platform/upstream/llvm.git
6 years agoUse branch funnels for virtual calls when retpoline mitigation is enabled.
Peter Collingbourne [Fri, 9 Mar 2018 19:11:44 +0000 (19:11 +0000)]
Use branch funnels for virtual calls when retpoline mitigation is enabled.

The retpoline mitigation for variant 2 of CVE-2017-5715 inhibits the
branch predictor, and as a result it can lead to a measurable loss of
performance. We can reduce the performance impact of retpolined virtual
calls by replacing them with a special construct known as a branch
funnel, which is an instruction sequence that implements virtual calls
to a set of known targets using a binary tree of direct branches. This
allows the processor to speculately execute valid implementations of the
virtual function without allowing for speculative execution of of calls
to arbitrary addresses.

This patch extends the whole-program devirtualization pass to replace
certain virtual calls with calls to branch funnels, which are
represented using a new llvm.icall.jumptable intrinsic. It also extends
the LowerTypeTests pass to recognize the new intrinsic, generate code
for the branch funnels (x86_64 only for now) and lay out virtual tables
as required for each branch funnel.

The implementation supports full LTO as well as ThinLTO, and extends the
ThinLTO summary format used for whole-program devirtualization to
support branch funnels.

For more details see RFC:
http://lists.llvm.org/pipermail/llvm-dev/2018-January/120672.html

Differential Revision: https://reviews.llvm.org/D42453

llvm-svn: 327163

6 years ago[SymbolFilePDB] Keep searching until the file name is found for the pdb compiland
Aaron Smith [Fri, 9 Mar 2018 18:50:19 +0000 (18:50 +0000)]
[SymbolFilePDB] Keep searching until the file name is found for the pdb compiland

Reviewers: zturner, rnk, lldb-commits

Reviewed By: zturner

Subscribers: llvm-commits

Differential Revision: https://reviews.llvm.org/D44182

llvm-svn: 327162

6 years agoAvoid creating a Constant for each value in a ConstantDataSequential.
Alina Sbirlea [Fri, 9 Mar 2018 18:48:20 +0000 (18:48 +0000)]
Avoid creating a Constant for each value in a ConstantDataSequential.

Summary: We create a ConstantDataSequential (ConstantDataArray or ConstantDataVector) to avoid creating a Constant for each element in an array of constants. But them in AsmPrinter, we do create a ConstantFP for each element in the ConstantDataSequential. This triggers excessive memory use when generating large global FP constants.

Reviewers: bogner, lhames, t.p.northover

Subscribers: jlebar, sanjoy, llvm-commits

Differential Revision: https://reviews.llvm.org/D44277

llvm-svn: 327161

6 years agoDelay creating an alias for @@@.
Rafael Espindola [Fri, 9 Mar 2018 18:42:25 +0000 (18:42 +0000)]
Delay creating an alias for @@@.

With this we only create an alias for @@@ once we know if it should
use @ or @@. This avoids last minutes renames and hacks to handle MS
names.

This only handles the ELF writer. LTO still has issues with @@@
aliases.

llvm-svn: 327160

6 years ago[X86][AVX] createVariablePermute - fix v2i64/v2f64 VPERMILPD index creation.
Simon Pilgrim [Fri, 9 Mar 2018 18:37:56 +0000 (18:37 +0000)]
[X86][AVX] createVariablePermute - fix v2i64/v2f64 VPERMILPD index creation.

The input indices vector will put the index in bit0, but VPERMILPD actually selects off bit1 - so we need to scale accordingly.

llvm-svn: 327159

6 years agoTableGen: Remove space at EOL in TGLexer.{h,cpp}
Nicolai Haehnle [Fri, 9 Mar 2018 18:32:04 +0000 (18:32 +0000)]
TableGen: Remove space at EOL in TGLexer.{h,cpp}

Change-Id: Ica5f39470174e85f173d3b6db95789033f75ce17
llvm-svn: 327158

6 years ago[X86][SSE] createVariablePermute - move source vector canonicalization to top of...
Simon Pilgrim [Fri, 9 Mar 2018 18:08:08 +0000 (18:08 +0000)]
[X86][SSE] createVariablePermute - move source vector canonicalization to top of function. NFCI.

This is to make it easier to return early from the switch statement with custom lowering.

llvm-svn: 327157

6 years ago[ELF] Convert {read,write}*be to endianness-aware read/write.
Fangrui Song [Fri, 9 Mar 2018 18:03:22 +0000 (18:03 +0000)]
[ELF] Convert {read,write}*be to endianness-aware read/write.

Subscribers: emaste, nemanjai, arichardson, kbarton, llvm-commits

Differential Revision: https://reviews.llvm.org/D44227

llvm-svn: 327156

6 years ago[LV] Adding test for r327109
Renato Golin [Fri, 9 Mar 2018 18:02:36 +0000 (18:02 +0000)]
[LV] Adding test for r327109

llvm-svn: 327155

6 years agoELF: Do not create multiple thunks for the same virtual address.
Peter Collingbourne [Fri, 9 Mar 2018 17:54:43 +0000 (17:54 +0000)]
ELF: Do not create multiple thunks for the same virtual address.

This avoids creating multiple thunks for symbols with aliases or which
belong to ICF'd sections. This patch reduces the size of Chromium for
Android by 260KB (0.8% of .text).

Differential Revision: https://reviews.llvm.org/D44284

llvm-svn: 327154

6 years ago[AMDGPU] Supported ds_read_b128 generation; Widened vector length for local address...
Farhana Aleen [Fri, 9 Mar 2018 17:41:39 +0000 (17:41 +0000)]
[AMDGPU] Supported ds_read_b128 generation; Widened vector length for local address-space.

Summary: Starting from GCN 2nd generation, ISA supports ds_read_b128 on top of ds_read_b64.
         This patch supports ds_read_b128 instruction pattern and generation of this instruction.
         In the vectorizer, this patch also widen the vector length so that vectorizer generates
         128 bit loads for local address-space which gets translated to ds_read_b128.
         Since the performance benefit is not clear; compiler generates ds_read_b128 under -amdgpu-ds128.

Author: FarhanaAleen

Reviewed By: rampitec, arsenm

Subscribers: llvm-commits, AMDGPU

Differential Revision: https://reviews.llvm.org/D44210

llvm-svn: 327153

6 years ago[GISel]: Add helpers for easy building G_FCONSTANT along with matchers
Aditya Nandakumar [Fri, 9 Mar 2018 17:31:51 +0000 (17:31 +0000)]
[GISel]: Add helpers for easy building G_FCONSTANT along with matchers

Added helpers to build G_FCONSTANT, along with matching ConstantFP and
unit tests for the same.

Sample usage.

auto MIB = Builder.buildFConstant(s32, 0.5); // Build IEEESingle
For Matching the above

const ConstantFP* Tmp;
mi_match(DstReg, MRI, m_GFCst(Tmp));

https://reviews.llvm.org/D44128
reviewed by: volkan

llvm-svn: 327152

6 years ago[WebAssembly] Handle weak undefined functions with a synthetic stub
Nicholas Wilson [Fri, 9 Mar 2018 17:06:38 +0000 (17:06 +0000)]
[WebAssembly] Handle weak undefined functions with a synthetic stub

This error case is described in Linking.md. The operand for call requires
generation of a synthetic stub.

Differential Revision: https://reviews.llvm.org/D44028

llvm-svn: 327151

6 years ago[JumpThreading] Don't restrict cast-traversal to i1
Chad Rosier [Fri, 9 Mar 2018 16:43:46 +0000 (16:43 +0000)]
[JumpThreading] Don't restrict cast-traversal to i1

In r263618, JumpThreading learned to look trough simple cast instructions, but
only if the source of those cast instructions was a phi/cmp i1 (in an effort to
limit compile time effects). I think this condition is too restrictive. For
switches with limited value range, InstCombine will readily introduce an extra
trunc instruction to a smaller integer type (e.g. from i8 to i2), leaving us in
the somewhat perverse situation that jump-threading would work before running
instcombine, but not after. Since instcombine produces this pattern, I think we
need to consider it canonical and support it in JumpThreading.  In general,
for limiting recursion, I think the existing restriction to phi and cmp nodes
should be sufficient to avoid looking through unprofitable chains of
instructions.

Patch by Keno Fischer!
Differential Revision: https://reviews.llvm.org/D42262

llvm-svn: 327150

6 years ago[WebAssembly] Refactor order of creation for SyntheticFunction
Nicholas Wilson [Fri, 9 Mar 2018 16:43:05 +0000 (16:43 +0000)]
[WebAssembly] Refactor order of creation for SyntheticFunction

Previously we created __wasm_call_ctors with null InputFunction, and
added the InputFunction later. Now we create the SyntheticFunction with
null body, and set the body later.

Differential Revision: https://reviews.llvm.org/D44206

llvm-svn: 327149

6 years agoMove generic test to the Generic directory
Adrian Prantl [Fri, 9 Mar 2018 16:42:05 +0000 (16:42 +0000)]
Move generic test to the Generic directory

llvm-svn: 327148

6 years ago[AMDGPU] fix test to be independent of FP undef
Sanjay Patel [Fri, 9 Mar 2018 16:33:34 +0000 (16:33 +0000)]
[AMDGPU] fix test to be independent of FP undef

llvm-svn: 327147

6 years ago[WebAssembly] Disallow weak undefined globals in the object format
Nicholas Wilson [Fri, 9 Mar 2018 16:30:44 +0000 (16:30 +0000)]
[WebAssembly] Disallow weak undefined globals in the object format

This implements https://github.com/WebAssembly/tool-conventions/pull/47

Differential Revision: https://reviews.llvm.org/D44201

llvm-svn: 327146

6 years ago[sanitizer] Align & pad the allocator structures to the cacheline size
Kostya Kortchinsky [Fri, 9 Mar 2018 16:18:38 +0000 (16:18 +0000)]
[sanitizer] Align & pad the allocator structures to the cacheline size

Summary:
Both `SizeClassInfo` structures for the 32-bit primary & `RegionInfo`
structures for the 64-bit primary can be used by different threads, and as such
they should be aligned & padded to the cacheline size to avoid false sharing.
The former was padded but the array was not aligned, the latter was not padded
but we lucked up as the size of the structure was 192 bytes, and aligned by
the properties of `mmap`.

I plan on adding a couple of fields to the `RegionInfo`, and some highly
threaded tests pointed out that without proper padding & alignment, performance
was getting a hit - and it is going away with proper padding.

This patch makes sure that we are properly padded & aligned for both. I used
a template to avoid padding if the size is already a multiple of the cacheline
size. There might be a better way to do this, I am open to suggestions.

Reviewers: alekseyshl, dvyukov

Reviewed By: alekseyshl

Subscribers: kubamracek, delcypher, #sanitizers, llvm-commits

Differential Revision: https://reviews.llvm.org/D44261

llvm-svn: 327145

6 years ago[InstSimplify] fix FP infinite hex constant values in tests; NFC
Sanjay Patel [Fri, 9 Mar 2018 16:14:02 +0000 (16:14 +0000)]
[InstSimplify] fix FP infinite hex constant values in tests; NFC

Really should improve this...

llvm-svn: 327144

6 years agoRevert "[PowerPC] LSR tunings for PowerPC"
Stefan Pintilie [Fri, 9 Mar 2018 16:08:55 +0000 (16:08 +0000)]
Revert "[PowerPC] LSR tunings for PowerPC"

Revert the rest of the LST tune commit.
It seems that the LSR tune commit breaks internal tests.
Reverting the commit.

llvm-svn: 327143

6 years agoRevert "[PowerPC] Move test to correct location."
Stefan Pintilie [Fri, 9 Mar 2018 16:08:48 +0000 (16:08 +0000)]
Revert "[PowerPC] Move test to correct location."

Revert part of the LSR tune commit.

llvm-svn: 327142

6 years agoTidyup comment that was destroyed by clang-format. NFCI.
Simon Pilgrim [Fri, 9 Mar 2018 15:50:09 +0000 (15:50 +0000)]
Tidyup comment that was destroyed by clang-format. NFCI.

llvm-svn: 327141

6 years ago[X86][SSE] createVariablePermute - move index vector canonicalization to top of funct...
Simon Pilgrim [Fri, 9 Mar 2018 15:48:56 +0000 (15:48 +0000)]
[X86][SSE] createVariablePermute - move index vector canonicalization to top of function. NFCI.

This is to make it easier to return early from the switch statement with custom lowering.

llvm-svn: 327140

6 years agoTry to fix Windows bot by forcing "rm".
Tim Northover [Fri, 9 Mar 2018 15:44:59 +0000 (15:44 +0000)]
Try to fix Windows bot by forcing "rm".

llvm-svn: 327139

6 years ago[LangRef] make it clear that FP instructions do not have side effects
Sanjay Patel [Fri, 9 Mar 2018 15:27:48 +0000 (15:27 +0000)]
[LangRef] make it clear that FP instructions do not have side effects

Also, fix the undef vs. UB example to use 'sdiv' because that can trigger div-by-zero UB.

The existing text for the constrained intrinsics says:
"By default, LLVM optimization passes assume that the rounding mode is round-to-nearest
and that floating point exceptions will not be monitored. Constrained FP intrinsics are
used to support non-default rounding modes and accurately preserve exception behavior
without compromising LLVM’s ability to optimize FP code when the default behavior is
used."
...so the additional text with the normal FP opcodes should make the different modes
clear.

Differential Revision: https://reviews.llvm.org/D44216

llvm-svn: 327138

6 years ago[dsymutil] Unify error handling and add color
Jonas Devlieghere [Fri, 9 Mar 2018 15:22:42 +0000 (15:22 +0000)]
[dsymutil] Unify error handling and add color

We improved the handling of errors and warnings in dwarfdump's verifier
in rL314498. This patch does the same thing for dsymutil.

Differential revision: https://reviews.llvm.org/D44052

llvm-svn: 327137

6 years ago[OPENMP] Fix the address of the original variable in task reductions.
Alexey Bataev [Fri, 9 Mar 2018 15:20:30 +0000 (15:20 +0000)]
[OPENMP] Fix the address of the original variable in task reductions.

If initialization of the task reductions requires pointer to original
variable, which is stored in the threadprivate storage, we used the
address of this pointer instead.

llvm-svn: 327136

6 years agoCMake: Make libxml2 show up in --system-libs (PR36660)
Hans Wennborg [Fri, 9 Mar 2018 14:46:44 +0000 (14:46 +0000)]
CMake: Make libxml2 show up in --system-libs (PR36660)

lib/WindowsManifest/CMakeLists.txt adds it to LLVM_SYSTEM_LIBS on that
target, but it was never getting picked up in
tools/llvm-config/CMakeLists.txt.

Differential Revision: https://reviews.llvm.org/D44302

llvm-svn: 327135

6 years ago[SemaOverload] Fixed crash on code completion
Ilya Biryukov [Fri, 9 Mar 2018 14:43:29 +0000 (14:43 +0000)]
[SemaOverload] Fixed crash on code completion

Summary:
The relevant failing assertion message is:
../tools/clang/lib/Sema/SemaInit.cpp:8411: PerformCopyInitialization(): Assertion `InitE && "No initialization expression?"' failed.

See the added test case for a repro.

Reviewers: bkramer, sammccall, ioeric, hokein

Reviewed By: sammccall

Subscribers: cfe-commits

Differential Revision: https://reviews.llvm.org/D44300

llvm-svn: 327134

6 years agoMake TestCompletion work on windows
Pavel Labath [Fri, 9 Mar 2018 14:32:16 +0000 (14:32 +0000)]
Make TestCompletion work on windows

The test I added in r327110 is failing on windows because of "import
pexpect". However, this import is no longer necessary as these tests
don't use pexpect anymore.

In fact, it seems that all TestCompletion tests are passing on windows
after this, so I enable all of them.

llvm-svn: 327133

6 years ago[x86][aarch64] ask the backend whether it has a vector blend instruction
Sebastian Pop [Fri, 9 Mar 2018 14:29:21 +0000 (14:29 +0000)]
[x86][aarch64] ask the backend whether it has a vector blend instruction

The code to match and produce more x86 vector blends was enabled for all
architectures even though the transform may pessimize the code for other
architectures that do not provide a vector blend instruction.

Added an aarch64 testcase to check that a VZIP instruction is generated instead
of byte movs.

Differential Revision: https://reviews.llvm.org/D44118

llvm-svn: 327132

6 years ago[clangd] Fix failing lit test.
Haojian Wu [Fri, 9 Mar 2018 14:16:46 +0000 (14:16 +0000)]
[clangd] Fix failing lit test.

This test is missed in r327129.

llvm-svn: 327131

6 years ago[clangd-vscode] Add package-lock.json to .gitignore
Eric Liu [Fri, 9 Mar 2018 14:06:43 +0000 (14:06 +0000)]
[clangd-vscode] Add package-lock.json to .gitignore

llvm-svn: 327130

6 years ago[clangd] Use identifier range as the definition range.
Haojian Wu [Fri, 9 Mar 2018 14:00:34 +0000 (14:00 +0000)]
[clangd] Use identifier range as the definition range.

Summary: This also matches the range in symbol index.

Reviewers: sammccall

Subscribers: klimek, ilya-biryukov, jkorous-apple, ioeric, cfe-commits

Differential Revision: https://reviews.llvm.org/D44247

llvm-svn: 327129

6 years ago[llvm-mca] Move the logic that prints the summary into its own view. NFCI
Andrea Di Biagio [Fri, 9 Mar 2018 13:52:03 +0000 (13:52 +0000)]
[llvm-mca] Move the logic that prints the summary into its own view. NFCI

llvm-svn: 327128

6 years ago[clangd] Don't index template specializations.
Sam McCall [Fri, 9 Mar 2018 13:25:29 +0000 (13:25 +0000)]
[clangd] Don't index template specializations.

Summary:
These have different USRs than the underlying entity, but are not typically
interesting in their own right and can be numerous (e.g. generated traits).

Reviewers: ioeric

Subscribers: klimek, ilya-biryukov, jkorous-apple, cfe-commits

Differential Revision: https://reviews.llvm.org/D44298

llvm-svn: 327127

6 years ago[CMake] Properly conditionalize installation of lld libraries
David Zarzycki [Fri, 9 Mar 2018 13:09:36 +0000 (13:09 +0000)]
[CMake] Properly conditionalize installation of lld libraries

In what appears to be a copy-and-paste error, lld currently only
installs libraries if the lld tools are configured to build.

Instead, lld should allow the libraries to be installed even if the lld
tools are not being built. Additionally, if users want to only install
the tools and not the libraries, the LLVM way of doing that is by
checking for LLVM_INSTALL_TOOLCHAIN_ONLY.

This fixes PR35960.

llvm-svn: 327126

6 years ago[llvm-mca] Run clang-format on the source code. NFC
Andrea Di Biagio [Fri, 9 Mar 2018 12:50:42 +0000 (12:50 +0000)]
[llvm-mca] Run clang-format on the source code. NFC

llvm-svn: 327125

6 years ago[lld-link] Add support for /ignore:4037.
Nico Weber [Fri, 9 Mar 2018 12:41:04 +0000 (12:41 +0000)]
[lld-link] Add support for /ignore:4037.

Fixes PR36657.
https://reviews.llvm.org/D44286

llvm-svn: 327124

6 years ago[elf] Remove one copy of the section merging code
Pavel Labath [Fri, 9 Mar 2018 12:30:09 +0000 (12:30 +0000)]
[elf] Remove one copy of the section merging code

Summary:
Besides being superfluous, this double merging was actually wrong and
causing some sections to be added twice. The reason for that was that
the code assumes section IDs are unique in the section list, but this is
only true if all sections in the list come from the same object file.

Reviewers: fjricci, jankratochvil

Subscribers: emaste, lldb-commits, arichardson

Differential Revision: https://reviews.llvm.org/D44157

llvm-svn: 327123

6 years ago[asan] Try to unbreak arm build bots by only running the test on
Dan Liew [Fri, 9 Mar 2018 12:26:29 +0000 (12:26 +0000)]
[asan] Try to unbreak arm build bots by only running the test on
x86_64 and x86_64H (and not in the iOS simulator) where it seems
to work. We need to properly fix the test when time permits.

llvm-svn: 327122

6 years agoTableGen: Add a defset statement
Nicolai Haehnle [Fri, 9 Mar 2018 12:24:42 +0000 (12:24 +0000)]
TableGen: Add a defset statement

Allows capturing a list of concrete instantiated defs.

This can be combined with foreach to create parallel sets of def
instantiations with less repetition in the source. This purpose is
largely also served by multiclasses, but in some cases multiclasses
can't be used.

The motivating example for this change is having a large set of
intrinsics, which are generated from the IntrinsicsBackend.td file
included by Intrinsics.td, and a corresponding set of instruction
selection patterns, which are generated via the backend's .td files.

Multiclasses cannot be used to eliminate the redundancy in this case,
because a multiclass cannot span both LLVM's common .td files and
the backend .td files at the same time.

Change-Id: I879e35042dceea542a5e6776fad23c5e0e69e76b

Differential revision: https://reviews.llvm.org/D44109

llvm-svn: 327121

6 years agoTableGen: Allow arbitrary list values as ranges of foreach
Nicolai Haehnle [Fri, 9 Mar 2018 12:24:30 +0000 (12:24 +0000)]
TableGen: Allow arbitrary list values as ranges of foreach

The changes to FieldInit are required to make field references (Def.field)
work inside a ForeachDeclaration: previously, Def.field wasn't resolved
immediately when Def was already a fully resolved DefInit.

Change-Id: I9875baec2fc5aac8c2b249e45b9cf18c65ae699b
llvm-svn: 327120

6 years agoTableGen: Remove unused ParseForeachMode
Nicolai Haehnle [Fri, 9 Mar 2018 12:24:20 +0000 (12:24 +0000)]
TableGen: Remove unused ParseForeachMode

Use the default ParseValueMode instead of ParseForeachMode when
parsing the rule

  ForeachDeclaration ::= ID '=' '[' ValueList ']'

because the only difference between the two is how an open brace '{'
is handled at the end. In the context of foreach, the 'in' keyword
will appear after the ForeachDeclaration, so this special handling
of '{' is not required.

Change-Id: I4d86bb73bab9ec26752e1273e5213df77cf28d1d
llvm-svn: 327119

6 years agoTableGen: More helpful error messages
Nicolai Haehnle [Fri, 9 Mar 2018 12:24:14 +0000 (12:24 +0000)]
TableGen: More helpful error messages

Change-Id: Ic78afd0cd765fdb4cf1b7ecfb6bba22653ce6d29
llvm-svn: 327118

6 years agoTableGen: add !isa operation
Nicolai Haehnle [Fri, 9 Mar 2018 12:24:06 +0000 (12:24 +0000)]
TableGen: add !isa operation

Change-Id: Iddb724c3ae706d82933a2d82c91d07e0e36b30e3

Differential revision: https://reviews.llvm.org/D44105

llvm-svn: 327117

6 years ago[DebugInfo/AccelTable] Fix inconsistency in getDIEOffset implementations
Pavel Labath [Fri, 9 Mar 2018 11:58:59 +0000 (11:58 +0000)]
[DebugInfo/AccelTable] Fix inconsistency in getDIEOffset implementations

Summary:
Even though the getDIEOffset offset function was common for the two
accelerator table implementations, it was doing two different things:
for the Apple tables, it was returning the die offset relative to the
start of the section, whereas for DWARF v5 tables, it was relative to
the start of the CU.

I resolve this by renaming the function to getDIESectionOffset to make
it obvious what the function returns, and change the DWARF
implementation to return the section offset. I also keep the CU-relative
accessor, but only in the DWARF implementation (there is no way to get
this information for the Apple tables). This was not caught by existing
tests because the hand-written inputs also erroneously used section
offsets instead of CU-relative ones.

While looking at this, I noticed that the Apple implementation was not
fully correct either -- the header contains a DIEOffsetBase field, which
should be added to offsets encoded with the DW_FORM_ref*** family, but
this was not being used. This went unnoticed because all current writers
set this field to zero anyway. I fix this as well and add a hand-written
test which demonstrates the issue.

Reviewers: JDevlieghere, dblaikie

Subscribers: aprantl, llvm-commits

Differential Revision: https://reviews.llvm.org/D44202

llvm-svn: 327116

6 years ago[clang-tidy] fix header guard
Sam McCall [Fri, 9 Mar 2018 11:47:37 +0000 (11:47 +0000)]
[clang-tidy] fix header guard

llvm-svn: 327115

6 years ago[clang-tidy] Add check: replace string::find(...) == 0 with absl::StartsWith
Haojian Wu [Fri, 9 Mar 2018 10:47:14 +0000 (10:47 +0000)]
[clang-tidy] Add check: replace string::find(...) == 0 with absl::StartsWith

Patch by Niko Weh!

Reviewers: hokein

Subscribers: klimek, cfe-commits, ioeric, ilya-biryukov, ahedberg

Differential Revision: https://reviews.llvm.org/D43847

llvm-svn: 327111

6 years agoMove option parsing out of the Args class
Pavel Labath [Fri, 9 Mar 2018 10:39:40 +0000 (10:39 +0000)]
Move option parsing out of the Args class

Summary:
The args class is used in plenty of places (a lot of them in the lower lldb
layers) for representing a list of arguments, and most of these places don't
care about option parsing. Moving the option parsing out of the class removes
the largest external dependency (there are a couple more, but these are in
static functions), and brings us closer to being able to move it to the
Utility module).

The new home for these functions is the Options class, which was already used
as an argument to the parse calls, so this just inverts the dependency between
the two.

The functions are themselves are mainly just copied -- the biggest functional
change I've made to them is to avoid modifying the input Args argument (getopt
likes to permute the argument vector), as it was weird to have another class
reorder the entries in Args class. So now the functions don't modify the input
arguments, and (for those where it makes sense) return a new Args vector
instead. I've also made the addition of a "fake arg0" (required for getopt
compatibility) an implementation detail rather than a part of interface.

While doing that I noticed that ParseForCompletion function was recording the
option indexes in the shuffled vector, but then the consumer was looking up the
entries in the unshuffled one. This manifested itself as us not being able to
complete "watchpoint set variable foo --" (because getopt would move "foo" to
the end). Surprisingly all other completions (e.g. "watchpoint set variable foo
--w") were not affected by this. However, I couldn't find a comprehensive test
for command argument completion, so I consolidated the existing tests and added
a bunch of new ones.

Reviewers: davide, jingham, zturner

Subscribers: lldb-commits

Differential Revision: https://reviews.llvm.org/D43837

llvm-svn: 327110

6 years ago[LV] Fix vectorizer's isUniform() abuse triggers assert in SCEV
Renato Golin [Fri, 9 Mar 2018 10:31:31 +0000 (10:31 +0000)]
[LV] Fix vectorizer's isUniform() abuse triggers assert in SCEV

Fixes PR36311.

See more detailed analysis in
https://bugs.llvm.org/show_bug.cgi?id=36311.

isUniform() information is recomputed after LV started transforming the
underlying IR and that triggered an assert in SCEV.

From vectorizer's architectural perspective, such information, while
still useful in vector code gen, should not be recomputed after the
start of transforming the LLVM IR. Instead, we should collect and cache
such information during the analysis phase of LV and use the cached info
during code gen.

From the symptom perspective, this assert as it stands right now is not
very useful. Legality already rejected loops that would trigger the
assert. As such, commenting out the assert is NFC from vectorizer's
functionality perspective. On top of that, just above the assertion, we
check for unit-strided load/store or
gather scatter. Addresses can't be uniform below that check.

From vectorization theory point of view, we don't have to reject all
cases of stores to uniform addresses. Eventually, we should support
safe/profitable cases.

This patch resolves the issue by removing the useless assertion that is
invoking LAA's isUniform() that requires up-to-date DomTree ---- once
vector code gen starts modifying CFG, we don't have an up-to-date
DomTree.

Patch by Hideki Saito <hideki.saito@intel.com>.

llvm-svn: 327109

6 years ago[Support] Move syntax highlighting into support
Jonas Devlieghere [Fri, 9 Mar 2018 09:56:24 +0000 (09:56 +0000)]
[Support] Move syntax highlighting into support

Move the DWARF syntax highlighting into support. This has several
advantages, most notably that this makes the WithColor RAII wrapper
available outside libDebugInfo. Furthermore, several projects all have
their own code for handling colored output. This provides a place to
centralize it.

Differential revision: https://reviews.llvm.org/D44215

llvm-svn: 327108

6 years ago[AArch64] Fix use of a regex in the win-alloca.ll test. NFC.
Martin Storsjo [Fri, 9 Mar 2018 09:45:37 +0000 (09:45 +0000)]
[AArch64] Fix use of a regex in the win-alloca.ll test. NFC.

Check that the variable actually is the same as the one previously
matched.

llvm-svn: 327107

6 years ago[AMDGPU] Fixed V_DIV_FIXUP_F16 selection on GFX9
Stanislav Mekhanoshin [Fri, 9 Mar 2018 07:21:43 +0000 (07:21 +0000)]
[AMDGPU] Fixed V_DIV_FIXUP_F16 selection on GFX9

GFX9 should select opsel version.

Differential Revision: https://reviews.llvm.org/D44279

llvm-svn: 327106

6 years agoCodeGen: simplify and validate exception personalities
Saleem Abdulrasool [Fri, 9 Mar 2018 07:06:42 +0000 (07:06 +0000)]
CodeGen: simplify and validate exception personalities

Simplify the dispatching for the personality routines.  This really had
no test coverage previously, so add test coverage for the various cases.
This turns out to be pretty complicated as the various languages and
models interact to change personalities around.

You really should feel bad for the compiler if you are using exceptions.
There is no reason for this type of cruelty.

llvm-svn: 327105

6 years ago[X86] Remove duplicate isel pattern. NFC
Craig Topper [Fri, 9 Mar 2018 05:42:44 +0000 (05:42 +0000)]
[X86] Remove duplicate isel pattern. NFC

llvm-svn: 327104

6 years agoRevert "[clang-doc] Setup clang-doc frontend framework"
Julie Hockett [Fri, 9 Mar 2018 03:47:18 +0000 (03:47 +0000)]
Revert "[clang-doc] Setup clang-doc frontend framework"

This reverts commit r327102, since it was breaking the linux-abi-test on
x86.

llvm-svn: 327103

6 years ago[clang-doc] Setup clang-doc frontend framework
Julie Hockett [Fri, 9 Mar 2018 03:16:39 +0000 (03:16 +0000)]
[clang-doc] Setup clang-doc frontend framework

Setting up the mapper part of the frontend framework for a clang-doc
tool. It creates a series of relevant matchers for declarations, and
uses the ToolExecutor to traverse the AST and extract the matching
declarations and comments. The mapper serializes the extracted
information to individual records for reducing and eventually doc
generation.

For a more detailed overview of the tool, see the design document on the
mailing list: http://lists.llvm.org/pipermail/cfe-dev/2017-December/056203.html

Differential Revision: https://reviews.llvm.org/D41102

llvm-svn: 327102

6 years agoDon't treat .symver as a regular alias definition.
Rafael Espindola [Fri, 9 Mar 2018 03:13:37 +0000 (03:13 +0000)]
Don't treat .symver as a regular alias definition.

This patch starts simplifying the handling of .symver.

For now it just moves the responsibility for creating an alias down to
the streamer. With that the asm streamer can pass a .symver unchanged,
which is nice since gas cannot parse "foo@bar = zed".

In a followup I hope to move the handling down to the writer so that
we don't need special hacks for avoiding breaking names with @@@ on
windows.

llvm-svn: 327101

6 years agoAttempt to fix vecreduce-propagate-sd-flags.ll test.
Matt Morehouse [Fri, 9 Mar 2018 02:04:30 +0000 (02:04 +0000)]
Attempt to fix vecreduce-propagate-sd-flags.ll test.

Buildbots have been failing since r327079.

llvm-svn: 327100

6 years agoPR36645: Go looking for an appropriate array bound when constant-evaluating a
Richard Smith [Fri, 9 Mar 2018 02:00:01 +0000 (02:00 +0000)]
PR36645: Go looking for an appropriate array bound when constant-evaluating a
name of an array object.

llvm-svn: 327099

6 years ago[analyzer] MmapWriteExecChecker: Add support for mprotect().
Artem Dergachev [Fri, 9 Mar 2018 01:47:24 +0000 (01:47 +0000)]
[analyzer] MmapWriteExecChecker: Add support for mprotect().

mprotect() allows setting memory access flags similarly to mmap(),
causing similar security issues if these flags are needlessly broad.

Patch by David Carlier!

Differential Revision: https://reviews.llvm.org/D44250

llvm-svn: 327098

6 years agoI added CFLAGS etc to one part of the project file I should not have.
Jason Molenda [Fri, 9 Mar 2018 01:43:18 +0000 (01:43 +0000)]
I added CFLAGS etc to one part of the project file I should not have.

llvm-svn: 327097

6 years ago[CFG] [analyzer] Add construction context for implicit constructor conversions.
Artem Dergachev [Fri, 9 Mar 2018 01:39:59 +0000 (01:39 +0000)]
[CFG] [analyzer] Add construction context for implicit constructor conversions.

Implicit constructor conversions such as A a = B() are represented by
surrounding the constructor for B() with an ImplicitCastExpr of
CK_ConstructorConversion kind, similarly to how explicit constructor conversions
are surrounded by a CXXFunctionalCastExpr. Support this syntax pattern when
extracting the construction context for the implicit constructor that
performs the conversion.

Differential Revision: https://reviews.llvm.org/D44051

llvm-svn: 327096

6 years agoMore cleanups of debugserver project file and the libpmenergy/libpmsample
Jason Molenda [Fri, 9 Mar 2018 01:37:37 +0000 (01:37 +0000)]
More cleanups of debugserver project file and the libpmenergy/libpmsample
stuff.  Activate it when an internal SDK is selected.  Update the name of
the LDFLAGS to match the rest of the settings.  Update the default arch for
ios builds.

llvm-svn: 327095

6 years agoRevert "[ThinLTO] Keep available_externally symbols live"
Eric Christopher [Fri, 9 Mar 2018 01:25:18 +0000 (01:25 +0000)]
Revert "[ThinLTO] Keep available_externally symbols live"

This reverts commit r327041 and the followup attempts at fixing the testcase as they're still failing.

llvm-svn: 327094

6 years ago[X86] Remove SRAs from v16i8 multiply lowering on sse2 targets
Craig Topper [Fri, 9 Mar 2018 01:22:31 +0000 (01:22 +0000)]
[X86] Remove SRAs from v16i8 multiply lowering on sse2 targets

Previously we unpacked the even bytes of each input into the high byte of 16-bit elements then did an v8i16 arithmetic shift right by 8 bits to fill the upper bits of each word with sign bits. Then we did the v8i16 multiply and then masked to zero the upper 8-bits of each result. The similar was done for all the odd bytes. The results are then packed together with packuswb

Since we are masking each multiply result element to 8-bits, and those 8-bits are determined only by the lower 8-bits of each of the inputs, we don't need to fill the upper bits with sign bits. So we can just unpack into the low byte of each element and treat the upper bits as garbage. This is what gcc also does.

Differential Revision: https://reviews.llvm.org/D44267

llvm-svn: 327093

6 years agoLowerDbgDeclare: ignore dbg.declares for allocas with volatile access
Adrian Prantl [Fri, 9 Mar 2018 00:45:04 +0000 (00:45 +0000)]
LowerDbgDeclare: ignore dbg.declares for allocas with volatile access

There is no point in lowering a dbg.declare describing an alloca that
has volatile loads or stores as users, since the alloca cannot be
elided. Lowering the dbg.declare will result in larger debug info that
may also have worse coverage than just describing the alloca.

rdar://problem/34496278

llvm-svn: 327092

6 years agoMark the -overlap tests are "UNSUPPORTED: android". Android test harness doesn't...
Kuba Mracek [Fri, 9 Mar 2018 00:41:29 +0000 (00:41 +0000)]
Mark the -overlap tests are "UNSUPPORTED: android". Android test harness doesn't know how to handle suppression files.

llvm-svn: 327091

6 years ago[DOXYGEN] Fix doxygen and content issues in mmintrin.h
Douglas Yung [Fri, 9 Mar 2018 00:38:51 +0000 (00:38 +0000)]
[DOXYGEN] Fix doxygen and content issues in mmintrin.h

- Fix instruction mappings/listings for various intrinsics

This patch was made by Craig Flores

Differential Revision: https://reviews.llvm.org/D41517

llvm-svn: 327090

6 years ago[test] Skip a test which sporadically fails in its dsym variant
Vedant Kumar [Fri, 9 Mar 2018 00:34:43 +0000 (00:34 +0000)]
[test] Skip a test which sporadically fails in its dsym variant

There is a mailing list discussion re: r325927 about why this test fails
in the dsym variant. I've marked it skipped for now, until the issue is
resolved.

llvm-svn: 327089

6 years agoRemove unneeded per-arch sdk specifications from debugserver xcode project file.
Jason Molenda [Fri, 9 Mar 2018 00:32:56 +0000 (00:32 +0000)]
Remove unneeded per-arch sdk specifications from debugserver xcode project file.

llvm-svn: 327088

6 years agoRemove the explicit dependency on libpmenergy and libpmsample.
Jason Molenda [Fri, 9 Mar 2018 00:28:51 +0000 (00:28 +0000)]
Remove the explicit dependency on libpmenergy and libpmsample.

llvm-svn: 327087

6 years agoFix header comment on SHA1 code.
Eric Christopher [Fri, 9 Mar 2018 00:23:35 +0000 (00:23 +0000)]
Fix header comment on SHA1 code.

llvm-svn: 327086

6 years agoFixed two more sdk inconsistencies with the pmenergy stuff.
Jason Molenda [Fri, 9 Mar 2018 00:23:29 +0000 (00:23 +0000)]
Fixed two more sdk inconsistencies with the pmenergy stuff.

llvm-svn: 327085

6 years agoThree little cleanups in the debugserver xcode project file.
Jason Molenda [Fri, 9 Mar 2018 00:17:22 +0000 (00:17 +0000)]
Three little cleanups in the debugserver xcode project file.

1. Link against libpmenergy and pmsample unconditionally.  It is available on
macOS 10.10 ("Yosemite") and newer.  We're already linking against libcompression
unconditionally which is only available on macOS 10.11 & newer.

2. Change a few "sdk=macosx.internal"'s to sdk=macosx.

3. Clean up a few places where libcompression was being enabled inconsistently.

Note: the -DLLDB_ENERGY define is only set when building against the macosx.internal
SDK; it includes a header file that is not public.  We link against the dylibs
unconditionally for simplicity.

llvm-svn: 327084

6 years agoRevert "[DWARF] Fix mixing assembler -g with DWARF .file directives."
Paul Robinson [Fri, 9 Mar 2018 00:11:54 +0000 (00:11 +0000)]
Revert "[DWARF] Fix mixing assembler -g with DWARF .file directives."

This reverts commit d6d9ac1ab5039ba1fe0f63c36eac2bdd9f0a79c9.
aka r327073

llvm-svn: 327083

6 years agoutils: add a helper class to lit for captured substitutions
Saleem Abdulrasool [Fri, 9 Mar 2018 00:06:10 +0000 (00:06 +0000)]
utils: add a helper class to lit for captured substitutions

On Windows, if the substitution contains a back reference, it would
removed due to the replacement of the escape character in lit. Create a
helper class to avoid this which will simply ignore the replacement and
mark the substitution as having capture groups being referenced.

llvm-svn: 327082

6 years agoMark strcat-overlap.cc as "UNSUPPORTED: win32"
Kuba Mracek [Fri, 9 Mar 2018 00:03:09 +0000 (00:03 +0000)]
Mark strcat-overlap.cc as "UNSUPPORTED: win32"

llvm-svn: 327081

6 years agoMove lto-constmerge-odr.cc to Posix (it's failing on Windows).
Kuba Mracek [Thu, 8 Mar 2018 23:53:29 +0000 (23:53 +0000)]
Move lto-constmerge-odr.cc to Posix (it's failing on Windows).

llvm-svn: 327080

6 years agoPropagate flags to SDValue in SplitVecOp_VECREDUCE
Sameer AbuAsal [Thu, 8 Mar 2018 23:41:40 +0000 (23:41 +0000)]
Propagate flags to SDValue in SplitVecOp_VECREDUCE

 This patch is a fix for PR36642.

 While legalizing long vector types, make sure the smaller types get the
 flags of the wider type.

link: https://bugs.llvm.org/show_bug.cgi?id=36642
Change-Id: I0c2829639f094c862c10a6b51b342d4c2563e1fa
llvm-svn: 327079

6 years agoAdd a debug info testcase for the trvial_abi attribute.
Adrian Prantl [Thu, 8 Mar 2018 23:11:46 +0000 (23:11 +0000)]
Add a debug info testcase for the trvial_abi attribute.

llvm-svn: 327078

6 years agoFor llvm-objdump and Mach-O files, update the printing of some thread states
Kevin Enderby [Thu, 8 Mar 2018 23:10:38 +0000 (23:10 +0000)]
For llvm-objdump and Mach-O files, update the printing of some thread states
from core files.  I tested this against the couple of core files that were
getting errors about unknown thread flavors and it now produce the same output as
the Xcode otool-classic(1) tool.  Since the core files are huge I didn’t include
them as test cases.

rdar://38216356

llvm-svn: 327077

6 years agoamdgcn/fmax: fcanonicalize operands
Jan Vesely [Thu, 8 Mar 2018 23:01:01 +0000 (23:01 +0000)]
amdgcn/fmax: fcanonicalize operands

v_max instruction needs canonicalized operands.
Passes CTS on carrizo

Reviewer: Aaron Watry <awatry@gmail.com>
Signed-off-by: Jan Vesely <jan.vesely@rutgers.edu>
llvm-svn: 327076

6 years agoamdgcn/fmin: fcanonicalize operands
Jan Vesely [Thu, 8 Mar 2018 23:00:58 +0000 (23:00 +0000)]
amdgcn/fmin: fcanonicalize operands

v_min instruction needs canonicalized operands.
Passes CTS on carrizo

Reviewer: Aaron Watry <awatry@gmail.com>
Signed-off-by: Jan Vesely <jan.vesely@rutgers.edu>
llvm-svn: 327075

6 years ago[StaticAnalyzer] Fix some Clang-tidy modernize and Include What You Use warnings...
Eugene Zelenko [Thu, 8 Mar 2018 22:45:13 +0000 (22:45 +0000)]
[StaticAnalyzer] Fix some Clang-tidy modernize and Include What You Use warnings; other minor fixes (NFC).

llvm-svn: 327074

6 years ago[DWARF] Fix mixing assembler -g with DWARF .file directives.
Paul Robinson [Thu, 8 Mar 2018 22:39:47 +0000 (22:39 +0000)]
[DWARF] Fix mixing assembler -g with DWARF .file directives.

We were effectively overriding an explicit '.file' directive with info
for the assembler source.  That shouldn't happen.

Fixes PR36636.

Differential Revision: https://reviews.llvm.org/D44265

llvm-svn: 327073

6 years ago[DebugInfo] Add DW_AT_byte_size to vectors
Matt Davis [Thu, 8 Mar 2018 22:22:26 +0000 (22:22 +0000)]
[DebugInfo] Add DW_AT_byte_size to vectors

Summary:
This patch adds the DW_AT_byte_size dwarf attribute to vectors.
This fixes PR21924

LLVM will round a vector up to the next alignable address, which can result in
the vector's representation in the object file being larger than what the
debugger will calculate via NumberOfElements * ElementSize. In such a case calling sizeof(MyVec) in the source will result in a different value than what a debugger might present. This situation can occur because LLVM permits non-power of two 'vector_size' attributes.

Reviewers: echristo, dexonsmith, aprantl

Reviewed By: aprantl

Subscribers: probinson, aprantl, llvm-commits, JDevlieghere

Tags: #debug-info

Differential Revision: https://reviews.llvm.org/D44048

llvm-svn: 327072

6 years ago[Reassociate] fix test to be independent of FP undef
Sanjay Patel [Thu, 8 Mar 2018 22:05:27 +0000 (22:05 +0000)]
[Reassociate] fix test to be independent of FP undef

llvm-svn: 327071

6 years ago[Support] Pacify -Wsign-compare in unit test.
Benjamin Kramer [Thu, 8 Mar 2018 21:54:30 +0000 (21:54 +0000)]
[Support] Pacify -Wsign-compare in unit test.

llvm-svn: 327070

6 years ago[TargetLowering] Remove redundant if condition in SimplifySetcc. NFC
Craig Topper [Thu, 8 Mar 2018 21:53:36 +0000 (21:53 +0000)]
[TargetLowering] Remove redundant if condition in SimplifySetcc. NFC

We were checking the condition code a second time when we were already in a block with this same condition code check.

llvm-svn: 327069

6 years ago[asan] Fix bug where suppression of overlapping accesses was ignored on
Dan Liew [Thu, 8 Mar 2018 21:50:22 +0000 (21:50 +0000)]
[asan] Fix bug where suppression of overlapping accesses was ignored on
`strcpy()`, `strncpy()`, `strcat()`, and `strncat()`.

rdar://problem/35576899

Differential Revision: https://reviews.llvm.org/D43702

llvm-svn: 327068

6 years ago[DebugInfo] Move RangeListEntries instead of copying.
Benjamin Kramer [Thu, 8 Mar 2018 21:31:10 +0000 (21:31 +0000)]
[DebugInfo] Move RangeListEntries instead of copying.

This is needed for correctness as RangeListEntry is not copy-assignable,
which std::vector might rely on.

llvm-svn: 327067

6 years ago[AMDGPU] fix test to survive more FP undef constant folding
Sanjay Patel [Thu, 8 Mar 2018 21:30:56 +0000 (21:30 +0000)]
[AMDGPU] fix test to survive more FP undef constant folding

llvm-svn: 327066

6 years ago[NFC] Factor out a helper function for checking if a block has a potential early...
Philip Reames [Thu, 8 Mar 2018 21:25:30 +0000 (21:25 +0000)]
[NFC] Factor out a helper function for checking if a block has a potential early implicit exit.

llvm-svn: 327065

6 years agoLow-hanging fruit optimization in string::__move_assign().
Vedant Kumar [Thu, 8 Mar 2018 21:15:26 +0000 (21:15 +0000)]
Low-hanging fruit optimization in string::__move_assign().

shrink_to_fit() ends up doing a lot work to get information that we
already know since we just called clear(). This change seems concise
enough to be worth the couple extra lines and my benchmarks show that it
is indeed a pretty decent win. It looks like the same thing is going on
twice in __copy_assign_alloc(), but I didn't want to go overboard since
this is my first contribution to llvm/libc++.

Patch by Timothy VanSlyke!

Differential Revision: https://reviews.llvm.org/D41976

llvm-svn: 327064

6 years agoFix compilation failure with MSVC.
Zachary Turner [Thu, 8 Mar 2018 21:07:30 +0000 (21:07 +0000)]
Fix compilation failure with MSVC.

llvm-svn: 327063

6 years ago[asan] Fix a false positive ODR violation due to LTO ConstantMerge pass [compiler...
Kuba Mracek [Thu, 8 Mar 2018 21:02:52 +0000 (21:02 +0000)]
[asan] Fix a false positive ODR violation due to LTO ConstantMerge pass [compiler-rt part, take 3]

This fixes a false positive ODR violation that is reported by ASan when using LTO. In cases, where two constant globals have the same value, LTO will merge them, which breaks ASan's ODR detection. See the included testcase for an example.

Differential Revision: https://reviews.llvm.org/D43959

llvm-svn: 327062

6 years ago[asan] Fix a false positive ODR violation due to LTO ConstantMerge pass [llvm part...
Kuba Mracek [Thu, 8 Mar 2018 21:02:18 +0000 (21:02 +0000)]
[asan] Fix a false positive ODR violation due to LTO ConstantMerge pass [llvm part, take 3]

This fixes a false positive ODR violation that is reported by ASan when using LTO. In cases, where two constant globals have the same value, LTO will merge them, which breaks ASan's ODR detection.

Differential Revision: https://reviews.llvm.org/D43959

llvm-svn: 327061