAGs or from CHECK to
// CHECK-DAG, verify that there are no 'not' strings occurred in that
// region.
StringRef SkippedRegion =
Buffer.slice(StartPos, MatchRanges.begin()->Pos);
if (CheckNot(SM, SkippedRegion, NotStrings, Req, Diags))
return StringRef::npos;
// Clear "not strings".
NotStrings.clear();
}
// All subsequent CHECK-DAGs and CHECK-NOTs should be matched from the
// end of this CHECK-DAG group's match range.
StartPos = MatchRanges.rbegin()->End;
// Don't waste time checking for (impossible) overlaps before that.
MatchRanges.clear();
}
}
return StartPos;
}
static bool ValidatePrefixes(StringRef Kind, StringSet<> &UniquePrefixes,
ArrayRef<StringRef> SuppliedPrefixes) {
for (StringRef Prefix : SuppliedPrefixes) {
if (Prefix.empty()) {
errs() << "error: supplied " << Kind << " prefix must not be the empty "
<< "string\n";
return false;
}
static const Regex Validator("^[a-zA-Z0-9_-]*$");
if (!Validator.match(Prefix)) {
errs() << "error: supplied " << Kind << " prefix must start with a "
<< "letter and contain only alphanumeric characters, hyphens, and "
<< "underscores: '" << Prefix << "'\n";
return false;
}
if (!UniquePrefixes.insert(Prefix).second) {
errs() << "error: supplied " << Kind << " prefix must be unique among "
<< "check and comment prefixes: '" << Prefix << "'\n";
return false;
}
}
return true;
}
static const char *DefaultCheckPrefixes[] = {"CHECK"};
static const char *DefaultCommentPrefixes[] = {"COM", "RUN"};
bool FileCheck::ValidateCheckPrefixes() {
StringSet<> UniquePrefixes;
// Add default prefixes to catch user-supplied duplicates of them below.
if (Req.CheckPrefixes.empty()) {
for (const char *Prefix : DefaultCheckPrefixes)
UniquePrefixes.insert(Prefix);
}
if (Req.CommentPrefixes.empty()) {
for (const char *Prefix : DefaultCommentPrefixes)
UniquePrefixes.insert(Prefix);
}
// Do not validate the default prefixes, or diagnostics about duplicates might
// incorrectly indicate that they were supplied by the user.
if (!ValidatePrefixes("check", UniquePrefixes, Req.CheckPrefixes))
return false;
if (!ValidatePrefixes("comment", UniquePrefixes, Req.CommentPrefixes))
return false;
return true;
}
Regex FileCheck::buildCheckPrefixRegex() {
if (Req.CheckPrefixes.empty()) {
for (const char *Prefix : DefaultCheckPrefixes)
Req.CheckPrefixes.push_back(Prefix);
Req.IsDefaultCheckPrefix = true;
}
if (Req.CommentPrefixes.empty()) {
for (const char *Prefix : DefaultCommentPrefixes)
Req.CommentPrefixes.push_back(Prefix);
}
// We already validated the contents of CheckPrefixes and CommentPrefixes so
// just concatenate them as alternatives.
SmallString<32> PrefixRegexStr;
for (size_t I = 0, E = Req.CheckPrefixes.size(); I != E; ++I) {
if (I != 0)
PrefixRegexStr.push_back('|');
PrefixRegexStr.append(Req.CheckPrefixes[I]);
}
for (StringRef Prefix : Req.CommentPrefixes) {
PrefixRegexStr.push_back('|');
PrefixRegexStr.append(Prefix);
}
return Regex(PrefixRegexStr);
}
Error FileCheckPatternContext::defineCmdlineVariables(
ArrayRef<StringRef> CmdlineDefines, SourceMgr &SM) {
assert(GlobalVariableTable.empty() && GlobalNumericVariableTable.empty() &&
"Overriding defined variable with command-line variable definitions");
if (CmdlineDefines.empty())
return Error::success();
// Create a string representing the vector of command-line definitions. Each
// definition is on its own line and prefixed with a definition number to
// clarify which definition a given diagnostic corresponds to.
unsigned I = 0;
Error Errs = Error::success();
std::string CmdlineDefsDiag;
SmallVector<std::pair<size_t, size_t>, 4> CmdlineDefsIndices;
for (StringRef CmdlineDef : CmdlineDefines) {
std::string DefPrefix = ("Global define #" + Twine(++I) + ": ").str();
size_t EqIdx = CmdlineDef.find('=');
if (EqIdx == StringRef::npos) {
CmdlineDefsIndices.push_back(std::make_pair(CmdlineDefsDiag.size(), 0));
continue;
}
// Numeric variable definition.
if (CmdlineDef[0] == '#') {
// Append a copy of the command-line definition adapted to use the same
// format as in the input file to be able to reuse
// parseNumericSubstitutionBlock.
CmdlineDefsDiag += (DefPrefix + CmdlineDef + " (parsed as: [[").str();
std::string SubstitutionStr = std::string(CmdlineDef);
SubstitutionStr[EqIdx] = ':';
CmdlineDefsIndices.push_back(
std::make_pair(CmdlineDefsDiag.size(), SubstitutionStr.size()));
CmdlineDefsDiag += (SubstitutionStr + Twine("]])\n")).str();
} else {
CmdlineDefsDiag += DefPrefix;
CmdlineDefsIndices.push_back(
std::make_pair(CmdlineDefsDiag.size(), CmdlineDef.size()));
CmdlineDefsDiag += (CmdlineDef + "\n").str();
}
}
// Create a buffer with fake command line content in order to display
// parsing diagnostic with location information and point to the
// global definition with invalid syntax.
std::unique_ptr<MemoryBuffer> CmdLineDefsDiagBuffer =
MemoryBuffer::getMemBufferCopy(CmdlineDefsDiag, "Global defines");
StringRef CmdlineDefsDiagRef = CmdLineDefsDiagBuffer->getBuffer();
SM.AddNewSourceBuffer(std::move(CmdLineDefsDiagBuffer), SMLoc());
for (std::pair<size_t, size_t> CmdlineDefIndices : CmdlineDefsIndices) {
StringRef CmdlineDef = CmdlineDefsDiagRef.substr(CmdlineDefIndices.first,
CmdlineDefIndices.second);
if (CmdlineDef.empty()) {
Errs = joinErrors(
std::move(Errs),
ErrorDiagnostic::get(SM, CmdlineDef,
"missing equal sign in global definition"));
continue;
}
// Numeric variable definition.
if (CmdlineDef[0] == '#') {
// Now parse the definition both to check that the syntax is correct and
// to create the necessary class instance.
StringRef CmdlineDefExpr = CmdlineDef.substr(1);
Optional<NumericVariable *> DefinedNumericVariable;
Expected<std::unique_ptr<Expression>> ExpressionResult =
Pattern::parseNumericSubstitutionBlock(
CmdlineDefExpr, DefinedNumericVariable, false, None, this, SM);
if (!ExpressionResult) {
Errs = joinErrors(std::move(Errs), ExpressionResult.takeError());
continue;
}
std::unique_ptr<Expression> Expression = std::move(*ExpressionResult);
// Now evaluate the expression whose value this variable should be set
// to, since the expression of a command-line variable definition should
// only use variables defined earlier on the command-line. If not, this
// is an error and we report it.
Expected<ExpressionValue> Value = Expression->getAST()->eval();
if (!Value) {
Errs = joinErrors(std::move(Errs), Value.takeError());
continue;
}
assert(DefinedNumericVariable && "No variable defined");
(*DefinedNumericVariable)->setValue(*Value);
// Record this variable definition.
GlobalNumericVariableTable[(*DefinedNumericVariable)->getName()] =
*DefinedNumericVariable;
} else {
// String variable definition.
std::pair<StringRef, StringRef> CmdlineNameVal = CmdlineDef.split('=');
StringRef CmdlineName = CmdlineNameVal.first;
StringRef OrigCmdlineName = CmdlineName;
Expected<Pattern::VariableProperties> ParseVarResult =
Pattern::parseVariable(CmdlineName, SM);
if (!ParseVarResult) {
Errs = joinErrors(std::move(Errs), ParseVarResult.takeError());
continue;
}
// Check that CmdlineName does not denote a pseudo variable is only
// composed of the parsed numeric variable. This catches cases like
// "FOO+2" in a "FOO+2=10" definition.
if (ParseVarResult->IsPseudo || !CmdlineName.empty()) {
Errs = joinErrors(std::move(Errs),
ErrorDiagnostic::get(
SM, OrigCmdlineName,
"invalid name in string variable definition '" +
OrigCmdlineName + "'"));
continue;
}
StringRef Name = ParseVarResult->Name;
// Detect collisions between string and numeric variables when the former
// is created later than the latter.
if (GlobalNumericVariableTable.find(Name) !=
GlobalNumericVariableTable.end()) {
Errs = joinErrors(std::move(Errs),
ErrorDiagnostic::get(SM, Name,
"numeric variable with name '" +
Name + "' already exists"));
continue;
}
GlobalVariableTable.insert(CmdlineNameVal);
// Mark the string variable as defined to detect collisions between
// string and numeric variables in defineCmdlineVariables when the latter
// is created later than the former. We cannot reuse GlobalVariableTable
// for this by populating it with an empty string since we would then
// lose the ability to detect the use of an undefined variable in
// match().
DefinedVariableTable[Name] = true;
}
}
return Errs;
}
void FileCheckPatternContext::clearLocalVars() {
SmallVector<StringRef, 16> LocalPatternVars, LocalNumericVars;
for (const StringMapEntry<StringRef> &Var : GlobalVariableTable)
if (Var.first()[0] != '$')
LocalPatternVars.push_back(Var.first());
// Numeric substitution reads the value of a variable directly, not via
// GlobalNumericVariableTable. Therefore, we clear local variables by
// clearing their value which will lead to a numeric substitution failure. We
// also mark the variable for removal from GlobalNumericVariableTable since
// this is what defineCmdlineVariables checks to decide that no global
// variable has been defined.
for (const auto &Var : GlobalNumericVariableTable)
if (Var.first()[0] != '$') {
Var.getValue()->clearValue();
LocalNumericVars.push_back(Var.first());
}
for (const auto &Var : LocalPatternVars)
GlobalVariableTable.erase(Var);
for (const auto &Var : LocalNumericVars)
GlobalNumericVariableTable.erase(Var);
}
bool FileCheck::checkInput(SourceMgr &SM, StringRef Buffer,
std::vector<FileCheckDiag> *Diags) {
bool ChecksFailed = false;
unsigned i = 0, j = 0, e = CheckStrings->size();
while (true) {
StringRef CheckRegion;
if (j == e) {
CheckRegion = Buffer;
} else {
const FileCheckString &CheckLabelStr = (*CheckStrings)[j];
if (CheckLabelStr.Pat.getCheckTy() != Check::CheckLabel) {
++j;
continue;
}
// Scan to next CHECK-LABEL match, ignoring CHECK-NOT and CHECK-DAG
size_t MatchLabelLen = 0;
size_t MatchLabelPos =
CheckLabelStr.Check(SM, Buffer, true, MatchLabelLen, Req, Diags);
if (MatchLabelPos == StringRef::npos)
// Immediately bail if CHECK-LABEL fails, nothing else we can do.
return false;
CheckRegion = Buffer.substr(0, MatchLabelPos + MatchLabelLen);
Buffer = Buffer.substr(MatchLabelPos + MatchLabelLen);
++j;
}
// Do not clear the first region as it's the one before the first
// CHECK-LABEL and it would clear variables defined on the command-line
// before they get used.
if (i != 0 && Req.EnableVarScope)
PatternContext->clearLocalVars();
for (; i != j; ++i) {
const FileCheckString &CheckStr = (*CheckStrings)[i];
// Check each string within the scanned region, including a second check
// of any final CHECK-LABEL (to verify CHECK-NOT and CHECK-DAG)
size_t MatchLen = 0;
size_t MatchPos =
CheckStr.Check(SM, CheckRegion, false, MatchLen, Req, Diags);
if (MatchPos == StringRef::npos) {
ChecksFailed = true;
i = j;
break;
}
CheckRegion = CheckRegion.substr(MatchPos + MatchLen);
}
if (j == e)
break;
}
// Success if no checks failed.
return !ChecksFailed;
}
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