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Author SHA1 Message Date
Nikolai Kosjar 60e1296a9a [clang-tidy] Make the plugin honor NOLINT 
Instantiate a ClangTidyDiagnosticConsumer also for the plugin case and
let it forward the diagnostics to the external diagnostic engine that is
already in place.

One minor difference to the clang-tidy executable case is that the
compiler checks/diagnostics are referred to with their original name.
For example, for -Wunused-variable the plugin will refer to the check as
"-Wunused-variable" while the clang-tidy executable will refer to that
as "clang-diagnostic- unused-variable". This is because the compiler
diagnostics never reach ClangTidyDiagnosticConsumer.

Differential Revision: https://reviews.llvm.org/D61487

llvm-svn: 362702
 2019-06-06 13:13:27 +00:00
Fangrui Song c2aded5017 [clangd] Respect clang-tidy suppression comments 
This partially fixes https://bugs.llvm.org/show_bug.cgi?id=41218.

Reviewed By: sammccall

Patch by Nathan Ridge!

Differential Revision: https://reviews.llvm.org/D60953

llvm-svn: 361112
 2019-05-19 04:06:52 +00:00
Haojian Wu f2879d8a48 [clang-tidy] Add fix descriptions to clang-tidy checks. 
Summary:
Motivation/Context: in the code review system integrating with clang-tidy,
clang-tidy doesn't provide a human-readable description of the fix. Usually
developers have to preview a code diff (before vs after apply the fix) to
understand what the fix does before applying a fix.

This patch proposes that each clang-tidy check provides a short and
actional fix description that can be shown in the UI, so that users can know
what the fix does without previewing diff.

This patch extends clang-tidy framework to support fix descriptions (will add implementations for
existing checks in the future). Fix descriptions and fixes are emitted via diagnostic::Note (rather than
attaching the main warning diagnostic).

Before this patch:

```
void MyCheck::check(...) {
   ...
   diag(loc, "my check warning") <<  FixtItHint::CreateReplacement(...);
}
```

After:

```
void MyCheck::check(...) {
   ...
   diag(loc, "my check warning"); // Emit a check warning
   diag(loc, "fix description", DiagnosticIDs::Note) << FixtItHint::CreateReplacement(...); // Emit a diagnostic note and a fix
}
```

Reviewers: sammccall, alexfh

Reviewed By: alexfh

Subscribers: MyDeveloperDay, Eugene.Zelenko, aaron.ballman, JonasToth, xazax.hun, jdoerfert, cfe-commits

Tags: #clang-tools-extra, #clang

Differential Revision: https://reviews.llvm.org/D59932

llvm-svn: 358576
 2019-04-17 12:53:59 +00:00
Haojian Wu 42810363de [clang-tidy] NOLINT support for "clang-diagnostic-*". 
Reviewers: alexfh, aaron.ballman

Reviewed By: alexfh

Subscribers: xazax.hun, cfe-commits

Tags: #clang

Differential Revision: https://reviews.llvm.org/D59255

llvm-svn: 355934
 2019-03-12 16:11:46 +00:00
Chandler Carruth 2946cd7010 Update the file headers across all of the LLVM projects in the monorepo 
to reflect the new license.

We understand that people may be surprised that we're moving the header
entirely to discuss the new license. We checked this carefully with the
Foundation's lawyer and we believe this is the correct approach.

Essentially, all code in the project is now made available by the LLVM
project under our new license, so you will see that the license headers
include that license only. Some of our contributors have contributed
code under our old license, and accordingly, we have retained a copy of
our old license notice in the top-level files in each project and
repository.

llvm-svn: 351636
 2019-01-19 08:50:56 +00:00
Haojian Wu 530108cb5c [clang-tidy] use "const SourceManager&" parameter, NFC. 
llvm-svn: 349623
 2018-12-19 13:25:08 +00:00
Sam McCall 3c1f4903b7 [clang-tidy] Untangle layering in ClangTidyDiagnosticConsumer somewhat. NFC 
Summary:
Clang's hierarchy is CompilerInstance -> DiagnosticsEngine -> DiagnosticConsumer.
(Ownership is optional/shared, but this structure is fairly clear).

Currently ClangTidyDiagnosticConsumer *owns* the DiagnosticsEngine:
 - this inverts the hierarchy, which is confusing
 - this means ClangTidyDiagnosticConsumer() mutates the passed-in context, which
   is both surprising and limits flexibility
 - it's not possible to use a different DiagnosticsEngine with ClangTidy

This means a little bit more code in the places ClangTidy is used standalone,
but more flexibility in using ClangTidy with other diagnostics configurations.

Reviewers: hokein

Subscribers: xazax.hun, cfe-commits

Differential Revision: https://reviews.llvm.org/D54033

llvm-svn: 346418
 2018-11-08 17:42:16 +00:00
Sam McCall cb50e23ba8 [clang-tidy] Get ClangTidyContext out of the business of storing diagnostics. NFC 
Summary:
Currently ClangTidyContext::diag() sends the diagnostics to a
DiagnosticsEngine, which probably delegates to a ClangTidyDiagnosticsConsumer,
which is supposed to go back and populate ClangTidyContext::Errors.

After this patch, the diagnostics are stored in the ClangTidyDiagnosticsConsumer
itself and can be retrieved from there.

Why?
 - the round-trip from context -> engine -> consumer -> context is confusing
   and makes it harder to establish layering between these things.
 - context does too many things, and makes it hard to use clang-tidy as a library
 - everyone who actually wants the diagnostics has access to the ClangTidyDiagnosticsConsumer

The most natural implementation (ClangTidyDiagnosticsConsumer::take()
finalizes diagnostics) causes a test failure: clang-tidy-run-with-database.cpp
asserts that clang-tidy exits successfully when trying to process a file
that doesn't exist.
In clang-tidy today, this happens because finish() is never called, so the
diagnostic is never flushed. This looks like a bug to me.
For now, this patch carefully preserves that behavior, but I'll ping the
authors to see whether it's deliberate and worth preserving.

Reviewers: hokein

Subscribers: xazax.hun, cfe-commits, alexfh

Differential Revision: https://reviews.llvm.org/D53953

llvm-svn: 345961
 2018-11-02 10:01:59 +00:00
Sam McCall dd2120c08f [clang-tidy] Remove false decoupling in ClangTidyContext. NFC 
These getters/setters don't encapsulate any behavior, and can only be
called by friends.

llvm-svn: 345716
 2018-10-31 13:08:19 +00:00
Roman Lebedev a87f1d04ce [clang-tidy] Store checks profiling info as JSON files 
Summary:
Continuation of D46504.

Example output:
```
  $ clang-tidy -enable-check-profile -store-check-profile=. -checks=-*,readability-function-size source.cpp
  $ # Note that there won't be timings table printed to the console.
  $ cat *.json
  {
  "file": "/path/to/source.cpp",
  "timestamp": "2018-05-16 16:13:18.717446360",
  "profile": {
    "time.clang-tidy.readability-function-size.wall": 1.0421266555786133e+00,
    "time.clang-tidy.readability-function-size.user": 9.2088400000005421e-01,
    "time.clang-tidy.readability-function-size.sys": 1.2418899999999974e-01
  }
  }
```

There are two arguments that control profile storage:

* `-store-check-profile=<prefix>`

  By default reports are printed in tabulated format to stderr. When this option
  is passed, these per-TU profiles are instead stored as JSON.
  If the prefix is not an absolute path, it is considered to be relative to the
  directory from where you have run :program:`clang-tidy`. All `.` and `..`
  patterns in the path are collapsed, and symlinks are resolved.

  Example:
  Let's suppose you have a source file named `example.cpp`, located in
  `/source` directory.

  * If you specify `-store-check-profile=/tmp`, then the profile will be saved
    to `/tmp/<timestamp>-example.cpp.json`

  * If you run :program:`clang-tidy` from within `/foo` directory, and specify
    `-store-check-profile=.`, then the profile will still be saved to
    `/foo/<timestamp>-example.cpp.json`

Reviewers: alexfh, sbenza, george.karpenkov, NoQ, aaron.ballman

Reviewed By: alexfh, george.karpenkov, aaron.ballman

Subscribers: Quuxplusone, JonasToth, aaron.ballman, llvm-commits, rja, Eugene.Zelenko, xazax.hun, mgrang, cfe-commits

Tags: #clang-tools-extra

Differential Revision: https://reviews.llvm.org/D46602

llvm-svn: 334101
 2018-06-06 15:07:51 +00:00
Alexander Kornienko 85a92c3f0b [clang-tidy] Add a flag to enable alpha checkers 
Summary: The alpha checkers can already be enabled using the clang driver, this allows them to be enabled using the clang-tidy as well. This can make it easier to test the alpha checkers with projects which already support the compile_commands.json. It will also allow more people to give feedback and patches about the alpha checkers since they can run it as part of clang tidy checks.

Reviewers: aaron.ballman, hokein, ilya-biryukov, alexfh, lebedev.ri, xbolva00

Reviewed By: aaron.ballman, alexfh, lebedev.ri, xbolva00

Subscribers: xbolva00, NoQ, dcoughlin, lebedev.ri, xazax.hun, cfe-commits

Patch by Paul Fultz II!

Differential Revision: https://reviews.llvm.org/D46159

llvm-svn: 332609
 2018-05-17 14:04:27 +00:00
Roman Lebedev 1215251151 [clang-tidy] Profile is a per-AST (per-TU) data. 
Summary:
As discussed in D45931, currently, profiling output of clang-tidy is somewhat not great.
It outputs one profile at the end of the execution, and that profile contains the data
from the last TU that was processed. So if the tool run on multiple TU's, the data is
not accumulated, it is simply discarded.

It would be nice to improve this.

This differential is the first step - make this profiling info per-TU,
and output it after the tool has finished processing each TU.
In particular, when `ClangTidyASTConsumer` destructor runs.

Next step will be to add a CSV (JSON?) printer to store said profiles under user-specified directory prefix.

Reviewers: alexfh, sbenza

Reviewed By: alexfh

Subscribers: Eugene.Zelenko, mgorny, xazax.hun, mgrang, klimek, cfe-commits

Tags: #clang-tools-extra

Differential Revision: https://reviews.llvm.org/D46504

llvm-svn: 331763
 2018-05-08 13:14:21 +00:00
Richard Smith 4bb15ab853 Fix up after clang r331155. 
llvm-svn: 331156
 2018-04-30 05:26:07 +00:00
Aaron Ballman 3d161ab6f4 Add support for NOLINT and NOLINTNEXTLINE comments mentioning specific check names. 
Supports a comma-separated list of check names to be disabled on the given line. Also supports * as a wildcard to disable all lint diagnostic messages on that line.

Patch by Anton (xgsa).

llvm-svn: 320713
 2017-12-14 16:13:57 +00:00
Alexander Kornienko 9b8df6ae02 [clang-tidy] Ignore newlines in checks list 
This is a follow up to https://reviews.llvm.org/D30567 where I overlooked that
LLVM YAML parser doesn't support multiline literal folding.

llvm-svn: 310491
 2017-08-09 16:00:31 +00:00
Peter Smith d34a65d6b6 [NFC] Update to account for DiagnosticRenderer use of FullSourceLoc 
D31709 [NFC] Refactor DiagnosticRenderer to use FullSourceLoc was committed
in r305684 and reverted in 305688 as clang-tidy and clang-query failed to
build. This change updates the extra tools to use the new interface.

Reviewers: christof, rnk, rsmith, rovka, alexfh

Reviewed By: alexfh

Differential Revision: https://reviews.llvm.org/D34513

llvm-svn: 306385
 2017-06-27 10:04:04 +00:00
Simon Pilgrim 8d81c22164 Fix 'not all control paths return a value' warning on windows buildbots. 
llvm-svn: 303344
 2017-05-18 10:48:23 +00:00
Alexander Kornienko 6180337fe1 [clang-tidy] Optimize GlobList::contains 
With large lists of checks and large number of warnings GlobList::contains
starts being ridiculously CPU hungry, since it runs regexp match per glob.
Caching results of glob matching in a StringMap significantly speeds up check
filtering even for small GlobLists.

/tmp/q.cc:

void f() {
  int I;
  {int I;}
  {int I;}
  {int I;}
  ... // 200k times
}

Before the patch:

GlobList with 2 entries:
  $ time clang-tidy-old -checks=-*,modernize-use-override /tmp/q.cc -- -Wshadow
  200000 warnings generated.
  Suppressed 200000 warnings (200000 with check filters).

  real    0m3.826s
  user    0m3.176s
  sys     0m0.504s

GlobList with 28 entries:
  $ time clang-tidy-old -checks=-*,a,b,c,d,e,f,g,h,i,j,k,l,m,n,o,p,q,r,s,t,u,v,w,x,y,z,modernize-use-override /tmp/q.cc -- -Wshadow
  200000 warnings generated.
  Suppressed 200000 warnings (200000 with check filters).

  real    0m5.000s
  user    0m4.744s
  sys     0m0.060s

GlobList with 158 entries:
  $ time clang-tidy-old -checks=-*,a,b,c,d,e,f,g,h,i,j,k,l,m,n,o,p,q,r,s,t,u,v,w,x,y,z,a,b,c,d,e,f,g,h,i,j,k,l,m,n,o,p,q,r,s,t,u,v,w,x,y,z,a,b,c,d,e,f,g,h,i,j,k,l,m,n,o,p,q,r,s,t,u,v,w,x,y,z,a,b,c,d,e,f,g,h,i,j,k,l,m,n,o,p,q,r,s,t,u,v,w,x,y,z,a,b,c,d,e,f,g,h,i,j,k,l,m,n,o,p,q,r,s,t,u,v,w,x,y,z,a,b,c,d,e,f,g,h,i,j,k,l,m,n,o,p,q,r,s,t,u,v,w,x,y,z,modernize-use-override /tmp/q.cc -- -Wshadow
  200000 warnings generated.
  Suppressed 200000 warnings (200000 with check filters).

  real    0m13.920s
  user    0m13.636s
  sys     0m0.104s

With the patch runtime is practically independent from the length of the GlobList:
  $ time clang-tidy-new -checks=-*,a,b,c,d,e,f,g,h,i,j,k,l,m,n,o,p,q,r,s,t,u,v,w,x,y,z,a,b,c,d,e,f,g,h,i,j,k,l,m,n,o,p,q,r,s,t,u,v,w,x,y,z,a,b,c,d,e,f,g,h,i,j,k,l,m,n,o,p,q,r,s,t,u,v,w,x,y,z,a,b,c,d,e,f,g,h,i,j,k,l,m,n,o,p,q,r,s,t,u,v,w,x,y,z,a,b,c,d,e,f,g,h,i,j,k,l,m,n,o,p,q,r,s,t,u,v,w,x,y,z,a,b,c,d,e,f,g,h,i,j,k,l,m,n,o,p,q,r,s,t,u,v,w,x,y,z,modernize-use-override /tmp/q.cc -- -Wshadow
  200000 warnings generated.
  Suppressed 200000 warnings (200000 with check filters).

  real    0m2.300s
  user    0m2.104s
  sys     0m0.044s

llvm-svn: 303321
 2017-05-18 01:13:51 +00:00
Alexander Kornienko 21375185e7 Change getChecksFilter() interface to hide implementation details. 
llvm-svn: 303264
 2017-05-17 14:39:47 +00:00
Alexander Kornienko 9660d4d328 [clang-tidy] Allow disabling compatibility check for generated fixes. 
llvm-svn: 302536
 2017-05-09 15:10:26 +00:00
Alexander Kornienko d0488d427c Change EOL style to LF. NFC 
llvm-svn: 302534
 2017-05-09 14:56:28 +00:00
Marek Kurdej 92ecb51fae [clang-tidy] Fix treating non-space whitespaces in checks list. 
Summary:
This furtherly improves r295303: [clang-tidy] Ignore spaces between globs in the Checks option.
Trims all whitespaces and not only spaces and correctly computes the offset of the checks list (taking the size before trimming).

Reviewers: alexfh

Reviewed By: alexfh

Subscribers: cfe-commits, JDevlieghere

Differential Revision: https://reviews.llvm.org/D30567

llvm-svn: 298621
 2017-03-23 16:32:06 +00:00
Alexander Kornienko 762adef1a9 [clang-tidy] Ignore spaces between globs in the Checks option. 
llvm-svn: 295303
 2017-02-16 10:23:18 +00:00
Benjamin Kramer d1013b44e3 [clang-tidy] Add support for NOLINTNEXTLINE. 
Reviewers: alexfh

Subscribers: JDevlieghere, cfe-commits

Differential Revision: https://reviews.llvm.org/D29899

llvm-svn: 295049
 2017-02-14 12:47:56 +00:00
Benjamin Kramer 19f2403d3b [clang-tidy] Reduce indentation. NFC. 
llvm-svn: 294974
 2017-02-13 18:03:10 +00:00
Alexander Kornienko 563de799e3 [clang-tidy] Add check name to YAML export (clang-tools-extra part) 
Add a field indicating the associated check for every replacement to the YAML
report generated with the '-export-fixes' option.  Update
clang-apply-replacements to handle the new format.

Patch by Alpha Abdoulaye!

Differential revision: https://reviews.llvm.org/D26137

llvm-svn: 290893
 2017-01-03 14:36:13 +00:00
Mandeep Singh Grang 7c7ea7d0ae [clang-tools-extra] Format sources with clang-format. NFC. 
Summary:
Ran clang-format on all .c/.cpp/.h files in clang-tools-extra.
Excluded the test, unittests, clang-reorder-fields, include-fixer, modularize and pptrace directories.

Reviewers: klimek, alexfh

Subscribers: nemanjai

Tags: #clang-tools-extra

Differential Revision: https://reviews.llvm.org/D26329

llvm-svn: 286221
 2016-11-08 07:50:19 +00:00
Malcolm Parsons cb2e749e46 [clang-tidy] Suppress notes for warnings that were ignored 
Fixes PR30565.

Patch by Nikita Kakuev

llvm-svn: 285861
 2016-11-02 21:14:22 +00:00
Alexander Kornienko 98d3391a59 [clang-tidy] Clean up code after applying replacements. 
Summary:
Remove empty namespaces and initializer list commas / colons in
affected ranges. Initial patch: proper options for enabling the cleanup and
specifying the format style are needed.

Reviewers: hokein, ioeric

Subscribers: beanz, mgorny, cfe-commits

Differential Revision: https://reviews.llvm.org/D24572

llvm-svn: 284399
 2016-10-17 17:25:02 +00:00
Matthias Gehre 41a83a7d2b [clang-tidy] fix for NOLINT after macro expansion 
Summary:
When having
``` c++
    #define MACRO code-with-warning
    MACRO; // NOLINT
```
clang-tidy would still show the warning, because
it searched for "NOLINT" only in the first line,
not on the second.
This caused e.g. https://llvm.org/bugs/show_bug.cgi?id=29089
(where the macro was defined in a system header). See also
the added test cases.
Now clang-tidy looks at the line of macro invocation and every line
of macro definition for a NOLINT comment.

Reviewers: alexfh, aaron.ballman, hokein

Subscribers: cfe-commits

Differential Revision: https://reviews.llvm.org/D24845

llvm-svn: 282330
 2016-09-24 16:06:53 +00:00
Eric Liu 7e5445267f Fix clang-tidy crash when a single fix is applied on multiple files. 
Summary:
tooling::Replacements only holds replacements for a single file, so
this patch makes Fix a map from file paths to tooling::Replacements so that it
can be applied on multiple files.

Reviewers: hokein, alexfh

Subscribers: Prazek, cfe-commits

Differential Revision: https://reviews.llvm.org/D23257

llvm-svn: 278101
 2016-08-09 07:54:49 +00:00
Eric Liu 267034ca9c Changes related to new implementation of tooling::Replacements as class. 
Summary: See http://reviews.llvm.org/D21748 for details.

Reviewers: djasper, klimek

Subscribers: cfe-commits

Differential Revision: https://reviews.llvm.org/D21749

llvm-svn: 277336
 2016-08-01 10:16:39 +00:00
Justin Lebar 41e9dad437 [Typo police] s/proccess/process/, s/auxiliary/auxilliary/. 
llvm-svn: 277113
 2016-07-29 05:26:58 +00:00
Benjamin Kramer 7035cbf8eb [clang-tidy] Avoid duplicated DenseMap lookup. 
The std::string is still constructed on demand. No functionality change
intended.

llvm-svn: 276282
 2016-07-21 14:13:45 +00:00
Alexander Kornienko 5d08bb72d9 [clang-tidy] Switch to a more common way of customizing check behavior. 
This should have been done this way from the start, however I somehow missed
r257177.

llvm-svn: 270215
 2016-05-20 13:42:40 +00:00
Alexander Kornienko dbefbdb6d1 [clang-tidy] Apply NOLINT filtering to Clang warnings. 
llvm-svn: 268555
 2016-05-04 21:18:31 +00:00
Haojian Wu f7692a2792 [clang-tidy] Fix a crash issue when clang-tidy runs with compilation database. 
Summary:
The clang-tidy will trigger an assertion if it's not in the building directory.

TEST:
cd <llvm-repo>/
./build/bin/clang-tidy --checks=-*,modernize-use-nullptr -p build tools/clang/tools/extra/clang-tidy/ClangTidy.cpp

The crash issue is gone after applying this patch.

Fixes PR24834, PR26241

Reviewers: bkramer, alexfh

Subscribers: rizsotto.mailinglist, cfe-commits

Differential Revision: http://reviews.llvm.org/D17335

llvm-svn: 261991
 2016-02-26 09:19:33 +00:00
Alexander Kornienko 1612fa07d3 Add a new check, readability-redundant-string-init, that checks unnecessary string initializations. 
Reviewers: hokein, alexfh

Subscribers: cfe-commits

Patch by Shuai Wang!

Differential Revision: http://reviews.llvm.org/D17586

llvm-svn: 261939
 2016-02-25 23:57:23 +00:00
Alexander Kornienko 33c2494b69 [clang-tidy] Fix a copy-paste error. 
llvm-svn: 257900
 2016-01-15 16:16:47 +00:00
Jonathan Roelofs d60388a985 Teach clang-tidy how to upgrade warnings into errors. 
Similar in format to the `-checks=` argument, this new `-warnings-as-errors=`
argument upgrades any warnings emitted by the former to errors.

http://reviews.llvm.org/D15528

llvm-svn: 257642
 2016-01-13 17:36:41 +00:00
Aaron Ballman c00ad6c5fb Disable part of the misc-move-constructor-init checker when the check is enabled through cert-oop11-cpp. The CERT guideline does not cover moveable parameters as part of the OOP11-CPP recommendation, just copy construction from move constructors. 
llvm-svn: 257177
 2016-01-08 15:50:51 +00:00
Alexander Kornienko 58fe57a92b [clang-tidy] Test commit (playing with git-svn) 
llvm-svn: 253203
 2015-11-16 13:06:15 +00:00
Alexander Kornienko 64956b5e9a Add ExtraArgs and ExtraArgsBefore options to enable clang warnings via configuration files. 
Summary: This patch depends on http://reviews.llvm.org/D14191

Reviewers: djasper, klimek

Subscribers: cfe-commits

Differential Revision: http://reviews.llvm.org/D14192

llvm-svn: 252485
 2015-11-09 16:28:11 +00:00
Angel Garcia Gomez 2918904673 Replacements in different files do not overlap. 
Summary: Prevent clang-tidy from discarding fixes that are in different files but happen to have the same file offset.

Reviewers: klimek, bkramer

Subscribers: bkramer, alexfh, cfe-commits

Differential Revision: http://reviews.llvm.org/D13810

llvm-svn: 250523
 2015-10-16 16:15:27 +00:00
Benjamin Kramer 1487a3de40 Empty undefined static variable -> local variable. 
Resolves a -Wundefined-internal warning from clang.

llvm-svn: 250510
 2015-10-16 12:11:15 +00:00
Angel Garcia Gomez 166935764b Fix overlapping replacements in clang-tidy. 
Summary: Prevent clang-tidy from applying fixes to errors that overlap with other errors' fixes, with one exception: if one fix is completely contained inside another one, then we can apply the big one.

Reviewers: bkramer, klimek

Subscribers: djasper, cfe-commits, alexfh

Differential Revision: http://reviews.llvm.org/D13516

llvm-svn: 250509
 2015-10-16 11:43:49 +00:00
Alexander Kornienko c7a6b40d10 [clang-tidy] Ignore spaces in -checks= 
llvm-svn: 247812
 2015-09-16 16:16:53 +00:00
Marek Kurdej 099227a270 Test commit. 
llvm-svn: 247536
 2015-09-14 08:05:12 +00:00
Aaron Ballman f36a425eba Reapplying r246209, which exposed language options to the checkers. This time disable UseNullptrCheck when not compiling in C++ mode, but still allow in C++11 mode since it's likely the user wishes to modernize their code. 
llvm-svn: 246298
 2015-08-28 13:20:46 +00:00
Aaron Ballman 46c9ae3578 Reverting r246209 while I investigate a build bot failure: http://lab.llvm.org:8011/builders/clang-x86_64-debian-fast/builds/30516 
llvm-svn: 246224
 2015-08-27 22:19:50 +00:00