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llvm-mirror/utils/FileCheck/FileCheck.cpp
Thomas Preud'homme df37872b97 [FileCheck] Do not skip end of line in diagnostics 
When commit da108b4ed4e6e7267701e76d5fd3b87609c9ab77 introduced
the CHECK-NEXT directive, it added logic to skip to the next line when
printing a diagnostic if the current matching position is at the end of
a line. This was fine while FileCheck did not support regular expression
but since it does now it can be confusing when the pattern to match
starts with the expectation of a newline (e.g. CHECK-NEXT: {{\n}}foo).
It is also inconsistent with the column information in the diagnostic
which does point to the end of line.

This commit removes this logic altogether, such that failure to match
diagnostic for such cases would show the end of line and be consistent
with the column information. The commit also adapts all existing
testcases accordingly.

Note to reviewers: An alternative approach would be to restrict the code
to only skip to the next line if the first character of the pattern is
known not to match a whitespace-like character. This would respect the
original intent but keep the inconsistency in terms of column info and
requires more code. I've only chosen this current approach by laziness
and would be happy to restrict the logic instead.

Reviewed By: jdenny, jhenderson

Differential Revision: https://reviews.llvm.org/D93341
2021-03-03 08:20:39 +00:00

878 lines
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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 program exits with an exit status of 2 on error, exit status of 0 if
// the file matched the expected contents, and exit status of 1 if it did not
// contain the expected contents.
//
//===----------------------------------------------------------------------===//
#include "llvm/FileCheck/FileCheck.h"
#include "llvm/Support/CommandLine.h"
#include "llvm/Support/InitLLVM.h"
#include "llvm/Support/Process.h"
#include "llvm/Support/WithColor.h"
#include "llvm/Support/raw_ostream.h"
#include <cmath>
using namespace llvm;
static cl::extrahelp FileCheckOptsEnv(
"\nOptions are parsed from the environment variable FILECHECK_OPTS and\n"
"from the command line.\n");
static cl::opt<std::string>
CheckFilename(cl::Positional, cl::desc("<check-file>"), cl::Optional);
static cl::opt<std::string>
InputFilename("input-file", cl::desc("File to check (defaults to stdin)"),
cl::init("-"), cl::value_desc("filename"));
static cl::list<std::string> CheckPrefixes(
"check-prefix",
cl::desc("Prefix to use from check file (defaults to 'CHECK')"));
static cl::alias CheckPrefixesAlias(
"check-prefixes", cl::aliasopt(CheckPrefixes), cl::CommaSeparated,
cl::NotHidden,
cl::desc(
"Alias for -check-prefix permitting multiple comma separated values"));
static cl::list<std::string> CommentPrefixes(
"comment-prefixes", cl::CommaSeparated, cl::Hidden,
cl::desc("Comma-separated list of comment prefixes to use from check file\n"
"(defaults to 'COM,RUN'). Please avoid using this feature in\n"
"LLVM's LIT-based test suites, which should be easier to\n"
"maintain if they all follow a consistent comment style. This\n"
"feature is meant for non-LIT test suites using FileCheck."));
static cl::opt<bool> NoCanonicalizeWhiteSpace(
"strict-whitespace",
cl::desc("Do not treat all horizontal whitespace as equivalent"));
static cl::opt<bool> IgnoreCase(
"ignore-case",
cl::desc("Use case-insensitive matching"));
static cl::list<std::string> ImplicitCheckNot(
"implicit-check-not",
cl::desc("Add an implicit negative check with this pattern to every\n"
"positive check. This can be used to ensure that no instances of\n"
"this pattern occur which are not matched by a positive pattern"),
cl::value_desc("pattern"));
static cl::list<std::string>
GlobalDefines("D", cl::AlwaysPrefix,
cl::desc("Define a variable to be used in capture patterns."),
cl::value_desc("VAR=VALUE"));
static cl::opt<bool> AllowEmptyInput(
"allow-empty", cl::init(false),
cl::desc("Allow the input file to be empty. This is useful when making\n"
"checks that some error message does not occur, for example."));
static cl::opt<bool> AllowUnusedPrefixes(
"allow-unused-prefixes", cl::init(false), cl::ZeroOrMore,
cl::desc("Allow prefixes to be specified but not appear in the test."));
static cl::opt<bool> MatchFullLines(
"match-full-lines", cl::init(false),
cl::desc("Require all positive matches to cover an entire input line.\n"
"Allows leading and trailing whitespace if --strict-whitespace\n"
"is not also passed."));
static cl::opt<bool> EnableVarScope(
"enable-var-scope", cl::init(false),
cl::desc("Enables scope for regex variables. Variables with names that\n"
"do not start with '$' will be reset at the beginning of\n"
"each CHECK-LABEL block."));
static cl::opt<bool> AllowDeprecatedDagOverlap(
"allow-deprecated-dag-overlap", cl::init(false),
cl::desc("Enable overlapping among matches in a group of consecutive\n"
"CHECK-DAG directives. This option is deprecated and is only\n"
"provided for convenience as old tests are migrated to the new\n"
"non-overlapping CHECK-DAG implementation.\n"));
static cl::opt<bool> Verbose(
"v", cl::init(false), cl::ZeroOrMore,
cl::desc("Print directive pattern matches, or add them to the input dump\n"
"if enabled.\n"));
static cl::opt<bool> VerboseVerbose(
"vv", cl::init(false), cl::ZeroOrMore,
cl::desc("Print information helpful in diagnosing internal FileCheck\n"
"issues, or add it to the input dump if enabled. Implies\n"
"-v.\n"));
// The order of DumpInputValue members affects their precedence, as documented
// for -dump-input below.
enum DumpInputValue {
DumpInputNever,
DumpInputFail,
DumpInputAlways,
DumpInputHelp
};
static cl::list<DumpInputValue> DumpInputs(
"dump-input",
cl::desc("Dump input to stderr, adding annotations representing\n"
"currently enabled diagnostics. When there are multiple\n"
"occurrences of this option, the <value> that appears earliest\n"
"in the list below has precedence. The default is 'fail'.\n"),
cl::value_desc("mode"),
cl::values(clEnumValN(DumpInputHelp, "help", "Explain input dump and quit"),
clEnumValN(DumpInputAlways, "always", "Always dump input"),
clEnumValN(DumpInputFail, "fail", "Dump input on failure"),
clEnumValN(DumpInputNever, "never", "Never dump input")));
// The order of DumpInputFilterValue members affects their precedence, as
// documented for -dump-input-filter below.
enum DumpInputFilterValue {
DumpInputFilterError,
DumpInputFilterAnnotation,
DumpInputFilterAnnotationFull,
DumpInputFilterAll
};
static cl::list<DumpInputFilterValue> DumpInputFilters(
"dump-input-filter",
cl::desc("In the dump requested by -dump-input, print only input lines of\n"
"kind <value> plus any context specified by -dump-input-context.\n"
"When there are multiple occurrences of this option, the <value>\n"
"that appears earliest in the list below has precedence. The\n"
"default is 'error' when -dump-input=fail, and it's 'all' when\n"
"-dump-input=always.\n"),
cl::values(clEnumValN(DumpInputFilterAll, "all", "All input lines"),
clEnumValN(DumpInputFilterAnnotationFull, "annotation-full",
"Input lines with annotations"),
clEnumValN(DumpInputFilterAnnotation, "annotation",
"Input lines with starting points of annotations"),
clEnumValN(DumpInputFilterError, "error",
"Input lines with starting points of error "
"annotations")));
static cl::list<unsigned> DumpInputContexts(
"dump-input-context", cl::value_desc("N"),
cl::desc("In the dump requested by -dump-input, print <N> input lines\n"
"before and <N> input lines after any lines specified by\n"
"-dump-input-filter. When there are multiple occurrences of\n"
"this option, the largest specified <N> has precedence. The\n"
"default is 5.\n"));
typedef cl::list<std::string>::const_iterator prefix_iterator;
static void DumpCommandLine(int argc, char **argv) {
errs() << "FileCheck command line: ";
for (int I = 0; I < argc; I++)
errs() << " " << argv[I];
errs() << "\n";
}
struct MarkerStyle {
/// The starting char (before tildes) for marking the line.
char Lead;
/// What color to use for this annotation.
raw_ostream::Colors Color;
/// A note to follow the marker, or empty string if none.
std::string Note;
/// Does this marker indicate inclusion by -dump-input-filter=error?
bool FiltersAsError;
MarkerStyle() {}
MarkerStyle(char Lead, raw_ostream::Colors Color,
const std::string &Note = "", bool FiltersAsError = false)
: Lead(Lead), Color(Color), Note(Note), FiltersAsError(FiltersAsError) {
assert((!FiltersAsError || !Note.empty()) &&
"expected error diagnostic to have note");
}
};
static MarkerStyle GetMarker(FileCheckDiag::MatchType MatchTy) {
switch (MatchTy) {
case FileCheckDiag::MatchFoundAndExpected:
return MarkerStyle('^', raw_ostream::GREEN);
case FileCheckDiag::MatchFoundButExcluded:
return MarkerStyle('!', raw_ostream::RED, "error: no match expected",
/*FiltersAsError=*/true);
case FileCheckDiag::MatchFoundButWrongLine:
return MarkerStyle('!', raw_ostream::RED, "error: match on wrong line",
/*FiltersAsError=*/true);
case FileCheckDiag::MatchFoundButDiscarded:
return MarkerStyle('!', raw_ostream::CYAN,
"discard: overlaps earlier match");
case FileCheckDiag::MatchNoneAndExcluded:
return MarkerStyle('X', raw_ostream::GREEN);
case FileCheckDiag::MatchNoneButExpected:
return MarkerStyle('X', raw_ostream::RED, "error: no match found",
/*FiltersAsError=*/true);
case FileCheckDiag::MatchFuzzy:
return MarkerStyle('?', raw_ostream::MAGENTA, "possible intended match",
/*FiltersAsError=*/true);
}
llvm_unreachable_internal("unexpected match type");
}
static void DumpInputAnnotationHelp(raw_ostream &OS) {
OS << "The following description was requested by -dump-input=help to\n"
<< "explain the input dump printed by FileCheck.\n"
<< "\n"
<< "Related command-line options:\n"
<< "\n"
<< " - -dump-input=<value> enables or disables the input dump\n"
<< " - -dump-input-filter=<value> filters the input lines\n"
<< " - -dump-input-context=<N> adjusts the context of filtered lines\n"
<< " - -v and -vv add more annotations\n"
<< " - -color forces colors to be enabled both in the dump and below\n"
<< " - -help documents the above options in more detail\n"
<< "\n"
<< "These options can also be set via FILECHECK_OPTS. For example, for\n"
<< "maximum debugging output on failures:\n"
<< "\n"
<< " $ FILECHECK_OPTS='-dump-input-filter=all -vv -color' ninja check\n"
<< "\n"
<< "Input dump annotation format:\n"
<< "\n";
// Labels for input lines.
OS << " - ";
WithColor(OS, raw_ostream::SAVEDCOLOR, true) << "L:";
OS << " labels line number L of the input file\n"
<< " An extra space is added after each input line to represent"
<< " the\n"
<< " newline character\n";
// Labels for annotation lines.
OS << " - ";
WithColor(OS, raw_ostream::SAVEDCOLOR, true) << "T:L";
OS << " labels the only match result for either (1) a pattern of type T"
<< " from\n"
<< " line L of the check file if L is an integer or (2) the"
<< " I-th implicit\n"
<< " pattern if L is \"imp\" followed by an integer "
<< "I (index origin one)\n";
OS << " - ";
WithColor(OS, raw_ostream::SAVEDCOLOR, true) << "T:L'N";
OS << " labels the Nth match result for such a pattern\n";
// Markers on annotation lines.
OS << " - ";
WithColor(OS, raw_ostream::SAVEDCOLOR, true) << "^~~";
OS << " marks good match (reported if -v)\n"
<< " - ";
WithColor(OS, raw_ostream::SAVEDCOLOR, true) << "!~~";
OS << " marks bad match, such as:\n"
<< " - CHECK-NEXT on same line as previous match (error)\n"
<< " - CHECK-NOT found (error)\n"
<< " - CHECK-DAG overlapping match (discarded, reported if "
<< "-vv)\n"
<< " - ";
WithColor(OS, raw_ostream::SAVEDCOLOR, true) << "X~~";
OS << " marks search range when no match is found, such as:\n"
<< " - CHECK-NEXT not found (error)\n"
<< " - CHECK-NOT not found (success, reported if -vv)\n"
<< " - CHECK-DAG not found after discarded matches (error)\n"
<< " - ";
WithColor(OS, raw_ostream::SAVEDCOLOR, true) << "?";
OS << " marks fuzzy match when no match is found\n";
// Elided lines.
OS << " - ";
WithColor(OS, raw_ostream::SAVEDCOLOR, true) << "...";
OS << " indicates elided input lines and annotations, as specified by\n"
<< " -dump-input-filter and -dump-input-context\n";
// Colors.
OS << " - colors ";
WithColor(OS, raw_ostream::GREEN, true) << "success";
OS << ", ";
WithColor(OS, raw_ostream::RED, true) << "error";
OS << ", ";
WithColor(OS, raw_ostream::MAGENTA, true) << "fuzzy match";
OS << ", ";
WithColor(OS, raw_ostream::CYAN, true, false) << "discarded match";
OS << ", ";
WithColor(OS, raw_ostream::CYAN, true, true) << "unmatched input";
OS << "\n";
}
/// An annotation for a single input line.
struct InputAnnotation {
/// The index of the match result across all checks
unsigned DiagIndex;
/// The label for this annotation.
std::string Label;
/// Is this the initial fragment of a diagnostic that has been broken across
/// multiple lines?
bool IsFirstLine;
/// What input line (one-origin indexing) this annotation marks. This might
/// be different from the starting line of the original diagnostic if
/// !IsFirstLine.
unsigned InputLine;
/// The column range (one-origin indexing, open end) in which to mark the
/// input line. If InputEndCol is UINT_MAX, treat it as the last column
/// before the newline.
unsigned InputStartCol, InputEndCol;
/// The marker to use.
MarkerStyle Marker;
/// Whether this annotation represents a good match for an expected pattern.
bool FoundAndExpectedMatch;
};
/// Get an abbreviation for the check type.
static std::string GetCheckTypeAbbreviation(Check::FileCheckType Ty) {
switch (Ty) {
case Check::CheckPlain:
if (Ty.getCount() > 1)
return "count";
return "check";
case Check::CheckNext:
return "next";
case Check::CheckSame:
return "same";
case Check::CheckNot:
return "not";
case Check::CheckDAG:
return "dag";
case Check::CheckLabel:
return "label";
case Check::CheckEmpty:
return "empty";
case Check::CheckComment:
return "com";
case Check::CheckEOF:
return "eof";
case Check::CheckBadNot:
return "bad-not";
case Check::CheckBadCount:
return "bad-count";
case Check::CheckNone:
llvm_unreachable("invalid FileCheckType");
}
llvm_unreachable("unknown FileCheckType");
}
static void
BuildInputAnnotations(const SourceMgr &SM, unsigned CheckFileBufferID,
const std::pair<unsigned, unsigned> &ImpPatBufferIDRange,
const std::vector<FileCheckDiag> &Diags,
std::vector<InputAnnotation> &Annotations,
unsigned &LabelWidth) {
// How many diagnostics have we seen so far?
unsigned DiagCount = 0;
// How many diagnostics has the current check seen so far?
unsigned CheckDiagCount = 0;
// What's the widest label?
LabelWidth = 0;
for (auto DiagItr = Diags.begin(), DiagEnd = Diags.end(); DiagItr != DiagEnd;
++DiagItr) {
InputAnnotation A;
A.DiagIndex = DiagCount++;
// Build label, which uniquely identifies this check result.
unsigned CheckBufferID = SM.FindBufferContainingLoc(DiagItr->CheckLoc);
auto CheckLineAndCol =
SM.getLineAndColumn(DiagItr->CheckLoc, CheckBufferID);
llvm::raw_string_ostream Label(A.Label);
Label << GetCheckTypeAbbreviation(DiagItr->CheckTy) << ":";
if (CheckBufferID == CheckFileBufferID)
Label << CheckLineAndCol.first;
else if (ImpPatBufferIDRange.first <= CheckBufferID &&
CheckBufferID < ImpPatBufferIDRange.second)
Label << "imp" << (CheckBufferID - ImpPatBufferIDRange.first + 1);
else
llvm_unreachable("expected diagnostic's check location to be either in "
"the check file or for an implicit pattern");
unsigned CheckDiagIndex = UINT_MAX;
auto DiagNext = std::next(DiagItr);
if (DiagNext != DiagEnd && DiagItr->CheckTy == DiagNext->CheckTy &&
DiagItr->CheckLoc == DiagNext->CheckLoc)
CheckDiagIndex = CheckDiagCount++;
else if (CheckDiagCount) {
CheckDiagIndex = CheckDiagCount;
CheckDiagCount = 0;
}
if (CheckDiagIndex != UINT_MAX)
Label << "'" << CheckDiagIndex;
Label.flush();
LabelWidth = std::max((std::string::size_type)LabelWidth, A.Label.size());
A.Marker = GetMarker(DiagItr->MatchTy);
if (!DiagItr->Note.empty()) {
A.Marker.Note = DiagItr->Note;
// It's less confusing if notes that don't actually have ranges don't have
// markers. For example, a marker for 'with "VAR" equal to "5"' would
// seem to indicate where "VAR" matches, but the location we actually have
// for the marker simply points to the start of the match/search range for
// the full pattern of which the substitution is potentially just one
// component.
if (DiagItr->InputStartLine == DiagItr->InputEndLine &&
DiagItr->InputStartCol == DiagItr->InputEndCol)
A.Marker.Lead = ' ';
}
A.FoundAndExpectedMatch =
DiagItr->MatchTy == FileCheckDiag::MatchFoundAndExpected;
// Compute the mark location, and break annotation into multiple
// annotations if it spans multiple lines.
A.IsFirstLine = true;
A.InputLine = DiagItr->InputStartLine;
A.InputStartCol = DiagItr->InputStartCol;
if (DiagItr->InputStartLine == DiagItr->InputEndLine) {
// Sometimes ranges are empty in order to indicate a specific point, but
// that would mean nothing would be marked, so adjust the range to
// include the following character.
A.InputEndCol =
std::max(DiagItr->InputStartCol + 1, DiagItr->InputEndCol);
Annotations.push_back(A);
} else {
assert(DiagItr->InputStartLine < DiagItr->InputEndLine &&
"expected input range not to be inverted");
A.InputEndCol = UINT_MAX;
Annotations.push_back(A);
for (unsigned L = DiagItr->InputStartLine + 1, E = DiagItr->InputEndLine;
L <= E; ++L) {
// If a range ends before the first column on a line, then it has no
// characters on that line, so there's nothing to render.
if (DiagItr->InputEndCol == 1 && L == E)
break;
InputAnnotation B;
B.DiagIndex = A.DiagIndex;
B.Label = A.Label;
B.IsFirstLine = false;
B.InputLine = L;
B.Marker = A.Marker;
B.Marker.Lead = '~';
B.Marker.Note = "";
B.InputStartCol = 1;
if (L != E)
B.InputEndCol = UINT_MAX;
else
B.InputEndCol = DiagItr->InputEndCol;
B.FoundAndExpectedMatch = A.FoundAndExpectedMatch;
Annotations.push_back(B);
}
}
}
}
static unsigned FindInputLineInFilter(
DumpInputFilterValue DumpInputFilter, unsigned CurInputLine,
const std::vector<InputAnnotation>::iterator &AnnotationBeg,
const std::vector<InputAnnotation>::iterator &AnnotationEnd) {
if (DumpInputFilter == DumpInputFilterAll)
return CurInputLine;
for (auto AnnotationItr = AnnotationBeg; AnnotationItr != AnnotationEnd;
++AnnotationItr) {
switch (DumpInputFilter) {
case DumpInputFilterAll:
llvm_unreachable("unexpected DumpInputFilterAll");
break;
case DumpInputFilterAnnotationFull:
return AnnotationItr->InputLine;
case DumpInputFilterAnnotation:
if (AnnotationItr->IsFirstLine)
return AnnotationItr->InputLine;
break;
case DumpInputFilterError:
if (AnnotationItr->IsFirstLine && AnnotationItr->Marker.FiltersAsError)
return AnnotationItr->InputLine;
break;
}
}
return UINT_MAX;
}
/// To OS, print a vertical ellipsis (right-justified at LabelWidth) if it would
/// occupy less lines than ElidedLines, but print ElidedLines otherwise. Either
/// way, clear ElidedLines. Thus, if ElidedLines is empty, do nothing.
static void DumpEllipsisOrElidedLines(raw_ostream &OS, std::string &ElidedLines,
unsigned LabelWidth) {
if (ElidedLines.empty())
return;
unsigned EllipsisLines = 3;
if (EllipsisLines < StringRef(ElidedLines).count('\n')) {
for (unsigned i = 0; i < EllipsisLines; ++i) {
WithColor(OS, raw_ostream::BLACK, /*Bold=*/true)
<< right_justify(".", LabelWidth);
OS << '\n';
}
} else
OS << ElidedLines;
ElidedLines.clear();
}
static void DumpAnnotatedInput(raw_ostream &OS, const FileCheckRequest &Req,
DumpInputFilterValue DumpInputFilter,
unsigned DumpInputContext,
StringRef InputFileText,
std::vector<InputAnnotation> &Annotations,
unsigned LabelWidth) {
OS << "Input was:\n<<<<<<\n";
// Sort annotations.
llvm::sort(Annotations,
[](const InputAnnotation &A, const InputAnnotation &B) {
// 1. Sort annotations in the order of the input lines.
//
// This makes it easier to find relevant annotations while
// iterating input lines in the implementation below. FileCheck
// does not always produce diagnostics in the order of input
// lines due to, for example, CHECK-DAG and CHECK-NOT.
if (A.InputLine != B.InputLine)
return A.InputLine < B.InputLine;
// 2. Sort annotations in the temporal order FileCheck produced
// their associated diagnostics.
//
// This sort offers several benefits:
//
// A. On a single input line, the order of annotations reflects
// the FileCheck logic for processing directives/patterns.
// This can be helpful in understanding cases in which the
// order of the associated directives/patterns in the check
// file or on the command line either (i) does not match the
// temporal order in which FileCheck looks for matches for the
// directives/patterns (due to, for example, CHECK-LABEL,
// CHECK-NOT, or `--implicit-check-not`) or (ii) does match
// that order but does not match the order of those
// diagnostics along an input line (due to, for example,
// CHECK-DAG).
//
// On the other hand, because our presentation format presents
// input lines in order, there's no clear way to offer the
// same benefit across input lines. For consistency, it might
// then seem worthwhile to have annotations on a single line
// also sorted in input order (that is, by input column).
// However, in practice, this appears to be more confusing
// than helpful. Perhaps it's intuitive to expect annotations
// to be listed in the temporal order in which they were
// produced except in cases the presentation format obviously
// and inherently cannot support it (that is, across input
// lines).
//
// B. When diagnostics' annotations are split among multiple
// input lines, the user must track them from one input line
// to the next. One property of the sort chosen here is that
// it facilitates the user in this regard by ensuring the
// following: when comparing any two input lines, a
// diagnostic's annotations are sorted in the same position
// relative to all other diagnostics' annotations.
return A.DiagIndex < B.DiagIndex;
});
// Compute the width of the label column.
const unsigned char *InputFilePtr = InputFileText.bytes_begin(),
*InputFileEnd = InputFileText.bytes_end();
unsigned LineCount = InputFileText.count('\n');
if (InputFileEnd[-1] != '\n')
++LineCount;
unsigned LineNoWidth = std::log10(LineCount) + 1;
// +3 below adds spaces (1) to the left of the (right-aligned) line numbers
// on input lines and (2) to the right of the (left-aligned) labels on
// annotation lines so that input lines and annotation lines are more
// visually distinct. For example, the spaces on the annotation lines ensure
// that input line numbers and check directive line numbers never align
// horizontally. Those line numbers might not even be for the same file.
// One space would be enough to achieve that, but more makes it even easier
// to see.
LabelWidth = std::max(LabelWidth, LineNoWidth) + 3;
// Print annotated input lines.
unsigned PrevLineInFilter = 0; // 0 means none so far
unsigned NextLineInFilter = 0; // 0 means uncomputed, UINT_MAX means none
std::string ElidedLines;
raw_string_ostream ElidedLinesOS(ElidedLines);
ColorMode TheColorMode =
WithColor(OS).colorsEnabled() ? ColorMode::Enable : ColorMode::Disable;
if (TheColorMode == ColorMode::Enable)
ElidedLinesOS.enable_colors(true);
auto AnnotationItr = Annotations.begin(), AnnotationEnd = Annotations.end();
for (unsigned Line = 1;
InputFilePtr != InputFileEnd || AnnotationItr != AnnotationEnd;
++Line) {
const unsigned char *InputFileLine = InputFilePtr;
// Compute the previous and next line included by the filter.
if (NextLineInFilter < Line)
NextLineInFilter = FindInputLineInFilter(DumpInputFilter, Line,
AnnotationItr, AnnotationEnd);
assert(NextLineInFilter && "expected NextLineInFilter to be computed");
if (NextLineInFilter == Line)
PrevLineInFilter = Line;
// Elide this input line and its annotations if it's not within the
// context specified by -dump-input-context of an input line included by
// -dump-input-filter. However, in case the resulting ellipsis would occupy
// more lines than the input lines and annotations it elides, buffer the
// elided lines and annotations so we can print them instead.
raw_ostream *LineOS = &OS;
if ((!PrevLineInFilter || PrevLineInFilter + DumpInputContext < Line) &&
(NextLineInFilter == UINT_MAX ||
Line + DumpInputContext < NextLineInFilter))
LineOS = &ElidedLinesOS;
else {
LineOS = &OS;
DumpEllipsisOrElidedLines(OS, ElidedLinesOS.str(), LabelWidth);
}
// Print right-aligned line number.
WithColor(*LineOS, raw_ostream::BLACK, /*Bold=*/true, /*BF=*/false,
TheColorMode)
<< format_decimal(Line, LabelWidth) << ": ";
// For the case where -v and colors are enabled, find the annotations for
// good matches for expected patterns in order to highlight everything
// else in the line. There are no such annotations if -v is disabled.
std::vector<InputAnnotation> FoundAndExpectedMatches;
if (Req.Verbose && TheColorMode == ColorMode::Enable) {
for (auto I = AnnotationItr; I != AnnotationEnd && I->InputLine == Line;
++I) {
if (I->FoundAndExpectedMatch)
FoundAndExpectedMatches.push_back(*I);
}
}
// Print numbered line with highlighting where there are no matches for
// expected patterns.
bool Newline = false;
{
WithColor COS(*LineOS, raw_ostream::SAVEDCOLOR, /*Bold=*/false,
/*BG=*/false, TheColorMode);
bool InMatch = false;
if (Req.Verbose)
COS.changeColor(raw_ostream::CYAN, true, true);
for (unsigned Col = 1; InputFilePtr != InputFileEnd && !Newline; ++Col) {
bool WasInMatch = InMatch;
InMatch = false;
for (auto M : FoundAndExpectedMatches) {
if (M.InputStartCol <= Col && Col < M.InputEndCol) {
InMatch = true;
break;
}
}
if (!WasInMatch && InMatch)
COS.resetColor();
else if (WasInMatch && !InMatch)
COS.changeColor(raw_ostream::CYAN, true, true);
if (*InputFilePtr == '\n') {
Newline = true;
COS << ' ';
} else
COS << *InputFilePtr;
++InputFilePtr;
}
}
*LineOS << '\n';
unsigned InputLineWidth = InputFilePtr - InputFileLine;
// Print any annotations.
while (AnnotationItr != AnnotationEnd &&
AnnotationItr->InputLine == Line) {
WithColor COS(*LineOS, AnnotationItr->Marker.Color, /*Bold=*/true,
/*BG=*/false, TheColorMode);
// The two spaces below are where the ": " appears on input lines.
COS << left_justify(AnnotationItr->Label, LabelWidth) << " ";
unsigned Col;
for (Col = 1; Col < AnnotationItr->InputStartCol; ++Col)
COS << ' ';
COS << AnnotationItr->Marker.Lead;
// If InputEndCol=UINT_MAX, stop at InputLineWidth.
for (++Col; Col < AnnotationItr->InputEndCol && Col <= InputLineWidth;
++Col)
COS << '~';
const std::string &Note = AnnotationItr->Marker.Note;
if (!Note.empty()) {
// Put the note at the end of the input line. If we were to instead
// put the note right after the marker, subsequent annotations for the
// same input line might appear to mark this note instead of the input
// line.
for (; Col <= InputLineWidth; ++Col)
COS << ' ';
COS << ' ' << Note;
}
COS << '\n';
++AnnotationItr;
}
}
DumpEllipsisOrElidedLines(OS, ElidedLinesOS.str(), LabelWidth);
OS << ">>>>>>\n";
}
int main(int argc, char **argv) {
// Enable use of ANSI color codes because FileCheck is using them to
// highlight text.
llvm::sys::Process::UseANSIEscapeCodes(true);
InitLLVM X(argc, argv);
cl::ParseCommandLineOptions(argc, argv, /*Overview*/ "", /*Errs*/ nullptr,
"FILECHECK_OPTS");
// Select -dump-input* values. The -help documentation specifies the default
// value and which value to choose if an option is specified multiple times.
// In the latter case, the general rule of thumb is to choose the value that
// provides the most information.
DumpInputValue DumpInput =
DumpInputs.empty()
? DumpInputFail
: *std::max_element(DumpInputs.begin(), DumpInputs.end());
DumpInputFilterValue DumpInputFilter;
if (DumpInputFilters.empty())
DumpInputFilter = DumpInput == DumpInputAlways ? DumpInputFilterAll
: DumpInputFilterError;
else
DumpInputFilter =
*std::max_element(DumpInputFilters.begin(), DumpInputFilters.end());
unsigned DumpInputContext = DumpInputContexts.empty()
? 5
: *std::max_element(DumpInputContexts.begin(),
DumpInputContexts.end());
if (DumpInput == DumpInputHelp) {
DumpInputAnnotationHelp(outs());
return 0;
}
if (CheckFilename.empty()) {
errs() << "<check-file> not specified\n";
return 2;
}
FileCheckRequest Req;
append_range(Req.CheckPrefixes, CheckPrefixes);
append_range(Req.CommentPrefixes, CommentPrefixes);
append_range(Req.ImplicitCheckNot, ImplicitCheckNot);
bool GlobalDefineError = false;
for (StringRef G : GlobalDefines) {
size_t EqIdx = G.find('=');
if (EqIdx == std::string::npos) {
errs() << "Missing equal sign in command-line definition '-D" << G
<< "'\n";
GlobalDefineError = true;
continue;
}
if (EqIdx == 0) {
errs() << "Missing variable name in command-line definition '-D" << G
<< "'\n";
GlobalDefineError = true;
continue;
}
Req.GlobalDefines.push_back(G);
}
if (GlobalDefineError)
return 2;
Req.AllowEmptyInput = AllowEmptyInput;
Req.AllowUnusedPrefixes = AllowUnusedPrefixes;
Req.EnableVarScope = EnableVarScope;
Req.AllowDeprecatedDagOverlap = AllowDeprecatedDagOverlap;
Req.Verbose = Verbose;
Req.VerboseVerbose = VerboseVerbose;
Req.NoCanonicalizeWhiteSpace = NoCanonicalizeWhiteSpace;
Req.MatchFullLines = MatchFullLines;
Req.IgnoreCase = IgnoreCase;
if (VerboseVerbose)
Req.Verbose = true;
FileCheck FC(Req);
if (!FC.ValidateCheckPrefixes())
return 2;
Regex PrefixRE = FC.buildCheckPrefixRegex();
std::string REError;
if (!PrefixRE.isValid(REError)) {
errs() << "Unable to combine check-prefix strings into a prefix regular "
"expression! This is likely a bug in FileCheck's verification of "
"the check-prefix strings. Regular expression parsing failed "
"with the following error: "
<< REError << "\n";
return 2;
}
SourceMgr SM;
// Read the expected strings from the check file.
ErrorOr<std::unique_ptr<MemoryBuffer>> CheckFileOrErr =
MemoryBuffer::getFileOrSTDIN(CheckFilename);
if (std::error_code EC = CheckFileOrErr.getError()) {
errs() << "Could not open check file '" << CheckFilename
<< "': " << EC.message() << '\n';
return 2;
}
MemoryBuffer &CheckFile = *CheckFileOrErr.get();
SmallString<4096> CheckFileBuffer;
StringRef CheckFileText = FC.CanonicalizeFile(CheckFile, CheckFileBuffer);
unsigned CheckFileBufferID =
SM.AddNewSourceBuffer(MemoryBuffer::getMemBuffer(
CheckFileText, CheckFile.getBufferIdentifier()),
SMLoc());
std::pair<unsigned, unsigned> ImpPatBufferIDRange;
if (FC.readCheckFile(SM, CheckFileText, PrefixRE, &ImpPatBufferIDRange))
return 2;
// Open the file to check and add it to SourceMgr.
ErrorOr<std::unique_ptr<MemoryBuffer>> InputFileOrErr =
MemoryBuffer::getFileOrSTDIN(InputFilename);
if (InputFilename == "-")
InputFilename = "<stdin>"; // Overwrite for improved diagnostic messages
if (std::error_code EC = InputFileOrErr.getError()) {
errs() << "Could not open input file '" << InputFilename
<< "': " << EC.message() << '\n';
return 2;
}
MemoryBuffer &InputFile = *InputFileOrErr.get();
if (InputFile.getBufferSize() == 0 && !AllowEmptyInput) {
errs() << "FileCheck error: '" << InputFilename << "' is empty.\n";
DumpCommandLine(argc, argv);
return 2;
}
SmallString<4096> InputFileBuffer;
StringRef InputFileText = FC.CanonicalizeFile(InputFile, InputFileBuffer);
SM.AddNewSourceBuffer(MemoryBuffer::getMemBuffer(
InputFileText, InputFile.getBufferIdentifier()),
SMLoc());
std::vector<FileCheckDiag> Diags;
int ExitCode = FC.checkInput(SM, InputFileText,
DumpInput == DumpInputNever ? nullptr : &Diags)
? EXIT_SUCCESS
: 1;
if (DumpInput == DumpInputAlways ||
(ExitCode == 1 && DumpInput == DumpInputFail)) {
errs() << "\n"
<< "Input file: " << InputFilename << "\n"
<< "Check file: " << CheckFilename << "\n"
<< "\n"
<< "-dump-input=help explains the following input dump.\n"
<< "\n";
std::vector<InputAnnotation> Annotations;
unsigned LabelWidth;
BuildInputAnnotations(SM, CheckFileBufferID, ImpPatBufferIDRange, Diags,
Annotations, LabelWidth);
DumpAnnotatedInput(errs(), Req, DumpInputFilter, DumpInputContext,
InputFileText, Annotations, LabelWidth);
}
return ExitCode;
}
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