r239665 - Add `-verify-ignore-unexpected` option to ignore unexpected diagnostics in VerifyDiagnosticsConsumer
Eric Fiselier
eric at efcs.ca
Sat Jun 13 09:32:41 PDT 2015
On Sat, Jun 13, 2015 at 12:16 PM, David Blaikie <dblaikie at gmail.com> wrote:
>
>
> On Sat, Jun 13, 2015 at 12:11 AM, Eric Fiselier <eric at efcs.ca> wrote:
>>
>> Author: ericwf
>> Date: Sat Jun 13 02:11:40 2015
>> New Revision: 239665
>>
>> URL: http://llvm.org/viewvc/llvm-project?rev=239665&view=rev
>> Log:
>> Add `-verify-ignore-unexpected` option to ignore unexpected diagnostics in
>> VerifyDiagnosticsConsumer
>>
>> Summary:
>> The goal of this patch is to make `-verify` easier to use when testing
>> libc++. The `notes` attached to compile error diagnostics are numerous and
>> relatively unstable when they reference libc++ header internals. This patch
>> allows libc++ to write stable compilation failure tests by allowing
>> unexpected diagnostic messages to be ignored where they are not relevant.
>
>
> Would it be better to have a flag that only ignores notes (or do we have a
> flag that disables notes? That might be generically useful?).
-verify-ignore-unexpected=note will only ignore notes.
> I'd be concerned that ignoring unexpected diagnostics could hide
> warnings/errors in libc++?
I agree with your concerns. Within libc++ I was only planning on
ignoring notes, and possibly
warnings in some contexts (C++11 extensions warnings for example).
However I felt that providing '-verify-ignore-unexpected' and
'-verify-ignore-unexpected=<Levels>'
was a better, more generic, solution than just providing something
like '-verify-ignore-unexpected-notes'.
/Eric
>
>>
>>
>> This patch adds a new CC1 flag called `-verify-ignore-unexpected`.
>> `-verify-ignore-unexpected` tells `VerifyDiagnosticsConsumer` to ignore
>> *all* unexpected diagnostic messages.
>> `-verify-ignore-unexpected=<LevelList>` can be used to only ignore certain
>> diagnostic levels. `<LevelList>` is a comma separated list of diagnostic
>> levels to ignore. The supported levels are `note`, `remark`, `warning` and
>> `error`.
>>
>>
>>
>> Reviewers: bogner, grosser, EricWF
>>
>> Reviewed By: EricWF
>>
>> Subscribers: cfe-commits
>>
>> Differential Revision: http://reviews.llvm.org/D10138
>>
>> Added:
>> cfe/trunk/lib/Basic/DiagnosticOptions.cpp
>> cfe/trunk/test/Frontend/verify-ignore-unexpected.c
>> Modified:
>> cfe/trunk/include/clang/Basic/DiagnosticOptions.def
>> cfe/trunk/include/clang/Basic/DiagnosticOptions.h
>> cfe/trunk/include/clang/Driver/CC1Options.td
>> cfe/trunk/lib/Basic/CMakeLists.txt
>> cfe/trunk/lib/Frontend/CompilerInvocation.cpp
>> cfe/trunk/lib/Frontend/VerifyDiagnosticConsumer.cpp
>>
>> Modified: cfe/trunk/include/clang/Basic/DiagnosticOptions.def
>> URL:
>> http://llvm.org/viewvc/llvm-project/cfe/trunk/include/clang/Basic/DiagnosticOptions.def?rev=239665&r1=239664&r2=239665&view=diff
>>
>> ==============================================================================
>> --- cfe/trunk/include/clang/Basic/DiagnosticOptions.def (original)
>> +++ cfe/trunk/include/clang/Basic/DiagnosticOptions.def Sat Jun 13
>> 02:11:40 2015
>> @@ -69,7 +69,10 @@ ENUM_DIAGOPT(ShowOverloads, OverloadsSho
>> DIAGOPT(VerifyDiagnostics, 1, 0) /// Check that diagnostics match the
>> expected
>> /// diagnostics, indicated by markers in
>> the
>> /// input source file.
>> -
>> +ENUM_DIAGOPT(VerifyIgnoreUnexpected, DiagnosticLevelMask, 4,
>> + DiagnosticLevelMask::None) /// Ignore unexpected diagnostics
>> of
>> + /// the specified levels when
>> using
>> + /// -verify.
>> DIAGOPT(ElideType, 1, 0) /// Elide identical types in template
>> diffing
>> DIAGOPT(ShowTemplateTree, 1, 0) /// Print a template tree when diffing
>> DIAGOPT(CLFallbackMode, 1, 0) /// Format for clang-cl fallback mode
>>
>> Modified: cfe/trunk/include/clang/Basic/DiagnosticOptions.h
>> URL:
>> http://llvm.org/viewvc/llvm-project/cfe/trunk/include/clang/Basic/DiagnosticOptions.h?rev=239665&r1=239664&r2=239665&view=diff
>>
>> ==============================================================================
>> --- cfe/trunk/include/clang/Basic/DiagnosticOptions.h (original)
>> +++ cfe/trunk/include/clang/Basic/DiagnosticOptions.h Sat Jun 13 02:11:40
>> 2015
>> @@ -13,6 +13,7 @@
>> #include "clang/Basic/LLVM.h"
>> #include "llvm/ADT/IntrusiveRefCntPtr.h"
>> #include <string>
>> +#include <type_traits>
>> #include <vector>
>>
>> namespace clang {
>> @@ -24,6 +25,38 @@ enum OverloadsShown : unsigned {
>> Ovl_Best ///< Show just the "best" overload candidates.
>> };
>>
>> +/// \brief A bitmask representing the diagnostic levels used by
>> +/// VerifyDiagnosticConsumer.
>> +enum class DiagnosticLevelMask : unsigned {
>> + None = 0,
>> + Note = 1 << 0,
>> + Remark = 1 << 1,
>> + Warning = 1 << 2,
>> + Error = 1 << 3,
>> + All = Note | Remark | Warning | Error
>> +};
>> +
>> +inline DiagnosticLevelMask operator~(DiagnosticLevelMask M) {
>> + using UT = std::underlying_type<DiagnosticLevelMask>::type;
>> + return static_cast<DiagnosticLevelMask>(~static_cast<UT>(M));
>> +}
>> +
>> +inline DiagnosticLevelMask operator|(DiagnosticLevelMask LHS,
>> + DiagnosticLevelMask RHS) {
>> + using UT = std::underlying_type<DiagnosticLevelMask>::type;
>> + return static_cast<DiagnosticLevelMask>(
>> + static_cast<UT>(LHS) | static_cast<UT>(RHS));
>> +}
>> +
>> +inline DiagnosticLevelMask operator&(DiagnosticLevelMask LHS,
>> + DiagnosticLevelMask RHS) {
>> + using UT = std::underlying_type<DiagnosticLevelMask>::type;
>> + return static_cast<DiagnosticLevelMask>(
>> + static_cast<UT>(LHS) & static_cast<UT>(RHS));
>> +}
>> +
>> +raw_ostream& operator<<(raw_ostream& Out, DiagnosticLevelMask M);
>> +
>> /// \brief Options for controlling the compiler diagnostics engine.
>> class DiagnosticOptions : public RefCountedBase<DiagnosticOptions>{
>> public:
>>
>> Modified: cfe/trunk/include/clang/Driver/CC1Options.td
>> URL:
>> http://llvm.org/viewvc/llvm-project/cfe/trunk/include/clang/Driver/CC1Options.td?rev=239665&r1=239664&r2=239665&view=diff
>>
>> ==============================================================================
>> --- cfe/trunk/include/clang/Driver/CC1Options.td (original)
>> +++ cfe/trunk/include/clang/Driver/CC1Options.td Sat Jun 13 02:11:40 2015
>> @@ -301,6 +301,10 @@ def fmessage_length : Separate<["-"], "f
>> HelpText<"Format message diagnostics so that they fit within N columns
>> or fewer, when possible.">;
>> def verify : Flag<["-"], "verify">,
>> HelpText<"Verify diagnostic output using comment directives">;
>> +def verify_ignore_unexpected : Flag<["-"], "verify-ignore-unexpected">,
>> + HelpText<"Ignore unexpected diagnostic messages">;
>> +def verify_ignore_unexpected_EQ : CommaJoined<["-"],
>> "verify-ignore-unexpected=">,
>> + HelpText<"Ignore unexpected diagnostic messages">;
>> def Wno_rewrite_macros : Flag<["-"], "Wno-rewrite-macros">,
>> HelpText<"Silence ObjC rewriting warnings">;
>>
>>
>> Modified: cfe/trunk/lib/Basic/CMakeLists.txt
>> URL:
>> http://llvm.org/viewvc/llvm-project/cfe/trunk/lib/Basic/CMakeLists.txt?rev=239665&r1=239664&r2=239665&view=diff
>>
>> ==============================================================================
>> --- cfe/trunk/lib/Basic/CMakeLists.txt (original)
>> +++ cfe/trunk/lib/Basic/CMakeLists.txt Sat Jun 13 02:11:40 2015
>> @@ -61,6 +61,7 @@ add_clang_library(clangBasic
>> CharInfo.cpp
>> Diagnostic.cpp
>> DiagnosticIDs.cpp
>> + DiagnosticOptions.cpp
>> FileManager.cpp
>> FileSystemStatCache.cpp
>> IdentifierTable.cpp
>>
>> Added: cfe/trunk/lib/Basic/DiagnosticOptions.cpp
>> URL:
>> http://llvm.org/viewvc/llvm-project/cfe/trunk/lib/Basic/DiagnosticOptions.cpp?rev=239665&view=auto
>>
>> ==============================================================================
>> --- cfe/trunk/lib/Basic/DiagnosticOptions.cpp (added)
>> +++ cfe/trunk/lib/Basic/DiagnosticOptions.cpp Sat Jun 13 02:11:40 2015
>> @@ -0,0 +1,24 @@
>> +//===--- DiagnosticOptions.cpp - C Language Family Diagnostic Handling
>> ----===//
>> +//
>> +// The LLVM Compiler Infrastructure
>> +//
>> +// This file is distributed under the University of Illinois Open Source
>> +// License. See LICENSE.TXT for details.
>> +//
>>
>> +//===----------------------------------------------------------------------===//
>> +//
>> +// This file implements the DiagnosticOptions related interfaces.
>> +//
>>
>> +//===----------------------------------------------------------------------===//
>> +
>> +#include "clang/Basic/DiagnosticOptions.h"
>> +#include "llvm/Support/raw_ostream.h"
>> +
>> +namespace clang {
>> +
>> +raw_ostream& operator<<(raw_ostream& Out, DiagnosticLevelMask M) {
>> + using UT = std::underlying_type<DiagnosticLevelMask>::type;
>> + return Out << static_cast<UT>(M);
>> +}
>> +
>> +} // end namespace clang
>>
>> Modified: cfe/trunk/lib/Frontend/CompilerInvocation.cpp
>> URL:
>> http://llvm.org/viewvc/llvm-project/cfe/trunk/lib/Frontend/CompilerInvocation.cpp?rev=239665&r1=239664&r2=239665&view=diff
>>
>> ==============================================================================
>> --- cfe/trunk/lib/Frontend/CompilerInvocation.cpp (original)
>> +++ cfe/trunk/lib/Frontend/CompilerInvocation.cpp Sat Jun 13 02:11:40 2015
>> @@ -321,6 +321,29 @@ GenerateOptimizationRemarkRegex(Diagnost
>> return Pattern;
>> }
>>
>> +static bool parseDiagnosticLevelMask(StringRef FlagName,
>> + const std::vector<std::string>
>> &Levels,
>> + DiagnosticsEngine *Diags,
>> + DiagnosticLevelMask &M) {
>> + bool Success = true;
>> + for (const auto &Level : Levels) {
>> + DiagnosticLevelMask const PM =
>> + llvm::StringSwitch<DiagnosticLevelMask>(Level)
>> + .Case("note", DiagnosticLevelMask::Note)
>> + .Case("remark", DiagnosticLevelMask::Remark)
>> + .Case("warning", DiagnosticLevelMask::Warning)
>> + .Case("error", DiagnosticLevelMask::Error)
>> + .Default(DiagnosticLevelMask::None);
>> + if (PM == DiagnosticLevelMask::None) {
>> + Success = false;
>> + if (Diags)
>> + Diags->Report(diag::err_drv_invalid_value) << FlagName << Level;
>> + }
>> + M = M | PM;
>> + }
>> + return Success;
>> +}
>> +
>> static void parseSanitizerKinds(StringRef FlagName,
>> const std::vector<std::string>
>> &Sanitizers,
>> DiagnosticsEngine &Diags, SanitizerSet
>> &S) {
>> @@ -748,11 +771,18 @@ bool clang::ParseDiagnosticArgs(Diagnost
>> << Args.getLastArg(OPT_fdiagnostics_format)->getAsString(Args)
>> << Format;
>> }
>> -
>> +
>> Opts.ShowSourceRanges =
>> Args.hasArg(OPT_fdiagnostics_print_source_range_info);
>> Opts.ShowParseableFixits =
>> Args.hasArg(OPT_fdiagnostics_parseable_fixits);
>> Opts.ShowPresumedLoc =
>> !Args.hasArg(OPT_fno_diagnostics_use_presumed_location);
>> Opts.VerifyDiagnostics = Args.hasArg(OPT_verify);
>> + DiagnosticLevelMask DiagMask = DiagnosticLevelMask::None;
>> + Success &= parseDiagnosticLevelMask("-verify-ignore-unexpected=",
>> + Args.getAllArgValues(OPT_verify_ignore_unexpected_EQ),
>> + Diags, DiagMask);
>> + if (Args.hasArg(OPT_verify_ignore_unexpected))
>> + DiagMask = DiagnosticLevelMask::All;
>> + Opts.setVerifyIgnoreUnexpected(DiagMask);
>> Opts.ElideType = !Args.hasArg(OPT_fno_elide_type);
>> Opts.ShowTemplateTree =
>> Args.hasArg(OPT_fdiagnostics_show_template_tree);
>> Opts.ErrorLimit = getLastArgIntValue(Args, OPT_ferror_limit, 0, Diags);
>>
>> Modified: cfe/trunk/lib/Frontend/VerifyDiagnosticConsumer.cpp
>> URL:
>> http://llvm.org/viewvc/llvm-project/cfe/trunk/lib/Frontend/VerifyDiagnosticConsumer.cpp?rev=239665&r1=239664&r2=239665&view=diff
>>
>> ==============================================================================
>> --- cfe/trunk/lib/Frontend/VerifyDiagnosticConsumer.cpp (original)
>> +++ cfe/trunk/lib/Frontend/VerifyDiagnosticConsumer.cpp Sat Jun 13
>> 02:11:40 2015
>> @@ -691,7 +691,8 @@ static unsigned CheckLists(DiagnosticsEn
>> const char *Label,
>> DirectiveList &Left,
>> const_diag_iterator d2_begin,
>> - const_diag_iterator d2_end) {
>> + const_diag_iterator d2_end,
>> + bool IgnoreUnexpected) {
>> std::vector<Directive *> LeftOnly;
>> DiagList Right(d2_begin, d2_end);
>>
>> @@ -727,7 +728,8 @@ static unsigned CheckLists(DiagnosticsEn
>> }
>> // Now all that's left in Right are those that were not matched.
>> unsigned num = PrintExpected(Diags, SourceMgr, LeftOnly, Label);
>> - num += PrintUnexpected(Diags, &SourceMgr, Right.begin(), Right.end(),
>> Label);
>> + if (!IgnoreUnexpected)
>> + num += PrintUnexpected(Diags, &SourceMgr, Right.begin(), Right.end(),
>> Label);
>> return num;
>> }
>>
>> @@ -745,21 +747,28 @@ static unsigned CheckResults(Diagnostics
>> // Seen \ Expected - set seen but not expected
>> unsigned NumProblems = 0;
>>
>> + const DiagnosticLevelMask DiagMask =
>> + Diags.getDiagnosticOptions().getVerifyIgnoreUnexpected();
>> +
>> // See if there are error mismatches.
>> NumProblems += CheckLists(Diags, SourceMgr, "error", ED.Errors,
>> - Buffer.err_begin(), Buffer.err_end());
>> + Buffer.err_begin(), Buffer.err_end(),
>> + bool(DiagnosticLevelMask::Error & DiagMask));
>>
>> // See if there are warning mismatches.
>> NumProblems += CheckLists(Diags, SourceMgr, "warning", ED.Warnings,
>> - Buffer.warn_begin(), Buffer.warn_end());
>> + Buffer.warn_begin(), Buffer.warn_end(),
>> + bool(DiagnosticLevelMask::Warning &
>> DiagMask));
>>
>> // See if there are remark mismatches.
>> NumProblems += CheckLists(Diags, SourceMgr, "remark", ED.Remarks,
>> - Buffer.remark_begin(), Buffer.remark_end());
>> + Buffer.remark_begin(), Buffer.remark_end(),
>> + bool(DiagnosticLevelMask::Remark &
>> DiagMask));
>>
>> // See if there are note mismatches.
>> NumProblems += CheckLists(Diags, SourceMgr, "note", ED.Notes,
>> - Buffer.note_begin(), Buffer.note_end());
>> + Buffer.note_begin(), Buffer.note_end(),
>> + bool(DiagnosticLevelMask::Note & DiagMask));
>>
>> return NumProblems;
>> }
>> @@ -854,12 +863,20 @@ void VerifyDiagnosticConsumer::CheckDiag
>> // Check that the expected diagnostics occurred.
>> NumErrors += CheckResults(Diags, *SrcManager, *Buffer, ED);
>> } else {
>> - NumErrors += (PrintUnexpected(Diags, nullptr, Buffer->err_begin(),
>> - Buffer->err_end(), "error") +
>> - PrintUnexpected(Diags, nullptr, Buffer->warn_begin(),
>> - Buffer->warn_end(), "warn") +
>> - PrintUnexpected(Diags, nullptr, Buffer->note_begin(),
>> - Buffer->note_end(), "note"));
>> + const DiagnosticLevelMask DiagMask =
>> + ~Diags.getDiagnosticOptions().getVerifyIgnoreUnexpected();
>> + if (bool(DiagnosticLevelMask::Error & DiagMask))
>> + NumErrors += PrintUnexpected(Diags, nullptr, Buffer->err_begin(),
>> + Buffer->err_end(), "error");
>> + if (bool(DiagnosticLevelMask::Warning & DiagMask))
>> + NumErrors += PrintUnexpected(Diags, nullptr, Buffer->warn_begin(),
>> + Buffer->warn_end(), "warn");
>> + if (bool(DiagnosticLevelMask::Remark & DiagMask))
>> + NumErrors += PrintUnexpected(Diags, nullptr,
>> Buffer->remark_begin(),
>> + Buffer->remark_end(), "remark");
>> + if (bool(DiagnosticLevelMask::Note & DiagMask))
>> + NumErrors += PrintUnexpected(Diags, nullptr, Buffer->note_begin(),
>> + Buffer->note_end(), "note");
>> }
>>
>> Diags.setClient(CurClient, Owner.release() != nullptr);
>>
>> Added: cfe/trunk/test/Frontend/verify-ignore-unexpected.c
>> URL:
>> http://llvm.org/viewvc/llvm-project/cfe/trunk/test/Frontend/verify-ignore-unexpected.c?rev=239665&view=auto
>>
>> ==============================================================================
>> --- cfe/trunk/test/Frontend/verify-ignore-unexpected.c (added)
>> +++ cfe/trunk/test/Frontend/verify-ignore-unexpected.c Sat Jun 13 02:11:40
>> 2015
>> @@ -0,0 +1,81 @@
>> +// RUN: not %clang_cc1 -DTEST_SWITCH
>> -verify-ignore-unexpected=remark,aoeu,note -verify %s 2>&1 \
>> +// RUN: | FileCheck -check-prefix=CHECK-BAD-SWITCH %s
>> +#ifdef TEST_SWITCH
>> +// expected-no-diagnostics
>> +#endif
>> +// CHECK-BAD-SWITCH: error: 'error' diagnostics seen but not expected:
>> +// CHECK-BAD-SWITCH-NEXT: (frontend): invalid value 'aoeu' in
>> '-verify-ignore-unexpected='
>> +
>> +// RUN: %clang_cc1 -DTEST1 -verify %s
>> +// RUN: %clang_cc1 -DTEST1 -verify -verify-ignore-unexpected %s
>> +#ifdef TEST1
>> +#warning MyWarning1
>> + // expected-warning at -1 {{MyWarning1}}
>> +int x; // expected-note {{previous definition is here}}
>> +float x; // expected-error {{redefinition of 'x'}}
>> +#endif
>> +
>> +// RUN: not %clang_cc1 -DTEST2 -verify %s 2>&1 \
>> +// RUN: | FileCheck -check-prefix=CHECK-UNEXP %s
>> +// RUN: not %clang_cc1 -DTEST2 -verify -verify-ignore-unexpected= %s 2>&1
>> \
>> +// RUN: | FileCheck -check-prefix=CHECK-UNEXP %s
>> +// RUN: not %clang_cc1 -DTEST2 -verify -verify-ignore-unexpected=note %s
>> 2>&1 \
>> +// RUN: | FileCheck -check-prefix=CHECK-NOTE %s
>> +// RUN: not %clang_cc1 -DTEST2 -verify -verify-ignore-unexpected=warning
>> %s 2>&1 \
>> +// RUN: | FileCheck -check-prefix=CHECK-WARN %s
>> +// RUN: not %clang_cc1 -DTEST2 -verify -verify-ignore-unexpected=error %s
>> 2>&1 \
>> +// RUN: | FileCheck -check-prefix=CHECK-ERR %s
>> +#ifdef TEST2
>> +#warning MyWarning2
>> +int x;
>> +float x;
>> +#endif
>> +// CHECK-UNEXP: no expected directives found
>> +// CHECK-UNEXP-NEXT: 'error' diagnostics seen but not expected
>> +// CHECK-UNEXP-NEXT: Line {{[0-9]+}}: redefinition of 'x'
>> +// CHECK-UNEXP-NEXT: 'warning' diagnostics seen but not expected
>> +// CHECK-UNEXP-NEXT: Line {{[0-9]+}}: MyWarning2
>> +// CHECK-UNEXP-NEXT: 'note' diagnostics seen but not expected
>> +// CHECK-UNEXP-NEXT: Line {{[0-9]+}}: previous definition is here
>> +// CHECK-UNEXP-NEXT: 4 errors generated.
>> +
>> +// CHECK-NOTE: no expected directives found
>> +// CHECK-NOTE-NEXT: 'error' diagnostics seen but not expected
>> +// CHECK-NOTE-NEXT: Line {{[0-9]+}}: redefinition of 'x'
>> +// CHECK-NOTE-NEXT: 'warning' diagnostics seen but not expected
>> +// CHECK-NOTE-NEXT: Line {{[0-9]+}}: MyWarning2
>> +// CHECK-NOTE-NEXT: 3 errors generated.
>> +
>> +// CHECK-WARN: no expected directives found
>> +// CHECK-WARN-NEXT: 'error' diagnostics seen but not expected
>> +// CHECK-WARN-NEXT: Line {{[0-9]+}}: redefinition of 'x'
>> +// CHECK-WARN-NEXT: 'note' diagnostics seen but not expected
>> +// CHECK-WARN-NEXT: Line {{[0-9]+}}: previous definition is here
>> +// CHECK-WARN-NEXT: 3 errors generated.
>> +
>> +// CHECK-ERR: no expected directives found
>> +// CHECK-ERR-NEXT: 'warning' diagnostics seen but not expected
>> +// CHECK-ERR-NEXT: Line {{[0-9]+}}: MyWarning2
>> +// CHECK-ERR-NEXT: 'note' diagnostics seen but not expected
>> +// CHECK-ERR-NEXT: Line {{[0-9]+}}: previous definition is here
>> +// CHECK-ERR-NEXT: 3 errors generated.
>> +
>> +// RUN: not %clang_cc1 -DTEST3 -verify -verify-ignore-unexpected %s 2>&1
>> \
>> +// RUN: | FileCheck -check-prefix=CHECK-EXP %s
>> +#ifdef TEST3
>> +// expected-error {{test3}}
>> +#endif
>> +// CHECK-EXP: 'error' diagnostics expected but not seen
>> +// CHECK-EXP-NEXT: Line {{[0-9]+}}: test3
>> +
>> +// RUN: not %clang_cc1 -DTEST4 -verify -verify-ignore-unexpected %s 2>&1
>> \
>> +// RUN: | FileCheck -check-prefix=CHECK-NOEXP %s
>> +// RUN: not %clang_cc1 -DTEST4 -verify
>> -verify-ignore-unexpected=warning,error,note %s 2>&1 \
>> +// RUN: | FileCheck -check-prefix=CHECK-NOEXP %s
>> +#ifdef TEST4
>> +#warning MyWarning4
>> +int x;
>> +float x;
>> +#endif
>> +// CHECK-NOEXP: error: no expected directives found
>> +// CHECK-NOEXP-NEXT: 1 error generated
>>
>>
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