platform/upstream/llvm.git
19 months ago[flang] Moving common polymorphic code into utility files
Renaud-K [Wed, 8 Mar 2023 00:09:23 +0000 (16:09 -0800)]
[flang] Moving common polymorphic code into utility files
Differential revision: https://reviews.llvm.org/D145530

19 months ago[libc++][test] Uses qualified std::uint32_t.
Mark de Wever [Tue, 7 Mar 2023 19:02:14 +0000 (20:02 +0100)]
[libc++][test] Uses qualified std::uint32_t.

The module std does not provide c-types in the global namespace. This
means all these types need to be fully qualified. This is a first step
to convert them by using sed.

Since this is an automated conversion other types like uint64_t are kept
as is.

Note that tests in the directory libcxx/test/std/depr/depr.c.headers
should not be converted automatically. This requires manual attention,
there some test require testing uint32_t in the global namespace. These
test should fail when using the std module, and pass when using the
std.compat module.

A similar issue occurs with atomic, atomic_uint32_t is specified as
  using atomic_uint32_t = atomic<uint32_t>; // freestanding
So here too we need to keep the name in the global namespace in the
tests.

Reviewed By: ldionne, #libc

Differential Revision: https://reviews.llvm.org/D145520

19 months ago[CodeGenPrepare] Stop llvm.vscale() -> getelementptr(null, 1) transformation.
Paul Walker [Wed, 8 Mar 2023 15:19:43 +0000 (15:19 +0000)]
[CodeGenPrepare] Stop llvm.vscale() -> getelementptr(null, 1) transformation.

I've pulled this change from D145404 to land in isolation because
I'm concerned the code might be more important than the test
coverage might suggest (NOTE: the code has no test coverage).

19 months agoRevert "[ASan][libcxx] Annotating std::vector with all allocators"
Nikolas Klauser [Wed, 8 Mar 2023 15:38:30 +0000 (16:38 +0100)]
Revert "[ASan][libcxx] Annotating std::vector with all allocators"

This reverts commit a9356a515b5a1a3637eaf5820fc0d2c0dad21a64.

19 months ago[ReleaseNotes] Fix formatting for LLDB changes
Michael Buch [Wed, 8 Mar 2023 15:33:41 +0000 (15:33 +0000)]
[ReleaseNotes] Fix formatting for LLDB changes

19 months ago[compiler-rt][builtins] Define AT_HWCAP2 for AArch64
Xi Ruoyao [Wed, 8 Mar 2023 15:26:57 +0000 (16:26 +0100)]
[compiler-rt][builtins] Define AT_HWCAP2 for AArch64

Without the definition, build fails on AArch64 with

> error: 'AT_HWCAP2' undeclared (first use in this function);
> did you mean 'AT_HWCAP'?

with old Glibc versions.

Differential Revision: https://reviews.llvm.org/D145494

19 months ago[sanitizer] Intercept glibc's argp_parse()
Ilya Leoshkevich [Wed, 8 Mar 2023 14:53:33 +0000 (15:53 +0100)]
[sanitizer] Intercept glibc's argp_parse()

Glibc provides the argp_parse() function for parsing command line
arguments [1].

Indicate that argc/argv are read from and arg_index is written to.
Strictly speaking, we also need to indicate that argp is read from,
but this would require describing its layout, and most people use a
static initializer there, so it's not worth the effort.

[1] https://www.gnu.org/software/libc/manual/html_node/Argp.html

Reviewed By: vitalybuka

Differential Revision: https://reviews.llvm.org/D143330

19 months ago[X86] umax.ll - remove unused arguments. NFC.
Simon Pilgrim [Wed, 8 Mar 2023 15:00:00 +0000 (15:00 +0000)]
[X86] umax.ll - remove unused arguments. NFC.

19 months ago[builtins] Only build float16/bfloat16 code if actually supported
Alex Richardson [Fri, 3 Mar 2023 13:54:08 +0000 (13:54 +0000)]
[builtins] Only build float16/bfloat16 code if actually supported

When building compiler-rt builtins for x86_64 they library will by default
also be built for i386. We unconditionally add the Float16 compile flags
since the check for Float16 support will be done using x86_64 compiler
flags, but i386 does not actually support it. Fix this by moving the
COMPILER_RT_HAS_FLOAT16 and COMPILER_RT_HAS_FLOAT16 checks to a
per-target-architecture check inside the loop (using
`check_c_source_compiles` and `cmake_{push,pop}_check_state`).

Many of the checks in the builtin-config-ix file should probably also be
changed to per-target-arch checks, but so far only the Float16 one has
caused issues. This is an alternative to D136044 which added a special case
for i386 FreeBSD.

Fixes: https://github.com/llvm/llvm-project/issues/57224
Differential Revision: https://reviews.llvm.org/D145237

19 months ago[lldb] Remove unused CrashReasonAsString function
David Spickett [Wed, 8 Mar 2023 10:03:10 +0000 (10:03 +0000)]
[lldb] Remove unused CrashReasonAsString function

The last user was ProcessMessage, which has itself been removed.

Reviewed By: emaste

Differential Revision: https://reviews.llvm.org/D145561

19 months ago[libc++] Add clang-tidy check for version checks
Nikolas Klauser [Fri, 17 Feb 2023 13:01:19 +0000 (14:01 +0100)]
[libc++] Add clang-tidy check for version checks

This check flags code which uses `_LIBCPP_STD_VER` the wrong way, or tries to use `__cplusplus`. It flags cases where we use `_LIBCPP_STD_VER >` instead of `_LIBCPP_STD_VER >=` and where wrong values are used (e.g. `_LIBCPP_STD_VER >= 24`).

Reviewed By: ldionne, #libc

Spies: libcxx-commits

Differential Revision: https://reviews.llvm.org/D144261

19 months ago[Docs] Fix a link for cray-pointer documentation
Shivam Gupta [Wed, 8 Mar 2023 09:03:38 +0000 (14:33 +0530)]
[Docs] Fix a link for cray-pointer documentation

Differential Revision: https://reviews.llvm.org/D145554

19 months ago[flang] Implement atand intrinsic
David Truby [Mon, 27 Feb 2023 16:41:26 +0000 (16:41 +0000)]
[flang] Implement atand intrinsic

This implements the atand intrinsic by performing a multiplication
by 180/pi to the result of a call to atan inline.

Differential Revision: https://reviews.llvm.org/D144885

19 months ago[libc] Add riscv64 fenv implementation and enable the fenv.h functions.
Siva Chandra [Wed, 8 Mar 2023 13:47:14 +0000 (10:47 -0300)]
[libc] Add riscv64 fenv implementation and enable the fenv.h functions.

Reviewed By: mikhail.ramalho

Differential Revision: https://reviews.llvm.org/D145560

19 months agoRe-land [clangd] Add support for missing includes analysis.
Viktoriia Bakalova [Wed, 8 Mar 2023 12:41:05 +0000 (12:41 +0000)]
Re-land [clangd] Add support for missing includes analysis.

This reverts commit fd8c9ef20a9519dccd5b8178b29ed4574285d36f.

Differential Revision: https://reviews.llvm.org/D145577

19 months ago[bazel] Add layering-check
Guillaume Chatelet [Thu, 9 Feb 2023 21:36:59 +0000 (21:36 +0000)]
[bazel] Add layering-check

In the same vein as https://reviews.llvm.org/D141553
Enable the feature globally to ensure layering and catch circular dependencies
(https://llvm.org/docs/CodingStandards.html#library-layering).

Differential Revision: https://reviews.llvm.org/D143678

19 months ago[lldb] Remove unused POSIX ProcessMessage files
David Spickett [Wed, 8 Mar 2023 09:51:45 +0000 (09:51 +0000)]
[lldb] Remove unused POSIX ProcessMessage files

The last use of these was removed in cd443398566b953642ead7c81528ab5b4e211eb9.

Reviewed By: emaste

Differential Revision: https://reviews.llvm.org/D145559

19 months ago[flang][NFC] Fix typo
Valentin Clement [Wed, 8 Mar 2023 12:51:41 +0000 (13:51 +0100)]
[flang][NFC] Fix typo

19 months ago[AArch64] Fix load-insert-zero patterns with i8 and negative offsets.
David Green [Wed, 8 Mar 2023 12:48:21 +0000 (12:48 +0000)]
[AArch64] Fix load-insert-zero patterns with i8 and negative offsets.

These should have been using the LDURBi instructions where the offset is
negative, as reported from the reproducer in D144086.

19 months agoRevert "Re-land [clangd] Add support for missing includes analysis."
Viktoriia Bakalova [Wed, 8 Mar 2023 12:34:15 +0000 (12:34 +0000)]
Revert "Re-land [clangd] Add support for missing includes analysis."

This reverts commit 85a5c17b66768353b7fff717904e42805bb6a547.

19 months agoRevert "Re-land [clangd] Add support for missing includes analysis."
Viktoriia Bakalova [Wed, 8 Mar 2023 12:29:43 +0000 (12:29 +0000)]
Revert "Re-land [clangd] Add support for missing includes analysis."

This reverts commit 7bd56ddaeeb578331d3dfc0c4a2fe2727d0d1861.

19 months agoRevert "Revert "Re-land [clangd] Add support for missing includes analysis.""
Viktoriia Bakalova [Wed, 8 Mar 2023 12:27:17 +0000 (12:27 +0000)]
Revert "Revert "Re-land [clangd] Add support for missing includes analysis.""

This reverts commit 9814b4d07f614e83e7a244f74fc562f2b5cc9b15.

19 months agoRevert "Re-land [clangd] Add support for missing includes analysis."
Viktoriia Bakalova [Wed, 8 Mar 2023 12:24:51 +0000 (12:24 +0000)]
Revert "Re-land [clangd] Add support for missing includes analysis."

This reverts commit 85a5c17b66768353b7fff717904e42805bb6a547.

19 months agoRe-land [clangd] Add support for missing includes analysis.
Viktoriia Bakalova [Wed, 8 Mar 2023 10:58:43 +0000 (10:58 +0000)]
Re-land [clangd] Add support for missing includes analysis.

This reverts commit 2eb5ac99a76dbbf8ac68c538211fabeaa5ac0bfd.

Differential Revision: https://reviews.llvm.org/D145576

19 months ago[libc] Small improvements to libc cmake
Mikhail R. Gadelha [Tue, 7 Mar 2023 12:53:34 +0000 (09:53 -0300)]
[libc] Small improvements to libc cmake

This patch includes:
1. Better error message when cmake finds incompatible triple
2. Added missing header dependencies libc/include/CMakeLists.txt as per
   app.td
3. Removed unused $LLVM_LIBC_INCLUDE_DIRS cmake variable

Reviewed By: sivachandra

Differential Revision: https://reviews.llvm.org/D145496

19 months agoRevert "[IRLinker] Fix mapping of declaration metadata"
Carl Ritson [Wed, 8 Mar 2023 11:42:17 +0000 (20:42 +0900)]
Revert "[IRLinker] Fix mapping of declaration metadata"

This reverts commit be0ef4b95d947a324aaf58373691723a0307822b.
Investigating use after free issue.

19 months ago[AMDGPU] Scheduler: fix RP calculation for a MBB with one successor
Valery Pykhtin [Thu, 27 Oct 2022 06:55:16 +0000 (08:55 +0200)]
[AMDGPU] Scheduler: fix RP calculation for a MBB with one successor

We reuse live registers after tracking one MBB as live-ins to the successor MBB
if the successor is only one but we don't check if the successor has other predecessors.

`A   B`
` \ /`
`  C`

A and B have one successor but C has live-ins defined by A and B and therefore should be
initialized using LIS.

This fixes 83 lit tests out if 420 with EXPENSIVE_CHECK enabled.

Reviewed By: rampitec

Differential Revision: https://reviews.llvm.org/D136918

19 months ago[STLExtras] Use std::get in less_first,less_second to support more types
Florian Hahn [Wed, 8 Mar 2023 11:07:14 +0000 (12:07 +0100)]
[STLExtras] Use std::get in less_first,less_second to support more types

Update less_first,less_second to use std::get to access the first and
second component. This extends support to any type implementing
std::get, like tuples.

Reviewed By: dblaikie

Differential Revision: https://reviews.llvm.org/D145489

19 months agoRe-land [clangd] Add support for missing includes analysis.
Viktoriia Bakalova [Wed, 8 Mar 2023 10:58:43 +0000 (10:58 +0000)]
Re-land [clangd] Add support for missing includes analysis.

This reverts commit 2eb5ac99a76dbbf8ac68c538211fabeaa5ac0bfd.

19 months ago[docs] Document how frequently the staging buildmaster configuration is reconfigured
Alex Bradbury [Wed, 8 Mar 2023 10:48:01 +0000 (10:48 +0000)]
[docs] Document how frequently the staging buildmaster configuration is reconfigured

Differential Revision: https://reviews.llvm.org/D144465

19 months ago[lldb][test][NFC] TestDataFormatterCpp.py: Remove redundant FIXME
Michael Buch [Wed, 8 Mar 2023 10:43:47 +0000 (10:43 +0000)]
[lldb][test][NFC] TestDataFormatterCpp.py: Remove redundant FIXME

This got fixed in D145241

Differential Revision: https://reviews.llvm.org/D145241

19 months ago[VPlan] Check if recipe is in ReplicateRegion for IfPredicateInstr (NFC)
Florian Hahn [Wed, 8 Mar 2023 10:39:43 +0000 (11:39 +0100)]
[VPlan] Check if recipe is in ReplicateRegion for IfPredicateInstr (NFC)

Check if replicate recipe is in a replicate region when considering to
collect predicated instructions. This allows use IsPredicated for
recipes with a mask attached directly in D143865.

Reviewed By: Ayal

Differential Revision: https://reviews.llvm.org/D145322

19 months ago[mlir] Apply ClangTidyLegacy findings (NFC)
Adrian Kuegel [Wed, 8 Mar 2023 09:39:21 +0000 (10:39 +0100)]
[mlir] Apply ClangTidyLegacy findings (NFC)

- 'override' is redundant since the function is already declared 'final'.
- 'virtual' is redundant since the function is already declared 'override'.

19 months ago[InstCombine] Regenerate sub-minmax.ll
Simon Pilgrim [Wed, 8 Mar 2023 09:32:12 +0000 (09:32 +0000)]
[InstCombine] Regenerate sub-minmax.ll

Reduces the superfluous diffs in D145540

19 months ago[AMDGPU] Skip buffer_wbl2 before atomic fence acquire
Stanislav Mekhanoshin [Tue, 7 Mar 2023 20:39:49 +0000 (12:39 -0800)]
[AMDGPU] Skip buffer_wbl2 before atomic fence acquire

Memory models for gfx90a and gfx940 do not require buffer_wbl2
before the fence for acquire ordering, but we do insert the full
release.

Fixes: SWDEV-386785

Differential Revision: https://reviews.llvm.org/D145524

19 months ago[flang] Align same_type_as result to other compilers
Valentin Clement [Wed, 8 Mar 2023 08:50:51 +0000 (09:50 +0100)]
[flang] Align same_type_as result to other compilers

Unallocated unlimited polymorphic entities do not have a dynamic type set
and do not have declared type. The standard notes that the result is
processor dependent when one of the arguments of same_type_as is in this
case. Align the result to other compiler (gfortran, nvfortran).

Reviewed By: jeanPerier, PeteSteinfeld

Differential Revision: https://reviews.llvm.org/D145384

19 months ago[NFC] [C++20] [Modules] Add a test for pr60085
Chuanqi Xu [Wed, 8 Mar 2023 08:40:19 +0000 (16:40 +0800)]
[NFC] [C++20] [Modules] Add a test for pr60085

Close https://github.com/llvm/llvm-project/issues/60085

When I look into pr60085, I finf the issue gone away now surprisingly.
Leave a test for this to prevent it happen again.

19 months ago[mlir][linalg] Refine how contiguous loads are identified
Andrzej Warzynski [Sun, 5 Mar 2023 12:23:17 +0000 (12:23 +0000)]
[mlir][linalg] Refine how contiguous loads are identified

Vectorization of `tensor.extract` using contiguous loads
(`vector.transfer_read`) was introduced in [1]. This patch updates and
refines the existing logic (so that more cases of contiguous can be
identified), as well as adds more tests.

Specifically, contiguous load operations are identified by making sure
that:
  1. non-trailing indices for `tensor.extract` are loop invariant (so,
     e.g., there are no "jumps" from one row to the other between
     iterations),
  2. the trailing index for `tensor.extract` increments by 1 with every
     loop iteration (so that it's always adjacent elements that are
     loaded).
This patch introduces:
  * `isLoopInvariantIdx` for step 1., and
  * `isContiguousLoadIdx` for step 2.
These new methods replace:
  * `isContiguousLoadIdx`, and `isBasedOnIndexOp`.

Both approaches lead to similar end-result (none of the existing tests
required updating). However, with the updated approach, it's much easier
to treat the trailing and non-trailing indices separately and to add
more cases for which contiguous loads can be used.

[1] https://reviews.llvm.org/D141998

Differential Revision: https://reviews.llvm.org/D145385

19 months ago[InstCombine][debuginfo] Update valueCoversEntireFragment for fixed size fragment...
Yeting Kuo [Tue, 21 Feb 2023 11:54:05 +0000 (19:54 +0800)]
[InstCombine][debuginfo] Update valueCoversEntireFragment for fixed size fragment and scalable value.

Update valueCoversEntireFragment to handle new case and add regression test.

Reviewed By: sdesmalen, aprantl

Differential Revision: https://reviews.llvm.org/D144472

19 months agoUse LLVM_USE_SYMLINKS option in install_symlink
Michael Platings [Mon, 6 Mar 2023 22:53:54 +0000 (22:53 +0000)]
Use LLVM_USE_SYMLINKS option in install_symlink

The change to potentially use symlinks on Windows was added in
https://reviews.llvm.org/D99170.

LLVM_USE_SYMLINKS was added more recently in
https://reviews.llvm.org/D135578 and allows specifying at configure time
whether or not symlinks should be created. The benefit of using this
option is it allows building the package on a symlink-capable Windows
machine with symlinks disabled so that the resulting package can be used
on a Windows machine that doesn't support symlinks.

Differential Revision: https://reviews.llvm.org/D145443

19 months ago[PowerPC] Check if the latch block is in the value list for the PHI before get the...
esmeyi [Wed, 8 Mar 2023 07:19:35 +0000 (02:19 -0500)]
[PowerPC] Check if the latch block is in the value list for the PHI before get the incoming value.

Summary: Fixes #60990. There is a crash reported during Running pass 'Prepare loop for ppc preferred instruction forms'. The crash occurs in 32bit PowerPC.

Reviewed By: shchenz

Differential Revision: https://reviews.llvm.org/D145350

19 months ago[IRLinker] Fix mapping of declaration metadata
Carl Ritson [Wed, 8 Mar 2023 06:28:53 +0000 (15:28 +0900)]
[IRLinker] Fix mapping of declaration metadata

Ensure metadata for declarations copied during materialization
is properly mapped if declarations do not become definitions.

Reviewed By: tejohnson

Differential Revision: https://reviews.llvm.org/D145318

19 months ago[NFC] Remove dead code in ExtAddrMode::print checked by coverty tool
Xiang1 Zhang [Wed, 8 Mar 2023 07:00:02 +0000 (15:00 +0800)]
[NFC] Remove dead code in ExtAddrMode::print checked by coverty tool

19 months ago[ADCE] Preserve MemorySSA if only debug instructions are removed
Mikael Holmen [Fri, 3 Mar 2023 13:20:26 +0000 (14:20 +0100)]
[ADCE] Preserve MemorySSA if only debug instructions are removed

As we've seen in
 https://github.com/llvm/llvm-project/issues/58285
throwing away MemorySSA when only debug instructions are removed can lead
to different code when debug info is present or not present.

This is the second attempt at fixing the problem. The first one was
 https://reviews.llvm.org/D145051
which was reverted due to a 15% compile time regression for tramp3d-v4
in NewPM-ReleaseLTO-g.

Differential Revision: https://reviews.llvm.org/D145478

19 months agoRevert "[ADCE] Preserve MemorySSA if only debug instructions are removed"
Mikael Holmen [Wed, 8 Mar 2023 06:34:12 +0000 (07:34 +0100)]
Revert "[ADCE] Preserve MemorySSA if only debug instructions are removed"

This reverts commit db7d8678bcdc440ffd0529f0d970cf10cbcbe984.

19 months ago[ADCE] Preserve MemorySSA if only debug instructions are removed
Mikael Holmen [Fri, 3 Mar 2023 13:20:26 +0000 (14:20 +0100)]
[ADCE] Preserve MemorySSA if only debug instructions are removed

As we've seen in
 https://github.com/llvm/llvm-project/issues/58285
throwing away MemorySSA when only debug instructions are removed can lead
to different code when debug info is present or not present.

This is the second attempt at fixing the problem. The first one was
 https://reviews.llvm.org/D145051
which was reverted due to a 15% compile time regression for tramp3d-v4
in NewPM-ReleaseLTO-g.

19 months ago[fuzzer] Make sure we never delete Fuzzer
Vitaly Buka [Wed, 8 Mar 2023 06:26:07 +0000 (22:26 -0800)]
[fuzzer] Make sure we never delete Fuzzer

19 months agoAdd test for Flags.data_flow_trace
Wu, Yingcong [Wed, 8 Mar 2023 06:04:31 +0000 (22:04 -0800)]
Add test for Flags.data_flow_trace

`CollectDataFlow()` uses `Flags.collect_data_flow` and
`Flags.data_flow_trace` at the same time. But in the null check before
the invocation, only `Flags.collect_data_flow` is checked, and there is
no other method to make sure `Flags.data_flow_trace` is not null, so
adding a null check for `Flags.data_flow_trace`.

Reviewed By: vitalybuka

Differential Revision: https://reviews.llvm.org/D145040

19 months agoUse the right printf format specifiers
Wu, Yingcong [Wed, 8 Mar 2023 05:55:33 +0000 (21:55 -0800)]
Use the right printf format specifiers

Some printf format strings in libfuzzer are using the wrong specifizers, fix in this commit.

Reviewed By: vitalybuka

Differential Revision: https://reviews.llvm.org/D145033

19 months ago[lsan] Initialize uptr value with number not boolean
Bojun Seo [Wed, 8 Mar 2023 05:42:11 +0000 (21:42 -0800)]
[lsan] Initialize uptr value with number not boolean

Reviewed By: vitalybuka

Differential Revision: https://reviews.llvm.org/D145354

19 months ago[test] Remove fprintf argument after D144830
Dave MacLachlan [Wed, 8 Mar 2023 05:38:04 +0000 (21:38 -0800)]
[test] Remove fprintf argument after D144830

Reviewed By: vitalybuka

Differential Revision: https://reviews.llvm.org/D145461

19 months ago[scudo] Do not instantiate Android svelte allocator.
Christopher Ferris [Wed, 8 Mar 2023 05:17:44 +0000 (05:17 +0000)]
[scudo] Do not instantiate Android svelte allocator.

The Android svelte allocator is not used, and will likely require
some configuration and experimentation to find a balanced config.
Leave the svelte config and size map so they can be used as the
basis for the future Android svelte config.

Reviewed By: Chia-hungDuan

Differential Revision: https://reviews.llvm.org/D145525

19 months ago[test/ARCMT/verify.m] Add lit test for `5e035651fd3acbb2645abbe80cae332d90eac78a...
Argyrios Kyrtzidis [Tue, 7 Mar 2023 06:26:52 +0000 (22:26 -0800)]
[test/ARCMT/verify.m] Add lit test for `5e035651fd3acbb2645abbe80cae332d90eac78a` commit

Differential Revision: https://reviews.llvm.org/D145473

19 months ago[RISCV] Add test case for Zfa fli.s miscompile. NFC
Craig Topper [Wed, 8 Mar 2023 03:52:57 +0000 (19:52 -0800)]
[RISCV] Add test case for Zfa fli.s miscompile. NFC

The f32 matching code for fli was hacked to allow the f16 minimum value
to match for the fli.h instruction in the assembler. This was done
because the assembler parses the floating point literal for fli.h,
fli.s, and fli.d as a single precision value.

Unfortunately, this function is also used by CodeGen and causes
this value to be miscompiled for f32.

19 months agoPrecommit tests for max(a,b) nsw/nuw - min(a,b) --> abs(a - b); NFC
Jun Zhang [Wed, 8 Mar 2023 03:22:06 +0000 (11:22 +0800)]
Precommit tests for max(a,b) nsw/nuw - min(a,b) --> abs(a - b); NFC

Signed-off-by: Jun Zhang <jun@junz.org>
19 months agoRevert "[clangd] Add support for missing includes analysis."
Nico Weber [Wed, 8 Mar 2023 03:14:11 +0000 (22:14 -0500)]
Revert "[clangd] Add support for missing includes analysis."

This reverts commit 38b9fb5a129db3e086610d53b534833273c5b4d0.
Breaks tests on Windows, see comments on https://reviews.llvm.org/D143496

19 months ago[flang] Enable target rewrite for int args/rets of bind(c) functions.
Slava Zakharin [Wed, 8 Mar 2023 02:43:42 +0000 (18:43 -0800)]
[flang] Enable target rewrite for int args/rets of bind(c) functions.

BIND(C) subprograms must use the same target ABI as the C processor,
so 1/2-byte int args/rets must be rewritten to use signext attribute.
This change-set also sets fir.bindc_name for the math functions used
during lowering so that they can be fixed up as well (though, currently
none of them needs to be affected).

Differential Revision: https://reviews.llvm.org/D145537

19 months ago[lldb] Fix after __SVCount_t added for AArch64
Alina Sbirlea [Wed, 8 Mar 2023 01:08:36 +0000 (17:08 -0800)]
[lldb] Fix after __SVCount_t added for AArch64

Fix after
https://github.com/llvm/llvm-project/commit/07158c54add927057690aa8c073d35d42eac7006

Differential Revision: https://reviews.llvm.org/D145533

19 months ago[AMDGPU] Extend WorkGroupID* codegen for compute shaders
Christudasan Devadasan [Wed, 1 Mar 2023 07:51:57 +0000 (13:21 +0530)]
[AMDGPU] Extend WorkGroupID* codegen for compute shaders

Currently, the codegen support for llvm.amdgcn.workgroup.id*
intrinsics are enabled only for compute kernels. In addition,
this patch enables their selection for compute shaders on
subtargets that have architected SGPRs.

Differential Revision: https://reviews.llvm.org/D145045

19 months ago[libc++][ranges][NFC] Fix incorrect static asserts in `almost_satisfies_types.h`
Konstantin Varlamov [Wed, 8 Mar 2023 01:51:42 +0000 (17:51 -0800)]
[libc++][ranges][NFC] Fix incorrect static asserts in `almost_satisfies_types.h`

19 months ago[RISCV] Const correct some methods in RISCVOperand. NFC
Craig Topper [Wed, 8 Mar 2023 01:46:14 +0000 (17:46 -0800)]
[RISCV] Const correct some methods in RISCVOperand. NFC

19 months ago[DAGCombiner] don't use the pointer info for widen store
Chen Zheng [Fri, 24 Feb 2023 08:16:50 +0000 (03:16 -0500)]
[DAGCombiner] don't use the pointer info for widen store

The merged store touches memory for other underlying objects, so mapping
the merged store to the first underlying object is not correct. For example
in https://github.com/llvm/llvm-project/issues/60744, the merged store is
not correctly analyzed as dependent with memory operations which are also
part of the merged store.

Fixes #60744

Reviewed By: foad

Differential Revision: https://reviews.llvm.org/D144711

19 months ago[DAGCombiner] add testcase for issue #60744; NFC
Chen Zheng [Fri, 24 Feb 2023 09:24:19 +0000 (04:24 -0500)]
[DAGCombiner] add testcase for issue #60744; NFC

19 months ago[Inliner][NFC] Remove redundant nullptr check
Alex MacLean [Wed, 8 Mar 2023 01:10:15 +0000 (17:10 -0800)]
[Inliner][NFC] Remove redundant nullptr check

Remove the null pointer check on Callee since it is guaranteed to pass by the check
at the top of the loop which continues if Callee is null. While this change is somewhat
trivial, for what it's worth this check triggers Coverity warnings because it implies that
Callee might be null at this point even though it is dereferenced in the preceding code.

Reviewed By: mtrofin

Differential Revision: https://reviews.llvm.org/D145463

19 months ago[lldb] Add missing switch case for SveCount in TypeSystemClang::GetEncoding (NFC)
Jie Fu [Wed, 8 Mar 2023 01:08:42 +0000 (09:08 +0800)]
[lldb] Add missing switch case for SveCount in TypeSystemClang::GetEncoding (NFC)

/data/llvm-project/lldb/source/Plugins/TypeSystem/Clang/TypeSystemClang.cpp:4841:13: error: enumeration value 'SveCount' not handled in switch [-Werror,-Wswitch]
    switch (llvm::cast<clang::BuiltinType>(qual_type)->getKind()) {
            ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
1 error generated.

19 months ago[lld-macho][nfc] Convert more alignTo() to alignToPowerOf2()
Jez Ng [Fri, 3 Mar 2023 18:22:40 +0000 (10:22 -0800)]
[lld-macho][nfc] Convert more alignTo() to alignToPowerOf2()

Reviewed By: #lld-macho, smeenai

Differential Revision: https://reviews.llvm.org/D145261

19 months ago[libc] Add riscv64 syscall implementation.
Siva Chandra [Wed, 8 Mar 2023 00:46:08 +0000 (21:46 -0300)]
[libc] Add riscv64 syscall implementation.

All syscall wrapper functions which have unit tests have been enabled.

Reviewed By: kito-cheng

Differential Revision: https://reviews.llvm.org/D145452

19 months ago[libc][docs] add link to join the discord
Michael Jones [Sat, 4 Mar 2023 00:06:29 +0000 (16:06 -0800)]
[libc][docs] add link to join the discord

Previously we only linked to the channel within the discord.

Differential Revision: https://reviews.llvm.org/D145283

19 months agoMake mlir-opt --show-dialects option print on a single line
Mehdi Amini [Mon, 6 Mar 2023 17:09:51 +0000 (18:09 +0100)]
Make mlir-opt --show-dialects option print on a single line

Differential Revision: https://reviews.llvm.org/D145398

19 months ago[lldb] Copy log files into diagnostic directory
Jonas Devlieghere [Tue, 7 Mar 2023 23:59:30 +0000 (15:59 -0800)]
[lldb] Copy log files into diagnostic directory

This patch copies over log files to the diagnostic directory. The caveat
here is that this only works for logs that are redirected to a file. The
implementation piggybacks of the mapping kept by the debugger. The
advantage is that it's free until you generate the diagnostics, at which
point you only pay the price of copying over the file.

Differential revision: https://reviews.llvm.org/D135631

19 months ago[RISCV] Don't accept '-min', '-inf' or '-nan' in RISCVAsmParser::parseFPImm.
Craig Topper [Tue, 7 Mar 2023 23:33:50 +0000 (15:33 -0800)]
[RISCV] Don't accept '-min', '-inf' or '-nan' in RISCVAsmParser::parseFPImm.

We need to check for identifier before optionally parsing a minus sign.

19 months ago[clang-format][NFC] Remove isCpp11AttributeSpecifier()
Owen Pan [Tue, 7 Mar 2023 23:12:18 +0000 (15:12 -0800)]
[clang-format][NFC] Remove isCpp11AttributeSpecifier()

See https://reviews.llvm.org/D137486#3910570.

19 months ago[clang][DependencyScanner] Cache modulemap stat failures
Michael Spencer [Tue, 7 Mar 2023 22:45:29 +0000 (14:45 -0800)]
[clang][DependencyScanner] Cache modulemap stat failures

Add `module.modulemap` as a file we cache stat failures for as there
are a lot of stats for this file.

Clang currently uses the files it should minimize as a proxy for files
it should cache stat failures for, but really we should cache stat
failures for all paths we don't expect to change during the build.
Unfortunately the VFS API does not know _why_ clang is trying to stat
a path, so we use the filename as a proxy.

Differential Revision: https://reviews.llvm.org/D145526

19 months ago[Fuchsia] Add LLDB options to stage 1 cmake.
Daniel Thornburgh [Tue, 7 Mar 2023 00:02:29 +0000 (16:02 -0800)]
[Fuchsia] Add LLDB options to stage 1 cmake.

LLVM_ENABLE_PROJECTS is automatically forwarded from stage 1 builds to
stage 2 builds, so setting FUCHSIA_ENABLE_LLDB has no effect on
two-stage builds.

Instead, add FUCHSIA_ENABLE_LLDB to the stage one build as well.

This also disables curses and libedit by default for now in both stage1
and stage 2 builds; these should be opt-in.

Reviewed By: haowei

Differential Revision: https://reviews.llvm.org/D145449

19 months ago[lld-macho] Warn on method name collisions from category definitions
Jez Ng [Tue, 7 Mar 2023 19:09:01 +0000 (11:09 -0800)]
[lld-macho] Warn on method name collisions from category definitions

This implements ld64's checks for duplicate method names in categories &
classes.

In addition, this sets us up for implementing Obj-C category merging.
This diff handles the most of the parsing work; what's left is rewriting
those category / class structures.

Numbers for chromium_framework:

             base           diff           difference (95% CI)
  sys_time   2.182 ± 0.027  2.200 ± 0.047  [  -0.2% ..   +1.8%]
  user_time  6.451 ± 0.034  6.479 ± 0.062  [  -0.0% ..   +0.9%]
  wall_time  6.841 ± 0.048  6.885 ± 0.105  [  -0.1% ..   +1.4%]
  samples    33             22

Fixes https://github.com/llvm/llvm-project/issues/54912.

Reviewed By: #lld-macho, thevinster, oontvoo

Differential Revision: https://reviews.llvm.org/D142916

19 months agoAdd a new SBDebugger::SetDestroyCallback() API
Jeffrey Tan [Sat, 4 Feb 2023 01:09:09 +0000 (17:09 -0800)]
Add a new SBDebugger::SetDestroyCallback() API

Adding a new SBDebugger::SetDestroyCallback() API.
This API can be used by any client to query for statistics/metrics before
exiting debug sessions.

Differential Revision: https://reviews.llvm.org/D143520

19 months ago[RISCV] Return MatchOperand_ParseFail instead of MatchOperand_NoMatch from parseFPImm.
Craig Topper [Tue, 7 Mar 2023 22:36:17 +0000 (14:36 -0800)]
[RISCV] Return MatchOperand_ParseFail instead of MatchOperand_NoMatch from parseFPImm.

MatchOperand_NoMatch will fall back to regular operand parsing.
Returning MatchOperand_ParseFail will prevent this.

We also printed our own error message which we should only do for
MatchOperand_ParseFail.

19 months ago[mlir][sparse] Cleaning up code style for genCast
wren romano [Tue, 7 Mar 2023 20:26:20 +0000 (12:26 -0800)]
[mlir][sparse] Cleaning up code style for genCast

Reviewed By: aartbik

Differential Revision: https://reviews.llvm.org/D145432

19 months ago[clang-format][NFC] Remove an obsolete case in parsing concepts
Owen Pan [Tue, 7 Mar 2023 22:34:50 +0000 (14:34 -0800)]
[clang-format][NFC] Remove an obsolete case in parsing concepts

See https://reviews.llvm.org/D142412#4078127.

19 months ago[SROA] Fix bug where RankVectorTypes is used in std::unique
Han Zhu [Thu, 16 Feb 2023 23:19:50 +0000 (15:19 -0800)]
[SROA] Fix bug where RankVectorTypes is used in std::unique

`RankVectorTypes` is a not an equivalence relation so when it is used in
`std::unique`, the behavior is undefined. Create `RankVectorTypesEq` and use
that instead.

19 months ago[scudo] Simplify markFreeBlocks
Chia-hung Duan [Sat, 4 Mar 2023 01:25:18 +0000 (01:25 +0000)]
[scudo] Simplify markFreeBlocks

With memory group, we always mark the free blocks from the same region.
Therefore, we don't need to calculate the offset from base and determine
the region index. Also improve the way we deal with the last block in
the region so that the loop body is simpler.

Reviewed By: cferris

Differential Revision: https://reviews.llvm.org/D143303

19 months ago[mlir][sparse] deduplicate non-unique coordinates when coiterating COO tensors
Peiming Liu [Tue, 7 Mar 2023 17:14:17 +0000 (17:14 +0000)]
[mlir][sparse] deduplicate non-unique coordinates when coiterating COO tensors

Reviewed By: aartbik

Differential Revision: https://reviews.llvm.org/D145518

19 months ago[AArch64] Prefer to fold dup into fmul/fma as opposed to ld1r
David Green [Tue, 7 Mar 2023 21:24:16 +0000 (21:24 +0000)]
[AArch64] Prefer to fold dup into fmul/fma as opposed to ld1r

There is a fold to create LD1DUPpost from dup(load) that can be postinc. If the
dup is used by a "by element" operation such as fmul or fma then it can be
slightly better to fold the dup into the fmul instead, which produces slightly
fast code.

  ld1r { v1.4s }, [x0], #4
  fmul v0.4s, v1.4s, v0.4s
vs
  ldr s1, [x0], #4
  fmul v0.4s, v0.4s, v1.s[0]

This could also be done with integer operations such as smull/umull too, so
long as the load/dup gets correctly combined into the mul operation. Currently
this just operates on foating point types.

Differential Revision: https://reviews.llvm.org/D145184

19 months ago[ControlHeightReduction] Freeze potentially poisonous conditions
Kazu Hirata [Tue, 7 Mar 2023 21:20:21 +0000 (13:20 -0800)]
[ControlHeightReduction] Freeze potentially poisonous conditions

This patch freezes potentially poisonous conditions in conditional
branches so that we do not "move up" conditional branches
"br i1 poison".

Differential Revision: https://reviews.llvm.org/D145008

19 months agoUpdate the C status page for WG14 N2844
Aaron Ballman [Tue, 7 Mar 2023 21:08:24 +0000 (16:08 -0500)]
Update the C status page for WG14 N2844

The proposal is about the behavior of the _Float16,
_Float32, and _Float64 types and whether they
undergo default argument promotions (they don't).

Clang doesn't yet support TS 18661 or the parts
that made it into C2x, so we don't implement this
paper.

19 months agoRecommit "[lldb] Redefine p alias to dwim-print command"
Dave Lee [Sat, 18 Feb 2023 03:53:16 +0000 (19:53 -0800)]
Recommit "[lldb] Redefine p alias to dwim-print command"

Redefine the `p` alias to the `dwim-print` command instead of `expression`.

See https://reviews.llvm.org/D138315 for the introduction of `dwim-print`.

To summarize, `dwim-print` is, as the name suggests, a command for printing. How a value
gets printed, is decided by `dwim-print`. In some cases, `dwim-print` will print values
using the same means as `frame variable` (because it's generally more reliable and
faster that `expression` evaluation), and in other cases `dwim-print` uses the same code
path as `expression`.

This change has been tested in two different ways:

1. Re-aliasing `p` to `dwim-print`, as in this patch
2. Redefinining the `expression` command to `CommandObjectDWIMPrint`

Previously, many of the lldb's tests used `p`, and which meant a test run with `p`
aliases to `dwim-print` was a good way to test `dwim-print`. However most of those tests
were updated to use `expression` explicitly (in anticipation of this change). Now, the
best way to test `dwim-print` is the second approach:

```
diff --git a/lldb/source/Interpreter/CommandInterpreter.cpp b/lldb/source/Interpreter/CommandInterpreter.cpp
index 373c894f34f5..9c943cd30c7c 100644
--- a/lldb/source/Interpreter/CommandInterpreter.cpp
+++ b/lldb/source/Interpreter/CommandInterpreter.cpp
@@ -539,7 +539,7 @@ void CommandInterpreter::LoadCommandDictionary() {
   REGISTER_COMMAND_OBJECT("diagnostics", CommandObjectDiagnostics);
   REGISTER_COMMAND_OBJECT("disassemble", CommandObjectDisassemble);
   REGISTER_COMMAND_OBJECT("dwim-print", CommandObjectDWIMPrint);
-  REGISTER_COMMAND_OBJECT("expression", CommandObjectExpression);
+  REGISTER_COMMAND_OBJECT("expression", CommandObjectDWIMPrint);
   REGISTER_COMMAND_OBJECT("frame", CommandObjectMultiwordFrame);
   REGISTER_COMMAND_OBJECT("gui", CommandObjectGUI);
   REGISTER_COMMAND_OBJECT("help", CommandObjectHelp);
```

When the test suite is run with this change, there are two main categories of test
failures for specific to features that `dwim-print` intentionally doesn't support:

1. Top level expressions (`--top-level`/`-p`)
2. Multiline expressions

In cases where the behavior of `expression` is needed, users can use `expression` at
those times.

Differential Revision: https://reviews.llvm.org/D145189

19 months ago[SLP]Initial support for reshuffling of non-starting buildvector/gather nodes.
Alexey Bataev [Mon, 20 Feb 2023 21:26:11 +0000 (13:26 -0800)]
[SLP]Initial support for reshuffling of non-starting buildvector/gather nodes.

Previously only the very first gather/buildvector node might be probed for reshuffling of other nodes.
But the compiler may do the same for other gather/buildvector nodes too, just need to check the
dependency and postpone the emission of the dependent nodes, if the origin nodes were not emitted yet.

Part of D110978

Differential Revision: https://reviews.llvm.org/D144958

19 months ago[memprof] Update the isRuntime symbolization check.
Snehasish Kumar [Tue, 7 Mar 2023 19:34:57 +0000 (19:34 +0000)]
[memprof] Update the isRuntime symbolization check.

Update the isRuntime check to only match against known memprof filenames
where interceptors are defined. This avoid issues where the path does
not include the directory based on how the runtime was compiled. Also
update the unittest.

Reviewed By: tejohnson

Differential Revision: https://reviews.llvm.org/D145521

19 months ago[libc++] Fixes transitive includes.
Mark de Wever [Tue, 7 Mar 2023 20:13:15 +0000 (21:13 +0100)]
[libc++] Fixes transitive includes.

Since the CI is broken, I didn't investigate why it happened. It just
fixes it.

19 months agoSplit getCompileUnitFor{Data,Code}Address.
Mitch Phillips [Tue, 7 Mar 2023 19:29:49 +0000 (11:29 -0800)]
Split getCompileUnitFor{Data,Code}Address.

Getting compile units for data addresses is much slower, as it often
requires a slow fallback path to walk every DWARF entry, as
data addresses don't fall into the compilation unit ranges.

Most lookups are code addresses, and don't need this logic. Split the
functionality out so that we restore the fast-path behaviour for the
code lookups.

More context at:
https://discourse.llvm.org/t/llvm-symbolizer-has-gotten-extremely-slow/67262

Reviewed By: dblaikie

Differential Revision: https://reviews.llvm.org/D145009

19 months ago[TableGen] Delete support for deprecated positional matching.
James Y Knight [Wed, 8 Feb 2023 15:47:11 +0000 (10:47 -0500)]
[TableGen] Delete support for deprecated positional matching.

After the work in a538d1f13a13 5351878ba196 372240dfe3d5, and
subsequently cleanup of all the in-tree targets, we can now delete the
support for positional operand matching!

This removes three options which could previously be set in a
Target's "InstrInfo" tablegen definition:
- useDeprecatedPositionallyEncodedOperands
- decodePositionallyEncodedOperands
- noNamedPositionallyEncodedOperands

(Also announced at https://discourse.llvm.org/t/tablegen-deleting-deprecated-positional-instruction-operand-matching-support/68524)

Differential Revision: https://reviews.llvm.org/D144210

19 months ago[mlir][python] Capture error diagnostics in exceptions
Rahul Kayaith [Tue, 7 Feb 2023 21:07:50 +0000 (16:07 -0500)]
[mlir][python] Capture error diagnostics in exceptions

This updates most (all?) error-diagnostic-emitting python APIs to
capture error diagnostics and include them in the raised exception's
message:
```
>>> Operation.parse('"arith.addi"() : () -> ()'))
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
mlir._mlir_libs.MLIRError: Unable to parse operation assembly:
error: "-":1:1: 'arith.addi' op requires one result
 note: "-":1:1: see current operation: "arith.addi"() : () -> ()
```

The diagnostic information is available on the exception for users who
may want to customize the error message:
```
>>> try:
...   Operation.parse('"arith.addi"() : () -> ()')
... except MLIRError as e:
...   print(e.message)
...   print(e.error_diagnostics)
...   print(e.error_diagnostics[0].message)
...
Unable to parse operation assembly
[<mlir._mlir_libs._mlir.ir.DiagnosticInfo object at 0x7fed32bd6b70>]
'arith.addi' op requires one result
```

Error diagnostics captured in exceptions aren't propagated to diagnostic
handlers, to avoid double-reporting of errors. The context-level
`emit_error_diagnostics` option can be used to revert to the old
behaviour, causing error diagnostics to be reported to handlers instead
of as part of exceptions.

API changes:
- `Operation.verify` now raises an exception on verification failure,
  instead of returning `false`
- The exception raised by the following methods has been changed to
  `MLIRError`:
  - `PassManager.run`
  - `{Module,Operation,Type,Attribute}.parse`
  - `{RankedTensorType,UnrankedTensorType}.get`
  - `{MemRefType,UnrankedMemRefType}.get`
  - `VectorType.get`
  - `FloatAttr.get`

closes #60595

depends on D144804, D143830

Reviewed By: stellaraccident

Differential Revision: https://reviews.llvm.org/D143869

19 months agoReland "[lldb][TypeSystemClang] Use the CXXFunctionPointerSummaryProvider for member...
Michael Buch [Tue, 7 Mar 2023 15:59:33 +0000 (15:59 +0000)]
Reland "[lldb][TypeSystemClang] Use the CXXFunctionPointerSummaryProvider for member-function pointers"

With this patch member-function pointers are formatted using
`CXXFunctionPointerSummaryProvider`.

This turns,
```
(lldb) v pointer_to_member_func
(void (Foo::*)()) ::pointer_to_member_func = 0x00000000000000000000000100003f94
```
into
```
(lldb) v pointer_to_member_func
(void (Foo::*)()) ::pointer_to_member_func = 0x00000000000000000000000100003f94 (a.out`Foo::member_func() at main.cpp:3)
```

Differential Revision: https://reviews.llvm.org/D145242

19 months agoReland "[lldb][TypeSystemClang] Format pointers to member functions as eFormatHex"
Michael Buch [Tue, 7 Mar 2023 15:52:59 +0000 (15:52 +0000)]
Reland "[lldb][TypeSystemClang] Format pointers to member functions as eFormatHex"

Before this patch, LLDB used to format pointers to members, such as,
```
void (Foo::*pointer_to_member_func)() = &Foo::member_func;
```
as `eFormatBytes`. E.g.,
```
(lldb) v pointer_to_member_func
(void (Foo::*)()) $1 = 94 3f 00 00 01 00 00 00 00 00 00 00 00 00 00 00
```

This patch makes sure we format pointers to member functions the same
way we do regular function pointers.

After this patch we format member pointers as:
```
(lldb) v pointer_to_member_func
(void (Foo::*)()) ::pointer_to_member_func = 0x00000000000000000000000100003f94
```

Differential Revision: https://reviews.llvm.org/D145241

19 months ago[lldb] Respect empty arguments in target.run-args
Alex Langford [Tue, 7 Mar 2023 00:04:35 +0000 (16:04 -0800)]
[lldb] Respect empty arguments in target.run-args

Currently empty arguments are not respected. They are silently dropped
in two places: (1) when extracting them from the target.run-args
setting and (2) when constructing the lldb-argdumper invocation.

(1) is actually a regression from a few years ago. We did not always
drop empty arguments. See 31d97a5c8ab78c619deada0cdb1fcf64021d25dd.

rdar://106279228

Differential Revision: https://reviews.llvm.org/D145450

19 months ago[lldb-vscode] Use `expression` command for completion
Dave Lee [Mon, 6 Mar 2023 23:06:25 +0000 (15:06 -0800)]
[lldb-vscode] Use `expression` command for completion

Change lldb-vscode to use the `expression` command for generating completions, instead
of the `p` alias.

Aliases are user overrideable, and even deletable, but the `expression` command is
unchangeable.

See D141539 where a similar replacement was done to tests.

Differential Revision: https://reviews.llvm.org/D145437

19 months ago[Flang][OpenMP][MLIR][Driver][bbc] Add -fopenmp-is-device flag to Flang -fc1 & the...
Andrew Gozillon [Tue, 7 Mar 2023 18:39:16 +0000 (12:39 -0600)]
[Flang][OpenMP][MLIR][Driver][bbc] Add -fopenmp-is-device flag to Flang -fc1 & the bbc tool, and omp.is_device attribute

Adds the -fopenmp-is-device flag to bbc and Flang's -fc1 (but not flang-new) and in addition adds an omp.is_device attribute onto the module when fopenmp is passed, this is a boolean attribute that is set to false or true dependent on if fopenmp-is-device is specified alongside the fopenmp flag on the commandline when invoking flang or bbc.

Reviewers:
awarzynski
kiranchandramohan

Differential Revision: https://reviews.llvm.org/D144864

19 months ago[clang-tidy][NFC] Fix link in RelaseNotes
Piotr Zegar [Tue, 7 Mar 2023 18:39:45 +0000 (18:39 +0000)]
[clang-tidy][NFC] Fix link in RelaseNotes

19 months ago[ELF][RISCV] Make .sdata and .sbss closer
Fangrui Song [Tue, 7 Mar 2023 18:37:04 +0000 (10:37 -0800)]
[ELF][RISCV] Make .sdata and .sbss closer

GNU ld's internal linker scripts for RISC-V place .sdata and .sbss close.
This makes GP relaxation more profitable.

While here, when .sbss is present, set `__bss_start` to the start of
.sbss instead of .bss, to match GNU ld.

Note: GNU ld's internal linker scripts have symbol assignments and input
section descriptions which are not relevant for modern systems. We only
add things that make sense.

Reviewed By: craig.topper

Differential Revision: https://reviews.llvm.org/D145118

19 months ago[libc++] Addresses LWG3358
Mark de Wever [Sun, 29 Jan 2023 15:40:02 +0000 (16:40 +0100)]
[libc++] Addresses LWG3358

  LWG3358 §[span.cons] is mistaken that to_address can throw

Since last - first has to throw tests are added to make sure this always
happens.

Depends on D142808

Reviewed By: #libc, ldionne

Differential Revision: https://reviews.llvm.org/D142843