platform/upstream/llvm.git
4 years agoFix multiple lifetime warning messages for range based for loop
Gabor Horvath [Mon, 12 Aug 2019 16:19:39 +0000 (16:19 +0000)]
Fix multiple lifetime warning messages for range based for loop

llvm-svn: 368588

4 years ago[ARM] Put some of the TTI costmodel behind hasNeon calls.
David Green [Mon, 12 Aug 2019 15:59:52 +0000 (15:59 +0000)]
[ARM] Put some of the TTI costmodel behind hasNeon calls.

This puts some of the calls in ARMTargetTransformInfo.cpp behind hasNeon()
checks, now that we have MVE, and updates all the tests accordingly.

Differential Revision: https://reviews.llvm.org/D63447

llvm-svn: 368587

4 years ago[ARM] Add or update a number of costmodel tests. NFC
David Green [Mon, 12 Aug 2019 15:40:27 +0000 (15:40 +0000)]
[ARM] Add or update a number of costmodel tests. NFC

This adds a number of cost model tests for ARM, useful for MVE. It also re-jigs
some of the existing tests to make them easier to update and read.

llvm-svn: 368586

4 years ago[scudo][standalone] Minor corrections
Kostya Kortchinsky [Mon, 12 Aug 2019 15:35:09 +0000 (15:35 +0000)]
[scudo][standalone] Minor corrections

Summary:
Few corrections with no functional change:
- replacing `%zd` with `%zu` all around: the values are unsigned
- prefer `MAP_ANONYMOUS` to `MAP_ANON` (it's deprecated)
- remove the unused `enum LinkerInitialized`
- mark a parameter as `UNUSED` in Fuchsia's `getRandom`
- correct the casing of a variable and use `nullptr` instead of 0 for
  pointers in `list.h`
- reorder some `typedef` to be consistent between `signed` and
  `unsigned`

Reviewers: eugenis, vitalybuka, morehouse, hctim

Reviewed By: vitalybuka, morehouse

Subscribers: delcypher, #sanitizers, llvm-commits

Tags: #llvm, #sanitizers

Differential Revision: https://reviews.llvm.org/D65660

llvm-svn: 368585

4 years ago[XCOFF] Use a single symbolic constant for the size of an embeded name. [NFC]
Sean Fertile [Mon, 12 Aug 2019 15:27:40 +0000 (15:27 +0000)]
[XCOFF] Use a single symbolic constant for the size of an embeded name. [NFC]

Convert SymbolNameSize and SectionNameSize into just `NameSize`. The length of
a name embeded in a symbol table entry or section header table entry is length 8
for Sections, Symbols and Files. No need to have a distinct constant for each
one. Also removes the Size argument to 'generateStringRef' as the size is
always 'XCOFF::NameSize'.

llvm-svn: 368584

4 years ago[InstCombine] add tests for scalar-select-of-vectors; NFC
Sanjay Patel [Mon, 12 Aug 2019 15:21:11 +0000 (15:21 +0000)]
[InstCombine] add tests for scalar-select-of-vectors; NFC

llvm-svn: 368583

4 years ago[lldb][NFC] Minor fixes for lldb_private::DiagnosticManager
Raphael Isemann [Mon, 12 Aug 2019 14:37:12 +0000 (14:37 +0000)]
[lldb][NFC] Minor fixes for lldb_private::DiagnosticManager

llvm-svn: 368582

4 years ago[clangd] Separate chunks with a space when rendering markdown
Ilya Biryukov [Mon, 12 Aug 2019 14:35:30 +0000 (14:35 +0000)]
[clangd] Separate chunks with a space when rendering markdown

Summary:
This results in better rendering of resulting markdown.

Especially noticeable in coc.nvim that does not have a visible horizontal
spaces around inline code blocks. More details and a screenshot from
coc.nvim can be found in https://github.com/clangd/clangd/issues/95.

Reviewers: sammccall

Reviewed By: sammccall

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

Tags: #clang

Differential Revision: https://reviews.llvm.org/D66086

llvm-svn: 368581

4 years agoRemove outdated comment about clang not populating src2dst_offset
Benjamin Kramer [Mon, 12 Aug 2019 14:33:46 +0000 (14:33 +0000)]
Remove outdated comment about clang not populating src2dst_offset

Clang has been setting this since r174293 (of 2013 vintage).

llvm-svn: 368580

4 years agoRevert r368339 "[MBP] Disable aggressive loop rotate in plain mode"
Hans Wennborg [Mon, 12 Aug 2019 14:23:13 +0000 (14:23 +0000)]
Revert r368339 "[MBP] Disable aggressive loop rotate in plain mode"

It caused assertions to fire when building Chromium:

  lib/CodeGen/LiveDebugValues.cpp:331: bool
  {anonymous}::LiveDebugValues::OpenRangesSet::empty() const: Assertion
  `Vars.empty() == VarLocs.empty() && "open ranges are inconsistent"' failed.

See https://crbug.com/992871#c3 for how to reproduce.

> Patch https://reviews.llvm.org/D43256 introduced more aggressive loop layout optimization which depends on profile information. If profile information is not available, the statically estimated profile information(generated by BranchProbabilityInfo.cpp) is used. If user program doesn't behave as BranchProbabilityInfo.cpp expected, the layout may be worse.
>
> To be conservative this patch restores the original layout algorithm in plain mode. But user can still try the aggressive layout optimization with -force-precise-rotation-cost=true.
>
> Differential Revision: https://reviews.llvm.org/D65673

llvm-svn: 368579

4 years ago[llvm-ar][NFC] Fix buildbot
Jordan Rupprecht [Mon, 12 Aug 2019 14:21:51 +0000 (14:21 +0000)]
[llvm-ar][NFC] Fix buildbot

llvm-svn: 368578

4 years ago[lldb] Remove undocumented return value from DiagnosticManager::PutString
Raphael Isemann [Mon, 12 Aug 2019 14:11:37 +0000 (14:11 +0000)]
[lldb] Remove undocumented return value from DiagnosticManager::PutString

The returned value is currently unused. It also seems to imply that
it somehow represents 'printf-style' the number of characters/bytes
written to some output stream (which is incorrect, as we only know
the actual size of the written message when we have rendered it,
e.g. via GetString and DiagnosticManagers have no associated
output stream).

llvm-svn: 368577

4 years ago[llvm-readobj] Downgrade 'PT_DYNAMIC segment offset + size exceeds the size of the...
Jordan Rupprecht [Mon, 12 Aug 2019 14:05:37 +0000 (14:05 +0000)]
[llvm-readobj] Downgrade 'PT_DYNAMIC segment offset + size exceeds the size of the file' from an error to a warning

Summary: This allows llvm-readobj to print other useful information for truncated files instead of giving up.

Reviewers: jhenderson, grimar, MaskRay

Reviewed By: jhenderson, grimar, MaskRay

Subscribers: llvm-commits

Tags: #llvm

Differential Revision: https://reviews.llvm.org/D66036

llvm-svn: 368576

4 years ago[X86][SSE] Add test showing missing demanded elts PSADBW handling
Simon Pilgrim [Mon, 12 Aug 2019 14:01:16 +0000 (14:01 +0000)]
[X86][SSE] Add test showing missing demanded elts PSADBW handling

llvm-svn: 368575

4 years agoRevert r368565: [CodeGen] Do the Simple Early Return in block-placement pass to optim...
Kang Zhang [Mon, 12 Aug 2019 14:00:31 +0000 (14:00 +0000)]
Revert r368565: [CodeGen] Do the Simple Early Return in block-placement pass to optimize the blocks

llvm-svn: 368574

4 years ago[llvm-ar] Accept file paths with windows format slashes
Owen Reynolds [Mon, 12 Aug 2019 14:00:28 +0000 (14:00 +0000)]
[llvm-ar] Accept file paths with windows format slashes

The internal representation of llvm-ar archives uses linux style slashes
for paths, no matter the OS. In the case of windows this meant file
paths input intending to match existing members would only match if
linux style slashes where used. This change allows either slash
direction to be input by the user.

This change includes removing an unnecessary call to normalisePath and
moving the call of another.

Differential Revision: https://reviews.llvm.org/D65743

llvm-svn: 368573

4 years ago[RISCV] Fix ICE in isDesirableToCommuteWithShift
Sam Elliott [Mon, 12 Aug 2019 13:51:00 +0000 (13:51 +0000)]
[RISCV] Fix ICE in isDesirableToCommuteWithShift

Summary:
Ana Pazos reported a bug where we were not checking that an APInt would
fit into 64-bits before calling `getSExtValue()`. This caused asserts when
compiling large constants, such as i128s, as happens when compiling compiler-rt.

This patch adds a testcase and makes the callback less error-prone.

Reviewers: apazos, asb, luismarques

Reviewed By: luismarques

Subscribers: hiraditya, rbar, johnrusso, simoncook, sabuasal, niosHD, kito-cheng, shiva0217, jrtc27, MaskRay, zzheng, edward-jones, rogfer01, MartinMosbeck, brucehoult, the_o, rkruppe, PkmX, jocewei, psnobl, benna, Jim, s.egerton, llvm-commits

Tags: #llvm

Differential Revision: https://reviews.llvm.org/D66081

llvm-svn: 368572

4 years ago[InstCombine] x /c fabs(x) -> copysign(1.0, x)
David Bolvansky [Mon, 12 Aug 2019 13:43:35 +0000 (13:43 +0000)]
[InstCombine] x /c fabs(x) -> copysign(1.0, x)

Summary:
x / fabs(x) -> copysign(1.0, x)
fabs(x) / x -> copysign(1.0, x)

Reviewers: spatel, foad, RKSimon, efriedma

Reviewed By: spatel

Subscribers: lebedev.ri, llvm-commits

Tags: #llvm

Differential Revision: https://reviews.llvm.org/D65898

llvm-svn: 368570

4 years ago[clangd] Added the vscode SemanticHighlighting feature code but did not enable it...
Johan Vikstrom [Mon, 12 Aug 2019 13:33:43 +0000 (13:33 +0000)]
[clangd] Added the vscode SemanticHighlighting feature code but did not enable it in the client.

Summary: Added the code for the StaticFeature that must be registered to the client. Also decoding the notification data into objects. Did not register it to the client yet.

Reviewers: hokein, ilya-biryukov

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

Tags: #clang

Differential Revision: https://reviews.llvm.org/D65998

llvm-svn: 368568

4 years ago[lldb][NFC] Add unit test for lldb_private::DiagnosticManager
Raphael Isemann [Mon, 12 Aug 2019 13:31:45 +0000 (13:31 +0000)]
[lldb][NFC] Add unit test for lldb_private::DiagnosticManager

llvm-svn: 368567

4 years ago[DebugInfo] Remove call sites when eliminating unreachable blocks
David Stenberg [Mon, 12 Aug 2019 13:22:29 +0000 (13:22 +0000)]
[DebugInfo] Remove call sites when eliminating unreachable blocks

Summary:
When eliminating an unreachable block we must remove any call site
information for calls residing in the block.

This was originally found on a downstream target, and the attached x86
test case was produced by hand-modifying some MIR.

Reviewers: aprantl, asowda, NikolaPrica, djtodoro, ivanbaev, vsk

Reviewed By: NikolaPrica, vsk

Subscribers: vsk, hiraditya, llvm-commits

Tags: #debug-info, #llvm

Differential Revision: https://reviews.llvm.org/D64500

llvm-svn: 368566

4 years ago[CodeGen] Do the Simple Early Return in block-placement pass to optimize the blocks
Kang Zhang [Mon, 12 Aug 2019 13:15:31 +0000 (13:15 +0000)]
[CodeGen] Do the Simple Early Return in block-placement pass to optimize the blocks

Summary:

In `block-placement` pass, it will create some patterns for unconditional we can do the simple early retrun.
But the `early-ret` pass is before `block-placement`, we don't want to run it again.
This patch is to do the simple early return to optimize the blocks at the last of `block-placement`.

Reviewed By: efriedma

Differential Revision: https://reviews.llvm.org/D63972

llvm-svn: 368565

4 years ago[llvm-ar][test] Correct tests marked as expected fails
Owen Reynolds [Mon, 12 Aug 2019 13:04:02 +0000 (13:04 +0000)]
[llvm-ar][test] Correct tests marked as expected fails

In diff D64802 I marked three tests as expected failures for darwin but
James Nagurne saw these fail on his downstream embedded ARM cross
compiler.
I believe XFAIL: system-darwin should be used instead of using XFAIL:
darwin due to the problem being related to the darwin host and not the
target.

Differential Revision: https://reviews.llvm.org/D65745

llvm-svn: 368564

4 years ago[clangd] Remove highlightings coming from non topLevelDecls from included files.
Johan Vikstrom [Mon, 12 Aug 2019 13:01:11 +0000 (13:01 +0000)]
[clangd] Remove highlightings coming from non topLevelDecls from included files.

Summary: It is possible to write include code from other files so that the decls from there do not become topLevelDecls (For example by including methods for a class). These Decls are not filtered by topLevelDecls and therefore SemanticHighlighting must manually check that every SLoc belongs in the main file. Otherwise there can be highlightings appearing in places where they should not.

Reviewers: hokein, ilya-biryukov

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

Tags: #clang

Differential Revision: https://reviews.llvm.org/D66083

llvm-svn: 368563

4 years ago[CrossTU] User docs: remove temporary limiation with macro expansion
Gabor Marton [Mon, 12 Aug 2019 12:46:28 +0000 (12:46 +0000)]
[CrossTU] User docs: remove temporary limiation with macro expansion

D65064, D64635, D64638 pathces solve the issue with macor expansion.

llvm-svn: 368562

4 years ago[OpenCL] Ignore parentheses for sampler initialization
Sven van Haastregt [Mon, 12 Aug 2019 12:44:26 +0000 (12:44 +0000)]
[OpenCL] Ignore parentheses for sampler initialization

The sampler handling logic in SemaInit.cpp would inadvertently treat
parentheses around sampler arguments as an implicit cast, leading to
an unreachable "can't implicitly cast lvalue to rvalue with
this cast kind".  Fix by ignoring parentheses once we are in the
sampler initializer case.

Differential Revision: https://reviews.llvm.org/D66080

llvm-svn: 368561

4 years agoRevert r368509 "[CodeGen] Do the Simple Early Return in block-placement pass to optim...
Hans Wennborg [Mon, 12 Aug 2019 12:43:51 +0000 (12:43 +0000)]
Revert r368509 "[CodeGen] Do the Simple Early Return in block-placement pass to optimize the blocks"

> In `block-placement` pass, it will create some patterns for unconditional we can do the simple early retrun.
> But the `early-ret` pass is before `block-placement`, we don't want to run it again.
> This patch is to do the simple early return to optimize the blocks at the last of `block-placement`.
>
> Reviewed By: efriedma
>
> Differential Revision: https://reviews.llvm.org/D63972

This also revertes follow-ups r368514 and r368532.

llvm-svn: 368560

4 years agoCleanup unused variable.
Andrey Churbanov [Mon, 12 Aug 2019 12:37:30 +0000 (12:37 +0000)]
Cleanup unused variable.

This patch fixes problem raised in post-review comments of the
https://reviews.llvm.org/D65285. Developers of ittnotify confirmed
that dll_path_ptr field of the __itt_global structure is never used
by ittnotify library, so it is safe to remove the dll_path array.

Differential Revision: https://reviews.llvm.org/D65885

llvm-svn: 368559

4 years ago[X86][SSE] ComputeKnownBits - add basic PSADBW handling
Simon Pilgrim [Mon, 12 Aug 2019 12:19:19 +0000 (12:19 +0000)]
[X86][SSE] ComputeKnownBits - add basic PSADBW handling

llvm-svn: 368558

4 years ago[X86][SSE] Add test showing missing compute known bits PSADBW handling
Simon Pilgrim [Mon, 12 Aug 2019 12:13:08 +0000 (12:13 +0000)]
[X86][SSE] Add test showing missing compute known bits PSADBW handling

The upper 48-bits of each i64 element is guaranteed to be zero.

llvm-svn: 368557

4 years agoNFC. Remove trailing whitespace in test
James Henderson [Mon, 12 Aug 2019 11:39:54 +0000 (11:39 +0000)]
NFC. Remove trailing whitespace in test

llvm-svn: 368556

4 years ago[llvm-strings] Improve testing of llvm-strings
James Henderson [Mon, 12 Aug 2019 11:36:11 +0000 (11:36 +0000)]
[llvm-strings] Improve testing of llvm-strings

This patch tidies up the llvm-strings testing by:

1. Adding comments to every test.
2. Getting rid of canned input files, and having the tests generate
   them on the fly (this makes the tests self-contained).
3. Adding missing test coverage.
4. Renaming some tests that weren't clear as to their purpose.
5. Adding extra checking of various cases, formatting etc.
6. Removing a test that didn't seem to have any useful purpose for
   testing llvm-strings.

Reviewed by: rupprecht, grimar, MaskRay

Differential Revision: https://reviews.llvm.org/D66015

llvm-svn: 368555

4 years ago[InstCombine] foldShiftIntoShiftInAnotherHandOfAndInICmp(): avoid constantexpr pitfai...
Roman Lebedev [Mon, 12 Aug 2019 11:28:02 +0000 (11:28 +0000)]
[InstCombine] foldShiftIntoShiftInAnotherHandOfAndInICmp(): avoid constantexpr pitfail (PR42962)

Instead of matching value and then blindly casting to BinaryOperator
just to get the opcode, just match instruction and do no cast.

Fixes https://bugs.llvm.org/show_bug.cgi?id=42962

llvm-svn: 368554

4 years ago[TargetLowering] SimplifyDemandedBits - call SimplifyMultipleUseDemandedBits for...
Simon Pilgrim [Mon, 12 Aug 2019 10:56:05 +0000 (10:56 +0000)]
[TargetLowering] SimplifyDemandedBits - call SimplifyMultipleUseDemandedBits for ISD::TRUNCATE

llvm-svn: 368553

4 years ago[OpenCL] Fix lang mode predefined macros for C++ mode.
Anastasia Stulova [Mon, 12 Aug 2019 10:44:07 +0000 (10:44 +0000)]
[OpenCL] Fix lang mode predefined macros for C++ mode.

In C++ mode we should only avoid adding __OPENCL_C_VERSION__,
all other predefined macros about the language mode are still
valid.

This change also fixes the language version check in the
headers accordingly.

Differential Revision: https://reviews.llvm.org/D65941

llvm-svn: 368552

4 years ago[ASTImporter] Fix for import of friend class template with definition.
Balazs Keri [Mon, 12 Aug 2019 10:07:38 +0000 (10:07 +0000)]
[ASTImporter] Fix for import of friend class template with definition.

Summary:
If there is a friend class template "prototype" (forward declaration)
and later a definition for it in the existing code, this existing
definition may be not found by ASTImporter because it is not linked
to the prototype (under the friend AST node). The problem is fixed by
looping over all found matching decls instead of break after the first
found one.

Reviewers: martong, a.sidorin, shafik, a_sidorin

Reviewed By: a_sidorin

Subscribers: rnkovacs, dkrupp, Szelethus, gamesh411, cfe-commits

Tags: #clang

Differential Revision: https://reviews.llvm.org/D65269

llvm-svn: 368551

4 years ago[ELF] Remove unnecessary assignment to `isPreemptible` in replaceWithDefined()
Fangrui Song [Mon, 12 Aug 2019 10:01:17 +0000 (10:01 +0000)]
[ELF] Remove unnecessary assignment to `isPreemptible` in replaceWithDefined()

After r368535, it is no longer used in the handling of VER_NDX_LOCAL.
Drop it.

llvm-svn: 368550

4 years ago[clangd] Drop diags from non-written #include.
Haojian Wu [Mon, 12 Aug 2019 09:35:04 +0000 (09:35 +0000)]
[clangd] Drop diags from non-written #include.

Summary: This would fix that we show weird diagnostics on random lines of the main file.

Reviewers: ilya-biryukov

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

Tags: #clang

Differential Revision: https://reviews.llvm.org/D66074

llvm-svn: 368549

4 years ago[CostModel][X86][AArch64] Add some tests for extractvalue
Roman Lebedev [Mon, 12 Aug 2019 09:24:33 +0000 (09:24 +0000)]
[CostModel][X86][AArch64] Add some tests for extractvalue

In https://reviews.llvm.org/D65148 it is suggested that
it should have zero cost, always.

llvm-svn: 368548

4 years agoImprove codegen for deque.
Eric Fiselier [Mon, 12 Aug 2019 07:51:05 +0000 (07:51 +0000)]
Improve codegen for deque.

This patch rewrites a few loops in deque and split_buffer to better
optimize the codegen. For constructors like
`deque<unsigned char> d(500000, 0);` this patch results in a 2x speedup.

The patch improves the codegen  in roughly three ways:

1. Changes do { ... } while (...) loops into more typical for loops.
  The optimizer can reason about normal looking loops better.

2. Split the iteration over a range into (A) iteration over the blocks,
then (B) iteration within the block. This nested structure helps LLVM
lower the inner loop to `memset`.

3. Do fewer things each iteration. Some of these loops were incrementing
  or changing 4-5 variables every loop (in addition to the
  construction). Previously most loops would increment the end pointer,
  the size, and decrement the count of remaining items to construct.
  Now we only increment a single pointer for most iterations.

llvm-svn: 368547

4 years ago[clangd] Highlighting auto variables as the deduced type.
Johan Vikstrom [Mon, 12 Aug 2019 07:45:12 +0000 (07:45 +0000)]
[clangd] Highlighting auto variables as the deduced type.

Summary:
Done in VisitDeclaratorDecl as the AutoTypeLoc is not deduced.
Scoped to only work for variables.
auto function return values need to be handled in a special way (separate patch for that).
auto's that are in lambdas ar enot highlighted as we don't highlight their underlying type (it's a RecordDecl, but the name is not an identifier so it returns in addToken).

Reviewers: hokein, ilya-biryukov

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

Tags: #clang

Differential Revision: https://reviews.llvm.org/D65996

llvm-svn: 368546

4 years ago[CrossTU] Fix problem with CrossTU AST load limit and progress messages.
Balazs Keri [Mon, 12 Aug 2019 07:15:29 +0000 (07:15 +0000)]
[CrossTU] Fix problem with CrossTU AST load limit and progress messages.

Summary:
Number of loaded ASTs is to be incremented only if the AST was really loaded
but not if it was returned from cache. At the same place the message about
a loaded AST is displayed.

Reviewers: martong, gamesh411

Reviewed By: martong

Subscribers: rnkovacs, dkrupp, Szelethus, gamesh411, cfe-commits

Tags: #clang

Differential Revision: https://reviews.llvm.org/D66054

llvm-svn: 368545

4 years ago[X86] Add some reduction add test cases that show sub-optimal code on avx2 and later.
Craig Topper [Mon, 12 Aug 2019 06:55:58 +0000 (06:55 +0000)]
[X86] Add some reduction add test cases that show sub-optimal code on avx2 and later.

For v4i8 and v8i8 when the reduction starts with a load we end up
shifting the data in the scalar domain and copying to the vector
domain a second time using a broadcast.

We already copied it to the vector domain once. It's better to
just shuffle it there.

llvm-svn: 368544

4 years ago[X86] Support -march=tigerlake
Pengfei Wang [Mon, 12 Aug 2019 01:29:46 +0000 (01:29 +0000)]
[X86] Support -march=tigerlake

Support -march=tigerlake for x86.
Compare with Icelake Client, It include 4 more new features ,they are
avx512vp2intersect, movdiri, movdir64b, shstk.

Patch by Xiang Zhang (xiangzhangllvm)

Differential Revision: https://reviews.llvm.org/D65840

llvm-svn: 368543

4 years agoFix pass dependency for LICM
Wenlei He [Sun, 11 Aug 2019 22:54:05 +0000 (22:54 +0000)]
Fix pass dependency for LICM

Expected to address buildbot failure http://lab.llvm.org:8011/builders/clang-x86_64-debian-fast/builds/16285 caused by D65060.

llvm-svn: 368542

4 years ago[X86] Remove redundant ';' chars ending IR lines in lit tests. NFC
Bjorn Pettersson [Sun, 11 Aug 2019 19:27:14 +0000 (19:27 +0000)]
[X86] Remove redundant ';' chars ending IR lines in lit tests. NFC

Reviewers: RKSimon, craig.topper

Reviewed By: craig.topper

Subscribers: llvm-commits

Tags: #llvm

Differential Revision: https://reviews.llvm.org/D66053

llvm-svn: 368541

4 years ago[SelectionDAG] Widen vector results of SMULFIX/UMULFIX/SMULFIXSAT
Bjorn Pettersson [Sun, 11 Aug 2019 19:27:06 +0000 (19:27 +0000)]
[SelectionDAG] Widen vector results of SMULFIX/UMULFIX/SMULFIXSAT

Summary:
After the commits that changed x86 backend to widen vectors
instead of using promotion some of our downstream tests
started to fail. It was noticed that WidenVectorResult has
been missing support for SMULFIX/UMULFIX/SMULFIXSAT. This
patch adds the missing functionality.

Reviewers: craig.topper, RKSimon

Reviewed By: craig.topper

Subscribers: hiraditya, llvm-commits

Tags: #llvm

Differential Revision: https://reviews.llvm.org/D66051

llvm-svn: 368540

4 years ago[clang-format] Expand AllowShortBlocksOnASingleLine for WebKit
Owen Pan [Sun, 11 Aug 2019 17:48:36 +0000 (17:48 +0000)]
[clang-format] Expand AllowShortBlocksOnASingleLine for WebKit

See PR40840

Differential Revision: https://reviews.llvm.org/D66059

llvm-svn: 368539

4 years ago[X86] Simplify some of the type checks in combineSubToSubus.
Craig Topper [Sun, 11 Aug 2019 17:36:49 +0000 (17:36 +0000)]
[X86] Simplify some of the type checks in combineSubToSubus.

If we have SSE2 we can handle any i8/i16 type and let
type legalization deal with it.

llvm-svn: 368538

4 years ago[X86] Don't use SplitOpsAndApply for ISD::USUBSAT.
Craig Topper [Sun, 11 Aug 2019 17:36:45 +0000 (17:36 +0000)]
[X86] Don't use SplitOpsAndApply for ISD::USUBSAT.

Target independent type legalization and custom lowering
should be able to handle it.

llvm-svn: 368537

4 years ago[ELF] Remove redundant isDefined() in Symbol::computeBinding() and delete one redunda...
Fangrui Song [Sun, 11 Aug 2019 17:03:00 +0000 (17:03 +0000)]
[ELF] Remove redundant isDefined() in Symbol::computeBinding() and delete one redundant call site

After r367869, VER_NDX_LOCAL can only be assigned to Defined and
CommonSymbol.  CommonSymbol becomes Defined after replaceCommonSymbols(),
thus `versionId == VER_NDX_LOCAL` will imply `isDefined()`.

In maybeReportUndefined(), computeBinding() is called when the symbol is
unknown to be Undefined. computeBinding() != STB_LOCAL will always be
true.

llvm-svn: 368536

4 years ago[ELF] Remove redundant !isPreemptible in Symbol::computeBinding()
Fangrui Song [Sun, 11 Aug 2019 16:12:07 +0000 (16:12 +0000)]
[ELF] Remove redundant !isPreemptible in Symbol::computeBinding()

!isPreemptible was added in r343668 to fix PR39104: symbols redefined by
replaceWithDefined() might be incorrectly considered STB_LOCAL if a
version script specified `local: *;`.

After r367869 (`config->defaultSymbolVersion` was removed), we will
assign VER_NDX_LOCAL to only regular Defined and CommonSymbol, not
Defined created by replaceWithDefined() (because scanVersionScript() is
called before scanRelocations()). The !isPreemptible is thus redundant
and can be deleted.

llvm-svn: 368535

4 years agoProperly detect temporary gsl::Owners through reference initialization chains.
Gabor Horvath [Sun, 11 Aug 2019 14:39:42 +0000 (14:39 +0000)]
Properly detect temporary gsl::Owners through reference initialization chains.

llvm-svn: 368534

4 years ago[ELF] Remove unnecessary assignment to `used` in replaceWithDefined
Fangrui Song [Sun, 11 Aug 2019 13:32:46 +0000 (13:32 +0000)]
[ELF] Remove unnecessary assignment to `used` in replaceWithDefined

`Symbol::used` is used by Undefined and SharedSymbol to record if a
.symtab entry is needed. It is of no use for Defined.

llvm-svn: 368533

4 years ago[NFC][CodeGen] Use while loop instead for loop in MachineBlockPlacement::optimizeBran...
Kang Zhang [Sun, 11 Aug 2019 12:58:50 +0000 (12:58 +0000)]
[NFC][CodeGen] Use while loop instead for loop in MachineBlockPlacement::optimizeBranches()
This will pass EXPENSIVE check.

llvm-svn: 368532

4 years ago[ARM] MVE spill vector test. NFC
David Green [Sun, 11 Aug 2019 09:12:57 +0000 (09:12 +0000)]
[ARM] MVE spill vector test. NFC

llvm-svn: 368531

4 years ago[MVE] Don't try to unroll vectorised MVE loops
David Green [Sun, 11 Aug 2019 08:53:18 +0000 (08:53 +0000)]
[MVE] Don't try to unroll vectorised MVE loops

Due to the nature of the beat system in the MVE architecture, along with tail
predication and low-overhead loops, unrolling has less benefit compared to
normal loops. You can not, for example, hide the latency of a load with other
instructions as you can for scalar code. Preventing unrolling also makes the
code easier to read and reason about.

So if a loop contains vector code, don't enable the runtime unrolling. At least
for the time being.

Differential Revision: https://reviews.llvm.org/D65803

llvm-svn: 368530

4 years ago[ARM] Permit auto-vectorization using MVE
David Green [Sun, 11 Aug 2019 08:42:57 +0000 (08:42 +0000)]
[ARM] Permit auto-vectorization using MVE

With enough codegen complete, we can now correctly report the number and size
of vector registers for MVE, allowing auto vectorisation. This also allows FP
auto-vectorization for MVE without -Ofast/-ffast-math, due to support for IEEE
FP arithmetic and parity between scalar and vector FP behaviour.

Patch by David Sherwood.

Differential Revision: https://reviews.llvm.org/D63728

llvm-svn: 368529

4 years agoProperly handle reference initialization when detecting gsl::Pointer initialization...
Gabor Horvath [Sun, 11 Aug 2019 08:05:28 +0000 (08:05 +0000)]
Properly handle reference initialization when detecting gsl::Pointer initialization chains

llvm-svn: 368528

4 years agoFix __clang_call_termiante's argument for foreign exceptions
Heejin Ahn [Sun, 11 Aug 2019 06:24:07 +0000 (06:24 +0000)]
Fix __clang_call_termiante's argument for foreign exceptions

Summary:
When exceptions are repeatedly thrown in the middle of handling another
exception, we call `__clang_call_terminate` with the exception pointer
(i32) as an argument. But in case of foreign exceptions, we don't have
the pointer, so we call the function with 0. (This requires
`__clang_call_terminate` can deal with 0 argument, which will be done
later)

But previously the 0 argument was not added as a `i32.const 0` but an
immediate by mistake, causing the `call` instruction to take not an i32
but rather an exnref, because an `exnref` is left on top of the value
stack if `br_on_exn` is not taken.

```
block i32
  br_on_exn 0, __cpp_exception
                               ;; exnref is on top of stack now
  i32.const 0                  ;; This was missing!
  call __clang_call_terminate
  unreachable
end
call __clang_call_terminate    ;; This takes i32 extracted by br_on_exn
```

Reviewers: dschuff

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

Tags: #llvm

Differential Revision: https://reviews.llvm.org/D65475

llvm-svn: 368527

4 years ago[LICM] Make Loop ICM profile aware
Wenlei He [Sun, 11 Aug 2019 06:05:35 +0000 (06:05 +0000)]
[LICM] Make Loop ICM profile aware

Summary:
Hoisting/sinking instruction out of a loop isn't always beneficial. Hoisting an instruction from a cold block inside a loop body out of the loop could hurt performance. This change makes Loop ICM profile aware - it now checks block frequency to make sure hoisting/sinking anly moves instruction to colder block.

Test Plan:

ninja check

Reviewers: asbirlea, sanjoy, reames, nikic, hfinkel, vsk

Reviewed By: asbirlea

Subscribers: fhahn, vsk, davidxl, xbolva00, hiraditya, llvm-commits

Tags: #llvm

Differential Revision: https://reviews.llvm.org/D65060

llvm-svn: 368526

4 years agoRevert "test commit"
Wenlei He [Sun, 11 Aug 2019 05:59:20 +0000 (05:59 +0000)]
Revert "test commit"

This reverts commit ad92a4a2769425ad0d39ac1dbb6282f6f51a1af7.

llvm-svn: 368525

4 years agotest commit
Wenlei He [Sun, 11 Aug 2019 05:50:28 +0000 (05:50 +0000)]
test commit

llvm-svn: 368524

4 years ago[X86] Remove some more code from combineShuffle that is no longer needed with widenin...
Craig Topper [Sun, 11 Aug 2019 02:17:18 +0000 (02:17 +0000)]
[X86] Remove some more code from combineShuffle that is no longer needed with widening legalization.

llvm-svn: 368523

4 years ago[X86] Remove some code from combineShuffle that seems largely unnecessary with wideni...
Craig Topper [Sun, 11 Aug 2019 02:08:38 +0000 (02:08 +0000)]
[X86] Remove some code from combineShuffle that seems largely unnecessary with widening legalization.

The test case that changed is probably better served through
allowing combineTruncatedArithmetic to create narrow vectors. It
also appears InstCombine would have simplified this test case
to remove the zext and trunc anyway.

llvm-svn: 368522

4 years ago[InstCombine][NFC] Use SimplifyAddInst() instead of SimplifyBinOp(Instruction::Binary...
Roman Lebedev [Sat, 10 Aug 2019 19:29:10 +0000 (19:29 +0000)]
[InstCombine][NFC] Use SimplifyAddInst() instead of SimplifyBinOp(Instruction::BinaryOps::Add, )

llvm-svn: 368521

4 years ago[NFC][InstCombine] Tests for shift amount reassociation in bittest with truncated...
Roman Lebedev [Sat, 10 Aug 2019 19:29:03 +0000 (19:29 +0000)]
[NFC][InstCombine] Tests for shift amount reassociation in bittest with truncated shl (PR42399)

trunc-of-shl:
  https://rise4fun.com/Alive/zGx
  https://rise4fun.com/Alive/sl0L
I.e. no extra legality check needed.

https://bugs.llvm.org/show_bug.cgi?id=42399

llvm-svn: 368520

4 years ago[InstCombine] Shift amount reassociation in bittest: relax one-use check when shiftin...
Roman Lebedev [Sat, 10 Aug 2019 19:28:54 +0000 (19:28 +0000)]
[InstCombine] Shift amount reassociation in bittest: relax one-use check when shifting constant

If one of the values being shifted is a constant, since the new shift
amount is known-constant, the new shift will end up being constant-folded
so, we don't need that one-use restriction then.

llvm-svn: 368519

4 years ago[InstCombine] Shift amount reassociation in bittest: drop pointless one-use restriction
Roman Lebedev [Sat, 10 Aug 2019 19:28:44 +0000 (19:28 +0000)]
[InstCombine] Shift amount reassociation in bittest: drop pointless one-use restriction

That one-use restriction is not needed for correctness - we have already
ensured that one of the shifts will go away, so we know we won't increase
the instruction count. So there is no need for that restriction.

llvm-svn: 368518

4 years ago[NFC][InstCombine] Tests for shift amount reassociation in bittest with shift of...
Roman Lebedev [Sat, 10 Aug 2019 19:28:12 +0000 (19:28 +0000)]
[NFC][InstCombine] Tests for shift amount reassociation in bittest with shift of const

llvm-svn: 368517

4 years agoAdd support for FreeBSD's LD_32_LIBRARY_PATH
Dimitry Andric [Sat, 10 Aug 2019 19:07:38 +0000 (19:07 +0000)]
Add support for FreeBSD's LD_32_LIBRARY_PATH

Summary:
Because the dynamic linker for 32-bit executables on 64-bit FreeBSD uses
the environment variable `LD_32_LIBRARY_PATH` instead of
`LD_LIBRARY_PATH` to find needed dynamic libraries, running the 32-bit
parts of the dynamic ASan tests will fail with errors similar to:

```
ld-elf32.so.1: Shared object "libclang_rt.asan-i386.so" not found, required by "Asan-i386-inline-Dynamic-Test"
```

This adds support for setting up `LD_32_LIBRARY_PATH` for the unit and
regression tests.  It will likely also require a minor change to the
`TestingConfig` class in `llvm/utils/lit/lit`.

Reviewers: emaste, kcc, rnk, arichardson

Reviewed By: arichardson

Subscribers: kubamracek, krytarowski, fedor.sergeev, delcypher, #sanitizers, llvm-commits

Tags: #llvm, #sanitizers

Differential Revision: https://reviews.llvm.org/D65772

llvm-svn: 368516

4 years ago[X86][SSE] Lower shuffle as ANY_EXTEND_VECTOR_INREG
Simon Pilgrim [Sat, 10 Aug 2019 16:46:07 +0000 (16:46 +0000)]
[X86][SSE] Lower shuffle as ANY_EXTEND_VECTOR_INREG

On SSE41+ targets we always lower vector shuffles to ZERO_EXTEND_VECTOR_INREG, even if we don't need the extended bits.

This patch relaxes this so that we lower to ANY_EXTEND_VECTOR_INREG if we can, meaning that shuffle combines have a better idea of what elements need to be kept zero. This helps the multiple reduction code as we can now combine away a lot more of the pack+extend codes.

Differential Revision: https://reviews.llvm.org/D65741

llvm-svn: 368515

4 years ago[NFC][CodeGen] Modify the PI++ to ++PI in MachineBlockPlacement::optimizeBranches()
Kang Zhang [Sat, 10 Aug 2019 16:23:17 +0000 (16:23 +0000)]
[NFC][CodeGen] Modify the PI++ to ++PI in MachineBlockPlacement::optimizeBranches()

llvm-svn: 368514

4 years ago[TableGen] Correct the shift to the proper bit width.
Michael Liao [Sat, 10 Aug 2019 16:15:06 +0000 (16:15 +0000)]
[TableGen] Correct the shift to the proper bit width.

- Replace the previous 32-bit shift with 64-bit one matching `OpInit`.

llvm-svn: 368513

4 years ago[Reassociate] try harder to convert negative FP constants to positive
Sanjay Patel [Sat, 10 Aug 2019 13:17:54 +0000 (13:17 +0000)]
[Reassociate] try harder to convert negative FP constants to positive

This is an extension of a transform that tries to produce positive floating-point
constants to improve canonicalization (and hopefully lead to more reassociation
and CSE).

The original patches were:
D4904
D5363 (rL221721)

But as the test diffs show, these were limited to basic patterns by walking from
an instruction to its single user rather than recursively moving up the def-use
sequence. No fast-math is required here because we're only rearranging implicit
FP negations in intermediate ops.

A motivating bug is:
https://bugs.llvm.org/show_bug.cgi?id=32939

Differential Revision: https://reviews.llvm.org/D65954

llvm-svn: 368512

4 years ago[lldb] Fix dynamic_cast by no longer failing on variable without metadata
Raphael Isemann [Sat, 10 Aug 2019 10:56:17 +0000 (10:56 +0000)]
[lldb] Fix dynamic_cast by no longer failing on variable without metadata

Summary:
Our IR rewriting infrastructure currently fails when it encounters a variable which has no metadata associated.
This causes dynamic_cast to fail as in this case IRForTarget considers the type info pointers ('@_ZTI...') to be
variables without associated metadata. As there are no variables for these internal variables, this is actually
not an error and dynamic_cast would work fine if we didn't throw this error.

This patch fixes this by removing this diagnostics code. In case we would actually hit a variable that has no
metadata (but is supposed to have), we still have the error in the expression log so this shouldn't make it
harder to diagnose any missing metadata errors.

This patch should fix dynamic_cast and also adds a bunch of test coverage to that language feature.

Fixes rdar://10813639

Reviewers: davide, labath

Reviewed By: labath

Subscribers: friss, labath, abidh, lldb-commits

Tags: #lldb

Differential Revision: https://reviews.llvm.org/D65932

llvm-svn: 368511

4 years ago[clang] Fixed x86 cpuid NSC signature
Raphael Isemann [Sat, 10 Aug 2019 10:14:01 +0000 (10:14 +0000)]
[clang] Fixed x86 cpuid NSC signature

Summary:
The signature "Geode by NSC" for NSC vendor is wrong.
In lib/Headers/cpuid.h, signature_NSC_edx and signature_NSC_ecx constants are inverted (cpuid signature order is ebx # edx # ecx).

Reviewers: teemperor, rsmith, craig.topper

Reviewed By: teemperor, craig.topper

Subscribers: craig.topper, cfe-commits

Tags: #clang

Differential Revision: https://reviews.llvm.org/D65978

llvm-svn: 368510

4 years ago[CodeGen] Do the Simple Early Return in block-placement pass to optimize the blocks
Kang Zhang [Sat, 10 Aug 2019 09:58:52 +0000 (09:58 +0000)]
[CodeGen] Do the Simple Early Return in block-placement pass to optimize the blocks

Summary:

In `block-placement` pass, it will create some patterns for unconditional we can do the simple early retrun.
But the `early-ret` pass is before `block-placement`, we don't want to run it again.
This patch is to do the simple early return to optimize the blocks at the last of `block-placement`.

Reviewed By: efriedma

Differential Revision: https://reviews.llvm.org/D63972

llvm-svn: 368509

4 years ago[modulemap] Add AArch64SVEACLETypes.def
Kristina Brooks [Sat, 10 Aug 2019 08:21:14 +0000 (08:21 +0000)]
[modulemap] Add AArch64SVEACLETypes.def

Update modulemap with a new textual header.

llvm-svn: 368508

4 years ago[clang-format] Add SpaceInEmptyBlock option for WebKit
Owen Pan [Sat, 10 Aug 2019 07:51:21 +0000 (07:51 +0000)]
[clang-format] Add SpaceInEmptyBlock option for WebKit

See PR40840

Differential Revision: https://reviews.llvm.org/D65925

llvm-svn: 368507

4 years ago[X86] Match the IR pattern form movmsk on SSE1 only targets where v4i32 isn't legal
Craig Topper [Sat, 10 Aug 2019 07:51:13 +0000 (07:51 +0000)]
[X86] Match the IR pattern form movmsk on SSE1 only targets where v4i32 isn't legal

Summary:
This patch adds a special DAG combine for SSE1 to recognize the IR pattern InstCombine gives us for movmsk. This only does the recognition for a few cases where its obvious the input won't be scalarized resulting in building a vector just do to the movmsk. I've made it separate from our existing matching for movmsk since that's called in multiple places and I didn't spend time to see if the other callers would make sense here. Plus the restrictions and additional checks would complicate that.

This fixes the case from PR42870. Buts its probably still broken the presence of logic ops feeding the movmsk pattern which would further hide the v4f32 type.

Reviewers: spatel, RKSimon, xbolva00

Subscribers: hiraditya, llvm-commits

Tags: #llvm

Differential Revision: https://reviews.llvm.org/D65689

llvm-svn: 368506

4 years ago[X86] Improve the diagnostic for larger than 4-bit immediate for vpermil2pd/ps. Only...
Craig Topper [Sat, 10 Aug 2019 04:28:52 +0000 (04:28 +0000)]
[X86] Improve the diagnostic for larger than 4-bit immediate for vpermil2pd/ps. Only allow MCConstantExprs.

llvm-svn: 368505

4 years ago[Sanitizer] Reenable getusershell interception
David Carlier [Sat, 10 Aug 2019 03:35:54 +0000 (03:35 +0000)]
[Sanitizer] Reenable getusershell interception

and disabling it forAndroid.

Reviewers: krytarowski, vitalybuka

Reviewed By: krytarowski

Differential Revision: https://reviews.llvm.org/D66027

llvm-svn: 368504

4 years ago[X86] Fix stack probe issue on windows32.
Luo, Yuanke [Sat, 10 Aug 2019 02:49:02 +0000 (02:49 +0000)]
[X86] Fix stack probe issue on windows32.

Summary:
On windows if the frame size exceed 4096 bytes, compiler need to
generate a call to _alloca_probe. X86CallFrameOptimization pass
changes the reserved stack size and cause of stack probe function
not be inserted. This patch fix the issue by detecting the call
frame size, if the size exceed 4096 bytes, drop X86CallFrameOptimization.

Reviewers: craig.topper, wxiao3, annita.zhang, rnk, RKSimon

Reviewed By: rnk

Subscribers: hiraditya, llvm-commits

Tags: #llvm

Differential Revision: https://reviews.llvm.org/D65923

llvm-svn: 368503

4 years ago[MemDep] allow to select block-scan-limit when constructing MemoryDependenceAnalysis
Fedor Sergeev [Sat, 10 Aug 2019 01:23:38 +0000 (01:23 +0000)]
[MemDep] allow to select block-scan-limit when constructing MemoryDependenceAnalysis

Introducing non-global control for default block-scan-limit in MemDep analysis.
Useful when there are many compilations per initialized LLVM instance (e.g. JIT).

Reviewed By: asbirlea
Tags: #llvm
Differential Revision: https://reviews.llvm.org/D65806

llvm-svn: 368502

4 years agoFix a false positive warning when initializing members with gsl::Owners.
Gabor Horvath [Sat, 10 Aug 2019 00:32:29 +0000 (00:32 +0000)]
Fix a false positive warning when initializing members with gsl::Owners.

llvm-svn: 368501

4 years ago[clangd] Disallow extraction of expression-statements.
Sam McCall [Fri, 9 Aug 2019 23:40:54 +0000 (23:40 +0000)]
[clangd] Disallow extraction of expression-statements.

Summary:
I split out the "extract parent instead of this" logic from the "this isn't
worth extracting" logic (now in eligibleForExtraction()), because I found it
hard to reason about.

While here, handle overloaded as well as builtin assignment operators.

Also this uncovered a bug in getCallExpr() which I fixed.

Reviewers: SureYeaah

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

Tags: #clang

Differential Revision: https://reviews.llvm.org/D65337

llvm-svn: 368500

4 years agoAttempt to reapply "Even more warnings utilizing gsl::Owner/gsl::Pointer annotations"
Gabor Horvath [Fri, 9 Aug 2019 23:03:50 +0000 (23:03 +0000)]
Attempt to reapply "Even more warnings utilizing gsl::Owner/gsl::Pointer annotations"

llvm-svn: 368499

4 years agoclangd: use -j for background index pool
Sam McCall [Fri, 9 Aug 2019 23:03:32 +0000 (23:03 +0000)]
clangd: use -j for background index pool

Summary:
clangd supports a -j option to limit the amount of threads to use for parsing
TUs. However, when using -background-index (the default in later versions of
clangd), the parallelism used by clangd defaults to the hardware_parallelisn,
i.e. number of physical cores.

On shared hardware environments, with large projects, this can significantly
affect performance with no way to tune it down.

This change makes the -j parameter apply equally to parsing and background
index. It's not perfect, because the total number of threads is 2x the -j value,
which may still be unexpected. But at least this change allows users to prevent
clangd using all CPU cores.

Reviewers: kadircet, sammccall

Reviewed By: sammccall

Subscribers: javed.absar, jfb, sammccall, ilya-biryukov, MaskRay, jkorous, arphaman, cfe-commits

Tags: #clang

Differential Revision: https://reviews.llvm.org/D66031

llvm-svn: 368498

4 years agoSmall format fix
Haibo Huang [Fri, 9 Aug 2019 22:59:56 +0000 (22:59 +0000)]
Small format fix

Differential Revision: https://reviews.llvm.org/D66034

llvm-svn: 368497

4 years agoDetects whether RESOURCE_TYPE_IO is defined.
Haibo Huang [Fri, 9 Aug 2019 22:47:46 +0000 (22:47 +0000)]
Detects whether RESOURCE_TYPE_IO is defined.

Summary: This fixes lldb build on macOS SDK prior to 10.12.

Reviewers: JDevlieghere

Subscribers: lldb-commits

Tags: #lldb

Differential Revision: https://reviews.llvm.org/D66034

llvm-svn: 368496

4 years agocfi-icall: Allow the jump table to be optionally made non-canonical.
Peter Collingbourne [Fri, 9 Aug 2019 22:31:59 +0000 (22:31 +0000)]
cfi-icall: Allow the jump table to be optionally made non-canonical.

The default behavior of Clang's indirect function call checker will replace
the address of each CFI-checked function in the output file's symbol table
with the address of a jump table entry which will pass CFI checks. We refer
to this as making the jump table `canonical`. This property allows code that
was not compiled with ``-fsanitize=cfi-icall`` to take a CFI-valid address
of a function, but it comes with a couple of caveats that are especially
relevant for users of cross-DSO CFI:

- There is a performance and code size overhead associated with each
  exported function, because each such function must have an associated
  jump table entry, which must be emitted even in the common case where the
  function is never address-taken anywhere in the program, and must be used
  even for direct calls between DSOs, in addition to the PLT overhead.

- There is no good way to take a CFI-valid address of a function written in
  assembly or a language not supported by Clang. The reason is that the code
  generator would need to insert a jump table in order to form a CFI-valid
  address for assembly functions, but there is no way in general for the
  code generator to determine the language of the function. This may be
  possible with LTO in the intra-DSO case, but in the cross-DSO case the only
  information available is the function declaration. One possible solution
  is to add a C wrapper for each assembly function, but these wrappers can
  present a significant maintenance burden for heavy users of assembly in
  addition to adding runtime overhead.

For these reasons, we provide the option of making the jump table non-canonical
with the flag ``-fno-sanitize-cfi-canonical-jump-tables``. When the jump
table is made non-canonical, symbol table entries point directly to the
function body. Any instances of a function's address being taken in C will
be replaced with a jump table address.

This scheme does have its own caveats, however. It does end up breaking
function address equality more aggressively than the default behavior,
especially in cross-DSO mode which normally preserves function address
equality entirely.

Furthermore, it is occasionally necessary for code not compiled with
``-fsanitize=cfi-icall`` to take a function address that is valid
for CFI. For example, this is necessary when a function's address
is taken by assembly code and then called by CFI-checking C code. The
``__attribute__((cfi_jump_table_canonical))`` attribute may be used to make
the jump table entry of a specific function canonical so that the external
code will end up taking a address for the function that will pass CFI checks.

Fixes PR41972.

Differential Revision: https://reviews.llvm.org/D65629

llvm-svn: 368495

4 years agoAdd missing REQUIRES to r368487
Daniel Sanders [Fri, 9 Aug 2019 22:16:16 +0000 (22:16 +0000)]
Add missing REQUIRES to r368487

llvm-svn: 368494

4 years ago[Bugpoint redesign] Fix nonlocal URI link in doc
Diego Trevino Ferrer [Fri, 9 Aug 2019 21:48:47 +0000 (21:48 +0000)]
[Bugpoint redesign] Fix nonlocal URI link in doc

Summary: Fixes documentation bot build  http://lab.llvm.org:8011/builders/llvm-sphinx-docs

Reviewers: JDevlieghere

Subscribers: llvm-commits

Tags: #llvm

Differential Revision: https://reviews.llvm.org/D66022

llvm-svn: 368493

4 years ago[Sanitizer][Darwin] Add interceptor for malloc_zone_from_ptr
Julian Lettner [Fri, 9 Aug 2019 21:46:32 +0000 (21:46 +0000)]
[Sanitizer][Darwin] Add interceptor for malloc_zone_from_ptr

Ensure that malloc_default_zone and malloc_zone_from_ptr return the
sanitizer-installed malloc zone even when MallocStackLogging (MSL) is
requested. This prevents crashes in certain situations. Note that the
sanitizers and MSL cannot be used together. If both are enabled, MSL
functionality is essentially deactivated since it only hooks the default
allocator which is replaced by a custom sanitizer allocator.

rdar://53686175

Reviewed By: kubamracek

Differential Revision: https://reviews.llvm.org/D65990

llvm-svn: 368492

4 years ago[OpenMP] Add support for close map modifier in Clang
Gheorghe-Teodor Bercea [Fri, 9 Aug 2019 21:42:13 +0000 (21:42 +0000)]
[OpenMP] Add support for close map modifier in Clang

Summary:
This patch adds support for the close map modifier in Clang.

This ensures that the new map type is marked and passed to the OpenMP runtime appropriately.

Additional regression tests have been merged from patch D55892 (author @saghir).

Reviewers: ABataev, caomhin, jdoerfert, kkwli0

Reviewed By: ABataev

Subscribers: kkwli0, Hahnfeld, saghir, guansong, cfe-commits

Tags: #clang

Differential Revision: https://reviews.llvm.org/D65341

llvm-svn: 368491

4 years ago[DAGCombiner] exclude x*2.0 from normal negation profitability rules
Sanjay Patel [Fri, 9 Aug 2019 21:37:32 +0000 (21:37 +0000)]
[DAGCombiner] exclude x*2.0 from normal negation profitability rules

This is the codegen part of fixing:
https://bugs.llvm.org/show_bug.cgi?id=32939

Even with the optimal/canonical IR that is ideally created by D65954,
we would reverse that transform in DAGCombiner and end up with the same
asm on AArch64 or x86.

I see 2 options for trying to correct this:

  1. Limit isNegatibleForFree() by special-casing the fmul pattern (this patch).
  2. Avoid creating (fmul X, 2.0) in the 1st place by adding a special-case
     transform to SelectionDAG::getNode() and/or SelectionDAGBuilder::visitFMul()
     that matches the transform done by DAGCombiner.

This seems like the less intrusive patch, but if there's some other reason to
prefer 1 option over the other, we can change to the other option.

Differential Revision: https://reviews.llvm.org/D66016

llvm-svn: 368490

4 years agoRemove leftover MF->dump()'s from r368487 that break release builds
Daniel Sanders [Fri, 9 Aug 2019 21:33:31 +0000 (21:33 +0000)]
Remove leftover MF->dump()'s from r368487 that break release builds

llvm-svn: 368489

4 years ago[OpenMP][libomptarget] Add support for close map modifier
Gheorghe-Teodor Bercea [Fri, 9 Aug 2019 21:32:57 +0000 (21:32 +0000)]
[OpenMP][libomptarget] Add support for close map modifier

Summary:
This patch adds support for the close map modifier.

The close map modifier will overwrite the unified shared memory requirement and create a device copy of the data.

Reviewers: ABataev, Hahnfeld, caomhin, grokos, jdoerfert, AlexEichenberger

Reviewed By: Hahnfeld, AlexEichenberger

Subscribers: guansong, openmp-commits

Tags: #openmp

Differential Revision: https://reviews.llvm.org/D65340

llvm-svn: 368488

4 years ago[globalisel] Add G_SEXT_INREG
Daniel Sanders [Fri, 9 Aug 2019 21:11:20 +0000 (21:11 +0000)]
[globalisel] Add G_SEXT_INREG

Summary:
Targets often have instructions that can sign-extend certain cases faster
than the equivalent shift-left/arithmetic-shift-right. Such cases can be
identified by matching a shift-left/shift-right pair but there are some
issues with this in the context of combines. For example, suppose you can
sign-extend 8-bit up to 32-bit with a target extend instruction.
  %1:_(s32) = G_SHL %0:_(s32), i32 24 # (I've inlined the G_CONSTANT for brevity)
  %2:_(s32) = G_ASHR %1:_(s32), i32 24
  %3:_(s32) = G_ASHR %2:_(s32), i32 1
would reasonably combine to:
  %1:_(s32) = G_SHL %0:_(s32), i32 24
  %2:_(s32) = G_ASHR %1:_(s32), i32 25
which no longer matches the special case. If your shifts and extend are
equal cost, this would break even as a pair of shifts but if your shift is
more expensive than the extend then it's cheaper as:
  %2:_(s32) = G_SEXT_INREG %0:_(s32), i32 8
  %3:_(s32) = G_ASHR %2:_(s32), i32 1
It's possible to match the shift-pair in ISel and emit an extend and ashr.
However, this is far from the only way to break this shift pair and make
it hard to match the extends. Another example is that with the right
known-zeros, this:
  %1:_(s32) = G_SHL %0:_(s32), i32 24
  %2:_(s32) = G_ASHR %1:_(s32), i32 24
  %3:_(s32) = G_MUL %2:_(s32), i32 2
can become:
  %1:_(s32) = G_SHL %0:_(s32), i32 24
  %2:_(s32) = G_ASHR %1:_(s32), i32 23

All upstream targets have been configured to lower it to the current
G_SHL,G_ASHR pair but will likely want to make it legal in some cases to
handle their faster cases.

To follow-up: Provide a way to legalize based on the constant. At the
moment, I'm thinking that the best way to achieve this is to provide the
MI in LegalityQuery but that opens the door to breaking core principles
of the legalizer (legality is not context sensitive). That said, it's
worth noting that looking at other instructions and acting on that
information doesn't violate this principle in itself. It's only a
violation if, at the end of legalization, a pass that checks legality
without being able to see the context would say an instruction might not be
legal. That's a fairly subtle distinction so to give a concrete example,
saying %2 in:
  %1 = G_CONSTANT 16
  %2 = G_SEXT_INREG %0, %1
is legal is in violation of that principle if the legality of %2 depends
on %1 being constant and/or being 16. However, legalizing to either:
  %2 = G_SEXT_INREG %0, 16
or:
  %1 = G_CONSTANT 16
  %2:_(s32) = G_SHL %0, %1
  %3:_(s32) = G_ASHR %2, %1
depending on whether %1 is constant and 16 does not violate that principle
since both outputs are genuinely legal.

Reviewers: bogner, aditya_nandakumar, volkan, aemerson, paquette, arsenm

Subscribers: sdardis, jvesely, wdng, nhaehnle, rovka, kristof.beyls, javed.absar, hiraditya, jrtc27, atanasyan, Petar.Avramovic, llvm-commits

Tags: #llvm

Differential Revision: https://reviews.llvm.org/D61289

llvm-svn: 368487