platform/upstream/llvm.git
6 years ago[MachineOutliner] Don't save/restore LR for tail calls.
Eli Friedman [Wed, 16 May 2018 19:49:01 +0000 (19:49 +0000)]
[MachineOutliner] Don't save/restore LR for tail calls.

The cost computation assumes we do this correctly, but the actual
lowering was wrong.

Differential Revision: https://reviews.llvm.org/D46923

llvm-svn: 332514

6 years ago[OR1K] Add the EPCR special-purpose register to register state.
whitequark [Wed, 16 May 2018 19:09:48 +0000 (19:09 +0000)]
[OR1K] Add the EPCR special-purpose register to register state.

This makes it possible to unwind hardware exception stack frames,
which necessarily save every register and so need an extra column
for storing the return address. CFI for the exception handler could
then look as follows:

.globl exception_vector
exception_vector:
    .cfi_startproc
    .cfi_signal_frame
    .cfi_return_column 32
    l.addi  r1, r1, -0x100
    .cfi_def_cfa_offset 0x100
    l.sw    0x00(r1), r2
    .cfi_offset 2, 0x00-0x100
    l.sw    0x04(r1), r3
    .cfi_offset 3, 0x04-0x100
    l.sw    0x08(r1), r4
    .cfi_offset 4, 0x08-0x100
    l.mfspr r3, r0, SPR_EPCR_BASE
    l.sw    0x78(r1), r3
    .cfi_offset 32, 0x78-0x100
    l.jal   exception_handler
     l.nop
    l.lwz   r2, 0x00(r1)
    l.lwz   r3, 0x04(r1)
    l.lwz   r4, 0x08(r1)
    l.jr    r9
     l.nop
    .cfi_endproc

This register could, of course, also be accessed by the trace
callback or personality function, if so desired.

llvm-svn: 332513

6 years ago[OR1K] Add a dedicated PC register to register state.
whitequark [Wed, 16 May 2018 19:09:41 +0000 (19:09 +0000)]
[OR1K] Add a dedicated PC register to register state.

Before this commit, R9, the link register, was used as PC register.
However, a stack frame may have R9 not set to PC on entry, either
because it uses a custom calling convention, or, more likely,
because this is a signal or exception stack frame. Using R9 as
PC register made it impossible to unwind such frames.

All other architectures similarly use a dedicated PC register.

llvm-svn: 332512

6 years agoFix FileSpecTest after LLVM changes to remove_dots (https://reviews.llvm.org/D46887)
Greg Clayton [Wed, 16 May 2018 18:37:00 +0000 (18:37 +0000)]
Fix FileSpecTest after LLVM changes to remove_dots (https://reviews.llvm.org/D46887)

llvm-svn: 332511

6 years ago[X86] Fix typo in instregex for CVTSI642SDrr
Simon Pilgrim [Wed, 16 May 2018 18:31:17 +0000 (18:31 +0000)]
[X86] Fix typo in instregex for CVTSI642SDrr

llvm-svn: 332510

6 years ago[Sema] Fix assertion when constructor is disabled with partially specialized template.
Volodymyr Sapsai [Wed, 16 May 2018 18:28:58 +0000 (18:28 +0000)]
[Sema] Fix assertion when constructor is disabled with partially specialized template.

The added test case was triggering assertion

> Assertion failed: (!SpecializedTemplate.is<SpecializedPartialSpecialization*>() && "Already set to a class template partial specialization!"), function setInstantiationOf, file clang/include/clang/AST/DeclTemplate.h, line 1825.

It was happening with ClassTemplateSpecializationDecl
`enable_if_not_same<int, int>`. Because this template is specialized for
equal types not to have a definition, it wasn't instantiated and its
specialization kind remained TSK_Undeclared. And because it was implicit
instantiation, we didn't mark the decl as invalid. So when we try to
find the best matching partial specialization the second time, we hit
the assertion as partial specialization is already set.

Fix by reusing stored partial specialization when available, instead of
looking for the best match every time.

rdar://problem/39524996

Reviewers: rsmith, arphaman

Reviewed By: rsmith

Subscribers: cfe-commits

Differential Revision: https://reviews.llvm.org/D46909

llvm-svn: 332509

6 years agoFix llvm::sys::path::remove_dots() to return "." instead of an empty path.
Greg Clayton [Wed, 16 May 2018 18:25:51 +0000 (18:25 +0000)]
Fix llvm::sys::path::remove_dots() to return "." instead of an empty path.

Differential Revision: https://reviews.llvm.org/D46887

llvm-svn: 332508

6 years ago[libFuzzer] add a symbolic execution puzzle (difficult for today's libFuzzer).
Max Moroz [Wed, 16 May 2018 18:19:30 +0000 (18:19 +0000)]
[libFuzzer] add a symbolic execution puzzle (difficult for today's libFuzzer).

Summary:
This can be solved just in seconds with KLEE. Current libFuzzer
is able to satistfy 101 constraints out of 410 constraints presented during
the first hour of running with -use_value_profile=1 and -max_len=20.
During the next 3 hours, libFuzzer is able to generate ~50 NEW inputs,
bot none of those solve any new constraint.
During the next 20 hours, it didn't find any NEW inputs.

This test might be interesting for experimenting with the data flow tracing
approach started in https://reviews.llvm.org/D46666.

For the solution with KLEE and other information, see
https://github.com/Dor1s/codegate2017-quals-angrybird

Reviewers: kcc

Reviewed By: kcc

Subscribers: delcypher, llvm-commits, #sanitizers

Differential Revision: https://reviews.llvm.org/D46924

llvm-svn: 332507

6 years ago[Timers] TimerGroup: add constructor from StringMap<TimeRecord>
Roman Lebedev [Wed, 16 May 2018 18:16:01 +0000 (18:16 +0000)]
[Timers] TimerGroup: add constructor from StringMap<TimeRecord>

Summary:
This is needed for the continuation of D46504,
to be able to store the timings.

Reviewers: george.karpenkov, NoQ, alexfh, sbenza

Reviewed By: alexfh

Subscribers: llvm-commits, cfe-commits

Differential Revision: https://reviews.llvm.org/D46939

llvm-svn: 332506

6 years ago[Timers] TimerGroup: make printJSONValues() method public
Roman Lebedev [Wed, 16 May 2018 18:15:56 +0000 (18:15 +0000)]
[Timers] TimerGroup: make printJSONValues() method public

Summary:
This is needed for the continuation of D46504,
to be able to store the timings.

Reviewers: george.karpenkov, NoQ, alexfh, sbenza

Reviewed By: alexfh

Subscribers: llvm-commits, cfe-commits

Differential Revision: https://reviews.llvm.org/D46938

llvm-svn: 332505

6 years ago[Timers] TimerGroup::printJSONValue(): print doubles with no precision loss
Roman Lebedev [Wed, 16 May 2018 18:15:51 +0000 (18:15 +0000)]
[Timers] TimerGroup::printJSONValue(): print doubles with no precision loss

Summary:
Although this is not stricly required, i would very much prefer
not to have known random precision losses along the way.

Reviewers: george.karpenkov, NoQ, alexfh, sbenza

Reviewed By: george.karpenkov

Subscribers: llvm-commits, cfe-commits

Differential Revision: https://reviews.llvm.org/D46937

llvm-svn: 332504

6 years ago[Timers] TimerGroup::printJSONValues(): print mem timer with .mem suffix
Roman Lebedev [Wed, 16 May 2018 18:15:47 +0000 (18:15 +0000)]
[Timers] TimerGroup::printJSONValues(): print mem timer with .mem suffix

Summary: We have just used `.sys` suffix for the previous timer, this is clearly a typo

Reviewers: george.karpenkov, NoQ, alexfh, sbenza

Reviewed By: alexfh

Subscribers: llvm-commits, cfe-commits

Differential Revision: https://reviews.llvm.org/D46936

llvm-svn: 332503

6 years ago[scudo] Quarantine optimization
Kostya Kortchinsky [Wed, 16 May 2018 18:12:31 +0000 (18:12 +0000)]
[scudo] Quarantine optimization

Summary:
It turns out that the previous code construct was not optimizing the allocation
and deallocation of batches. The class id was read as a class member (even
though a precomputed one) and nothing else was optimized. By changing the
construct this way, the compiler actually optimizes most of the allocation and
deallocation away to only work with a single class id, which not only saves some
CPU but also some code footprint.

Reviewers: alekseyshl, dvyukov

Reviewed By: dvyukov

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

Differential Revision: https://reviews.llvm.org/D46961

llvm-svn: 332502

6 years ago[x86] preserve test intent by removing undef
Sanjay Patel [Wed, 16 May 2018 17:58:50 +0000 (17:58 +0000)]
[x86] preserve test intent by removing undef

We need to clean up the DAG floating-point undef logic.
This process is similar to how we handled integer undef
logic in D43141.

And as we did there, I'm trying to reduce the patch by
changing tests that would probably become meaningless
once we make those fixes.

llvm-svn: 332501

6 years ago[x86] preserve test intent by removing undef
Sanjay Patel [Wed, 16 May 2018 17:58:08 +0000 (17:58 +0000)]
[x86] preserve test intent by removing undef

We need to clean up the DAG floating-point undef logic.
This process is similar to how we handled integer undef
logic in D43141.

And as we did there, I'm trying to reduce the patch by
changing tests that would probably become meaningless
once we make those fixes.

llvm-svn: 332500

6 years ago[x86] preserve test intent by removing undef
Sanjay Patel [Wed, 16 May 2018 17:57:35 +0000 (17:57 +0000)]
[x86] preserve test intent by removing undef

We need to clean up the DAG floating-point undef logic.
This process is similar to how we handled integer undef
logic in D43141.

And as we did there, I'm trying to reduce the patch by
changing tests that would probably become meaningless
once we make those fixes.

llvm-svn: 332499

6 years ago[X86][AVX512DQ] Use packed instructions for scalar FP<->i64 conversions on 32-bit...
Craig Topper [Wed, 16 May 2018 17:40:07 +0000 (17:40 +0000)]
[X86][AVX512DQ] Use packed instructions for scalar FP<->i64 conversions on 32-bit targets

As i64 types are not legal on 32-bit targets, insert these into a suitable zero vector and use the packed vXi64<->FP conversion instructions instead.

Fixes PR3163.

Differential Revision: https://reviews.llvm.org/D43441

llvm-svn: 332498

6 years ago[Debugify] Tighten up the test for -debugify-each, NFC
Vedant Kumar [Wed, 16 May 2018 17:30:58 +0000 (17:30 +0000)]
[Debugify] Tighten up the test for -debugify-each, NFC

In post-commit review for r332416, Paul Robinson pointed out that the
test for -debugify-each is not checking what it needs to.

This commit tightens up the test.

llvm-svn: 332497

6 years agoSignal handling should be signal-safe
JF Bastien [Wed, 16 May 2018 17:25:35 +0000 (17:25 +0000)]
Signal handling should be signal-safe

Summary:
Before this patch, signal handling wasn't signal safe. This leads to real-world
crashes. It used ManagedStatic inside of signals, this can allocate and can lead
to unexpected state when a signal occurs during llvm_shutdown (because
llvm_shutdown destroys the ManagedStatic). It also used cl::opt without custom
backing storage. Some de-allocation was performed as well. Acquiring a lock in a
signal handler is also a great way to deadlock.

We can't just disable signals on llvm_shutdown because the signals might do
useful work during that shutdown. We also can't just disable llvm_shutdown for
programs (instead of library uses of clang) because we'd have to then mark the
pointers as not leaked and make sure all the ManagedStatic uses are OK to leak
and remain so.

Move all of the code to lock-free datastructures instead, and avoid having any
of them in an inconsistent state. I'm not trying to be fancy, I'm not using any
explicit memory order because this code isn't hot. The only purpose of the
atomics is to guarantee that a signal firing on the same or a different thread
doesn't see an inconsistent state and crash. In some cases we might miss some
state (for example, we might fail to delete a temporary file), but that's fine.

Note that I haven't touched any of the backtrace support despite it not
technically being totally signal-safe. When that code is called we know
something bad is up and we don't expect to continue execution, so calling
something that e.g. sets errno is the least of our problems.

A similar patch should be applied to lib/Support/Windows/Signals.inc, but that
can be done separately.

Fix r332428 which I reverted in r332429. I originally used double-wide CAS
because I was lazy, but some platforms use a runtime function for that which
thankfully failed to link (it would have been bad for signal handlers
otherwise). I use a separate flag to guard the data instead.

<rdar://problem/28010281>

Reviewers: dexonsmith

Subscribers: steven_wu, llvm-commits
llvm-svn: 332496

6 years ago[libomptarget-nvptx-bc] Pass found CUDA installations
Jonas Hahnfeld [Wed, 16 May 2018 17:20:27 +0000 (17:20 +0000)]
[libomptarget-nvptx-bc] Pass found CUDA installations

We already know where the CUDA SDK is, so there is no point in
letting Clang search for it again and possibly finding no or
a different installation.

--cuda-path is supported since the beginning of CUDA support in
Clang, so making this required doesn't impose additional restrictions.

Differential Revision: https://reviews.llvm.org/D46930

llvm-svn: 332495

6 years ago[libomptarget-nvptx] Test bitcode compiler flags and enable by default
Jonas Hahnfeld [Wed, 16 May 2018 17:20:21 +0000 (17:20 +0000)]
[libomptarget-nvptx] Test bitcode compiler flags and enable by default

Move all logic related to selecting the bitcode compiler and linker
into a new file and dynamically test required compiler flags. This
also adds -fcuda-rdc for Clang trunk as previously attempted in D44992
which fixes the build.

As a result this change also enables building the library by default
if all prerequisites are met.

Differential Revision: https://reviews.llvm.org/D46901

llvm-svn: 332494

6 years ago[llvm-mca] Move the RegisterFile class into its own translation unit. NFC
Matt Davis [Wed, 16 May 2018 17:07:08 +0000 (17:07 +0000)]
[llvm-mca] Move the RegisterFile class into its own translation unit. NFC

Summary: This change will help us turn the DispatchUnit into its own stage.

Reviewers: andreadb, RKSimon, courbet

Reviewed By: andreadb, courbet

Subscribers: mgorny, tschuett, gbedwell, llvm-commits

Differential Revision: https://reviews.llvm.org/D46916

llvm-svn: 332493

6 years agoAdd lit tests forgotten for R332470
Erich Keane [Wed, 16 May 2018 17:04:47 +0000 (17:04 +0000)]
Add lit tests forgotten for R332470

I forgot to svn-add the lit tests for R332470.
Added here!

llvm-svn: 332492

6 years ago[Modules] Do not diagnose missing import in recovery mode if there isn't a decl to...
Bruno Cardoso Lopes [Wed, 16 May 2018 17:00:24 +0000 (17:00 +0000)]
[Modules] Do not diagnose missing import in recovery mode if there isn't a decl to lookup

Clang often tries to create implicit module import for error recovery,
which does a great job helping out with diagnostics. However, sometimes
clang does not have enough information given that it's using an invalid
context to move on. Be more strict in those cases to avoid crashes.

We hit crash on invalids because of this but unfortunately there are no
testcases and I couldn't manage to create one. The crashtrace however
indicates pretty clear why it's happening.

rdar://problem/39313933

llvm-svn: 332491

6 years ago[DAG] Prune cycle check in store merge.
Nirav Dave [Wed, 16 May 2018 16:48:20 +0000 (16:48 +0000)]
[DAG] Prune cycle check in store merge.

As part of merging stores we check that fusing the nodes does not
cause a cycle due to one candidate store being indirectly dependent on
another store (this may happen via chained memory copies). This is
done by searching if a store is a predecessor to another store's
value.

Prune the search at the candidate search's root node which is a
predecessor to all candidate stores. This reduces the
size of the subgraph searched in large basic blocks.

Reviewers: jyknight

Subscribers: llvm-commits, hiraditya

Differential Revision: https://reviews.llvm.org/D46955

llvm-svn: 332490

6 years ago[DAG] Defer merge store cycle checking to just before merge. NFCI.
Nirav Dave [Wed, 16 May 2018 16:47:54 +0000 (16:47 +0000)]
[DAG] Defer merge store cycle checking to just before merge. NFCI.

llvm-svn: 332489

6 years ago[DeLICM] Avoid assertion on out-of-quota.
Michael Kruse [Wed, 16 May 2018 16:39:51 +0000 (16:39 +0000)]
[DeLICM] Avoid assertion on out-of-quota.

An assertion was not prepared to be passed a nullptr because the
out-of-quota limit was exceeded.  Bail-out before the assertion
since the assertion does not apply on out-of-quote.

This fixes llvm.org/PR37477.

llvm-svn: 332488

6 years agoGive shared modules in unittests the platform-native extension, make PipSqueak a...
Nico Weber [Wed, 16 May 2018 16:29:05 +0000 (16:29 +0000)]
Give shared modules in unittests the platform-native extension, make PipSqueak a MODULE

As far as I can tell from revision history, there's no good reason to call
these files .so instead of .dll in Windows, so use the normal extension.

Also change PipSquak from SHARED to MODULE -- it's never passed to
target_link_libraries() and only loaded via dlopen(), so MODULE is more
appropriate. This makes it possible to delete a workaround for SHARED ldflags
being not quite right as well.

No intended behavior change.
https://reviews.llvm.org/D46898

llvm-svn: 332487

6 years ago[x86] add run with unsafe global param; NFC
Sanjay Patel [Wed, 16 May 2018 16:23:41 +0000 (16:23 +0000)]
[x86] add run with unsafe global param; NFC

llvm-svn: 332486

6 years ago[AMDGPU] Change llvm.debugtrap to be a debug breakpoint that can resume execution.
Tony Tye [Wed, 16 May 2018 16:19:34 +0000 (16:19 +0000)]
[AMDGPU] Change llvm.debugtrap to be a debug breakpoint that can resume execution.

No longer require the queue pointer to be passed in in fixed SGPRs.

Differential Revision: https://reviews.llvm.org/D46769

llvm-svn: 332485

6 years ago[x86] add tests for DAG FP undef operands; NFC
Sanjay Patel [Wed, 16 May 2018 16:16:48 +0000 (16:16 +0000)]
[x86] add tests for DAG FP undef operands; NFC

llvm-svn: 332484

6 years ago[AArch64][SVE] Improve diagnostics for vectors with incorrect element-size.
Sander de Smalen [Wed, 16 May 2018 15:45:17 +0000 (15:45 +0000)]
[AArch64][SVE] Improve diagnostics for vectors with incorrect element-size.

For regular SVE vector operands, this patch introduces a more
sensible diagnostic when the vector has a wrong suffix (e.g. z0.s vs z0.b).

For example:
  add z0.s, z1.s, z2.b      -> invalid element width
               ^_____^
               mismatch

For the vector-with-shift/extend (e.g. z0.s, uxtw #2) this patch takes
a slightly different approach and instead returns a 'invalid operand'
if the element size is not as expected. This is because the diagnostics
are more specificied to suggest using the right shift/extend suffix. This
is a trade-off not to introduce more operand classes and still provide
useful diagnostics for LD1 and PRF instructions.

For example:
  ld1w z1.s, p0/z, [x0, z0.s] -> invalid shift/extend specified, expected 'z[0..31].s, (uxtw|sxtw)'
  ld1w z1.d, p0/z, [x0, z0.s] -> invalid operand
          ^________________^
               mismatch

For gather prefetches, both 'z0.s' and 'z0.d' would be allowed:
  prfw #0, p0, [x0, z0.s]   -> invalid shift/extend specified, expected 'z[0..31].s, (uxtw|sxtw) #2'
  prfw #0, p0, [x0, z0.d]   -> invalid shift/extend specified, expected 'z[0..31].d, (lsl|uxtw|sxtw) #2'

Without this change, the diagnostic would unnecessarily suggest a
different element size:
  prfw #0, p0, [x0, z0.s]   -> invalid shift/extend specified, expected 'z[0..31].d, (lsl|uxtw|sxtw) #2'

Reviewers: SjoerdMeijer, aemerson, fhahn, samparker, javed.absar

Reviewed By: SjoerdMeijer

Differential Revision: https://reviews.llvm.org/D46688

llvm-svn: 332483

6 years ago[AArch64] Gangup loads and stores for pairing.
Sirish Pande [Wed, 16 May 2018 15:36:52 +0000 (15:36 +0000)]
[AArch64] Gangup loads and stores for pairing.

Keep loads and stores together (target defines how many loads
and stores to gang up), such that it will help in pairing
and vectorization.

Differential Revision https://reviews.llvm.org/D46477

llvm-svn: 332482

6 years ago[Attr] Don't print fake MSInheritance argument
Joel E. Denny [Wed, 16 May 2018 15:18:30 +0000 (15:18 +0000)]
[Attr] Don't print fake MSInheritance argument

This was discovered at:

http://lists.llvm.org/pipermail/cfe-commits/Week-of-Mon-20180514/228390.html

Reviewed by: aaron.ballman

Differential Revision: https://reviews.llvm.org/D46905

llvm-svn: 332481

6 years agoRevert r332474: [Attr] Don't print fake MSInheritance argument
Joel E. Denny [Wed, 16 May 2018 15:18:27 +0000 (15:18 +0000)]
Revert r332474: [Attr] Don't print fake MSInheritance argument

I botched the commit log attributes.

llvm-svn: 332480

6 years ago[InstCombine] allow more binop (shuffle X), C transforms
Sanjay Patel [Wed, 16 May 2018 15:15:22 +0000 (15:15 +0000)]
[InstCombine] allow more binop (shuffle X), C transforms

The canonicalization was restricted to shuffle masks with
a 1-to-1 mapping to the constant vector, but that disqualifies
the common splat pattern. This is part of solving PR37463:
https://bugs.llvm.org/show_bug.cgi?id=37463

llvm-svn: 332479

6 years ago[sanitizer] Minor 32-bit primary improvements
Kostya Kortchinsky [Wed, 16 May 2018 15:13:26 +0000 (15:13 +0000)]
[sanitizer] Minor 32-bit primary improvements

Summary:
For the 32-bit TransferBatch:
- `SetFromArray` callers have bounds `count`, so relax the `CHECK` to `DCHECK`;
- same for `Add`;
- mark `CopyToArray` as `const`;
For the 32-bit Primary:
- `{Dea,A}llocateBatch` are only called from places that check `class_id`,
  relax the `CHECK` to `DCHECK`;
- same for `AllocateRegion`;
- remove `GetRegionBeginBySizeClass` that is not used;
- use a local variable for the random shuffle state, so that the compiler can
  use a register instead of reading and writing to the `SizeClassInfo` at every
  iteration;
For the 32-bit local cache:
- pass the count to drain instead of doing a `Min` everytime which is at times
  superfluous.

Reviewers: alekseyshl

Reviewed By: alekseyshl

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

Differential Revision: https://reviews.llvm.org/D46657

llvm-svn: 332478

6 years ago[OPENMP] DO not crash on combined constructs in declare target
Alexey Bataev [Wed, 16 May 2018 15:08:32 +0000 (15:08 +0000)]
[OPENMP] DO not crash on combined constructs in declare target
functions.

If the combined construct is specified in the declare target function
and the device code is emitted, the compiler crashes because of the
incorrectly chosen captured stmt. We should choose the innermost
captured statement, not the outermost.

llvm-svn: 332477

6 years ago[ThinLTO] Make llvm-lto module ID numbering consistent with linkers
Teresa Johnson [Wed, 16 May 2018 14:58:14 +0000 (14:58 +0000)]
[ThinLTO] Make llvm-lto module ID numbering consistent with linkers

The module ID numbering typically starts at 0 (in both the new and old
LTO APIs, used by linkers). Make llvm-lto consistent with that.

Split out of D46699.

llvm-svn: 332476

6 years ago[ThinLTO] Add const qualifier to a couple of flag getter methods
Teresa Johnson [Wed, 16 May 2018 14:56:02 +0000 (14:56 +0000)]
[ThinLTO] Add const qualifier to a couple of flag getter methods

Split these minor fixes out of D46699.

llvm-svn: 332475

6 years ago[Attr] Don't print fake MSInheritance argument
Joel E. Denny [Wed, 16 May 2018 14:51:18 +0000 (14:51 +0000)]
[Attr] Don't print fake MSInheritance argument

This was discovered at:

http://lists.llvm.org/pipermail/cfe-commits/Week-of-Mon-20180514/228390.html

Reviewed by: aaron.ballman

https://reviews.llvm.org/D46905

llvm-svn: 332474

6 years ago[OpenCL] make test independent of optimizer
Sanjay Patel [Wed, 16 May 2018 14:38:07 +0000 (14:38 +0000)]
[OpenCL] make test independent of optimizer

There shouldn't be any tests that run the entire optimizer here,
but the last test in this file is definitely going to break with
a change in LLVM IR canonicalization. Change that part to check
the unoptimized IR because that's the real intent of this file.

llvm-svn: 332473

6 years ago[AArch64][SVE] Asm: Support for gather PRF prefetch instructions
Sander de Smalen [Wed, 16 May 2018 14:16:01 +0000 (14:16 +0000)]
[AArch64][SVE] Asm: Support for gather PRF prefetch instructions

Reviewers: rengolin, fhahn, samparker, SjoerdMeijer, javed.absar

Reviewed By: SjoerdMeijer

Differential Revision: https://reviews.llvm.org/D46686

llvm-svn: 332472

6 years ago[ScopInfo] Remove usage of isl_set_n_basic_set()
Philip Pfaffe [Wed, 16 May 2018 14:05:03 +0000 (14:05 +0000)]
[ScopInfo] Remove usage of isl_set_n_basic_set()

Summary: This patch aims to remove the usage of old C-styled isl functions (in this case `isl_set_n_basic_set()`) in favor of new C++ isl interface based methods in `ScopInfo.cpp`.

Patch by Sahil Yerawar

Differential Revision: https://reviews.llvm.org/D46935

llvm-svn: 332471

6 years agoAdd support for __declspec(code_seg("segname"))
Erich Keane [Wed, 16 May 2018 13:57:17 +0000 (13:57 +0000)]
Add support for __declspec(code_seg("segname"))

Add support for __declspec(code_seg("segname"))

This patch is built on the existing support for #pragma code_seg. The code_seg
declspec is allowed on functions and classes. The attribute enables the
placement of code into separate named segments, including compiler-generated
members and template instantiations.

For more information, please see the following:
https://msdn.microsoft.com/en-us/library/dn636922.aspx

A new CodeSeg attribute is used instead of adding a new spelling to the existing
Section attribute since they don’t apply to the same Subjects. Section
attributes are also added for the code_seg declspec since they are used for
#pragma code_seg. No CodeSeg attributes are added to the AST.

The patch is written to match with the Microsoft compiler’s behavior even where
that behavior is a little complicated (see https://reviews.llvm.org/D22931, the
Microsoft feedback page is no longer available since MS has removed the page).
That code is in getImplicitSectionAttrFromClass routine.

Diagnostics messages are added to match with the Microsoft compiler for code-seg
attribute mismatches on base and derived classes and virtual overrides.

Differential Revision: https://reviews.llvm.org/D43352

llvm-svn: 332470

6 years ago[Frontend] Avoid running plugins during code completion parse
Ivan Donchevskii [Wed, 16 May 2018 13:50:05 +0000 (13:50 +0000)]
[Frontend] Avoid running plugins during code completion parse

The parsing that is done for code completion is a special case that will
discard any generated diagnostics, so avoid running plugins for this
case in the first place to avoid performance penalties due to the
plugins.

A scenario for this is for example libclang with extra plugins like tidy.

Patch by Nikolai Kosjar

Differential Revision: https://reviews.llvm.org/D46050

llvm-svn: 332469

6 years ago[llvm-mca] Move definitions in FetchStage.cpp inside namespace mca. NFC
Andrea Di Biagio [Wed, 16 May 2018 13:38:17 +0000 (13:38 +0000)]
[llvm-mca] Move definitions in FetchStage.cpp inside namespace mca. NFC

Also, get rid of a redundant include in FetchStage.h and FetchStage.cpp.

llvm-svn: 332468

6 years ago[OPENMP, NVPTX] Add check for SPMD mode in orphaned parallel directives.
Alexey Bataev [Wed, 16 May 2018 13:36:30 +0000 (13:36 +0000)]
[OPENMP, NVPTX] Add check for SPMD mode in orphaned parallel directives.

If the orphaned directive is executed in SPMD mode, we need to emit the
check for the SPMD mode and run the orphaned parallel directive in
sequential mode.

llvm-svn: 332467

6 years ago[BasicAA] Fix handling of invariant group launders
Krzysztof Pszeniczny [Wed, 16 May 2018 13:16:54 +0000 (13:16 +0000)]
[BasicAA] Fix handling of invariant group launders

Summary:
A recent patch ([[ https://reviews.llvm.org/rL331587 | rL331587 ]]) to Capture Tracking taught it that the `launder_invariant_group` intrinsic captures its argument only by returning it. Unfortunately, BasicAA still considered every call instruction as a possible escape source and hence concluded that the result of a `launder_invariant_group` call cannot alias any local non-escaping value. This led to [[ https://bugs.llvm.org/show_bug.cgi?id=37458 | bug 37458 ]].

This patch updates the relevant check for escape sources in BasicAA.

Reviewers: Prazek, kuhar, rsmith, hfinkel, sanjoy, xbolva00

Reviewed By: hfinkel, xbolva00

Subscribers: JDevlieghere, hiraditya, llvm-commits

Differential Revision: https://reviews.llvm.org/D46900

llvm-svn: 332466

6 years agoFix an Index test caused by a clang-format change (r332436).
Eric Liu [Wed, 16 May 2018 12:58:13 +0000 (12:58 +0000)]
Fix an Index test caused by a clang-format change (r332436).

llvm-svn: 332465

6 years ago[mips] Simplify some of the predicate scopes for (negative) multiply add/sub instruct...
Simon Dardis [Wed, 16 May 2018 12:44:27 +0000 (12:44 +0000)]
[mips] Simplify some of the predicate scopes for (negative) multiply add/sub instructions (NFCI)

llvm-svn: 332464

6 years ago[analyzer] Improve the modeling of memset().
Henry Wong [Wed, 16 May 2018 12:37:53 +0000 (12:37 +0000)]
[analyzer] Improve the modeling of memset().

Since there is no perfect way bind the non-zero value with the default binding, this patch only considers the case where buffer's offset is zero and the char value is 0. And according to the value for overwriting, decide how to update the string length.

Reviewers: dcoughlin, NoQ, xazax.hun, a.sidorin, george.karpenkov

Reviewed By: NoQ

Differential Revision: https://reviews.llvm.org/D44934

llvm-svn: 332463

6 years ago[mips] Join existing scopes for DecoderNamespace (NFCI)
Simon Dardis [Wed, 16 May 2018 12:37:04 +0000 (12:37 +0000)]
[mips] Join existing scopes for DecoderNamespace (NFCI)

llvm-svn: 332462

6 years ago[llvm-mca] Fix perf regression after r332390.
Andrea Di Biagio [Wed, 16 May 2018 12:33:09 +0000 (12:33 +0000)]
[llvm-mca] Fix perf regression after r332390.

Revision 332390 introduced a FetchStage class in llvm-mca.
By design, FetchStage owns all the instructions in-flight in the OoO Backend.

Before this change, new instructions were added to a DenseMap indexed by
instruction id. The problem with using a DenseMap is that elements are not
ordered by key. This was causing a massive slow down in method
FetchStage::postExecute(), which searches for instructions retired that can be
deleted.

This patch replaces the DenseMap with a std::map ordered by instruction index.
At the end of every cycle, we search for the first instruction which is not
marked as "retired", and we remove all the previous instructions before it.
This works well because instructions are retired in-order.

Before this patch, a debug build of llvm-mca (on my Ryzen linux machine) took
~8.0 seconds to simulate 3000 iterations of a x86 dot-product (a `vmulps,
vpermilps, vaddps, vpermilps, vaddps` sequence). With this patch, it now takes
~0.8s to run all the 3000 iterations.

llvm-svn: 332461

6 years ago[clangd] Parse all comments in Sema and completion.
Ilya Biryukov [Wed, 16 May 2018 12:32:49 +0000 (12:32 +0000)]
[clangd] Parse all comments in Sema and completion.

Summary:
And add tests for the comment extraction code.

clangd will now show non-doxygen comments in completion for results
coming from Sema and Dynamic index.
Static index does not include the comments yet, I will enable it in
a separate commit after investigating which implications it has for
the size of the index.

Reviewers: sammccall, hokein, ioeric

Reviewed By: sammccall

Subscribers: klimek, MaskRay, jkorous, cfe-commits

Differential Revision: https://reviews.llvm.org/D46002

llvm-svn: 332460

6 years ago[clangd] Retrieve minimally formatted comment text in completion.
Ilya Biryukov [Wed, 16 May 2018 12:32:44 +0000 (12:32 +0000)]
[clangd] Retrieve minimally formatted comment text in completion.

Summary:
Previous implementation used to extract brief text from doxygen comments.
Brief text parsing slows down completion and is not suited for
non-doxygen comments.

This commit switches to providing comments that mimic the ones
originally written in the source code, doing minimal reindenting and
removing the comments markers to make the output more user-friendly.

It means we lose support for doxygen-specific features, e.g. extracting
brief text, but provide useful results for non-doxygen comments.
Switching the doxygen support back is an option, but I suggest to see
whether the current approach gives more useful results.

Reviewers: sammccall, hokein, ioeric

Reviewed By: sammccall

Subscribers: klimek, MaskRay, jkorous, cfe-commits

Differential Revision: https://reviews.llvm.org/D45999

llvm-svn: 332459

6 years ago[AST] Added a helper to extract a user-friendly text of a comment.
Ilya Biryukov [Wed, 16 May 2018 12:30:09 +0000 (12:30 +0000)]
[AST] Added a helper to extract a user-friendly text of a comment.

Summary:
The helper is used in clangd for documentation shown in code completion
and storing the docs in the symbols. See D45999.

This patch reuses the code of the Doxygen comment lexer, disabling the
bits that do command and html tag parsing.
The new helper works on all comments, including non-doxygen comments.
However, it does not understand or transform any doxygen directives,
i.e. cannot extract brief text, etc.

Reviewers: sammccall, hokein, ioeric

Reviewed By: ioeric

Subscribers: mgorny, cfe-commits

Differential Revision: https://reviews.llvm.org/D46000

llvm-svn: 332458

6 years ago[CodeComplete] Expose helpers to get RawComment of completion result.
Ilya Biryukov [Wed, 16 May 2018 12:30:01 +0000 (12:30 +0000)]
[CodeComplete] Expose helpers to get RawComment of completion result.

Summary: Used in clangd, see D45999.

Reviewers: sammccall, hokein, ioeric, arphaman

Reviewed By: sammccall

Subscribers: arphaman, cfe-commits

Differential Revision: https://reviews.llvm.org/D46001

llvm-svn: 332457

6 years ago[clangd] Filter out private proto symbols in SymbolCollector.
Eric Liu [Wed, 16 May 2018 12:12:30 +0000 (12:12 +0000)]
[clangd] Filter out private proto symbols in SymbolCollector.

Summary:
This uses heuristics to identify private proto symbols. For example,
top-level symbols whose name contains "_" are considered private. These symbols
are not expected to be used by users.

Reviewers: ilya-biryukov, malaperle

Reviewed By: ilya-biryukov

Subscribers: sammccall, klimek, MaskRay, jkorous, cfe-commits

Differential Revision: https://reviews.llvm.org/D46751

llvm-svn: 332456

6 years ago[llvm-exegesis] Fix unused variable warning in release mode.
Clement Courbet [Wed, 16 May 2018 11:49:15 +0000 (11:49 +0000)]
[llvm-exegesis] Fix unused variable warning in release mode.

llvm-svn: 332455

6 years agoTest commit access: remove superflous spaces
Gabor Marton [Wed, 16 May 2018 11:48:11 +0000 (11:48 +0000)]
Test commit access: remove superflous spaces

llvm-svn: 332454

6 years agoAMDGPU: Custom lower v4i16/v4f16 vector operations
Matt Arsenault [Wed, 16 May 2018 11:47:30 +0000 (11:47 +0000)]
AMDGPU: Custom lower v4i16/v4f16 vector operations

Avoids stack access.

Also handle extract hi elt pattern from truncate + shift
to avoid a couple test regressions.

llvm-svn: 332453

6 years ago[SimplifyLibcalls] Replace locked IO with unlocked IO
David Bolvansky [Wed, 16 May 2018 11:39:52 +0000 (11:39 +0000)]
[SimplifyLibcalls] Replace locked IO with unlocked IO

Summary: If file stream arg is not captured and source is fopen, we could replace IO calls by unlocked IO ("_unlocked" function variants) to gain better speed,

Reviewers: efriedma, RKSimon, spatel, sanjoy, hfinkel, majnemer, lebedev.ri, rja

Reviewed By: rja

Subscribers: rja, srhines, efriedma, lebedev.ri, llvm-commits

Differential Revision: https://reviews.llvm.org/D45736

llvm-svn: 332452

6 years ago[X86] Split WriteCvtI2F/WriteCvtF2I into I<->F32 and I<->F64 scheduler classes
Simon Pilgrim [Wed, 16 May 2018 10:53:45 +0000 (10:53 +0000)]
[X86] Split WriteCvtI2F/WriteCvtF2I into I<->F32 and I<->F64 scheduler classes

A lot of the models still have too many InstRW overrides for these new classes - this needs cleaning up but I wanted to get the classes in first

llvm-svn: 332451

6 years ago[LoopUnroll] Split out simplify code after Unroll into a new function. NFC
David Green [Wed, 16 May 2018 10:41:58 +0000 (10:41 +0000)]
[LoopUnroll] Split out simplify code after Unroll into a new function. NFC

So that it can be shared with other passes that may end up doing the same
thing.

Differential Revision: https://reviews.llvm.org/D45874

llvm-svn: 332450

6 years ago[GlobalISel][IRTranslator] Split aggregates during IR translation.
Amara Emerson [Wed, 16 May 2018 10:32:02 +0000 (10:32 +0000)]
[GlobalISel][IRTranslator] Split aggregates during IR translation.

We currently handle all aggregates by creating one large LLT, and letting the
legalizer deal with splitting them up. However using this approach means that
we can't support big endian code correctly.

This patch changes the way that the IRTranslator deals with aggregate values,
by splitting them up into their constituent element values. To do this, parts
of the translator need to be modified to deal with multiple VRegs for a single
Value.

A new Value to VReg mapper is introduced to help keep compile time under
control, currently there is no measurable impact on CTMark despite the extra
code being generated in some cases.

Patch is based on the original work of Tim Northover.

Differential Revision: https://reviews.llvm.org/D46018

llvm-svn: 332449

6 years ago[diagtool] Add diagtool to install target.
Jonas Devlieghere [Wed, 16 May 2018 10:23:25 +0000 (10:23 +0000)]
[diagtool] Add diagtool to install target.

Although not very well known, diagtool is an incredibly convenient
utility for dealing with diagnostics.
Particularly useful are the "tree" and "show-enabled" commands:

 - The former prints the hierarchy of diagnostic (warning) flags and
   which of them are enabled by default.
 - The latter can be used to replace an invocation to clang and will
   print which diagnostics are disabled, warnings or errors.
   For instance: `diagtool show-enabled -Wall -Werror /tmp/test.c` will
   print that -Wunused-variable (warn_unused_variable) will be treated as
   an error.

This patch adds them to the install target so it gets shipped with the
LLVM release. It also adds a very basic man page and mentions this
change in the release notes.

Differential revision: https://reviews.llvm.org/D46694

llvm-svn: 332448

6 years ago[llvm-mca] Regenerate tests after r332381 and r332361. NFC
Andrea Di Biagio [Wed, 16 May 2018 10:12:06 +0000 (10:12 +0000)]
[llvm-mca] Regenerate tests after r332381 and r332361. NFC

llvm-svn: 332447

6 years ago[mips] Add support for isBranchOffsetInRange and use it for MipsLongBranch
Simon Dardis [Wed, 16 May 2018 10:03:05 +0000 (10:03 +0000)]
[mips] Add support for isBranchOffsetInRange and use it for MipsLongBranch

Add support for this target hook, covering MIPS, microMIPS and MIPSR6, along
with some tests. Also add missing getOppositeBranchOpc() cases exposed by the
tests.

Reviewers: atanasyan, abeserminji, smaksimovic

Differential Revision: https://reviews.llvm.org/D46794

llvm-svn: 332446

6 years ago[llvm-exegesis] Add a flag to output analysis csv to a file.
Clement Courbet [Wed, 16 May 2018 09:50:04 +0000 (09:50 +0000)]
[llvm-exegesis] Add a flag to output analysis csv to a file.

Reviewers: gchatelet

Subscribers: llvm-commits, tschuett

Differential Revision: https://reviews.llvm.org/D46931

llvm-svn: 332445

6 years ago[AArch64] Support "S" inline assembler constraint
Peter Smith [Wed, 16 May 2018 09:33:25 +0000 (09:33 +0000)]
[AArch64] Support "S" inline assembler constraint

This patch re-introduces the "S" inline assembler constraint. This matches
an absolute symbolic address or a label reference. The primary use case is

asm("adrp %0, %1\n\t"
    "add %0, %0, :lo12:%1" : "=r"(addr) : "S"(&var));

I say re-introduces as it seems like "S" was implemented in the original
AArch64 backend, but it looks like it wasn't carried forward to the merged
backend. The original implementation had A and L modifiers that could be
used to print ":lo12:" to the string. It looks like gcc doesn't use these
and :lo12: is expected to be written in the inline assembly string so I've
not implemented A and L. Clang already supports the S modifier.

Fixes PR37180

Differential Revision: https://reviews.llvm.org/D46745

llvm-svn: 332444

6 years ago[llvm-mca] Remove redundant includes in Stage.h.
Andrea Di Biagio [Wed, 16 May 2018 09:24:38 +0000 (09:24 +0000)]
[llvm-mca] Remove redundant includes in Stage.h.

This patch also makes Stage::isReady() a const method.

No functional change.

llvm-svn: 332443

6 years ago[AArch64][SVE] Asm: Support for structured LD2, LD3 and LD4 (scalar+scalar) load...
Sander de Smalen [Wed, 16 May 2018 09:16:20 +0000 (09:16 +0000)]
[AArch64][SVE] Asm: Support for structured LD2, LD3 and LD4 (scalar+scalar) load instructions.

Reviewers: rengolin, fhahn, samparker, SjoerdMeijer, javed.absar

Reviewed By: fhahn

Differential Revision: https://reviews.llvm.org/D46679

llvm-svn: 332442

6 years agoFix unused variable warning in r332437.
Clement Courbet [Wed, 16 May 2018 09:10:04 +0000 (09:10 +0000)]
Fix unused variable warning in r332437.

llvm-svn: 332441

6 years agoEscape ]]> in xunit xml output
Alexander Richardson [Wed, 16 May 2018 09:00:28 +0000 (09:00 +0000)]
Escape ]]> in xunit xml output

Summary:
This sequence ends the CDATA block so any characters after that are no
longer escaped. This can be fixed by replacing "]]>" with "]]]]><![CDATA[>".

Reviewers: cmatthews

Reviewed By: cmatthews

Differential Revision: https://reviews.llvm.org/D46886

llvm-svn: 332440

6 years agoEmit a left-shift instead of a power-of-two multiply for jump-tables
Alexander Richardson [Wed, 16 May 2018 08:58:26 +0000 (08:58 +0000)]
Emit a left-shift instead of a power-of-two multiply for jump-tables

Summary:
SelectionDAGLegalize::ExpandNode() inserts an ISD::MUL when lowering a
BR_JT opcode. While many backends optimize this multiply into a shift, e.g.
the MIPS backend currently always lowers this into a sequence of
load-immediate+multiply+mflo in MipsSETargetLowering::lowerMulDiv().

I initially changed the multiply to a shift in the MIPS backend but it
turns out that would not have handled the MIPSR6 case and was a lot more
code than doing it in LegalizeDAG.
I believe performing this simple optimization in LegalizeDAG instead of
each individual backend is the better solution since this also fixes other
backeds such as MSP430 which calls the multiply runtime function
__mspabi_mpyi without this patch.

Reviewers: sdardis, atanasyan, pftbest, asl

Reviewed By: sdardis

Subscribers: llvm-commits

Differential Revision: https://reviews.llvm.org/D45760

llvm-svn: 332439

6 years ago[clangd] Fix a link failure in unittests
Heejin Ahn [Wed, 16 May 2018 08:53:57 +0000 (08:53 +0000)]
[clangd] Fix a link failure in unittests

Summary: D46524 (rL332378) introduced a link failure when built with
`-DSHARED_LIB=ON`, which this patch fixes.

Reviewers: ioeric

Subscribers: klimek, mgorny, ilya-biryukov, ioeric, MaskRay, jkorous, cfe-commits

Differential Revision: https://reviews.llvm.org/D46906

llvm-svn: 332438

6 years ago[llvm-exegesis] Analysis: Display sched class for instructions.
Clement Courbet [Wed, 16 May 2018 08:47:21 +0000 (08:47 +0000)]
[llvm-exegesis] Analysis: Display sched class for instructions.

Reviewers: gchatelet

Subscribers: tschuett, llvm-commits

Differential Revision: https://reviews.llvm.org/D46883

llvm-svn: 332437

6 years agoclang-format: Allow optimizer to break template declaration.
Francois Ferrand [Wed, 16 May 2018 08:25:03 +0000 (08:25 +0000)]
clang-format: Allow optimizer to break template declaration.

Summary:
Introduce `PenaltyBreakTemplateDeclaration` to control the penalty,
and change `AlwaysBreakTemplateDeclarations` to an enum with 3 modes:
* `No` for regular, penalty based, wrapping of template declaration
* `MultiLine` for always wrapping before multi-line declarations (e.g.
  same as legacy behavior when `AlwaysBreakTemplateDeclarations=false`)
* `Yes` for always wrapping (e.g. same as legacy behavior when
  `AlwaysBreakTemplateDeclarations=true`)

Reviewers: krasimir, djasper, klimek

Subscribers: cfe-commits

Differential Revision: https://reviews.llvm.org/D42684

llvm-svn: 332436

6 years ago[X86][SSE] Fix tests for vector rotates by splat variable.
Simon Pilgrim [Wed, 16 May 2018 08:23:47 +0000 (08:23 +0000)]
[X86][SSE] Fix tests for vector rotates by splat variable.

We weren't correctly splatting the offset shift

llvm-svn: 332435

6 years agoclang-format: tweak formatting of variable initialization blocks
Francois Ferrand [Wed, 16 May 2018 08:03:52 +0000 (08:03 +0000)]
clang-format: tweak formatting of variable initialization blocks

Summary:
This patch changes the behavior of PenaltyBreakBeforeFirstCallParameter
so that is does not apply after a brace, when Cpp11BracedListStyle is
false.

This way, variable initialization is wrapped more like an initializer
than like a function call, which is more consistent with user
expectations for this braced list style.

With PenaltyBreakBeforeFirstCallParameter=200, this gives the following
code: (with Cpp11BracedListStyle=false)

Before :

  const std::unordered_map<std::string, int> Something::MyHashTable =
      { { "aaaaaaaaaaaaaaaaaaaaa", 0 },
        { "bbbbbbbbbbbbbbbbbbbbb", 1 },
        { "ccccccccccccccccccccc", 2 } };

After :

  const std::unordered_set<std::string> Something::MyUnorderedSet = {
    { "aaaaaaaaaaaaaaaaaaaaa", 0 },
    { "bbbbbbbbbbbbbbbbbbbbb", 1 },
    { "ccccccccccccccccccccc", 2 }
  };

Reviewers: krasimir, djasper, klimek

Subscribers: cfe-commits

Differential Revision: https://reviews.llvm.org/D43290

llvm-svn: 332434

6 years ago[AArch64][SVE] Asm: Support for contiguous PRF prefetch instructions.
Sander de Smalen [Wed, 16 May 2018 07:50:09 +0000 (07:50 +0000)]
[AArch64][SVE] Asm: Support for contiguous PRF prefetch instructions.

Reviewers: rengolin, fhahn, samparker, SjoerdMeijer, javed.absar

Reviewed By: SjoerdMeijer

Differential Revision: https://reviews.llvm.org/D46682

llvm-svn: 332433

6 years ago[Unix] Indent ChangeStd{in,out}ToBinary.
Fangrui Song [Wed, 16 May 2018 06:43:27 +0000 (06:43 +0000)]
[Unix] Indent ChangeStd{in,out}ToBinary.

llvm-svn: 332432

6 years agoRemove unused variable introduced in r332336
Mikael Holmen [Wed, 16 May 2018 06:36:11 +0000 (06:36 +0000)]
Remove unused variable introduced in r332336

The unused variable caused a compilation warning:

../lib/Target/X86/X86ISelLowering.cpp:34614:17: error: unused variable 'SMax' [-Werror,-Wunused-variable]
    if (SDValue SMax = MatchMinMax(SMin, ISD::SMAX, C1))
                ^
1 error generated.

llvm-svn: 332431

6 years ago[ObjCARC] Prevent code motion into a catchswitch
Shoaib Meenai [Wed, 16 May 2018 04:52:18 +0000 (04:52 +0000)]
[ObjCARC] Prevent code motion into a catchswitch

A catchswitch must be the only non-phi instruction in its basic block;
attempting to move a retain or release into a catchswitch basic block
will result in invalid IR. Explicitly mark a CFG hazard in this case to
prevent the code motion.

Differential Revision: https://reviews.llvm.org/D46482

llvm-svn: 332430

6 years agoRevert "Signal handling should be signal-safe"
JF Bastien [Wed, 16 May 2018 04:36:37 +0000 (04:36 +0000)]
Revert "Signal handling should be signal-safe"

Some bots don't have double-pointer width compare-and-exchange. Revert for now.q

llvm-svn: 332429

6 years agoSignal handling should be signal-safe
JF Bastien [Wed, 16 May 2018 04:30:00 +0000 (04:30 +0000)]
Signal handling should be signal-safe

Summary:
Before this patch, signal handling wasn't signal safe. This leads to real-world
crashes. It used ManagedStatic inside of signals, this can allocate and can lead
to unexpected state when a signal occurs during llvm_shutdown (because
llvm_shutdown destroys the ManagedStatic). It also used cl::opt without custom
backing storage. Some de-allocation was performed as well. Acquiring a lock in a
signal handler is also a great way to deadlock.

We can't just disable signals on llvm_shutdown because the signals might do
useful work during that shutdown. We also can't just disable llvm_shutdown for
programs (instead of library uses of clang) because we'd have to then mark the
pointers as not leaked and make sure all the ManagedStatic uses are OK to leak
and remain so.

Move all of the code to lock-free datastructures instead, and avoid having any
of them in an inconsistent state. I'm not trying to be fancy, I'm not using any
explicit memory order because this code isn't hot. The only purpose of the
atomics is to guarantee that a signal firing on the same or a different thread
doesn't see an inconsistent state and crash. In some cases we might miss some
state (for example, we might fail to delete a temporary file), but that's fine.

Note that I haven't touched any of the backtrace support despite it not
technically being totally signal-safe. When that code is called we know
something bad is up and we don't expect to continue execution, so calling
something that e.g. sets errno is the least of our problems.

A similar patch should be applied to lib/Support/Windows/Signals.inc, but that
can be done separately.

<rdar://problem/28010281>

Reviewers: dexonsmith

Subscribers: aheejin, llvm-commits

Differential Revision: https://reviews.llvm.org/D46858

llvm-svn: 332428

6 years ago[DebugInfo] Only handle DBG_VALUE in InlineSpiller.
Shiva Chen [Wed, 16 May 2018 02:57:26 +0000 (02:57 +0000)]
[DebugInfo] Only handle DBG_VALUE in InlineSpiller.

The instructions using registers should be DBG_VALUE and normal
instructions. Use isDebugValue() to filter out DBG_VALUE and add
an assert to ensure there is no other kind of debug instructions
using the registers.

Differential Revision: https://reviews.llvm.org/D46739

Patch by Hsiangkai Wang.

llvm-svn: 332427

6 years agoFix LSR compile time hang.
Evgeny Stupachenko [Wed, 16 May 2018 02:48:50 +0000 (02:48 +0000)]
Fix LSR compile time hang.

Summary:
Limit number of reassociations in GenerateReassociationsImpl.

Reviewers: qcolombet, mkazantsev

Differential Revision: https://reviews.llvm.org/D46039

From: Evgeny Stupachenko <evstupac@gmail.com>
                         <evgeny.v.stupachenko@intel.com>
llvm-svn: 332426

6 years agoFix 32-bit buildbots.
Richard Smith [Wed, 16 May 2018 01:08:07 +0000 (01:08 +0000)]
Fix 32-bit buildbots.

llvm-svn: 332425

6 years agoremove output xml incase it is leftover from another run
Chris Matthews [Wed, 16 May 2018 00:37:00 +0000 (00:37 +0000)]
remove output xml incase it is leftover from another run

llvm-svn: 332424

6 years agoUse not to catch unexpected pass as well as remove old test results
Chris Matthews [Wed, 16 May 2018 00:33:29 +0000 (00:33 +0000)]
Use not to catch unexpected pass as well as remove old test results

As per review feedback, make sure we rm temp files, and make the return
code checking for lit more specific.

llvm-svn: 332423

6 years ago[analyzer] Do not crash on callback for call_once passed by value
George Karpenkov [Wed, 16 May 2018 00:29:13 +0000 (00:29 +0000)]
[analyzer] Do not crash on callback for call_once passed by value

https://bugs.llvm.org/show_bug.cgi?id=37312
rdar://40270582

Differential Revision: https://reviews.llvm.org/D46913

llvm-svn: 332422

6 years agoRevert commits r332160, r332164, r332236.
Douglas Yung [Wed, 16 May 2018 00:27:43 +0000 (00:27 +0000)]
Revert commits r332160, r332164, r332236.

It was decided this is the wrong approach to fix this issue.

llvm-svn: 332421

6 years agoARM: Remove unnecessary argument. NFCI.
Peter Collingbourne [Wed, 16 May 2018 00:21:47 +0000 (00:21 +0000)]
ARM: Remove unnecessary argument. NFCI.

IsLittleEndian is already a field of ARMAsmBackend.

llvm-svn: 332420

6 years agoARM: Deduplicate code and remove unnecessary declaration. NFCI.
Peter Collingbourne [Wed, 16 May 2018 00:21:31 +0000 (00:21 +0000)]
ARM: Deduplicate code and remove unnecessary declaration. NFCI.

llvm-svn: 332419

6 years ago[Debugify] Fix test failing after r332416
Anastasis Grammenos [Wed, 16 May 2018 00:11:52 +0000 (00:11 +0000)]
[Debugify] Fix test failing after r332416

I missed a test that needed an update.

Failing bot: http://lab.llvm.org:8011/builders/llvm-clang-lld-x86_64-scei-ps4-ubuntu-fast/builds/30071

llvm-svn: 332418

6 years ago[analyzer] Make plist-html diagnostic consumer produce multi-file reports.
Artem Dergachev [Wed, 16 May 2018 00:11:24 +0000 (00:11 +0000)]
[analyzer] Make plist-html diagnostic consumer produce multi-file reports.

Previously plist-html output produced multi-file HTML reports
but only single-file Plist reports.

Change plist-html output to produce multi-file Plist reports as well.

Differential Revision: https://reviews.llvm.org/D46902

llvm-svn: 332417

6 years ago[Debugfiy] Print the pass name next to the result
Anastasis Grammenos [Tue, 15 May 2018 23:38:05 +0000 (23:38 +0000)]
[Debugfiy] Print the pass name next to the result

CheckDebugify now prints the pass name right next to the result of the check.

Differential Revision: https://reviews.llvm.org/D46908

llvm-svn: 332416

6 years ago[MachineOutliner] Add optsize markings to outlined functions.
Eli Friedman [Tue, 15 May 2018 23:36:46 +0000 (23:36 +0000)]
[MachineOutliner] Add optsize markings to outlined functions.

It doesn't matter much this late in the pipeline, but one place that
does check for it is the function alignment code.

Differential Revision: https://reviews.llvm.org/D46373

llvm-svn: 332415