platform/upstream/llvm.git
2 years agoFix complex.conj integration test
Benjamin Kramer [Thu, 9 Jun 2022 11:09:46 +0000 (13:09 +0200)]
Fix complex.conj integration test

- It doesn't actually print the fractional part if the result is a whole number
- One of the expectations was just wrong

2 years ago[VPlan] Replace remaining use of needsScalarIV.
Florian Hahn [Thu, 9 Jun 2022 11:05:37 +0000 (12:05 +0100)]
[VPlan] Replace remaining use of needsScalarIV.

All information is already available in VPlan. Note that there are some
test changes, because we now can correctly look through instructions
like truncates to analyze the actual users.

Reviewed By: Ayal

Differential Revision: https://reviews.llvm.org/D123541

2 years agoRevert "[LIBOMPTARGET] Adding AMD to llvm-omp-device-info"
Jose Manuel Monsalve Diaz [Thu, 9 Jun 2022 10:46:03 +0000 (10:46 +0000)]
Revert "[LIBOMPTARGET] Adding AMD to llvm-omp-device-info"

This reverts commit d16a0877d8ac12a49fc75ae651247f338d46fead.

2 years agocmake: use llvm dir variables for clang/utils/hmaptool
Matheus Izvekov [Tue, 24 May 2022 16:21:34 +0000 (18:21 +0200)]
cmake: use llvm dir variables for clang/utils/hmaptool

Copy hmaptool using the paths for CURRENT_TOOLS_DIR, so
everything goes in the right place in case llvm is included
from a top level CMakeLists.txt.

Signed-off-by: Matheus Izvekov <mizvekov@gmail.com>
Reviewed By: stephenneuendorffer

Differential Revision: https://reviews.llvm.org/D126308

2 years ago[clangd] Minor refactor of CanonicalIncludes::addSystemHeadersMapping.
Paul Pluzhnikov [Thu, 9 Jun 2022 10:11:25 +0000 (12:11 +0200)]
[clangd] Minor refactor of CanonicalIncludes::addSystemHeadersMapping.

Before commit b3a991df3cd6a SystemHeaderMap used to be a vector.

Commit b3a991df3cd6a changed it into a map, but neglected to remove
duplicate keys (e.g. "bits/typesizes.h", "include/stdint.h", etc.).

To prevent confusion, remove all duplicates, build HeaderMapping
one pair at a time and assert() that no duplicates are found.

Change by Paul Pluzhnikov (ppluzhnikov)!

Reviewed By: ilya-biryukov

Differential Revision: https://reviews.llvm.org/D125742

2 years ago[Flang] Temporary fix for conversion materialization
Kiran Chandramohan [Thu, 9 Jun 2022 10:01:42 +0000 (10:01 +0000)]
[Flang] Temporary fix for conversion materialization

Simply add a source and target materialization handler that do nothing
and that override the default handlers that would add illegal
LLVM::DialectCastOp otherwise.

This is the simplest workaround, but not an actual fix, something may be
inconsistent after D82831 (most likely fir lowering to llvm happens in a
way that mlir infrastructure is not expecting in D82831).

Here is a minimal reproducer of what the issue was:
```
func @foop(%a : !fir.real<4>) -> ()
func @bar(%a : !fir.real<2>) {
  %1 = fir.convert %a : (!fir.real<2>) -> !fir.real<4>
  call @foop(%1) : (!fir.real<4>) -> ()
  return
}
```
tco -o - output was:
```
error: 'llvm.mlir.cast' op type must be non-index integer types, float types, or vector of mentioned types.
llvm.func @foop(!llvm.float)
llvm.func @bar(%arg0: !llvm.half) {
  %0 = llvm.fpext %arg0 : !llvm.half to !llvm.float
  %1 = llvm.mlir.cast %0 : !llvm.float to !fir.real<4>
  llvm.call @foop(%1) : (!fir.real<4>) -> ()
  llvm.return
}
```
This patch disable the introduction of the llvm.mlir.cast and preserve the previous behavior.

Also fixes https://github.com/llvm/llvm-project/issues/55210.

Note: This is part of upstreaming from the fir-dev branch of
https://github.com/flang-compiler/f18-llvm-project.

Reviewed By: awarzynski

Differential Revision: https://reviews.llvm.org/D127212

Co-authored-by: Jean Perier <jperier@nvidia.com>
Co-authored-by: Eric Schweitz <eschweitz@nvidia.com>
2 years ago[pseudo] Add grammar annotations support.
Haojian Wu [Thu, 9 Jun 2022 09:42:29 +0000 (11:42 +0200)]
[pseudo] Add grammar annotations support.

Add annotation handling ([key=value]) in the BNF grammar parser, which
will be used in the conditional reduction, and error recovery.

Reviewed By: sammccall

Differential Revision: https://reviews.llvm.org/D126536

2 years ago[FixupStatepoints] Precommit test for D127308. NFC
Denis Antrushin [Thu, 9 Jun 2022 09:35:52 +0000 (16:35 +0700)]
[FixupStatepoints] Precommit test for D127308. NFC

2 years ago[Attributor] Generalize interface from ConstantInt to Constant
Johannes Doerfert [Thu, 19 May 2022 17:35:52 +0000 (12:35 -0500)]
[Attributor] Generalize interface from ConstantInt to Constant

We can use constant to allow undef and there is no need to force
integers in the API anyway. The user can decide if a non integer
constant is fine or not.

2 years ago[Attributor][FIX] Replace call site argument uses, not values
Johannes Doerfert [Thu, 19 May 2022 16:20:21 +0000 (11:20 -0500)]
[Attributor][FIX] Replace call site argument uses, not values

We need to be careful replacing values as call site arguments
(IRPosition::IRP_CALL_SITE_ARGUMENT) is representing a use and not a
value. This patch replaces the interface to take a IR position instead
making it harder to misuse accidentally. It does not change our tests
right now but a follow up exposed the potential footgun.

2 years ago[Attributor] Simplify (integer range) state handling
Johannes Doerfert [Thu, 19 May 2022 16:03:01 +0000 (11:03 -0500)]
[Attributor] Simplify (integer range) state handling

We used to be very conservative when integer states were merged.
Instead of adding the known range (which is large due to uncertainty)
into the assumed range (which is hopefully small), we can also only
allow to merge in both at the same time into their respective
counterpart. This will ensure we keep the invariant that assumed is part
of known.

2 years ago[Attributor][NFC] Introduce helper struct
Johannes Doerfert [Tue, 10 May 2022 22:05:18 +0000 (18:05 -0400)]
[Attributor][NFC] Introduce helper struct

We often use a context associated with a value. For now only one use
case has been changed.

2 years ago[Attributor][FIX] Avoid metadata and duplicate replication assertion
Johannes Doerfert [Wed, 13 Apr 2022 17:35:16 +0000 (12:35 -0500)]
[Attributor][FIX] Avoid metadata and duplicate replication assertion

When we recreate instructions as part of simplification we need to take
care of debug metadata and replacing the value multiple times. For now,
we handle both conservatively.

2 years ago[InstCombine] Combine instructions of type or/and where AND masks can be combined.
Biplob Mishra [Thu, 9 Jun 2022 09:58:30 +0000 (10:58 +0100)]
[InstCombine] Combine instructions of type or/and where AND masks can be combined.

The patch simplifies some of the patterns as below

(A | (B & C0)) | (B & C1) -> A | (B & C0|C1)
((B & C0) | A) | (B & C1) -> (B & C0|C1) | A

In some scenarios like byte reverse on half word, we can see this pattern multiple times and this conversion can optimize these patterns.

Additionally this commit fixes the issue reported with the test case.
int f(int a, int b) {
  int c = ((unsigned char)(a >> 23) & 925);
  if (a)
    c = (a >> 23 & b) | ((unsigned char)(a >> 23) & 925) | (b >> 23 & 157);
  return c;
}

The previous revision/commit did not check one-use of an intermediate value that this transform re-uses.
When that value has another use, an existing transform will try to invert the transform here.
By adding one-use checks, we avoid the infinite loops seen with the earlier commit.

Differential Revision: https://reviews.llvm.org/D124119

2 years ago[flang] Add RUN lines using `fir-opt`
Andrzej Warzynski [Fri, 3 Jun 2022 10:29:30 +0000 (10:29 +0000)]
[flang] Add RUN lines using `fir-opt`

In tests that define a pass pipeline to use, add a RUN line using fir-opt.

Differential Revision: https://reviews.llvm.org/D126955

2 years ago[Flang][OpenMP] Lower schedule modifiers for worksharing loop
Kiran Chandramohan [Thu, 9 Jun 2022 09:34:21 +0000 (09:34 +0000)]
[Flang][OpenMP] Lower schedule modifiers for worksharing loop

Add support for lowering the schedule modifiers (simd, monotonic,
non-monotonic) in worksharing loops.

Note: This is part of upstreaming from the fir-dev branch of
https://github.com/flang-compiler/f18-llvm-project.

Reviewed By: peixin

Differential Revision: https://reviews.llvm.org/D127311

Co-authored-by: Mats Petersson <mats.petersson@arm.com>
Co-authored-by: Jean Perier <jperier@nvidia.com>
Co-authored-by: Eric Schweitz <eschweitz@nvidia.com>
Co-authored-by: V Donaldson <vdonaldson@nvidia.com>
2 years ago[mlir] Introduce Transform ops for loops
Alex Zinenko [Thu, 9 Jun 2022 09:10:32 +0000 (11:10 +0200)]
[mlir] Introduce Transform ops for loops

Introduce transform ops for "for" loops, in particular for peeling, software
pipelining and unrolling, along with a couple of "IR navigation" ops. These ops
are intended to be generalized to different kinds of loops when possible and
therefore use the "loop" prefix. They currently live in the SCF dialect as
there is no clear place to put transform ops that may span across several
dialects, this decision is postponed until the ops actually need to handle
non-SCF loops.

Additionally refactor some common utilities for transform ops into trait or
interface methods, and change the loop pipelining to be a returning pattern.

Reviewed By: springerm

Differential Revision: https://reviews.llvm.org/D127300

2 years ago[flang][driver] Generate run-time type info
Andrzej Warzynski [Wed, 8 Jun 2022 14:37:12 +0000 (14:37 +0000)]
[flang][driver] Generate run-time type info

This is a small follow-up for https://reviews.llvm.org/D120051. It makes
sure that tables with "run-time type information for derived types" are
generated for code-gen actions. Originally, only non-code-gen actions
were updated (i.e. actions that were fully supported at that time).

Differential Revision: https://reviews.llvm.org/D127307

2 years ago[pseudo] Simplify the glrReduce implementation.
Haojian Wu [Wed, 8 Jun 2022 09:59:40 +0000 (11:59 +0200)]
[pseudo] Simplify the glrReduce implementation.

glrReduce maintains two priority queues (one for bases, and the other
for Sequence), these queues are in parallel with each other, corresponding to a
single family. They can be folded into one.

This patch removes the bases priority queue, which improves the glrParse by
10%.

ASTReader.cpp: 2.03M/s (before) vs 2.26M/s (after)

Differential Revision: https://reviews.llvm.org/D127283

2 years ago[clang-format][NFC] Format lib/Format and unittests/Format in clang
owenca [Thu, 9 Jun 2022 00:07:04 +0000 (17:07 -0700)]
[clang-format][NFC] Format lib/Format and unittests/Format in clang

Reformat these directories with InsertBraces and RemoveBracesLLVM.

Differential Revision: https://reviews.llvm.org/D127366

2 years ago[pseudo] Remove the explicit Accept actions.
Haojian Wu [Wed, 8 Jun 2022 11:26:53 +0000 (13:26 +0200)]
[pseudo] Remove the explicit Accept actions.

As pointed out in the previous review section, having a dedicated accept
action doesn't seem to be necessary. This patch implements the the same behavior
without accept acction, which will save some code complexity.

Reviewed By: sammccall

Differential Revision: https://reviews.llvm.org/D125677

2 years ago[pseudo] Fix a sign-compare warning in debug build, NFC.
Haojian Wu [Thu, 9 Jun 2022 09:18:03 +0000 (11:18 +0200)]
[pseudo] Fix a sign-compare warning in debug build, NFC.

2 years ago[mlir][complex] Correctness check for complex.conj
lewuathe [Thu, 9 Jun 2022 09:11:44 +0000 (11:11 +0200)]
[mlir][complex] Correctness check for complex.conj

Add correctness check for complex.conj operation

Reviewed By: pifon2a

Differential Revision: https://reviews.llvm.org/D127377

2 years ago[ARM][ParallelDSP] Fix self reference bug
Sam Parker [Thu, 9 Jun 2022 08:41:44 +0000 (08:41 +0000)]
[ARM][ParallelDSP] Fix self reference bug

Ensure we don't generate a smlad intrinsic that takes itself as an
argument.

Differential Revision: https://reviews.llvm.org/D127213

2 years ago[SelectionDAG] Handle bzero/memset libcalls globally instead of per target
Guillaume Chatelet [Wed, 8 Jun 2022 09:39:49 +0000 (09:39 +0000)]
[SelectionDAG] Handle bzero/memset libcalls globally instead of per target

Differential Revision: https://reviews.llvm.org/D127279

2 years ago[cmake] Add missing dependencies to objlib in add_llvm_executable.
Florian Hahn [Thu, 9 Jun 2022 08:24:06 +0000 (09:24 +0100)]
[cmake] Add missing dependencies to objlib in add_llvm_executable.

After f06abbb393800b0d466c88e283c06f75561c432c I have been seeing build
failures due to the obj.clang target missing a dependency on
tools/clang/clang-tablegen-targets.

This appears to be due to the fact that LLVM_COMMON_DEPENDS are not added
as dependencies to the object library.

This patch uses the same logic as llvm_add_library to register
dependencies for object libraries.

Reviewed By: beanz, abrachet, steven_wu

Differential Revision: https://reviews.llvm.org/D127318

2 years ago[InstCombine] improve fold for icmp-ugt-ashr
Chenbing Zheng [Thu, 9 Jun 2022 08:15:42 +0000 (16:15 +0800)]
[InstCombine] improve fold for icmp-ugt-ashr

Existing condition for
fold icmp ugt (ashr X, ShAmtC), C --> icmp ugt X, ((C + 1) << ShAmtC) - 1
missed some boundary. It cause this fold don't work for some cases, and the
reason is due to signed number overflow.

Reviewed By: spatel

Differential Revision: https://reviews.llvm.org/D127188

2 years ago[RISCV][VP] Add fp test of widen and split for vp.setcc
Lian Wang [Wed, 8 Jun 2022 01:52:29 +0000 (01:52 +0000)]
[RISCV][VP] Add fp test of widen and split for vp.setcc

Reviewed By: frasercrmck

Differential Revision: https://reviews.llvm.org/D127079

2 years ago[IndVarSimplify] Don't assert that terminator is not SCEVable (PR55925)
Nikita Popov [Wed, 8 Jun 2022 10:51:29 +0000 (12:51 +0200)]
[IndVarSimplify] Don't assert that terminator is not SCEVable (PR55925)

The IV widening code currently asserts that terminators aren't SCEVable
-- however, this is not the case for invokes with a returned attribute.

As far as I can tell, this assertions is not necessary -- even if we
have a critical edge (the second test case), the trunc gets inserted
in a legal position.

Fixes https://github.com/llvm/llvm-project/issues/55925.

Differential Revision: https://reviews.llvm.org/D127288

2 years agoADT/ArrayRef: Add makeMutableArrayRef overloads
Nicolai Hähnle [Fri, 29 Apr 2022 23:59:37 +0000 (18:59 -0500)]
ADT/ArrayRef: Add makeMutableArrayRef overloads

Equivalent overloads already exist for makeArrayRef.

Differential Revision: https://reviews.llvm.org/D126421

2 years ago[RISCV][test] Add widen STEP_VECTOR tests.
Lian Wang [Thu, 9 Jun 2022 07:34:54 +0000 (07:34 +0000)]
[RISCV][test] Add widen STEP_VECTOR tests.

Reviewed By: reames

Differential Revision: https://reviews.llvm.org/D127371

2 years ago[include-cleaner] Fix build error in unit test
Christian Kandeler [Thu, 9 Jun 2022 07:38:12 +0000 (03:38 -0400)]
[include-cleaner] Fix build error in unit test

Reviewed By: nridge

Differential Revision: https://reviews.llvm.org/D127217

2 years ago[MLIR][Math] Re-order conversions alphabetically (NFC)
lorenzo chelini [Thu, 9 Jun 2022 07:05:44 +0000 (09:05 +0200)]
[MLIR][Math] Re-order conversions alphabetically (NFC)

Minor follow-up after: D127286 (https://reviews.llvm.org/D127286/new/)

Reviewed By: ftynse

Differential Revision: https://reviews.llvm.org/D127382

2 years agoclang: Introduce -fexperimental-max-bitint-width
Matthias Gehre [Wed, 8 Jun 2022 09:31:52 +0000 (10:31 +0100)]
clang: Introduce -fexperimental-max-bitint-width

This splits of the introduction of -fexperimental-max-bitint-width
from https://reviews.llvm.org/D122234
because that PR is still blocked on discussions on the backend side.

I was asked [0] to upstream at least the flag.

[0] https://github.com/llvm/llvm-project/commit/09854f2af3b914b616f29cb640bede3a27cf7c4e#commitcomment-75116619

Differential Revision: https://reviews.llvm.org/D127287

2 years ago[Clang][CoverageMapping] Fix compile time explosions by adjusting only appropriated...
Bruno Cardoso Lopes [Wed, 8 Jun 2022 07:54:05 +0000 (00:54 -0700)]
[Clang][CoverageMapping] Fix compile time explosions by adjusting only appropriated skipped ranges

D83592 added comments to be part of skipped regions, and as part of that, it
also shrinks a skipped range if it spans a line that contains a non-comment
token. This is done by `adjustSkippedRange`.

The `adjustSkippedRange` currently runs on skipped regions that are not
comments, causing a 5min regression while building a big C++ files without any
comments.

Fix the compile time introduced in D83592 by tagging SkippedRange with kind
information and use that to decide what needs additional processing.

Differential Revision: https://reviews.llvm.org/D127338

2 years ago[Sanitizers] prctl interception update for the PR_SET_VMA option case.
David Carlier [Thu, 9 Jun 2022 05:07:26 +0000 (06:07 +0100)]
[Sanitizers] prctl interception update for the PR_SET_VMA option case.

Supports on Android but also from Linux 5.17

Reviewers: vitalybuka, eugenis

Reviewed-By: vitalybuka
Differential Revision: https://reviews.llvm.org/D127326

2 years ago[DeadArgElim] Remove dead code after r128810
Fangrui Song [Thu, 9 Jun 2022 04:11:54 +0000 (21:11 -0700)]
[DeadArgElim] Remove dead code after r128810

2 years ago[lld-macho] Support EH frames under arm64
Jez Ng [Thu, 9 Jun 2022 03:41:29 +0000 (23:41 -0400)]
[lld-macho] Support EH frames under arm64

For arm64, llvm-mc emits relocations for the target function
address like so:

  ltmp:
    <CIE start>
    ...
    <CIE end>
    ... multiple FDEs ...
    <FDE start>
    <target function address - (ltmp + pcrel offset)>
    ...

If any of the FDEs in `multiple FDEs` get dead-stripped, then `FDE start`
will move to an earlier address, and `ltmp + pcrel offset` will no longer
reflect an accurate pcrel value. To avoid this problem, we "canonicalize"
our relocation by adding an `EH_Frame` symbol at `FDE start`, and updating
the reloc to be `target function address - (EH_Frame + new pcrel offset)`.

Reviewed By: #lld-macho, Roger

Differential Revision: https://reviews.llvm.org/D124561

2 years ago[lld-macho] Initial support for EH Frames
Jez Ng [Thu, 9 Jun 2022 03:40:52 +0000 (23:40 -0400)]
[lld-macho] Initial support for EH Frames

== Background ==

`llvm-mc` generates unwind info in both compact unwind and DWARF
formats. LLD already handles the compact unwind format; this diff gets
us close to handling the DWARF format properly.

== Caveats ==

It's not quite done yet, but I figure it's worth getting this reviewed
and landed first as it's shaping up to be a fairly large code change.

**Known limitations of the current code:**

* Only works for x86_64, for which `llvm-mc` emits "abs-ified"
  relocations as described in https://github.com/llvm/llvm-project/commit/618def651b59bd42c05bbd91d825af2fb2145683.
  `llvm-mc` emits regular relocations for ARM EH frames, which we do not
  yet handle correctly.

Since the feature is not ready for real use yet, I've gated it behind a
flag that only gets toggled on during test suite runs. With most of the
new code disabled, we see just a hint of perf regression, so I don't
think it'd be remiss to land this as-is:

             base           diff           difference (95% CI)
  sys_time   1.926 ± 0.168  1.979 ± 0.117  [  -1.2% ..   +6.6%]
  user_time  3.590 ± 0.033  3.606 ± 0.028  [  +0.0% ..   +0.9%]
  wall_time  7.104 ± 0.184  7.179 ± 0.151  [  -0.2% ..   +2.3%]
  samples    30             31

== Design ==

Like compact unwind entries, EH frames are also represented as regular
ConcatInputSections that get pointed to via `Defined::unwindEntry`. This
allows them to be handled generically by e.g. the MarkLive and ICF
code. (But note that unlike compact unwind subsections, EH frame
subsections do end up in the final binary.)

In order to make EH frames "look like" a regular ConcatInputSection,
some processing is required. First, we need to split the `__eh_frame`
section along EH frame boundaries rather than along symbol boundaries.
We do this by decoding the length field of each EH frame. Second, the
abs-ified relocations need to be turned into regular Relocs.

== Next Steps ==

In order to support EH frames on ARM targets, we will either have to
teach LLD how to handle EH frames with explicit relocs, or we can try to
make `llvm-mc` emit abs-ified relocs for ARM as well. I'm hoping to do
the latter as I think it will make the LLD implementation both simpler
and faster to execute.

== Misc ==

The `obj-file-with-stabs.s` test had to be updated as the previous
version would trip assertion errors in the code. It appears that in our
attempt to produce a minimal YAML test input, we created a file with
invalid EH frame data. I've fixed this by re-generating the YAML and not
doing any hand-pruning of it.

Reviewed By: #lld-macho, Roger

Differential Revision: https://reviews.llvm.org/D123435

2 years ago[mlir][ods] Mark StructAttr as deprecated
Mogball [Thu, 9 Jun 2022 03:02:21 +0000 (03:02 +0000)]
[mlir][ods] Mark StructAttr as deprecated

2 years ago[InstCombine] Add vector tests for shl+lshr+and transforms; NFC
chenglin.bi [Thu, 9 Jun 2022 03:13:56 +0000 (11:13 +0800)]
[InstCombine] Add vector tests for shl+lshr+and transforms; NFC
D126617

2 years ago[msan][test] Fix cpusetsize for another pthread_getaffinity_np.cpp test
Fangrui Song [Thu, 9 Jun 2022 03:08:05 +0000 (20:08 -0700)]
[msan][test] Fix cpusetsize for another pthread_getaffinity_np.cpp test

Similar to D127368

2 years ago[libc++] Towards a simpler extern template story in libc++
Louis Dionne [Tue, 8 Jun 2021 21:25:08 +0000 (17:25 -0400)]
[libc++] Towards a simpler extern template story in libc++

The flexibility around extern template instantiation declarations in
libc++ result in a very complicated model, especially when support for
slightly different configurations (like the debug mode or assertions
in the dylib) are taken into account. That results in unexpected bugs
like http://llvm.org/PR50534 (and there have been multiple similar
bugs in the past, notably around the debug mode).

This patch gets rid of the _LIBCPP_DISABLE_EXTERN_TEMPLATE knob, which
I don't think is fundamental. Indeed, the motivation for that knob was to
avoid taking a dependency on the library, however that can be done better
by linking against the static library instead. And in fact, some parts of
the headers will always depend on things defined in the library, which
defeats the original goal of _LIBCPP_DISABLE_EXTERN_TEMPLATE.

Differential Revision: https://reviews.llvm.org/D103960

2 years ago[RISCV] Fix 80 column violations in RISCVInsertVSETVLI.cpp. NFC
Craig Topper [Thu, 9 Jun 2022 01:34:26 +0000 (18:34 -0700)]
[RISCV] Fix 80 column violations in RISCVInsertVSETVLI.cpp. NFC

I think these were likely introduced in the recent work done to
this pass.

2 years ago[msan][test] Use a large cpusetsize for pthread_getaffinity_np
Fangrui Song [Thu, 9 Jun 2022 01:50:23 +0000 (18:50 -0700)]
[msan][test] Use a large cpusetsize for pthread_getaffinity_np

pthread_getaffinity_np (Linux `kernel/sched/core.c:sched_getaffinity`) fails
with EINVAL if 8*cpusetsize (constant in glibc: 1024) is smaller than
`nr_cpu_ids` (CONFIG_NR_CPUS, which is 2048 for several arch/powerpc/configs
configurations).

The build bot clang-ppc64le-linux-lnt seems to have a larger `nr_cpu_ids`.

Differential Revision: https://reviews.llvm.org/D127368

2 years ago[MicrosoftDemangle] Set error to true when returning nullptr.
Zequan Wu [Thu, 9 Jun 2022 00:08:22 +0000 (17:08 -0700)]
[MicrosoftDemangle] Set error to true when returning nullptr.

2 years ago[lld/mac] Write output sections in parallel
Michael Eisel [Thu, 9 Jun 2022 00:09:48 +0000 (20:09 -0400)]
[lld/mac] Write output sections in parallel

This reduces linking time by ~8% for my project (1.19s -> 0.53s for
writeSections()). writeTo is const, which bodes well for it being
parallelizable, and I've looked through the different overridden versions and
can't see any race conditions. It produces the same byte-for-byte output for my
project.

Differential Revision: https://reviews.llvm.org/D126800

2 years agoAdd help text for "breakpoint name", describing the feature more fully.
Jim Ingham [Wed, 8 Jun 2022 18:08:32 +0000 (11:08 -0700)]
Add help text for "breakpoint name", describing the feature more fully.

https://reviews.llvm.org/D127038

2 years ago[BOLT]DWARF] Eagerly write out loclists
Alexander Yermolovich [Wed, 8 Jun 2022 23:52:23 +0000 (16:52 -0700)]
[BOLT]DWARF] Eagerly write out loclists

Taking advantage of us being able to re-write .debug_info to reduce memory
footprint loclists. Writing out loc-list as they are added, similar to how
we handle ranges.

Collected on clang-14
trunk
4:41.20 real,   389.50 user,    59.50 sys,      0 amem, 38412532 mmem
4:30.08 real,   376.10 user,    63.75 sys,      0 amem, 38477844 mmem
4:25.58 real,   373.76 user,    54.71 sys,      0 amem, 38439660 mmem
diff
4:34.66 real,   392.83 user,    57.73 sys,      0 amem, 38382560 mmem
4:35.96 real,   377.70 user,    58.62 sys,      0 amem, 38255840 mmem
4:27.61 real,    390.18 user,    57.02 sys,      0 amem, 38223224 mmem

Reviewed By: maksfb

Differential Revision: https://reviews.llvm.org/D126999

2 years ago[gn build] (manually) port 0e9a01dcac99 (libcxx module.modulemap gen)
Nico Weber [Wed, 8 Jun 2022 23:50:52 +0000 (19:50 -0400)]
[gn build] (manually) port 0e9a01dcac99 (libcxx module.modulemap gen)

2 years ago[ORC] Add an output stream operator for SymbolStringPool.
Lang Hames [Wed, 8 Jun 2022 23:48:15 +0000 (16:48 -0700)]
[ORC] Add an output stream operator for SymbolStringPool.

Handy for checking string pool state, e.g. when debugging dangling-pool-entry
errors.

2 years ago[RISCV] Add debug message that should have been in D126843.
Craig Topper [Wed, 8 Jun 2022 23:46:01 +0000 (16:46 -0700)]
[RISCV] Add debug message that should have been in D126843.

For consistency with the other messages in this file.

2 years ago[LLDB][NativePDB] Fix several crashes when parsing debug info.
Zequan Wu [Wed, 8 Jun 2022 22:49:24 +0000 (15:49 -0700)]
[LLDB][NativePDB] Fix several crashes when parsing debug info.
1. If array element type is a tag decl, complete it.
2. Fix few places where `asTag` should be used instead of `asClass()`.
3. Handle the case that `PdbAstBuilder::CreateFunctionDecl` return nullptr mainly due to an existing workaround (`m_cxx_record_map`).
4. `FindMembersSize` should never return error as this would cause early exiting in `CVTypeVisitor::visitFieldListMemberStream` and then cause assertion failure.
5. In some pdbs from C++ runtime libraries have S_LPROC32 followed directly by S_LOCAL and the local variable location is a S_DEFRANGE_FRAMEPOINTER_REL. There is no information about base frame register in this case, ignoring it by returning RegisterId::NONE.
6. Add a TODO when S_DEFRANGE_SUBFIELD_REGISTER describes the variable location of a pointer type. For now, just ignoring it if the variable is pointer.

2 years ago[docs][clang] Fixing minor typo
Jose Manuel Monsalve Diaz [Wed, 8 Jun 2022 23:35:11 +0000 (23:35 +0000)]
[docs][clang] Fixing minor typo

Changing "tot the" to "to the"

2 years ago[clang][dataflow] Remove IndirectionValue class, moving PointeeLoc field into Pointer...
Wei Yi Tee [Wed, 8 Jun 2022 23:15:51 +0000 (01:15 +0200)]
[clang][dataflow] Remove IndirectionValue class, moving PointeeLoc field into PointerValue and ReferenceValue

This patch precedes a future patch to make PointeeLoc for PointerValue possibly empty (for nullptr), by using a pointer instead of a reference type.
ReferenceValue should maintain a non-empty PointeeLoc reference.

Reviewed By: gribozavr2

Differential Revision: https://reviews.llvm.org/D127312

2 years ago[MSAN] print out the only possible invalid parameter (EINVAL is returned)
Kevin Athey [Wed, 8 Jun 2022 23:21:53 +0000 (16:21 -0700)]
[MSAN] print out the only possible invalid parameter (EINVAL is returned)

One more round attempting to figure what is wrong.

Depends on: https://reviews.llvm.org/D127346

Reviewed By: vitalybuka

Differential Revision: https://reviews.llvm.org/D127359

2 years ago[NFC] clang: add test for PR55886
Matheus Izvekov [Wed, 8 Jun 2022 22:49:52 +0000 (00:49 +0200)]
[NFC] clang: add test for PR55886

Signed-off-by: Matheus Izvekov <mizvekov@gmail.com>
Differential Revision: https://reviews.llvm.org/D127361

2 years ago[lldb] Add assertState function to the API test suite
Jonas Devlieghere [Wed, 8 Jun 2022 22:57:41 +0000 (15:57 -0700)]
[lldb] Add assertState function to the API test suite

Add a function to make it easier to debug a test failure caused by an
unexpected state.

Currently, tests are using assertEqual which results in a cryptic error
message: "AssertionError: 5 != 10". Even when a test provides a message
to make it clear why a particular state is expected, you still have to
figure out which of the two was the expected state, and what the other
value corresponds to.

We have a function in lldbutil that helps you convert the state number
into a user readable string. This patch adds a wrapper around
assertEqual specifically for comparing states and reporting better error
messages.

The aforementioned error message now looks like this: "AssertionError:
stopped (5) != exited (10)". If the user provided a message, that
continues to get printed as well.

Differential revision: https://reviews.llvm.org/D127355

2 years ago[clang-format] Remove braces of else blocks that embody an if block
owenca [Mon, 6 Jun 2022 10:03:27 +0000 (03:03 -0700)]
[clang-format] Remove braces of else blocks that embody an if block

Fixes #55663.

Differential Revision: https://reviews.llvm.org/D127260

2 years ago[libc++] Fix modules builds when features are removed
Louis Dionne [Mon, 23 May 2022 20:48:47 +0000 (16:48 -0400)]
[libc++] Fix modules builds when features are removed

When some headers are not available because we removed features like
localization or threads, the compiler should not try to include these
headers when building modules. To avoid that from happening, add a
requires-declaration that is never satisfied when the configuration
in use doesn't support a header.

rdar://93777687

Differential Revision: https://reviews.llvm.org/D127127

2 years ago[libc][NFC] Mark some methods constexpr
Alex Brachet [Wed, 8 Jun 2022 22:39:52 +0000 (22:39 +0000)]
[libc][NFC] Mark some methods constexpr

gcc is complaining that these methods are being called
from a function that is marked constexpr but these
aren't.

2 years ago[BOLT][NFC] Replace stdio with raw_ostream in CallGraph
Huan Nguyen [Wed, 8 Jun 2022 22:37:25 +0000 (15:37 -0700)]
[BOLT][NFC] Replace stdio with raw_ostream in CallGraph

Replacing stdio functions, e.g., fopen, fprintf, with raw_ostream.

Test Plan:
```
ninja check-bolt
```

Reviewed By: Amir

Differential Revision: https://reviews.llvm.org/D126826

2 years ago[lldb] Update TestModuleLoadedNotifys.py for macOS Ventura
Jonas Devlieghere [Wed, 8 Jun 2022 21:37:00 +0000 (14:37 -0700)]
[lldb] Update TestModuleLoadedNotifys.py for macOS Ventura

On macOS Ventura and later, dyld and the main binary will be loaded
again when dyld moves itself into the shared cache. Update the test
accordingly.

Differential revision: https://reviews.llvm.org/D127331

2 years ago[lldb/Commands] Prevent crash due to reading memory from page zero.
Chelsea Cassanova [Sat, 4 Jun 2022 00:04:13 +0000 (20:04 -0400)]
[lldb/Commands] Prevent crash due to reading memory from page zero.

Adds a check to ensure that a process exists before attempting to get
its ABI to prevent lldb from crashing due to trying to read from page zero.

Differential revision: https://reviews.llvm.org/D127016

2 years ago[mlir][sparse] Fix a problem introduced by the PR for reading complex number.
bixia1 [Wed, 8 Jun 2022 21:57:54 +0000 (14:57 -0700)]
[mlir][sparse] Fix a problem introduced by the PR for reading complex number.

The problem is in function isValid.

Reviewed By: Mogball

Differential Revision: https://reviews.llvm.org/D127349

2 years ago[SelectionDAG] Teach computeKnownBits that a nsw self multiply produce a positive...
Craig Topper [Wed, 8 Jun 2022 20:10:36 +0000 (13:10 -0700)]
[SelectionDAG] Teach computeKnownBits that a nsw self multiply produce a positive value.

This matches what we do in IR. For the RISC-V test case, this allows
us to use -8 for the AND mask instead of materializing a constant in a register.

Reviewed By: spatel

Differential Revision: https://reviews.llvm.org/D127335

2 years ago[pseudo] GC GSS nodes, reuse them with a freelist
Sam McCall [Tue, 31 May 2022 21:58:26 +0000 (23:58 +0200)]
[pseudo] GC GSS nodes, reuse them with a freelist

Most GSS nodes have short effective lifetimes, keeping them around until the
end of the parse is wasteful. Mark and sweep them every 20 tokens.

When parsing clangd/AST.cpp, this reduces the GSS memory from 1MB to 20kB.
We pay ~5% performance for this according to the glrParse benchmark.
(Parsing more tokens between GCs doesn't seem to improve this further).

Compared to the refcounting approach in https://reviews.llvm.org/D126337, this
is simpler (at least the complexity is better isolated) and has >2x less
overhead. It doesn't provide death handlers (for error-handling) but we have
an alternative solution in mind.

Differential Revision: https://reviews.llvm.org/D126723

2 years ago[pseudo] Restore accidentally removed debug print
Sam McCall [Wed, 8 Jun 2022 21:39:34 +0000 (23:39 +0200)]
[pseudo] Restore accidentally removed debug print

2 years ago[pseudo] Invert rows/columns of LRTable storage for speedup. NFC
Sam McCall [Fri, 3 Jun 2022 21:48:41 +0000 (23:48 +0200)]
[pseudo] Invert rows/columns of LRTable storage for speedup. NFC

There are more states than symbols.
This means first partioning the action list by state leaves us with a smaller
range to binary search over. This improves find() a lot and glrParse() by 7%.
The tradeoff is storing more smaller ranges increases the size of the offsets
array, overall grammar memory is +1% (337->340KB).

Before:
glrParse    188795975 ns    188778003 ns           77 bytes_per_second=1.98068M/s
After:
glrParse    175936203 ns    175916873 ns           81 bytes_per_second=2.12548M/s

Differential Revision: https://reviews.llvm.org/D127006

2 years agoFix FunctionPropertiesAnalysis updating callsite in 1-BB loop
Mircea Trofin [Wed, 8 Jun 2022 21:30:43 +0000 (14:30 -0700)]
Fix FunctionPropertiesAnalysis updating callsite in 1-BB loop

If the callsite is in a single BB loop, we need to exclude the BB from
the successor set (in which it'd be a member), because that set forms a
boundary at which we stop traversing the CFG, when re-ingesting BBs
after inlining; but after inlining, the callsite BB's new successors
should be visited.

Reviewed By: kazu

Differential Revision: https://reviews.llvm.org/D127178

2 years ago[ELF] Support 'G' in .eh_frame
Florian Mayer [Wed, 8 Jun 2022 21:22:04 +0000 (14:22 -0700)]
[ELF] Support 'G' in .eh_frame

Reviewed By: MaskRay, eugenis

Differential Revision: https://reviews.llvm.org/D127148

2 years ago[DWARF] Support 'G' in dwarf parser
Florian Mayer [Wed, 8 Jun 2022 20:56:50 +0000 (13:56 -0700)]
[DWARF] Support 'G' in dwarf parser

Reviewed By: MaskRay

Differential Revision: https://reviews.llvm.org/D127171

2 years ago[mlgo] Disable accounting upon ForceStop
Jin Xin Ng [Wed, 8 Jun 2022 21:23:34 +0000 (14:23 -0700)]
[mlgo] Disable accounting upon ForceStop

Once ForceStop is set to true, we only return positive inlining advice when it is mandatory; There is no need for further node/edge accounting.

Reviewed By: mtrofin

Differential Revision: https://reviews.llvm.org/D127245

2 years ago[compiler-rt] Fix Mmap on FreeBSD AArch64
Andrew Turner [Wed, 18 May 2022 16:18:49 +0000 (17:18 +0100)]
[compiler-rt] Fix Mmap on FreeBSD AArch64

On FreeBSD AArch64 safestack needs to use __syscall to handle 64 bit arguments

Reviewed by: MaskRay, vitalybuka

Differential Revision: https://reviews.llvm.org/D125901

2 years ago[compiler-rt] Fix the longjmp sp slot on FreeBSD AArch64
Andrew Turner [Tue, 17 May 2022 10:36:48 +0000 (11:36 +0100)]
[compiler-rt] Fix the longjmp sp slot on FreeBSD AArch64

The stack pointer is stored in the second slot in the jump buffer on
AArch64. Use the correct slot value to read this rather than the
following register.

Reviewed by: melver

Differential Revision: https://reviews.llvm.org/D125762

2 years ago[compiler-rt] Add the FreeBSD AArch64 shadow offset
Andrew Turner [Mon, 16 May 2022 16:07:52 +0000 (17:07 +0100)]
[compiler-rt] Add the FreeBSD AArch64 shadow offset

As with 64 bit x86 use an offset in middle of the address space scaled up
to work with the full 48 bit space.

Reviewed by: MaskRay

Differential Revision: https://reviews.llvm.org/D125757

2 years ago[compiler-rt] Add the common FreeBSD AArch64 support
Andrew Turner [Mon, 16 May 2022 15:58:45 +0000 (16:58 +0100)]
[compiler-rt] Add the common FreeBSD AArch64 support

Reviewed by: vitalybuka

Differential Revision: https://reviews.llvm.org/D125756

2 years ago[MSAN] send output to stderr in test: pthread_getaffinity_np.
Kevin Athey [Wed, 8 Jun 2022 21:14:08 +0000 (14:14 -0700)]
[MSAN] send output to stderr in test: pthread_getaffinity_np.

Must send output to stderr to view it.
This will be rolled back when diagnosis is complete.

Depends on: https://reviews.llvm.org/D127320

Differential Revision: https://reviews.llvm.org/D127346

2 years agoAdd llvm's Support lib to the psuedoCXX library
Nathan Lanza [Wed, 8 Jun 2022 21:11:40 +0000 (17:11 -0400)]
Add llvm's Support lib to the psuedoCXX library

This is failing to find `EnableABIBreakingCheck` at link time. Add
Support to provide it here.

Reviewed By: hokein

Differential Revision: https://reviews.llvm.org/D127269

2 years ago[MSAN] Add comment regarding why pthread_getaffinity_np is not supported on Android.
Kevin Athey [Wed, 8 Jun 2022 18:26:17 +0000 (11:26 -0700)]
[MSAN] Add comment regarding why pthread_getaffinity_np is not supported on Android.

Depends on: https://reviews.llvm.org/D127264

Reviewed By: vitalybuka, fmayer

Differential Revision: https://reviews.llvm.org/D127327

2 years agoRevert "[DWARF] Support 'G' in dwarf parser"
Florian Mayer [Wed, 8 Jun 2022 20:53:00 +0000 (13:53 -0700)]
Revert "[DWARF] Support 'G' in dwarf parser"

This reverts commit 4c71c3386c5c79560517a22e75938c9951f8de68.

2 years agoRevert "[ELF] Support 'G' in .eh_frame"
Florian Mayer [Wed, 8 Jun 2022 20:52:38 +0000 (13:52 -0700)]
Revert "[ELF] Support 'G' in .eh_frame"

This reverts commit 40f34fe4a87d5171854b9b65678ef3d9baea5785.

2 years ago[ELF] Support 'G' in .eh_frame
Florian Mayer [Tue, 7 Jun 2022 00:56:22 +0000 (17:56 -0700)]
[ELF] Support 'G' in .eh_frame

Reviewed By: MaskRay, eugenis

Differential Revision: https://reviews.llvm.org/D127148

2 years ago[mlir][sparse] Add complex number reading from files.
bixia1 [Tue, 7 Jun 2022 23:45:34 +0000 (16:45 -0700)]
[mlir][sparse] Add complex number reading from files.

Support complex numbers for Matrix Market Exchange Formats. Add a test case.

Reviewed By: aartbik

Differential Revision: https://reviews.llvm.org/D127138

2 years ago[llvm-cov] Assume repeat architectures for universal binaries
Keith Smiley [Tue, 15 Mar 2022 04:57:38 +0000 (21:57 -0700)]
[llvm-cov] Assume repeat architectures for universal binaries

In the case you pass multiple universal binaries to llvm-cov, assume
that if only 1 architecture is passed, it should be used for all the
passed binaries.

This makes it easier to use multiple multi-arch binaries, since it's
likely very rare that your architectures mismatch significantly if you
also have multiple binaries in a single llvm-cov invocation. If the
architecture is invalid for any of the passed binaries, it will still
fail later.

Differential Revision: https://reviews.llvm.org/D121667

2 years ago[AMDGPU] Regenerate combine-cond-add-sub.ll
Simon Pilgrim [Wed, 8 Jun 2022 20:10:06 +0000 (21:10 +0100)]
[AMDGPU] Regenerate combine-cond-add-sub.ll

2 years agoSwitch links to use https consistently
Aaron Ballman [Wed, 8 Jun 2022 19:53:08 +0000 (15:53 -0400)]
Switch links to use https consistently

The WG14 website was recently updated to support SSL, and we might as
well make use of that.

2 years agoAdd missing entries for Annex F and Annex H to the C status page
Aaron Ballman [Wed, 8 Jun 2022 19:52:06 +0000 (15:52 -0400)]
Add missing entries for Annex F and Annex H to the C status page

2 years ago[DWARF] Support 'G' in dwarf parser
Florian Mayer [Tue, 7 Jun 2022 00:54:56 +0000 (17:54 -0700)]
[DWARF] Support 'G' in dwarf parser

Reviewed By: MaskRay

Differential Revision: https://reviews.llvm.org/D127171

2 years ago[MC] Add 'G' to augmentation string for MTE instrumented functions
Florian Mayer [Fri, 3 Jun 2022 01:05:02 +0000 (18:05 -0700)]
[MC] Add 'G' to augmentation string for MTE instrumented functions

This was agreed on in
https://lists.llvm.org/pipermail/llvm-dev/2020-May/141345.html

The thread proposed two options
* add a character to augmentation string and handle in libuwind
* use a separate personality function.

It was determined that this is the simpler and better option.

This is part of ARM's Aarch64 ABI:
https://github.com/ARM-software/abi-aa/blob/main/aadwarf64/aadwarf64.rst#id22

The next step after this is teaching libunwind to untag when this
augmentation character is set.

Reviewed By: MaskRay, eugenis

Differential Revision: https://reviews.llvm.org/D127007

2 years ago[compiler-rt][test] Restore original symbolize_stack test
Paul Kirth [Wed, 8 Jun 2022 18:59:27 +0000 (18:59 +0000)]
[compiler-rt][test] Restore original symbolize_stack test

In D126580 we updated the test to reflect that there should always
be a full trace. However, some executions do not have symbolizer
information, so we will restore the original test until we can formulate
a more robust test.

Reviewed By: leonardchan

Differential Revision: https://reviews.llvm.org/D127334

2 years ago[JITLink][ELF][AArch64] Implement R_AARCH64_PREL32 and R_AARCH64_PREL64.
Sunho Kim [Wed, 8 Jun 2022 18:13:03 +0000 (11:13 -0700)]
[JITLink][ELF][AArch64] Implement R_AARCH64_PREL32 and R_AARCH64_PREL64.

This patch implements R_AARCH64_PREL64 and R_AARCH64_PREL32 relocations that is
used in eh frame pointers. The test case utlizes obj2yaml tool to create an
artifical eh frame that generates related relocation types.

Reviewed By: lhames

Differential Revision: https://reviews.llvm.org/D127058

2 years ago[CSSPGO][Preinliner] Set default value of sample-profile-inline-limit-max to 3000
Hongtao Yu [Wed, 8 Jun 2022 18:50:19 +0000 (11:50 -0700)]
[CSSPGO][Preinliner] Set default value of sample-profile-inline-limit-max to 3000

The default value of sample-profile-inline-limit-max is defined as 10000 in sampleprofile.cpp. This is too big for cspreinliner which works with assembly size instead of IR size. The value 3000 turns out to be a good tradeoff. Compared to the value 10000, 3000 gives as good performance and code size, but lower build time.

Reviewed By: wenlei, wlei

Differential Revision: https://reviews.llvm.org/D127330

2 years agoRevert "Reland "[NFC][compiler-rt][asan] Unify asan and lsan allocator settings""
Leonard Chan [Wed, 8 Jun 2022 18:54:18 +0000 (11:54 -0700)]
Revert "Reland "[NFC][compiler-rt][asan] Unify asan and lsan allocator settings""

This reverts commit b37d84aa8d59dde2fae7388da5101bf471ec3434.

This broke aarch64 asan builders for fuchsia. I accidentally changed the allocator
settings for fuchsia on aarch64 because the new asan allocator settings use:

```
// AArch64/SANITIZER_CAN_USE_ALLOCATOR64 is only for 42-bit VMA
// so no need to different values for different VMA.
const uptr kAllocatorSpace =  0x10000000000ULL;
const uptr kAllocatorSize  =  0x10000000000ULL;  // 3T.
typedef DefaultSizeClassMap SizeClassMap;
```

rather than reaching the final `#else` which would use fuchsia's lsan config.

2 years ago[APFloat] Fix truncation of certain subnormal numbers
Danila Malyutin [Mon, 6 Jun 2022 17:12:43 +0000 (20:12 +0300)]
[APFloat] Fix truncation of certain subnormal numbers

Certain subnormals would be incorrectly rounded away from zero.

Fixes #55838

Differential Revision: https://reviews.llvm.org/D127140

2 years ago[SystemZ] Fix check for zero size when lowering memcmp.
Kai Nacke [Thu, 2 Jun 2022 17:42:49 +0000 (13:42 -0400)]
[SystemZ] Fix check for zero size when lowering memcmp.

During lowering of memcmp/bcmp, the check for a size of 0 is done
in 2 different ways. In rare cases this can lead to a crash in
SystemZSelectionDAGInfo::EmitTargetCodeForMemcmp(). The root cause
is that SelectionDAGBuilder::visitMemCmpBCmpCall() checks for a
constant int value which is not yet evaluated. When the value is
turned into a SDValue, then the evaluation is done and results in
a ConstantSDNode. But EmitTargetCodeForMemcmp() expects the special
case of 0 length to be handled, which results in an assertion.

The fix is to turn the value into a SDValue, so that both functions
use the same check.

Reviewed By: uweigand

Differential Revision: https://reviews.llvm.org/D126900

2 years ago[lldb] Improve error reporting from TestAppleSimulatorOSType.py
Jonas Devlieghere [Wed, 8 Jun 2022 18:47:03 +0000 (11:47 -0700)]
[lldb] Improve error reporting from TestAppleSimulatorOSType.py

When we can't find a simulator, report the platform and architecture in
the error message.

2 years ago[MLIR][Presburger] subtract: improve redundant constraint detection
Arjun P [Wed, 8 Jun 2022 18:43:43 +0000 (14:43 -0400)]
[MLIR][Presburger] subtract: improve redundant constraint detection

When constraints in the two operands make each other redundant, prefer constraints of the second because this affects the number of sets in the output at each level; reducing these can help prevent exponential blowup.

This is accomplished by adding extra overloads to Simplex::detectRedundant that only scan a subrange of the constraints for redundancy.

Reviewed By: Groverkss

Differential Revision: https://reviews.llvm.org/D127237

2 years ago[cmake] Don't try creating an executable when detecting the linker
Louis Dionne [Tue, 17 May 2022 19:05:05 +0000 (15:05 -0400)]
[cmake] Don't try creating an executable when detecting the linker

On most platforms, the linker detection command that we run ends up being
something like `clang++ -Wl,-v` or `clang++ -Wl,--version`. This usually
fails with a missing reference to `_main` because we don't have any input
file. However, when compiling for a target that is implicitly freestanding,
the invocation actually succeeds and a dummy `a.out` file is created in
the current working directory. This is extremely annoying because it
creates a `a.out` file at the root of the monorepo when running CMake
configuration from the root.

Differential Revision: https://reviews.llvm.org/D125827

2 years ago[compiler-rt][hwasan] Check address tagging mode in InitializeOsSupport on Fuchsia
Leonard Chan [Wed, 8 Jun 2022 00:16:28 +0000 (17:16 -0700)]
[compiler-rt][hwasan] Check address tagging mode in InitializeOsSupport on Fuchsia

Differential Revision: https://reviews.llvm.org/D127262