platform/upstream/llvm.git
5 years ago[ADCE] Fix non-deterministic behaviour due to iterating over a pointer set.
Amara Emerson [Tue, 16 Jul 2019 15:23:10 +0000 (15:23 +0000)]
[ADCE] Fix non-deterministic behaviour due to iterating over a pointer set.

Original patch by Yann Laigle-Chapuy

Differential Revision: https://reviews.llvm.org/D64785

llvm-svn: 366215

5 years ago[DAGCombiner] fold (addcarry (xor a, -1), b, c) -> (subcarry b, a, !c) and flip carry.
Amaury Sechet [Tue, 16 Jul 2019 15:17:00 +0000 (15:17 +0000)]
[DAGCombiner] fold (addcarry (xor a, -1), b, c) -> (subcarry b, a, !c) and flip carry.

Summary:
As per title. DAGCombiner only mathes the special case where b = 0, this patches extends the pattern to match any value of b.

Depends on D57302

Reviewers: hfinkel, RKSimon, craig.topper

Subscribers: llvm-commits

Tags: #llvm

Differential Revision: https://reviews.llvm.org/D59208

llvm-svn: 366214

5 years ago[SWIG] Deprecate SWIG 1.x
Jonas Devlieghere [Tue, 16 Jul 2019 15:14:01 +0000 (15:14 +0000)]
[SWIG] Deprecate SWIG 1.x

The last swig 1.x release dates from 2009, now 10 years ago. Recently, I
fixed an issue that prevented us from using swig 4 (r364974), which
turned out to be not backward compatible with swig 1.x (r365718).

This patch deprecates this (really old) version of swig and makes swig 2
the minimum supported version in LLDB . This should be fine for the
build bots, which are all running swig 3 or later.

Differential revision: https://reviews.llvm.org/D64782

llvm-svn: 366213

5 years ago[OpenCL] Fixing sampler initialisations for C++ mode.
Neil Hickey [Tue, 16 Jul 2019 14:57:32 +0000 (14:57 +0000)]
[OpenCL] Fixing sampler initialisations for C++ mode.

Allow conversions between integer and sampler type.

Differential Revision: https://reviews.llvm.org/D64791

llvm-svn: 366212

5 years ago[OPENMP]Add support for analysis of if clauses.
Alexey Bataev [Tue, 16 Jul 2019 14:51:46 +0000 (14:51 +0000)]
[OPENMP]Add support for analysis of if clauses.

Summary:
Added support for analysis of if clauses in the OpenMP directives to be
able to check for the use of uninitialized variables.

Reviewers: NoQ

Subscribers: guansong, jfb, jdoerfert, caomhin, kkwli0, cfe-commits

Tags: clang

Differential Revision: https://reviews.llvm.org/D64646

llvm-svn: 366211

5 years agoAMDGPU/GlobalISel: Fix test failures in release build
Matt Arsenault [Tue, 16 Jul 2019 14:28:30 +0000 (14:28 +0000)]
AMDGPU/GlobalISel: Fix test failures in release build

Apparently the check for legal instructions during instruction
select does not happen without an asserts build, so these would
successfully select in release, and fail in debug.

Make s16 and/or/xor legal. These can just be selected directly
to the 32-bit operation, as is already done in SelectionDAG, so just
make them legal.

llvm-svn: 366210

5 years ago[llvm-ar][test] Add to llvm-ar test coverage
Owen Reynolds [Tue, 16 Jul 2019 14:25:37 +0000 (14:25 +0000)]
[llvm-ar][test] Add to llvm-ar test coverage

This change adds tests to cover existing llvm-ar functionality.
print.test is omitted due to failing on Darwin.

Differential Revision: https://reviews.llvm.org/D64330

llvm-svn: 366209

5 years ago[pstl] Fix compilation with TBB backend
Louis Dionne [Tue, 16 Jul 2019 13:45:10 +0000 (13:45 +0000)]
[pstl] Fix compilation with TBB backend

Some types were not using the right namespace qualification.

llvm-svn: 366208

5 years ago[clangd] Added highlighting for the targets in typedefs and using.
Johan Vikstrom [Tue, 16 Jul 2019 13:23:12 +0000 (13:23 +0000)]
[clangd] Added highlighting for the targets in typedefs and using.

Summary:
In `typedef int A` the `A` was not highlighted previously.

This patch gives `A` the same kind of highlighting that the underlying type has (class/enum) (which in this example is no special highlighting because builtins are not handled yet)
Will add highlightings for built ins in another patch.

Reviewers: hokein, sammccall, ilya-biryukov

Subscribers: MaskRay, jkorous, arphaman, kadircet, cfe-commits

Tags: #clang

Differential Revision: https://reviews.llvm.org/D64754

llvm-svn: 366207

5 years agoReapply [llvm-ar][test] Increase llvm-ar test coverage
Owen Reynolds [Tue, 16 Jul 2019 12:53:59 +0000 (12:53 +0000)]
Reapply [llvm-ar][test] Increase llvm-ar test coverage

This reapplies 365316 without extract.test due to failing on Darwin.

Differential Revision: https://reviews.llvm.org/D63935

llvm-svn: 366206

5 years agoremove a duplicate declaration
Sylvestre Ledru [Tue, 16 Jul 2019 12:05:54 +0000 (12:05 +0000)]
remove a duplicate declaration

llvm-svn: 366205

5 years agoDocument the LLVM_ENABLE_BINDINGS option
Sylvestre Ledru [Tue, 16 Jul 2019 11:59:17 +0000 (11:59 +0000)]
Document the LLVM_ENABLE_BINDINGS option

llvm-svn: 366204

5 years ago[Object/llvm-readelf/llvm-readobj] - Improve error reporting when e_shstrndx is broken.
George Rimar [Tue, 16 Jul 2019 11:07:30 +0000 (11:07 +0000)]
[Object/llvm-readelf/llvm-readobj] - Improve error reporting when e_shstrndx is broken.

When e_shstrndx is broken, it is impossible to get a section name.
In this patch I improved the error message we show and
added tests for Object and for llvm-readelf/llvm-readobj

Message was changed in two places:
1) llvm-readelf/llvm-readobj previously used a code from Object/ELF.h,
now they have a modified version of it (it has less checks and allows
dumping broken things).
2) Code in Object/ELF.h is still used for generic cases.

Differential revision: https://reviews.llvm.org/D64714

llvm-svn: 366203

5 years ago[Driver] Don't pass --dynamic-linker to ld on Solaris
Rainer Orth [Tue, 16 Jul 2019 11:06:43 +0000 (11:06 +0000)]
[Driver] Don't pass --dynamic-linker to ld on Solaris

I noticed that clang currently passes --dynamic-linker to ld.  This has been the case
since Solaris 11 support was added initially back in 2012 by David Chisnall (r150580).
I couldn't find any patch submission, let alone a justification, for this, and it seems
completely useless: --dynamic-linker is a gld compatibility form of the option, the
native option being -I.  First of all, however, the dynamic linker passed is simply the
default, so there's no reason at all to specify it in the first place.

This patch removes passing the option and adjusts the affected testcase accordingly.

Tested on x86_64-pc-solaris2.11 and sparcv9-sun-solaris2.11.

Differential Revision: https://reviews.llvm.org/D64493

llvm-svn: 366202

5 years agoReapply [llvm-ar][test] Add to MRI test coverage
Owen Reynolds [Tue, 16 Jul 2019 11:02:11 +0000 (11:02 +0000)]
Reapply [llvm-ar][test] Add to MRI test coverage

This reapplies 363232 without mri-utf8.test due to failing on Darwin.

Differential Revision: https://reviews.llvm.org/D63197

llvm-svn: 366201

5 years ago[SemaTemplate] Fix uncorrected typos after pack expansion
Sam McCall [Tue, 16 Jul 2019 10:30:21 +0000 (10:30 +0000)]
[SemaTemplate] Fix uncorrected typos after pack expansion

Summary:
This case is particularly important for clangd, as it is triggered after
inserting the snippet for variadic functions.

Reviewers: kadircet, ilya-biryukov

Subscribers: llvm-commits

Tags: #llvm

Differential Revision: https://reviews.llvm.org/D64677

llvm-svn: 366200

5 years ago[clangd] Don't rebuild background index until we indexed one TU per thread.
Sam McCall [Tue, 16 Jul 2019 10:17:06 +0000 (10:17 +0000)]
[clangd] Don't rebuild background index until we indexed one TU per thread.

Summary:
This increases the odds that the boosted file (cpp file matching header)
will be ready. (It always enqueues first, so it'll be present unless
another thread indexes *two* files before the first thread indexes one.)

Reviewers: kadircet

Subscribers: ilya-biryukov, MaskRay, jkorous, arphaman, llvm-commits

Tags: #llvm

Differential Revision: https://reviews.llvm.org/D64682

llvm-svn: 366199

5 years agoRemove username from git-llvm script, erroneously added in 366197
Sam McCall [Tue, 16 Jul 2019 10:14:53 +0000 (10:14 +0000)]
Remove username from git-llvm script, erroneously added in 366197

llvm-svn: 366198

5 years ago[AArch64] Implement __jcvt intrinsic from Armv8.3-A
Kyrylo Tkachov [Tue, 16 Jul 2019 09:27:39 +0000 (09:27 +0000)]
[AArch64] Implement __jcvt intrinsic from Armv8.3-A

The jcvt intrinsic defined in ACLE [1] is available when ARM_FEATURE_JCVT is defined.

This change introduces the AArch64 intrinsic, wires it up to the instruction and a new clang builtin function.
The __ARM_FEATURE_JCVT macro is now defined when an Armv8.3-A or higher target is used.
I've implemented the target detection logic in Clang so that this feature is enabled for architectures from armv8.3-a onwards (so -march=armv8.4-a also enables this, for example).

make check-all didn't show any new failures.

[1] https://developer.arm.com/docs/101028/latest/data-processing-intrinsics

Differential Revision: https://reviews.llvm.org/D64495

llvm-svn: 366197

5 years ago[lldb] Rename Options.inc to CommandOptions.inc [NFC]
Raphael Isemann [Tue, 16 Jul 2019 09:27:02 +0000 (09:27 +0000)]
[lldb] Rename Options.inc to CommandOptions.inc [NFC]

It seems having two Options.inc files in the same project is giving our
custom Xcode project a hard time. This patch renames the new Options.inc
to CommandOptions.inc to prevent this conflict.

llvm-svn: 366196

5 years ago[NFC] Test commit: add full stop at end of comment
Kyrylo Tkachov [Tue, 16 Jul 2019 09:15:01 +0000 (09:15 +0000)]
[NFC] Test commit: add full stop at end of comment

llvm-svn: 366195

5 years ago[clang-scan-view] Force utf-8 when handling report (python2 only)
Serge Guelton [Tue, 16 Jul 2019 08:56:47 +0000 (08:56 +0000)]
[clang-scan-view] Force utf-8 when handling report (python2 only)

Original patch by random human <random.bored.human@gmail.com>

Differential Revision: https://reviews.llvm.org/D64129

llvm-svn: 366194

5 years ago[COFF] Rename variale references in comments after VariableName -> variableName change
Fangrui Song [Tue, 16 Jul 2019 08:26:38 +0000 (08:26 +0000)]
[COFF] Rename variale references in comments after VariableName -> variableName change

llvm-svn: 366193

5 years ago[WebAssembly] Rename variale references in comments after VariableName -> variableNam...
Fangrui Song [Tue, 16 Jul 2019 08:08:17 +0000 (08:08 +0000)]
[WebAssembly] Rename variale references in comments after VariableName -> variableName change

llvm-svn: 366192

5 years ago[NFC][PowerPC] Add test case for D64195
Zi Xuan Wu [Tue, 16 Jul 2019 07:54:47 +0000 (07:54 +0000)]
[NFC][PowerPC] Add test case for D64195

llvm-svn: 366191

5 years ago[DWARF] Fix the reserved values for unit length in DWARFDebugLine.
Igor Kudrin [Tue, 16 Jul 2019 07:01:08 +0000 (07:01 +0000)]
[DWARF] Fix the reserved values for unit length in DWARFDebugLine.

The DWARF3 documentation had inconsistency concerning the reserved range
for unit length values. The issue was fixed in DWARF4.

Differential Revision: https://reviews.llvm.org/D64622

llvm-svn: 366190

5 years ago[DWARF] Fix an incorrect format specifier.
Igor Kudrin [Tue, 16 Jul 2019 06:56:10 +0000 (06:56 +0000)]
[DWARF] Fix an incorrect format specifier.

This adjusts the format specifier because PCOffset is uint16_t.

Differential Revision: https://reviews.llvm.org/D64620

llvm-svn: 366189

5 years ago[DWARF] Simplify DWARFAttribute. NFC.
Igor Kudrin [Tue, 16 Jul 2019 06:53:06 +0000 (06:53 +0000)]
[DWARF] Simplify DWARFAttribute. NFC.

The first argument in the constructor was ignored, and the remaining
arguments were always passed as their defaults.

Differential Revision: https://reviews.llvm.org/D64407

llvm-svn: 366188

5 years ago[lldb] Handle EOF from `lldb-vscode`
Jan Kratochvil [Tue, 16 Jul 2019 06:34:44 +0000 (06:34 +0000)]
[lldb] Handle EOF from `lldb-vscode`

Sometimes (when running lldb-vscode under strace) I get:

read(0, "", 16)                         = 0
read(0, "", 16)                         = 0
read(0, "", 16)                         = 0
...

With this patch testcases finish properly even with strace:

read(0, "", 16)                         = 0
futex(0x1346508, FUTEX_WAKE_PRIVATE, 2147483647) = 0
stat("", 0x7ffe8f2634c8)                = -1 ENOENT (No such file or directory)
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_KILLED, si_pid=9124, si_uid=1001, si_status=SIGINT, si_utime=1, si_stime=0} ---
close(4)                                = 0
exit_group(0)                           = ?
+++ exited with 0 +++

Differential Revision: https://reviews.llvm.org/D64698

llvm-svn: 366187

5 years agoFinish "Adapt -fsanitize=function to SANITIZER_NON_UNIQUE_TYPEINFO"
Stephan Bergmann [Tue, 16 Jul 2019 06:23:27 +0000 (06:23 +0000)]
Finish "Adapt -fsanitize=function to SANITIZER_NON_UNIQUE_TYPEINFO"

i.e., recent 5745eccef54ddd3caca278d1d292a88b2281528b:

* Bump the function_type_mismatch handler version, as its signature has changed.

* The function_type_mismatch handler can return successfully now, so
  SanitizerKind::Function must be AlwaysRecoverable (like for
  SanitizerKind::Vptr).

* But the minimal runtime would still unconditionally treat a call to the
  function_type_mismatch handler as failure, so disallow -fsanitize=function in
  combination with -fsanitize-minimal-runtime (like it was already done for
  -fsanitize=vptr).

* Add tests.

Differential Revision: https://reviews.llvm.org/D61479

llvm-svn: 366186

5 years ago[NFC][test] Fix for riscv tests.
Puyan Lotfi [Tue, 16 Jul 2019 05:58:03 +0000 (05:58 +0000)]
[NFC][test] Fix for riscv tests.

Following tests need updating for: https://reviews.llvm.org/D55277

llvm-svn: 366183

5 years ago[X86] In combineStore, don't convert v2f32 load/store pairs to f64 loads/stores.
Craig Topper [Tue, 16 Jul 2019 05:52:27 +0000 (05:52 +0000)]
[X86] In combineStore, don't convert v2f32 load/store pairs to f64 loads/stores.

Type legalization can take care of this. This gives DAG combine
a little more time with the original types.

llvm-svn: 366182

5 years ago[ELF] Fix variable names in comments after VariableName -> variableName change
Fangrui Song [Tue, 16 Jul 2019 05:50:45 +0000 (05:50 +0000)]
[ELF] Fix variable names in comments after VariableName -> variableName change

Also fix some typos.

llvm-svn: 366181

5 years ago[RISCV] Match GNU tools canonical JALR and add aliases
Alex Bradbury [Tue, 16 Jul 2019 04:56:43 +0000 (04:56 +0000)]
[RISCV] Match GNU tools canonical JALR and add aliases

The canonical GNU form of JALR resembles a load/store instruction rather
than placing the immediate offset as a separate argument, so match this
behaviour. Also add parser-only aliases for the three-operand form, and
add other shorter aliases also emitted by GNU tools.

Differential Revision: https://reviews.llvm.org/D55277
Patch by James Clarke.

llvm-svn: 366179

5 years agoFix parameter name comments using clang-tidy. NFC.
Rui Ueyama [Tue, 16 Jul 2019 04:46:31 +0000 (04:46 +0000)]
Fix parameter name comments using clang-tidy. NFC.

This patch applies clang-tidy's bugprone-argument-comment tool
to LLVM, clang and lld source trees. Here is how I created this
patch:

$ git clone https://github.com/llvm/llvm-project.git
$ cd llvm-project
$ mkdir build
$ cd build
$ cmake -GNinja -DCMAKE_BUILD_TYPE=Debug \
    -DLLVM_ENABLE_PROJECTS='clang;lld;clang-tools-extra' \
    -DCMAKE_EXPORT_COMPILE_COMMANDS=On -DLLVM_ENABLE_LLD=On \
    -DCMAKE_C_COMPILER=clang -DCMAKE_CXX_COMPILER=clang++ ../llvm
$ ninja
$ parallel clang-tidy -checks='-*,bugprone-argument-comment' \
    -config='{CheckOptions: [{key: StrictMode, value: 1}]}' -fix \
    ::: ../llvm/lib/**/*.{cpp,h} ../clang/lib/**/*.{cpp,h} ../lld/**/*.{cpp,h}

llvm-svn: 366177

5 years ago[RISCV] Avoid overflow when determining number of nops for code align
Alex Bradbury [Tue, 16 Jul 2019 04:40:25 +0000 (04:40 +0000)]
[RISCV] Avoid overflow when determining number of nops for code align

RISCVAsmBackend::shouldInsertExtraNopBytesForCodeAlign() assumed that the
align specified would be greater than or equal to the minimum nop length, but
that is not always the case - for example if a user specifies ".align 0" in
assembly.

Differential Revision: https://reviews.llvm.org/D63274
Patch by Edward Jones.

llvm-svn: 366176

5 years ago[RISCV] Fix a potential issue in shouldInsertFixupForCodeAlign()
Alex Bradbury [Tue, 16 Jul 2019 04:37:19 +0000 (04:37 +0000)]
[RISCV] Fix a potential issue in shouldInsertFixupForCodeAlign()

The bool result of shouldInsertExtraNopBytesForCodeAlign() is not checked but
the returned nop count is unconditionally read even though it could be
uninitialized.

Differential Revision: https://reviews.llvm.org/D63285
Patch by Edward Jones.

llvm-svn: 366175

5 years ago[RISCV][NFC] Split PseudoCALL pattern out from instruction
Alex Bradbury [Tue, 16 Jul 2019 03:56:45 +0000 (03:56 +0000)]
[RISCV][NFC] Split PseudoCALL pattern out from instruction

Since PseudoCALL defines AsmString, it can be generated from assembly,
and so code-gen patterns should be defined separately to be consistent
with the style of the RISCV backend. Other pseudo-instructions exist
that have code-gen patterns defined directly, but these instructions are
purely for code-gen and cannot be written in assembly.

Differential Revision: https://reviews.llvm.org/D64012
Patch by James Clarke.

llvm-svn: 366174

5 years ago[RISCV][NFC] Fix HasStedExtA -> HasStdExtA typo in comment
Alex Bradbury [Tue, 16 Jul 2019 03:54:08 +0000 (03:54 +0000)]
[RISCV][NFC] Fix HasStedExtA -> HasStdExtA typo in comment

Differential Revision: https://reviews.llvm.org/D64011
Patch by James Clarke.

llvm-svn: 366173

5 years ago[RISCV] Make RISCVELFObjectWriter::getRelocType check IsPCRel
Alex Bradbury [Tue, 16 Jul 2019 03:47:34 +0000 (03:47 +0000)]
[RISCV] Make RISCVELFObjectWriter::getRelocType check IsPCRel

Previously, this function didn't check the IsPCRel argument. But doing so is a
useful check for errors, and also seemingly necessary for FK_Data_4 (which we
produce a R_RISCV_32_PCREL relocation for if IsPCRel).

Other than R_RISCV_32_PCREL, this should be NFC. Future exception handling
related patches will include tests that capture this behaviour.

llvm-svn: 366172

5 years agohwasan: Pad arrays with non-1 size correctly.
Peter Collingbourne [Tue, 16 Jul 2019 03:25:50 +0000 (03:25 +0000)]
hwasan: Pad arrays with non-1 size correctly.

Spotted by eugenis.

Differential Revision: https://reviews.llvm.org/D64783

llvm-svn: 366171

5 years agoAdd contains method to associative containers. This patch implements P0458R2, adding...
Zoe Carver [Tue, 16 Jul 2019 03:21:01 +0000 (03:21 +0000)]
Add contains method to associative containers. This patch implements P0458R2, adding contains to map, multimap, unordered_map, unordered_multimap, set, multiset, unordered_set, and unordered_multiset.

llvm-svn: 366170

5 years agoRevert "[OPENMP]Add support for analysis of if clauses."
Ali Tamur [Tue, 16 Jul 2019 03:20:15 +0000 (03:20 +0000)]
Revert "[OPENMP]Add support for analysis of if clauses."

This reverts commit rL366068.
The patch broke 86 tests under clang/test/OpenMP/ when run with address sanitizer.

llvm-svn: 366169

5 years agoAMDGPU: Avoid code predicates for extload PatFrags
Matt Arsenault [Tue, 16 Jul 2019 02:46:05 +0000 (02:46 +0000)]
AMDGPU: Avoid code predicates for extload PatFrags

Use the MemoryVT field. This will be necessary for tablegen to
automatically handle patterns for GlobalISel.

Doesn't handle the d16 lo/hi patterns. Those are a special case since
it involvess the custom node type.

llvm-svn: 366168

5 years agoChange a lit test to permit vendor specific clang version
Nathan Lanza [Tue, 16 Jul 2019 02:05:52 +0000 (02:05 +0000)]
Change a lit test to permit vendor specific clang version

A test manually checks for the string `__VERSION__ "Clang`. This needs
to permit vendor specific variants.

llvm-svn: 366166

5 years agoreland "add -fthinlto-index= option to clang-cl"
Bob Haarman [Tue, 16 Jul 2019 01:35:49 +0000 (01:35 +0000)]
reland "add -fthinlto-index= option to clang-cl"

Summary:
This is a reland of r366146, adding in the previously missing '--'
flag that prevents filenames from being interpreted as flags.

Original description:
This adds a -fthinlto-index= option to clang-cl, which allows it to
be used to drive ThinLTO backend passes. This allows clang-cl to be
used for distributed ThinLTO.

Tags: #clang
llvm-svn: 366165

5 years agoRe-land "[DebugInfo] Move function from line table to the prologue (NFC)"
Jonas Devlieghere [Tue, 16 Jul 2019 01:21:25 +0000 (01:21 +0000)]
Re-land "[DebugInfo] Move function from line table to the prologue (NFC)"

In LLDB, when parsing type units, we don't need to parse the whole line
table. Instead, we only need to parse the "support files" from the line
table prologue.

To make that possible, this patch moves the respective functions from
the LineTable into the Prologue. Because I don't think users of the
LineTable should have to know that these files come from the Prologue,

I've left the original methods in place, and made them redirect to the
LineTable.

Differential revision: https://reviews.llvm.org/D64774

llvm-svn: 366164

5 years ago[Sema] Suppress additional warnings for C's zero initializer
Peter Wu [Tue, 16 Jul 2019 01:13:36 +0000 (01:13 +0000)]
[Sema] Suppress additional warnings for C's zero initializer

Summary:
D28148 relaxed some checks for assigning { 0 } to a structure for all C
standards, but it failed to handle structures with non-integer
subobjects. Relax -Wmissing-braces checks for such structures, and add
some additional tests.

This fixes PR39931.

Patch By: al3xtjames

Reviewed By: Lekensteyn

Differential Revision: https://reviews.llvm.org/D61838

llvm-svn: 366163

5 years ago[InstructionSimplify] Apply sext/trunc after pointer stripping
Michael Liao [Tue, 16 Jul 2019 01:03:06 +0000 (01:03 +0000)]
[InstructionSimplify] Apply sext/trunc after pointer stripping

Summary:
- As the pointer stripping could trace through `addrspacecast` now, need
  to sext/trunc the offset to ensure it has the same width as the
  pointer after stripping.

Reviewers: jdoerfert

Subscribers: hiraditya, llvm-commits

Tags: #llvm

Differential Revision: https://reviews.llvm.org/D64768

llvm-svn: 366162

5 years ago[Target] Remove unused method Target::GetDefaultClangModuleSearchPaths
Alex Langford [Tue, 16 Jul 2019 01:02:32 +0000 (01:02 +0000)]
[Target] Remove unused method Target::GetDefaultClangModuleSearchPaths

llvm-svn: 366161

5 years agoRevert "[DebugInfo] Move function from line table to the prologue (NFC)"
Jonas Devlieghere [Tue, 16 Jul 2019 00:59:04 +0000 (00:59 +0000)]
Revert "[DebugInfo] Move function from line table to the prologue (NFC)"

This broke LLD, which I didn't have enabled.

llvm-svn: 366160

5 years agoAllow for vendor prefixes in a list test
Nathan Lanza [Tue, 16 Jul 2019 00:57:50 +0000 (00:57 +0000)]
Allow for vendor prefixes in a list test

Summary:
Preprocessor/init.c contains a line that explicitly checks for the
string

__VERSION__ "Clang{{.*}}

It's valid to have a toolchain configured to emit a vendor prefix
before the word Clang. e.g.

__VERSION__ "Vendor Clang{{.*}}

Subscribers: fedor.sergeev, cfe-commits

Tags: #clang

Differential Revision: https://reviews.llvm.org/D64772

llvm-svn: 366159

5 years ago[DebugInfo] Move function from line table to the prologue (NFC)
Jonas Devlieghere [Tue, 16 Jul 2019 00:37:17 +0000 (00:37 +0000)]
[DebugInfo] Move function from line table to the prologue (NFC)

In LLDB, when parsing type units, we don't need to parse the whole line
table. Instead, we only need to parse the "support files" from the line
table prologue.

To make that possible, this patch moves the respective functions from
the LineTable into the Prologue. Because I don't think users of the
LineTable should have to know that these files come from the Prologue,

I've left the original methods in place, and made them redirect to the
LineTable.

Differential revision: https://reviews.llvm.org/D64774

llvm-svn: 366158

5 years agoTemporarily revert "add -fthinlto-index= option to clang-cl"
Eric Christopher [Tue, 16 Jul 2019 00:02:40 +0000 (00:02 +0000)]
Temporarily revert "add -fthinlto-index= option to clang-cl"

This is causing testsuite failures on (at least) darwin release+asserts.

This reverts commit r366146.

llvm-svn: 366157

5 years agoUpdate some file changes, but there's a dependency loop so
Jason Molenda [Mon, 15 Jul 2019 23:55:22 +0000 (23:55 +0000)]
Update some file changes, but there's a dependency loop so
it doesn't quite work rigtht now.

llvm-svn: 366156

5 years agoTemporarily Revert "fix unnamed fiefield issue and add tests for __builtin_preserve_a...
Eric Christopher [Mon, 15 Jul 2019 23:49:31 +0000 (23:49 +0000)]
Temporarily Revert "fix unnamed fiefield issue and add tests for __builtin_preserve_access_index intrinsic"

The commit had tests that would only work with names in the IR.

This reverts commit r366076.

llvm-svn: 366155

5 years agoTemporarily Revert "[SLP] Recommit: Look-ahead operand reordering heuristic."
Eric Christopher [Mon, 15 Jul 2019 23:36:02 +0000 (23:36 +0000)]
Temporarily Revert "[SLP] Recommit: Look-ahead operand reordering heuristic."

As there are some reported miscompiles with AVX512 and performance regressions
in Eigen. Verified with the original committer and testcases will be forthcoming.

This reverts commit r364964.

llvm-svn: 366154

5 years agoRevert "[NewPM] Port Sancov"
Leonard Chan [Mon, 15 Jul 2019 23:18:31 +0000 (23:18 +0000)]
Revert "[NewPM] Port Sancov"

This reverts commit 5652f35817f07b16f8b3856d594cc42f4d7ee29c.

llvm-svn: 366153

5 years ago[DirectoryWatcher][linux] Fix for older kernels
Jan Korous [Mon, 15 Jul 2019 23:14:00 +0000 (23:14 +0000)]
[DirectoryWatcher][linux] Fix for older kernels

IN_EXCL_UNLINK exists since Linux 2.6.36

Differential Revision: https://reviews.llvm.org/D64764

llvm-svn: 366152

5 years ago[X86] Teach convertToThreeAddress to handle SUB with immediate
Craig Topper [Mon, 15 Jul 2019 23:07:56 +0000 (23:07 +0000)]
[X86] Teach convertToThreeAddress to handle SUB with immediate

We mostly avoid sub with immediate but there are a couple cases that can create them. One is the add 128, %rax -> sub -128, %rax trick in isel. The other is when a SUB immediate gets created for a compare where both the flags and the subtract value is used. If we are unable to linearize the SelectionDAG to satisfy the flag user and the sub result user from the same instruction, we will clone the sub immediate for the two uses. The one that produces flags will eventually become a compare. The other will have its flag output dead, and could then be considered for LEA creation.

I added additional test cases to add.ll to show the the sub -128 trick gets converted to LEA and a case where we don't need to convert it.

This showed up in the current codegen for PR42571.

Differential Revision: https://reviews.llvm.org/D64574

llvm-svn: 366151

5 years ago[TSan] Fix asm token error (again)
Julian Lettner [Mon, 15 Jul 2019 23:05:14 +0000 (23:05 +0000)]
[TSan] Fix asm token error (again)

llvm-svn: 366150

5 years ago[WebAssembly] Add missing utility methods for exnref type
Heejin Ahn [Mon, 15 Jul 2019 23:04:00 +0000 (23:04 +0000)]
[WebAssembly] Add missing utility methods for exnref type

Summary:
This adds missing utility methods and copy instruction handling for
`exnref` type and also adds tests.

`tee` instruction tests are missing because `isTee` is currently only
used in ExplicitLocals pass and testing that pass in mir requires
serialization of stackified registers in mir files, which is a bit
nontrivial because `MachineFunctionInfo` only has info of vreg numbers
(which are large integers) but not the mir's register numbers. But this
change is quite trivial anyway.

Reviewers: tlively

Subscribers: dschuff, sbc100, jgravelle-google, hiraditya, llvm-commits

Tags: #llvm

Differential Revision: https://reviews.llvm.org/D64705

llvm-svn: 366149

5 years ago[LanguageRuntime] Move ObjCLanguageRuntime into a plugin
Alex Langford [Mon, 15 Jul 2019 22:56:12 +0000 (22:56 +0000)]
[LanguageRuntime] Move ObjCLanguageRuntime into a plugin

Summary:
Following up to my CPPLanguageRuntime change, I'm moving
ObjCLanguageRuntime into a plugin as well.

Reviewers: JDevlieghere, compnerd, jingham, clayborg

Subscribers: mgorny, arphaman, lldb-commits

Differential Revision: https://reviews.llvm.org/D64763

llvm-svn: 366148

5 years ago[llvm-readelf] Print "File: lib.a(file.o)" info when dumping archive files.
Yuanfang Chen [Mon, 15 Jul 2019 22:52:01 +0000 (22:52 +0000)]
[llvm-readelf] Print "File: lib.a(file.o)" info when dumping archive files.

Match GNU readelf.

https://bugs.llvm.org/show_bug.cgi?id=35351

Reviewers: jhenderson, grimar, MaskRay, rupprecht

Reviewed by: jhenderson, MaskRay, grimar

Differential Revision: https://reviews.llvm.org/D64361

llvm-svn: 366147

5 years agoadd -fthinlto-index= option to clang-cl
Bob Haarman [Mon, 15 Jul 2019 22:50:04 +0000 (22:50 +0000)]
add -fthinlto-index= option to clang-cl

Summary:
This adds a -fthinlto-index= option to clang-cl, which allows it to
be used to drive ThinLTO backend passes. This allows clang-cl to be
used for distributed ThinLTO.

Reviewers: tejohnson, pcc, rnk

Subscribers: mehdi_amini, steven_wu, dexonsmith, arphaman, cfe-commits

Tags: #clang

Differential Revision: https://reviews.llvm.org/D64458

llvm-svn: 366146

5 years ago[WebAssembly] Rename except_ref type to exnref
Heejin Ahn [Mon, 15 Jul 2019 22:49:25 +0000 (22:49 +0000)]
[WebAssembly] Rename except_ref type to exnref

Summary:
We agreed to rename `except_ref` to `exnref` for consistency with other
reference types in
https://github.com/WebAssembly/exception-handling/issues/79. This also
renames WebAssemblyInstrExceptRef.td to WebAssemblyInstrRef.td in order
to use the file for other reference types in future.

Reviewers: dschuff

Subscribers: sbc100, jgravelle-google, hiraditya, sunfish, jfb, llvm-commits

Tags: #llvm

Differential Revision: https://reviews.llvm.org/D64703

llvm-svn: 366145

5 years agoRevert [llvm-lipo] Implement -create (with hardcoded alignments)
Shoaib Meenai [Mon, 15 Jul 2019 22:44:08 +0000 (22:44 +0000)]
Revert [llvm-lipo] Implement -create (with hardcoded alignments)

This reverts r366142 (git commit 67cee1dc7ee285b03372eb818a3894d35efa7394)

The test is failing on the Windows buildbots. Reverting while I
investigate.

llvm-svn: 366144

5 years ago[OpenCL] Make TableGen'd builtin tables and helper functions static
Tom Stellard [Mon, 15 Jul 2019 22:34:19 +0000 (22:34 +0000)]
[OpenCL] Make TableGen'd builtin tables and helper functions static

Reviewers: Pierre, Anastasia

Reviewed By: Anastasia

Subscribers: yaxunl, cfe-commits

Tags: #clang

Differential Revision: https://reviews.llvm.org/D64608

llvm-svn: 366143

5 years ago[llvm-lipo] Implement -create (with hardcoded alignments)
Shoaib Meenai [Mon, 15 Jul 2019 22:29:30 +0000 (22:29 +0000)]
[llvm-lipo] Implement -create (with hardcoded alignments)

Creates universal binary output file from input files. Currently uses
hard coded value for alignment.  Want to get the create functionality
approved before implementing the alignment function.

Patch by Anusha Basana <anusha.basana@gmail.com>

Differential Revision: https://reviews.llvm.org/D64102

llvm-svn: 366142

5 years ago[clang-fuzzer] Remove 'setUseOrcMCJITReplacement(false)' call.
Lang Hames [Mon, 15 Jul 2019 22:27:57 +0000 (22:27 +0000)]
[clang-fuzzer] Remove 'setUseOrcMCJITReplacement(false)' call.

The default value for this option (UseMCJITReplacement) is already false, and
OrcMCJITReplacement is going to have deprecation warnings attached in LLVM 9.0.
Removing this call removes a spurious warning.

llvm-svn: 366141

5 years ago[WebAssembly] Simplify regcopy.mir
Heejin Ahn [Mon, 15 Jul 2019 22:22:10 +0000 (22:22 +0000)]
[WebAssembly] Simplify regcopy.mir

Summary:
This deletes the ll templates from the functions because they don't need
them (mir files need ll templates only when they have function calls or
BB names that are not numbers).

This also renames the filename to `reg-copy.mir`, because I'm planning
to add some more `reg-*.mir` soon.

Reviewers: tlively

Subscribers: dschuff, sbc100, jgravelle-google, sunfish, llvm-commits

Tags: #llvm

Differential Revision: https://reviews.llvm.org/D64704

llvm-svn: 366140

5 years ago[WebAssembly] Assembler: support special floats: infinity / nan
Wouter van Oortmerssen [Mon, 15 Jul 2019 22:13:39 +0000 (22:13 +0000)]
[WebAssembly] Assembler: support special floats: infinity / nan

Summary:
These are emitted as identifiers by the InstPrinter, so we should
parse them as such. These could potentially clash with symbols of
the same name, but that is out of our (the WebAssembly backend) control.

Reviewers: dschuff

Subscribers: sbc100, jgravelle-google, aheejin, sunfish, llvm-commits

Tags: #llvm

Differential Revision: https://reviews.llvm.org/D64770

llvm-svn: 366139

5 years ago[DirectoryWatcher][test] Relax test assumptions
Jan Korous [Mon, 15 Jul 2019 22:11:51 +0000 (22:11 +0000)]
[DirectoryWatcher][test] Relax test assumptions

Workaround for FSEvents sometimes sending notifications for events that happened
before DirectoryWatcher was created.

This caused tests to be flaky on green dragon.

llvm-svn: 366138

5 years ago[DirectoryWatcher][NFC][test] Add typedef for enum
Jan Korous [Mon, 15 Jul 2019 22:11:28 +0000 (22:11 +0000)]
[DirectoryWatcher][NFC][test] Add typedef for enum

llvm-svn: 366137

5 years ago[ASan] Fix >80 character line.
Matt Morehouse [Mon, 15 Jul 2019 22:07:56 +0000 (22:07 +0000)]
[ASan] Fix >80 character line.

llvm-svn: 366136

5 years ago[AMDGPU] Enable merging m0 initializations.
Austin Kerbow [Mon, 15 Jul 2019 22:07:05 +0000 (22:07 +0000)]
[AMDGPU] Enable merging m0 initializations.

Summary:
Enable hoisting and merging m0 defs that are initialized with the same
immediate value. Fixes bug where removed instructions are not considered
to interfere with other inits, and make sure to not hoist inits before block
prologues.

Reviewers: rampitec, arsenm

Reviewed By: rampitec

Subscribers: kzhuravl, jvesely, wdng, nhaehnle, yaxunl, dstuttard, tpr, t-tye, hiraditya, llvm-commits

Tags: #llvm

Differential Revision: https://reviews.llvm.org/D64766

llvm-svn: 366135

5 years ago[ScopInfo][NFC] Add dot at the end of comment statement.
Dominik Adamski [Mon, 15 Jul 2019 22:01:55 +0000 (22:01 +0000)]
[ScopInfo][NFC] Add dot at the end of comment statement.

llvm-svn: 366134

5 years ago[mips] Print BEQZL and BNEZL pseudo instructions
Simon Atanasyan [Mon, 15 Jul 2019 21:46:38 +0000 (21:46 +0000)]
[mips] Print BEQZL and BNEZL pseudo instructions

One of the reasons - to be compatible with GNU tools.

llvm-svn: 366133

5 years agoAMDGPU: Use standalone MUBUF load patterns
Matt Arsenault [Mon, 15 Jul 2019 21:41:44 +0000 (21:41 +0000)]
AMDGPU: Use standalone MUBUF load patterns

We already do this for the flat and DS instructions, although it is
certainly uglier and more verbose.

This will allow using separate pattern definitions for extload and
zextload. Currently we get away with using a single PatFrag with
custom predicate code to check if the extension type is a zextload or
anyextload. The generic mechanism the global isel emitter understands
treats these as mutually exclusive. I was considering making the
pattern emitter accept zextload or sextload extensions for anyextload
patterns, but in global isel, the different extending loads have
distinct opcodes, and there is currently no mechanism for an opcode
matcher to try multiple (and there probably is very little need for
one beyond this case).

llvm-svn: 366132

5 years ago[TSan] Fix asm token error
Julian Lettner [Mon, 15 Jul 2019 21:22:57 +0000 (21:22 +0000)]
[TSan] Fix asm token error

llvm-svn: 366131

5 years ago[LoopUnroll+LoopUnswitch] do not transform loops containing callbr
Nick Desaulniers [Mon, 15 Jul 2019 21:16:29 +0000 (21:16 +0000)]
[LoopUnroll+LoopUnswitch] do not transform loops containing callbr

Summary:
There is currently a correctness issue when unrolling loops containing
callbr's where their indirect targets are being updated correctly to the
newly created labels, but their operands are not.  This manifests in
unrolled loops where the second and subsequent copies of callbr
instructions have blockaddresses of the label from the first instance of
the unrolled loop, which would result in nonsensical runtime control
flow.

For now, conservatively do not unroll the loop.  In the future, I think
we can pursue unrolling such loops provided we transform the cloned
callbr's operands correctly.

Such a transform and its legalities are being discussed in:
https://reviews.llvm.org/D64101

Link: https://bugs.llvm.org/show_bug.cgi?id=42489
Link: https://groups.google.com/forum/#!topic/clang-built-linux/z-hRWP9KqPI
Reviewers: fhahn, hfinkel, efriedma

Reviewed By: fhahn, hfinkel, efriedma

Subscribers: efriedma, hiraditya, zzheng, dmgreen, llvm-commits, pirama, kees, nathanchance, E5ten, craig.topper, chandlerc, glider, void, srhines

Tags: #llvm

Differential Revision: https://reviews.llvm.org/D64368

llvm-svn: 366130

5 years agoTableGen/GlobalISel: Fix handling of truncstore patterns
Matt Arsenault [Mon, 15 Jul 2019 21:15:20 +0000 (21:15 +0000)]
TableGen/GlobalISel: Fix handling of truncstore patterns

This was failing to import the AMDGPU truncstore patterns. The
truncating stores from 32-bit to 8/16 were then somehow being
incorrectly selected to a 4-byte store.

A separate check is emitted for the LLT size in comparison to the
specific memory VT, which looks strange to me but makes sense based on
the hierarchy of PatFrags used for the default truncstore PatFrags.

llvm-svn: 366129

5 years agoTableGen: Add address space to matchers
Matt Arsenault [Mon, 15 Jul 2019 20:59:42 +0000 (20:59 +0000)]
TableGen: Add address space to matchers

Currently AMDGPU uses a CodePatPred to check address spaces from the
MachineMemOperand. Introduce a new first class property so that the
existing patterns can be easily modified to uses the new generated
predicate, which will also be handled for GlobalISel.

I would prefer these to match against the pointer type of the
instruction, but that would be difficult to get working with
SelectionDAG compatbility. This is much easier for now and will avoid
a painful tablegen rewrite for all the loads and stores.

I'm also not sure if there's a better way to encode multiple address
spaces in the table, rather than putting the number to expect.

llvm-svn: 366128

5 years ago[clang] allow -fthinlto-index= without -x ir
Bob Haarman [Mon, 15 Jul 2019 20:51:44 +0000 (20:51 +0000)]
[clang] allow -fthinlto-index= without -x ir

Summary:
Previously, passing -fthinlto-index= to clang required that bitcode
files be explicitly marked by -x ir. This change makes us detect files
with object file extensions as bitcode files when -fthinlto-index= is
present, so that explicitly marking them is no longer necessary.
Explicitly specifying -x ir is still accepted and continues to be part
of the test case to ensure we continue to support it.

Reviewers: tejohnson, rnk, pcc

Subscribers: mehdi_amini, steven_wu, dexonsmith, arphaman, cfe-commits

Tags: #clang

Differential Revision: https://reviews.llvm.org/D64610

llvm-svn: 366127

5 years ago[TSan] Improve handling of stack pointer mangling in {set,long}jmp, pt.9
Julian Lettner [Mon, 15 Jul 2019 20:22:27 +0000 (20:22 +0000)]
[TSan] Improve handling of stack pointer mangling in {set,long}jmp, pt.9

Switch over to computing the xor key in C, instead of assembly for
Linux/AArch64.

llvm-svn: 366126

5 years agoAMDGPU/GlobalISel: Allow scalar s1 and/or/xor
Matt Arsenault [Mon, 15 Jul 2019 20:20:18 +0000 (20:20 +0000)]
AMDGPU/GlobalISel: Allow scalar s1 and/or/xor

If a 1-bit value is in a 32-bit VGPR, the scalar opcodes set SCC to
whether the result is 0. If the inputs are SCC, these can be copied to
a 32-bit SGPR to produce an SCC result.

llvm-svn: 366125

5 years ago[libc++] Implement P0433: deduction guides for <unordered_map>
Louis Dionne [Mon, 15 Jul 2019 20:06:01 +0000 (20:06 +0000)]
[libc++] Implement P0433: deduction guides for <unordered_map>

Thanks to Arthur O'Dwyer for the patch.

Differential Revision: https://reviews.llvm.org/D58590

llvm-svn: 366124

5 years agoARM MTE stack sanitizer.
Evgeniy Stepanov [Mon, 15 Jul 2019 20:02:23 +0000 (20:02 +0000)]
ARM MTE stack sanitizer.

Add "memtag" sanitizer that detects and mitigates stack memory issues
using armv8.5 Memory Tagging Extension.

It is similar in principle to HWASan, which is a software implementation
of the same idea, but there are enough differencies to warrant a new
sanitizer type IMHO. It is also expected to have very different
performance properties.

The new sanitizer does not have a runtime library (it may grow one
later, along with a "debugging" mode). Similar to SafeStack and
StackProtector, the instrumentation pass (in a follow up change) will be
inserted in all cases, but will only affect functions marked with the
new sanitize_memtag attribute.

Reviewers: pcc, hctim, vitalybuka, ostannard

Subscribers: srhines, mehdi_amini, javed.absar, kristof.beyls, hiraditya, cryptoad, steven_wu, dexonsmith, cfe-commits, llvm-commits

Tags: #clang, #llvm

Differential Revision: https://reviews.llvm.org/D64169

llvm-svn: 366123

5 years agoConstrain workaround to avoid affecting other buildbots
Eric Fiselier [Mon, 15 Jul 2019 19:53:42 +0000 (19:53 +0000)]
Constrain workaround to avoid affecting other buildbots

llvm-svn: 366122

5 years agoAMDGPU/GlobalISel: Select G_AND/G_OR/G_XOR
Matt Arsenault [Mon, 15 Jul 2019 19:50:07 +0000 (19:50 +0000)]
AMDGPU/GlobalISel: Select G_AND/G_OR/G_XOR

llvm-svn: 366121

5 years agoAMDGPU/GlobalISel: Don't constrain source register of VCC copies
Matt Arsenault [Mon, 15 Jul 2019 19:48:36 +0000 (19:48 +0000)]
AMDGPU/GlobalISel: Don't constrain source register of VCC copies

This is a hack until I come up with a better way of dealing with the
pseudo-register banks used for boolean values. If the use instruction
constrains the register, the selector for the def instruction won't
see that the bank was VCC. A 1-bit SReg_32 is could ambiguously have
been SCCRegBank or VCCRegBank in wave32.

This is necessary to successfully select branches with and and/or/xor
condition.

llvm-svn: 366120

5 years agoAMDGPU/GlobalISel: Fix selecting vcc->vcc bank copies
Matt Arsenault [Mon, 15 Jul 2019 19:46:48 +0000 (19:46 +0000)]
AMDGPU/GlobalISel: Fix selecting vcc->vcc bank copies

The extra test change is correct, although how it arrives there is a
bug that needs work. With wave32, the test for isVCC ambiguously
reports true for an SCC or VCC source. A new allocatable pseudo
register class for SCC may be necesssary.

llvm-svn: 366119

5 years agoAMDGPU/GlobalISel: Fix not constraining result reg of copies to VCC
Matt Arsenault [Mon, 15 Jul 2019 19:45:49 +0000 (19:45 +0000)]
AMDGPU/GlobalISel: Fix not constraining result reg of copies to VCC

llvm-svn: 366118

5 years agoAMDGPU/GlobalISel: Fix handling of sgpr (not scc bank) s1 to VCC
Matt Arsenault [Mon, 15 Jul 2019 19:44:07 +0000 (19:44 +0000)]
AMDGPU/GlobalISel: Fix handling of sgpr (not scc bank) s1 to VCC

This was emitting a copy from a 32-bit register to a 64-bit.

llvm-svn: 366117

5 years agoAMDGPU/GlobalISel: Custom legalize G_INSERT_VECTOR_ELT
Matt Arsenault [Mon, 15 Jul 2019 19:43:04 +0000 (19:43 +0000)]
AMDGPU/GlobalISel: Custom legalize G_INSERT_VECTOR_ELT

llvm-svn: 366116

5 years agoAMDGPU/GlobalISel: Custom legalize G_EXTRACT_VECTOR_ELT
Matt Arsenault [Mon, 15 Jul 2019 19:40:59 +0000 (19:40 +0000)]
AMDGPU/GlobalISel: Custom legalize G_EXTRACT_VECTOR_ELT

Turn the constant cases into G_EXTRACTs.

llvm-svn: 366115

5 years agoAMDGPU/GlobalISel: Fix G_ICMP for wave32
Matt Arsenault [Mon, 15 Jul 2019 19:39:31 +0000 (19:39 +0000)]
AMDGPU/GlobalISel: Fix G_ICMP for wave32

llvm-svn: 366114

5 years agoGlobalISel: Implement narrowScalar for vector extract/insert indexes
Matt Arsenault [Mon, 15 Jul 2019 19:37:34 +0000 (19:37 +0000)]
GlobalISel: Implement narrowScalar for vector extract/insert indexes

llvm-svn: 366113

5 years agoAMDGPU: Fix missing immarg from interp intrinsics
Matt Arsenault [Mon, 15 Jul 2019 19:12:00 +0000 (19:12 +0000)]
AMDGPU: Fix missing immarg from interp intrinsics

llvm-svn: 366110

5 years ago[FileCheck] Store line numbers as optional values
Thomas Preud'homme [Mon, 15 Jul 2019 19:04:56 +0000 (19:04 +0000)]
[FileCheck] Store line numbers as optional values

Summary:
Processing of command-line definition of variable and logic around
implicit not directives both reuse parsing code that expects a line
number to be defined. So far, a special line number of 0 was used for
those users of the parsing code where a line number does not make sense.
This commit instead represents line numbers as Optional values so that
they can be None for those cases.

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

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

Tags: #llvm

Differential Revision: https://reviews.llvm.org/D64639

llvm-svn: 366109