platform/upstream/llvm.git
2 years ago[ARM] Remove FeaturePerfMon from armv7-m
David Green [Wed, 12 Jan 2022 09:44:53 +0000 (09:44 +0000)]
[ARM] Remove FeaturePerfMon from armv7-m

FeaturePerfMon relates to the PMU extensions available in armv7-a, and
should not be available in v7-m (it requires loading from a system
register with a mrc). Sink it down a level in the dependency map so that
it isn't present in ARMv7m or HasV8MMainlineOps.

It is also removed from the Neoverse-N2, as it will already be
transitively included.

Differential Revision: https://reviews.llvm.org/D117022

2 years ago[JITLink][AArch64] Add support for splitting eh-frames on AArch64.
Lang Hames [Wed, 12 Jan 2022 09:36:08 +0000 (20:36 +1100)]
[JITLink][AArch64] Add support for splitting eh-frames on AArch64.

This is needed for DWARF eh-frame exception handling on AArch64.

https://github.com/llvm/llvm-project/issues/52921.

Original patch by David Nadlinger <code@klickverbot.at> (thanks David!),
testcase and comments added by me.

2 years ago[flang] Make the `flang` wrapper script check the Bash version
Andrzej Warzynski [Tue, 4 Jan 2022 19:02:23 +0000 (19:02 +0000)]
[flang] Make the `flang` wrapper script check the Bash version

The `flang` wrapper script has been written in a relatively modern
version of Bash and it fails on systems with older versions. This patch
makes the script check the version of Bash being used to run it and
generates an error when unsupported version is used.

This was discussed in more detail in:
  * https://github.com/flang-compiler/f18-llvm-project/issues/1344.
Many thanks to Anthony Cabrera for the suggestion and for identifying
the oldest version of Bash that we can use here.

Differential Revision: https://reviews.llvm.org/D116608

2 years ago[IRBuilder] Migrate add-folding to value-based FoldAdd.
Florian Hahn [Wed, 12 Jan 2022 09:24:46 +0000 (09:24 +0000)]
[IRBuilder] Migrate add-folding to value-based FoldAdd.

Depends on D116935.

Reviewed By: nikic

Differential Revision: https://reviews.llvm.org/D116968

2 years ago[X86][ABI] Pre-commit test for the f80 ABI alignment change. NFC
Phoebe Wang [Fri, 17 Dec 2021 14:30:44 +0000 (22:30 +0800)]
[X86][ABI] Pre-commit test for the f80 ABI alignment change. NFC

2 years ago[extract_symbols.py] Fix line-splitting of tool output.
Simon Tatham [Wed, 12 Jan 2022 09:06:54 +0000 (09:06 +0000)]
[extract_symbols.py] Fix line-splitting of tool output.

Two functions in the `is_32bit_windows` family were retrieving the
output of a tool via `subprocess.check_output`, and then iterating
over it using `for line in output`. But in Python, that gets you the
output one //character// at a time, not a line at a time. So the
regexes that looked for a platform name were never matching.

(This is a mistake that Python makes uniquely easy, because iterating
over a file and over a string have different default behaviour, and
because the element type of a string is still a string so you don't
even get a type mismatch error to warn you about it!)

Reviewed By: michaelplatings

Differential Revision: https://reviews.llvm.org/D117030

2 years ago[mlir][linalg][bufferize] Support std.select bufferization
Matthias Springer [Wed, 12 Jan 2022 08:45:27 +0000 (17:45 +0900)]
[mlir][linalg][bufferize] Support std.select bufferization

This op is an example for how to deal with ops who's OpResult may aliasing with one of multiple OpOperands.

Differential Revision: https://reviews.llvm.org/D116868

2 years ago[GlobalOpt] Drop redundant setExternallyInitialized() call (NFC)
Nikita Popov [Wed, 12 Jan 2022 08:42:58 +0000 (09:42 +0100)]
[GlobalOpt] Drop redundant setExternallyInitialized() call (NFC)

This is part of copyAttributesFrom().

2 years ago[GlobalStatus] Remove unused HasNonInstructionUser member (NFC)
Nikita Popov [Wed, 12 Jan 2022 08:40:54 +0000 (09:40 +0100)]
[GlobalStatus] Remove unused HasNonInstructionUser member (NFC)

This hasn't been used in a long time.

2 years ago[GlobalOpt] Support "stored once" optimization for different types
Nikita Popov [Tue, 11 Jan 2022 17:00:41 +0000 (18:00 +0100)]
[GlobalOpt] Support "stored once" optimization for different types

GlobalOpt can optimize a global with undef initializer and a single
store to put the stored value into the initializer instead. Currently,
this requires the type of the global and the store to match.

This patch extends support to cases with different types (but same
size), in which case we create a new global to replace the old one.

Differential Revision: https://reviews.llvm.org/D117034

2 years ago[clang] Introduce support for disabling warnings in system macros
Carlos Galvez [Fri, 7 Jan 2022 18:45:20 +0000 (18:45 +0000)]
[clang] Introduce support for disabling warnings in system macros

Often we run into situations where we want to ignore
warnings from system headers, but Clang will still
give warnings about the contents of a macro defined
in a system header used in user-code.

Introduce a ShowInSystemMacro option to be able to
specify which warnings we do want to keep raising
warnings for. The current behavior is kept in this patch
(i.e. warnings from system macros are enabled by default).
The decision as to whether this should be an opt-in or opt-out
feature can be made in a separate patch.

To put the feature to test, replace duplicated code for
Wshadow and Wold-style-cast with the SuppressInSystemMacro tag.
Also disable the warning for C++20 designators, fixing #52944.

Differential Revision: https://reviews.llvm.org/D116833

2 years ago[Coroutines] Handle lifetime markers, bitcast and unused instruciton for symmetric...
Chuanqi Xu [Wed, 12 Jan 2022 07:53:49 +0000 (15:53 +0800)]
[Coroutines] Handle lifetime markers, bitcast and unused instruciton for symmetric transfer

This fixes bug49888. The root cause for this is that
simplifyTerminatorLeadingToRet didn't handle lifetime markers well.
Another issue also noted in D116327 is that we deleted some inlined
optimization pass in CoroSplit so that simplifyTerminatorLeadingToRet
need to remove dead instructions by hand.

This patch fixes bug49888 by skipping lifetime markers and bitcast
instruction and removing dead instructions by hand in
simplifyTerminatorLeadingToRet.

Reviewed By: junparser

Differential Revision: https://reviews.llvm.org/D116330

2 years ago[clang][dataflow] Add transfer functions for data members and this pointers
Stanislav Gatev [Tue, 11 Jan 2022 12:15:53 +0000 (12:15 +0000)]
[clang][dataflow] Add transfer functions for data members and this pointers

This is part of the implementation of the dataflow analysis framework.
See "[RFC] A dataflow analysis framework for Clang AST" on cfe-dev.

Reviewed-by: ymandel, xazax.hun
Differential Revision: https://reviews.llvm.org/D117012

2 years agoAdd inliner interface for GPU dialect
Uday Bondhugula [Mon, 27 Dec 2021 10:13:25 +0000 (15:43 +0530)]
Add inliner interface for GPU dialect

Add inliner interface for GPU dialect. The interface marks all GPU
dialect ops legal to inline anywhere.

Differential Revision: https://reviews.llvm.org/D116889

2 years ago[llvm-readobj][XCOFF] dump auxiliary symbols.
Esme-Yi [Wed, 12 Jan 2022 07:18:21 +0000 (07:18 +0000)]
[llvm-readobj][XCOFF] dump auxiliary symbols.

Summary: The patch adds support for dumping auxiliary symbols
in llvm-readobj for XCOFF.

Reviewed By: jhenderson, Higuoxing

Differential Revision: https://reviews.llvm.org/D113825

2 years ago[JITLink][AArch64] Use R-X permissions for the GOT.
Lang Hames [Wed, 12 Jan 2022 06:53:13 +0000 (17:53 +1100)]
[JITLink][AArch64] Use R-X permissions for the GOT.

This consistent with ld64's treatment of the GOT, but the main aim here is a
short-term workaround for a bad interaction between stub code sequences and
memory layout: Stubs use LDRLiteral19 relocations to reference the GOT, but
BasicLayout currently puts RW- segments between R-- and R-X segments -- a large
RW- segment (or a large R-- for that matter) can cause the relocation to fail
with an out-of-range error.

Putting the GOT in R-X fixes this efficiently in practice. A more robust fix
will be to use a longer code sequence to materialize the GOT pointer and then
rewrite the stub to use a shorter sequence where possible.

2 years ago[ORC] Add an ostream operator for ExecutorAddrRange.
Lang Hames [Wed, 12 Jan 2022 04:42:10 +0000 (15:42 +1100)]
[ORC] Add an ostream operator for ExecutorAddrRange.

This makes it easier to print addr ranges in debugging output.

2 years ago[JITLink] Use Section + Offset format for anon symbols in out-of-range errors.
Lang Hames [Wed, 12 Jan 2022 04:41:11 +0000 (15:41 +1100)]
[JITLink] Use Section + Offset format for anon symbols in out-of-range errors.

The previous error message only provided the address of the anonymous symbol.
Knowing the containing section makes the error easier to diagnose at a glance.

2 years ago[lld-macho] Try and fix map-file.s' flakiness
Jez Ng [Wed, 12 Jan 2022 07:00:56 +0000 (23:00 -0800)]
[lld-macho] Try and fix map-file.s' flakiness

After {D117069}, map-file.s seems flaky. It seems that the "Total Write
map file" section always exists, but the "Write map file" sub-section
may or may not be emitted. So we check for the former.

2 years agoRevert "[MLIR][Math] Enable constant folding of ops"
William S. Moses [Wed, 12 Jan 2022 07:00:53 +0000 (02:00 -0500)]
Revert "[MLIR][Math] Enable constant folding of ops"

This reverts commit 2f8b956ab6e63e57fbaa60749c9ba7752b071993.

There is a linker error for mlir-nvidia as seen on
https://lab.llvm.org/buildbot/#/builders/61/builds/19939.

As it's late for me here, I'm oing to rever this for now to be
investigated later.

2 years ago[MLIR][Math] Enable constant folding of ops
William S. Moses [Wed, 12 Jan 2022 05:26:41 +0000 (00:26 -0500)]
[MLIR][Math] Enable constant folding of ops

Enable constant folding of ops within the math dialect, and introduce constant folders for ceil and log2

Reviewed By: mehdi_amini

Differential Revision: https://reviews.llvm.org/D117085

2 years ago[MLIR][LLVM] Add memoryeffect for alloca
William S. Moses [Wed, 12 Jan 2022 05:44:05 +0000 (00:44 -0500)]
[MLIR][LLVM] Add memoryeffect for alloca

Add memory effect for llvm.alloca op

Reviewed By: mehdi_amini

Differential Revision: https://reviews.llvm.org/D117086

2 years ago[DAGCombiner][AArch64] precommit some tests for D116915 NFC
zhongyunde [Wed, 12 Jan 2022 06:40:41 +0000 (14:40 +0800)]
[DAGCombiner][AArch64] precommit some tests for D116915 NFC

In working on D116915 I found that a few tests were needed. I've been
asked to pre-push the tests for that ticket. This should complete the tests
needed for now.

2 years ago[AMDGPU] Do not reserve any VGPR for SGPR spills
Austin Kerbow [Wed, 12 Jan 2022 06:11:17 +0000 (22:11 -0800)]
[AMDGPU] Do not reserve any VGPR for SGPR spills

After the split register allocation changes in eebe841a47cb it is no
longer necessary to reserve a VGPR before RA. This can also create bugs
when IPRA is enabled since we cannot predict that a called function may
not reserve any register if it does not have any SGPR spills. If that
happens those functions may override reserved registers that are
normally callee saved. Added a test to show this.

Fixes: SWDEV-309900

Reviewed By: arsenm

Differential Revision: https://reviews.llvm.org/D115551

2 years ago[NFC] Remove invisible character in comments
Chuanqi Xu [Wed, 12 Jan 2022 06:10:07 +0000 (14:10 +0800)]
[NFC] Remove invisible character in comments

2 years agoRevert "[llvm-libtool-darwin] Print a warning if object file names are repeated"
Shoaib Meenai [Wed, 12 Jan 2022 06:02:59 +0000 (22:02 -0800)]
Revert "[llvm-libtool-darwin] Print a warning if object file names are repeated"

This reverts commit 4993eff3e253a1c04e1a1a2fa5d68f6b33423419.

Tests are failing on Windows: http://45.33.8.238/win/52360/step_11.txt.
We'll need to account for forward slashes vs. backslashes.

2 years ago[BOLT] Update README build instructions
Amir Ayupov [Wed, 12 Jan 2022 05:26:01 +0000 (21:26 -0800)]
[BOLT] Update README build instructions

Mehdi spotted that our build instructions don't make sense in a monorepo:
https://github.com/facebookincubator/BOLT/pull/269.

Reviewed By: maksfb

Differential Revision: https://reviews.llvm.org/D117062

2 years ago[OpenMP][Clang] Allow passing target features in ISA trait for metadirective clause
Saiyedul Islam [Tue, 11 Jan 2022 11:43:31 +0000 (11:43 +0000)]
[OpenMP][Clang] Allow passing target features in ISA trait for metadirective clause

Passing any feature in the device-isa trait which is not supported by the host
was causing a compilation failure.

Differential Revision: https://reviews.llvm.org/D116549

2 years ago[BOLT] README: address @apinski-cavium comment
Amir Aupov [Wed, 12 Jan 2022 05:23:26 +0000 (21:23 -0800)]
[BOLT] README: address @apinski-cavium comment

Address the comment at:
https://github.com/llvm/llvm-project/commit/4c106cfdf7cf7eec861ad3983a3dd9a9e8f3a8ae#r63658159

Reviewed By: maksfb

Differential Revision: https://reviews.llvm.org/D117083

2 years agoUpdate LLVM CMakeFiles to include BOLT
Amir Ayupov [Wed, 12 Jan 2022 04:18:58 +0000 (20:18 -0800)]
Update LLVM CMakeFiles to include BOLT

Add BOLT to the project list enabling its build.

Differential Revision: https://reviews.llvm.org/D117063

2 years ago[M68k][NFC] Rename header guard of M68kSubtarget.h
Jim Lin [Wed, 12 Jan 2022 03:11:54 +0000 (11:11 +0800)]
[M68k][NFC] Rename header guard of M68kSubtarget.h

LLVM_LIB_TARGET_CPU0_M68KSUBTARGET_H -> LLVM_LIB_TARGET_M68K_M68KSUBTARGET_H

2 years ago[M68k][NFC] Add missing #endif comment
Jim Lin [Wed, 12 Jan 2022 03:09:38 +0000 (11:09 +0800)]
[M68k][NFC] Add missing #endif comment

2 years ago[RISCV] Add strictfp support for compares.
Craig Topper [Wed, 12 Jan 2022 04:01:40 +0000 (20:01 -0800)]
[RISCV] Add strictfp support for compares.

This adds support for STRICT_FSETCC(quiet) and STRICT_FSETCCS(signaling).

FEQ matches well to STRICT_FSETCC oeq.
FLT/FLE matches well to STRICT_FSETCCS olt/ole.

Others require commuting operands or multiple instructions.

STRICT_FSETCC olt/ole/ogt/oge/ult/ule/ugt/uge uses FLT/FLE,
but we need to save/restore FFLAGS around them to avoid spurious
exceptions. I've implemented pseudo instructions with a
CustomInserter to insert the save/restore CSR instructions.
Unfortunately, this doesn't honor exceptions for signaling NANs
but I'm not sure if signaling nans are really supported by the
constrained intrinsics.

STRICT_FSETCC one and ueq expand to a pair of FLT instructions
with a save/restore of fflags around each. This could be improved
in the future.

There may be some opportunities to generate better code for strict
comparisons mixed with nonans fast math flags. I've left FIXMEs in
the .td files for that.

Co-Authored-by: ShihPo Hung <shihpo.hung@sifive.com>
Reviewed By: arcbbb

Differential Revision: https://reviews.llvm.org/D116694

2 years ago[NFC][MLGO] Use LazyCallGraph::Node to track functions.
Mircea Trofin [Mon, 10 Jan 2022 19:18:04 +0000 (11:18 -0800)]
[NFC][MLGO] Use LazyCallGraph::Node to track functions.

This avoids the InlineAdvisor carrying the responsibility of deleting
Function objects. We use LazyCallGraph::Node objects instead, which are
stable in memory for the duration of the Module-wide performance of CGSCC
passes started under the same ModuleToPostOrderCGSCCPassAdaptor (which
is the case here)

Differential Revision: https://reviews.llvm.org/D116964

2 years ago[gn build] minor comment tweaks, no behavior change
Nico Weber [Wed, 12 Jan 2022 03:05:41 +0000 (22:05 -0500)]
[gn build] minor comment tweaks, no behavior change

2 years ago[lldb] Specify LLVM target requirements in TestLaunchProcessPosixSpawn
Dave Lee [Wed, 12 Jan 2022 02:58:25 +0000 (18:58 -0800)]
[lldb] Specify LLVM target requirements in TestLaunchProcessPosixSpawn

2 years ago[gn build] (manually) port 85e6e748d426 (llvm/lib/Target/X86/MCA)
Nico Weber [Wed, 12 Jan 2022 02:44:19 +0000 (21:44 -0500)]
[gn build] (manually) port 85e6e748d426 (llvm/lib/Target/X86/MCA)

2 years ago[lld-link] Change config and driver to unique_ptr
Fangrui Song [Wed, 12 Jan 2022 02:31:25 +0000 (18:31 -0800)]
[lld-link] Change config and driver to unique_ptr

Similar to D116143. My x86-64 `lld` is ~5KiB smaller.

Reviewed By: mstorsjo

Differential Revision: https://reviews.llvm.org/D116996

2 years ago[Coroutines] Enhance symmetric transfer for constant CmpInst
Chuanqi Xu [Wed, 12 Jan 2022 02:14:37 +0000 (10:14 +0800)]
[Coroutines] Enhance symmetric transfer for constant CmpInst

This fixes bug52896.

Simply, some symmetric transfer optimization chances get invalided due
to we delete some inlined optimization passes in 822b92a. This would
cause stack-overflow in some situations which should be avoided by the
design of coroutine. This patch tries to fix this by transforming the
constant CmpInst instruction which was done in the deleted passes.

Reviewed By: rjmccall, junparser

Differential Revision: https://reviews.llvm.org/D116327

2 years agoSupport: Extract sys::fs::readNativeFileToEOF() from MemoryBuffer
Duncan P. N. Exon Smith [Tue, 7 Dec 2021 20:42:13 +0000 (12:42 -0800)]
Support: Extract sys::fs::readNativeFileToEOF() from MemoryBuffer

Extract the `readNativeFile()` loop from
`MemoryBuffer::getMemoryBufferForStream()` into `readNativeFileToEOF()`
to allow reuse. The chunk size is configurable; the default of `4*4096`
is exposed as `sys::fs::DefaultReadChunkSize` to allow sizing of
SmallVectors.

There's somewhere I'd like to read a usually-small file without overhead
of a MemoryBuffer; extracting existing logic rather than duplicating it.

Differential Revision: https://reviews.llvm.org/D115397

2 years agoSupport: Avoid SmallVector::set_size() in Unix code
Duncan P. N. Exon Smith [Wed, 8 Dec 2021 01:22:41 +0000 (17:22 -0800)]
Support: Avoid SmallVector::set_size() in Unix code

Replace a `reserve()`/`set_size()` pair with `resize_for_overwrite()`
and `truncate()`. The out parameter also needs a `clear()` call on the
error path.

Differential Revision: https://reviews.llvm.org/D115389

2 years agoSupport: Avoid SmallVector::set_size() in Windows code
Duncan P. N. Exon Smith [Wed, 8 Dec 2021 01:22:42 +0000 (17:22 -0800)]
Support: Avoid SmallVector::set_size() in Windows code

Replace a few `reserve()` / `set_size()` pairs with
`resize_for_overwrite()` / `truncate()` in the platform-specific
code for Windows.

Differential Revision: https://reviews.llvm.org/D115390

2 years agoAST: Avoid using SmallVector::set_size() in UnresolvedSet
Duncan P. N. Exon Smith [Wed, 8 Dec 2021 01:22:36 +0000 (17:22 -0800)]
AST: Avoid using SmallVector::set_size() in UnresolvedSet

Update UnresolvedSet to use (and expose) `SmallVector::truncate()` instead
of `SmallVector::set_size()`. The latter is going to made private in a
future commit to avoid misuse.

Differential Revision: https://reviews.llvm.org/D115386

2 years ago[lld-macho] Initialize separate time trace profiler for mapfile worker
Jez Ng [Wed, 12 Jan 2022 01:45:07 +0000 (17:45 -0800)]
[lld-macho] Initialize separate time trace profiler for mapfile worker

After {D115416}, the "Write map file" event no longer shows up
in the time trace. Each time trace profiler instance is thread-local,
but we had neglected to initialize a separate instance for the mapfile
worker thread.

Reviewed By: keith

Differential Revision: https://reviews.llvm.org/D117069

2 years agoADT: Avoid using SmallVector::set_size() in SmallString
Duncan P. N. Exon Smith [Wed, 8 Dec 2021 01:22:29 +0000 (17:22 -0800)]
ADT: Avoid using SmallVector::set_size() in SmallString

Update `SmallString::append()` to use `resize_for_overwrite()` instead
of `reserve()` followed by `set_size()`.

Differential Revision: https://reviews.llvm.org/D115382

2 years ago[MLIR][SCF] Remove unused arguments to whileop
William S. Moses [Tue, 11 Jan 2022 23:45:17 +0000 (18:45 -0500)]
[MLIR][SCF] Remove unused arguments to whileop

Canonicalize away unused arguments to the before region of a whileOp

Reviewed By: mehdi_amini

Differential Revision: https://reviews.llvm.org/D117059

2 years agoASTMatchers: Avoid using SmallVector::set_size()
Duncan P. N. Exon Smith [Wed, 8 Dec 2021 01:22:34 +0000 (17:22 -0800)]
ASTMatchers: Avoid using SmallVector::set_size()

Update `variadicMatcherDescriptor` to assert on reserved capacity and
to call `emplace_back()` instead of calling `set_size()` and constructing
the element in-place.

Differential Revision: https://reviews.llvm.org/D115379

2 years ago[libc++][test] Move iter_swap into iterator.cust.swap. NFC.
Joe Loser [Tue, 11 Jan 2022 05:43:25 +0000 (00:43 -0500)]
[libc++][test] Move iter_swap into iterator.cust.swap. NFC.

Move `iter_swap.pass.cpp` into a new subdirectory: `iterator.cust.swap`
for symmetry with the neighboring subdirectory `iterator.cust.move`.

Differential Revision: https://reviews.llvm.org/D116992

2 years ago[lld-macho] Rename LazySymbol to LazyArchive. NFC
Fangrui Song [Wed, 12 Jan 2022 00:49:06 +0000 (16:49 -0800)]
[lld-macho] Rename LazySymbol to LazyArchive. NFC

D116913 will add LazyObject. Rename LazySymbol to LazyArchive to avoid confusion
and mirror ELF.

Reviewed By: #lld-macho, Jez Ng

Differential Revision: https://reviews.llvm.org/D116914

2 years ago[MLGO] Add support for multiple training traces per module
Mircea Trofin [Tue, 11 Jan 2022 02:16:04 +0000 (18:16 -0800)]
[MLGO] Add support for multiple training traces per module

This happens in e.g. regalloc, where we trace decisions per function,
but wouldn't want to spew N log files (i.e. one per function). So we
output a key-value association, where the key is an ID for the
sub-module object, and the value is the tensorflow::SequenceExample.

The current relation with protobuf is tenuous, so we're avoiding a
custom message type in favor of using the `Struct` message, but that
requires the values be wire-able strings, hence base64 encoding.

We plan on resolving the protobuf situation shortly, and improve the
encoding of such logs, but this is sufficient for now for setting up
regalloc training.

Differential Revision: https://reviews.llvm.org/D116985

2 years ago[clang][CodeGen][UBSan] VLA size checking for unsigned integer parameter
Adam Magier [Thu, 16 Dec 2021 23:56:43 +0000 (00:56 +0100)]
[clang][CodeGen][UBSan] VLA size checking for unsigned integer parameter

The code generation for the UBSan VLA size check was qualified by a con-
dition that the parameter must be a signed integer, however the C spec
does not make any distinction that only signed integer parameters can be
used to declare a VLA, only qualifying that it must be greater than zero
if it is not a constant.

Reviewed By: rjmccall

Differential Revision: https://reviews.llvm.org/D116048

2 years ago[NFC][MLGO] Use ASSERT_TRUE in TFUtilsTest, where appropriate.
Mircea Trofin [Wed, 12 Jan 2022 00:10:02 +0000 (16:10 -0800)]
[NFC][MLGO] Use ASSERT_TRUE in TFUtilsTest, where appropriate.

2 years ago[LLDB][NativePDB] Add support for inlined functions
Zequan Wu [Sat, 8 Jan 2022 00:32:14 +0000 (16:32 -0800)]
[LLDB][NativePDB] Add support for inlined functions

This adds inline function support to NativePDB by parsing S_INLINESITE records
to retrieve inlinee line info and add them into line table at `ParseLineTable`.

Differential Revision: https://reviews.llvm.org/D116845

2 years ago[NFC] Fixup for comment
Julian Lettner [Tue, 11 Jan 2022 23:34:46 +0000 (15:34 -0800)]
[NFC] Fixup for comment

2 years ago[MLIR][SCF] Canonicalize while statement whose cmp condition is recomputed in the...
William S. Moses [Tue, 11 Jan 2022 20:39:18 +0000 (15:39 -0500)]
[MLIR][SCF] Canonicalize while statement whose cmp condition is recomputed in the after region

Given a while loop whose condition is given by a cmp, don't recomputed the comparison (or its inverse) in the after region, instead use a constant since  the original condition must be true if we branched to the after region.

Reviewed By: mehdi_amini

Differential Revision: https://reviews.llvm.org/D117047

2 years ago[TSan][Darwin] Enable Trace/TraceAlloc unit tests
Julian Lettner [Tue, 11 Jan 2022 23:30:17 +0000 (15:30 -0800)]
[TSan][Darwin] Enable Trace/TraceAlloc unit tests

These tests are now green:
```
  Trace.MultiPart
  Trace.RestoreAccess
  Trace.RestoreMutexLock
  TraceAlloc.FinishedThreadReuse
  TraceAlloc.FinishedThreadReuse2
  TraceAlloc.SingleThread
```

rdar://82107856

2 years ago[libc++] Temporarily disable the in_out_result test on Fuchsia.
Konstantin Varlamov [Tue, 11 Jan 2022 23:04:53 +0000 (15:04 -0800)]
[libc++] Temporarily disable the in_out_result test on Fuchsia.

2 years ago[TSan][Darwin] Mark test UNSUPPORTED for iOS simulator
Julian Lettner [Tue, 11 Jan 2022 22:59:52 +0000 (14:59 -0800)]
[TSan][Darwin] Mark test UNSUPPORTED for iOS simulator

2 years ago[sanitizer_common] Only use NT_GNU_BUILD_ID in sanitizer_linux_libcdep.cpp if supported
Rainer Orth [Tue, 11 Jan 2022 22:50:37 +0000 (23:50 +0100)]
[sanitizer_common] Only use NT_GNU_BUILD_ID in sanitizer_linux_libcdep.cpp if supported

D114294 <https://reviews.llvm.org/D114294> broke the Solaris buildbots:

  /opt/llvm-buildbot/home/solaris11-amd64/clang-solaris11-amd64/llvm/compiler-rt/lib/sanitizer_common/sanitizer_linux_libcdep.cpp:613:29: error: use of undeclared identifier 'NT_GNU_BUILD_ID'
          if (nhdr->n_type == NT_GNU_BUILD_ID && nhdr->n_namesz == kGnuNamesz) {
                              ^

Like D107556 <https://reviews.llvm.org/D107556>, it forgot that
`NT_GNU_BUILD_ID` is an unportable GNU extension.

Fixed by making the code conditional on the definition of the macro.

Tested on `amd64-pc-solaris2.11` and `sparcv9-sun-solaris2.11`.

Differential Revision: https://reviews.llvm.org/D117051

2 years ago[llvm-libtool-darwin] Print a warning if object file names are repeated
Roger Kim [Tue, 11 Jan 2022 22:38:25 +0000 (14:38 -0800)]
[llvm-libtool-darwin] Print a warning if object file names are repeated

Print a warning if `llvm-libtool-darwin` if any of the object
files provided by the user have the same file name.

The tool will now print a warning if there is a name collision across:

* Two object files
* An object file and an object file from within a static library
* Two object files from different static libraries

Here is an example of the error:

```
$ llvm-libtool-darwin -static -o archive.a out.o out.o
error: file 'out.o' was specified multiple times.
in: out.o
in: out.o

$ llvm-libtool-darwin -static -o archive.a out.o
$ llvm-libtool-darwin -static -o combined.a archive.a out.o
error: file 'out.o' was specified multiple times.
in: archive.a
in: out.o
```

This change mimics apple's cctools libtool's behavior which always shows a warning in such cases.

Reviewed By: smeenai

Differential Revision: https://reviews.llvm.org/D113130

2 years ago[NFC][llvm-libtool-darwin] Encapsulate the process of adding a new member in a class
Roger Kim [Tue, 11 Jan 2022 22:37:33 +0000 (14:37 -0800)]
[NFC][llvm-libtool-darwin] Encapsulate the process of adding a new member in a class

Here we are refactoring the code to encapsulate data into classes. This allows
us to avoid passing the same objects through many functions that don't directly
use them. Now, functions that need to access data can do so from the class
state.

Reviewed By: jhenderson, smeenai

Differential Revision: https://reviews.llvm.org/D113127

2 years agoAdd 'eager-checks' as a module parameter to MSAN.
Kevin Athey [Tue, 11 Jan 2022 21:20:12 +0000 (13:20 -0800)]
Add 'eager-checks' as a module parameter to MSAN.

This creates a way to configure MSAN to for eager checks that will be leveraged
by the introduction of a clang flag (-fsanitize-memory-param-retval).

This is redundant with the existing flag: -mllvm -msan-eager-checks.

Reviewed By: vitalybuka

Differential Revision: https://reviews.llvm.org/D116855

2 years ago[libc++] Introduce __fits_in_sso()
Nikolas Klauser [Tue, 4 Jan 2022 16:24:03 +0000 (17:24 +0100)]
[libc++] Introduce __fits_in_sso()

Introduce `__fits_in_sso()` to put the constexpr tests into a central place.

Reviewed By: ldionne, #libc

Spies: libcxx-commits

Differential Revision: https://reviews.llvm.org/D116487

2 years ago[libc++] Add Status page for P2321R2 (Zip)
Nikolas Klauser [Thu, 6 Jan 2022 22:12:55 +0000 (23:12 +0100)]
[libc++] Add Status page for P2321R2 (Zip)

Add a status page for P2321R2

Reviewed By: ldionne, Mordante, #libc

Spies: jloser, libcxx-commits, arphaman

Differential Revision: https://reviews.llvm.org/D116691

2 years ago[libc++] Introduce __debug_db_insert_c()
Nikolas Klauser [Mon, 10 Jan 2022 23:33:35 +0000 (00:33 +0100)]
[libc++] Introduce __debug_db_insert_c()

There are a lot of
```
#if _LIBCPP_DEBUG_LEVEL == 2
    __get_db()->__insert_c(this);
#endif
```

This patch introduces `__debug_db_insert_c()` to put the `#if` in one central place.

Reviewed By: ldionne, #libc

Spies: libcxx-commits

Differential Revision: https://reviews.llvm.org/D116947

2 years ago[clang][#47272] Avoid suggesting deprecated version of a declaration over another...
Markus Böck [Mon, 10 Jan 2022 07:42:45 +0000 (08:42 +0100)]
[clang][#47272] Avoid suggesting deprecated version of a declaration over another in typo correction

Prior to this patch, clang might suggest a deprecated name of a declaration over another name as the only mechanism for resolving two typo corrections referring to the same underlying declaration has previously been an alphabetical sort.

This patch adjusts this resolve by also taking into account whether one of two declarations are deprecated. If the new one is deprecated it may not replace a previous correction with a non-deprecated correction and a previous deprecated correction always gets replaced by a non-deprecated new correction.

Fixes https://github.com/llvm/llvm-project/issues/47272

Differential Revision: https://reviews.llvm.org/D116775

2 years ago[MCA] Switching from conservatively guessing which instructions are
Patrick Holland [Mon, 3 Jan 2022 00:37:14 +0000 (16:37 -0800)]
[MCA] Switching from conservatively guessing which instructions are
memory-barrier instructions to providing targets and developers a convenient
way to explicitly declare which instructions are memory-barriers.

Differential Revision: https://reviews.llvm.org/D116779

2 years ago[mlir][Linalg] Pattern to fuse pad operation with elementwise operations.
MaheshRavishankar [Tue, 11 Jan 2022 21:35:37 +0000 (13:35 -0800)]
[mlir][Linalg] Pattern to fuse pad operation with elementwise operations.

Most convolution operations need explicit padding of the input to
ensure all accesses are inbounds. In such cases, having a pad
operation can be a significant overhead. One way to reduce that
overhead is to try to fuse the pad operation with the producer of its
source.

A sequence

```
linalg.generic -> linalg.pad_tensor
```

can be replaced with

```
linalg.fill -> tensor.extract_slice -> linalg.generic ->
tensor.insert_slice.
```

if the `linalg.generic` has all parallel iterator types.

Differential Revision: https://reviews.llvm.org/D116418

2 years ago[AIX] add the xcoff symbol size for the llvm-nm.
zhijian [Tue, 11 Jan 2022 21:24:43 +0000 (16:24 -0500)]
[AIX] add the xcoff symbol size for the llvm-nm.

Summary:

add the xcoff symbol size for the llvm-nm.

Reviewers: James Henderson
Differential Revision: https://reviews.llvm.org/D113104

2 years agoRevert D109159 : Revert "[amdgpu] Enable selection of `s_cselect_b64`."
David Salinas [Wed, 5 Jan 2022 18:47:32 +0000 (18:47 +0000)]
Revert D109159 : Revert "[amdgpu] Enable selection of `s_cselect_b64`."

This reverts commit 640beb38e7710b939b3cfb3f4c54accc694b1d30.

That commit caused performance degradtion in Quicksilver test QS:sGPU and a functional test failure in (rocPRIM rocprim.device_segmented_radix_sort).
Reverting until we have a better solution to s_cselect_b64 codegen cleanup

Change-Id: Ifc167b3c2dae7a65920676f22a97ba76485f3456

Reviewed By: kzhuravl

Differential Revision: https://reviews.llvm.org/D116686

Change-Id: I1abf49b74a7e2ba0e0205f747a4154a468b9d7f2

2 years agoGlobalISel: Use cloneVirtualRegister in localizer
Matt Arsenault [Tue, 11 Jan 2022 17:56:24 +0000 (12:56 -0500)]
GlobalISel: Use cloneVirtualRegister in localizer

2 years agoAMDGPU/GlobalISel: Regenerate baseline checks to include -NEXT
Matt Arsenault [Tue, 11 Jan 2022 20:28:44 +0000 (15:28 -0500)]
AMDGPU/GlobalISel: Regenerate baseline checks to include -NEXT

2 years ago[InstCombine] Pull out a helper function to simplify upcoming patch [NFC]
Philip Reames [Tue, 11 Jan 2022 21:05:25 +0000 (13:05 -0800)]
[InstCombine] Pull out a helper function to simplify upcoming patch [NFC]

2 years ago[DSE] Seperate malloc+memset -> calloc transform from noop store dedection [NFC]
Philip Reames [Tue, 11 Jan 2022 20:33:44 +0000 (12:33 -0800)]
[DSE] Seperate malloc+memset -> calloc transform from noop store dedection [NFC]

This transformation has nothing to do with whether the store is a noop.  The memset becomes a noop, but only after we replace the malloc with a calloc.

2 years ago[AIX] support xcoff for llvm-nm
zhijian [Tue, 11 Jan 2022 20:53:25 +0000 (15:53 -0500)]
[AIX] support xcoff for llvm-nm

Summary:

add the xcoff symbol type functionality for llvm-nm.

Reviewers: James Henderson
Differential Revision: https://reviews.llvm.org/D112450

2 years ago[NFC][MLGO] Remove the word "inliner" in a generic error message.
Mircea Trofin [Tue, 11 Jan 2022 20:36:16 +0000 (12:36 -0800)]
[NFC][MLGO] Remove the word "inliner" in a generic error message.

2 years agoMerge BOLT into LLVM monorepo
Maksim Panchenko [Tue, 11 Jan 2022 20:35:14 +0000 (12:35 -0800)]
Merge BOLT into LLVM monorepo

Details of the merge are available at llvm-dev.

Mailing-list: https://lists.llvm.org/pipermail/llvm-dev/2022-January/154638.html [llvm-dev] Preparing BOLT for LLVM monorepo

Co-authored-by: Rafael Auler <rafaelauler@fb.com>
2 years ago[DSE] Minor style improvements to calloc formation code [NFC]
Philip Reames [Tue, 11 Jan 2022 20:14:28 +0000 (12:14 -0800)]
[DSE] Minor style improvements to calloc formation code [NFC]

2 years ago[clang] number labels in asm goto strings after tied inputs
Nick Desaulniers [Tue, 11 Jan 2022 19:51:22 +0000 (11:51 -0800)]
[clang] number labels in asm goto strings after tied inputs

I noticed that the following case would compile in Clang but not GCC:
    void *x(void) {
      void *p = &&foo;
      asm goto ("# %0\n\t# %l1":"+r"(p):::foo);
      foo:;
      return p;
    }

Changing the output template above from %l2 would compile in GCC but not
Clang.

This demonstrates that when using tied outputs (say via the "+r" output
constraint), the hidden inputs occur or are numbered BEFORE the labels,
at least with GCC.

In fact, GCC does denote this in its documentation:
https://gcc.gnu.org/onlinedocs/gcc-11.2.0/gcc/Extended-Asm.html#Goto-Labels

> Output operand with constraint modifier ‘+’ is counted as two operands
> because it is considered as one output and one input operand.

For the sake of compatibility, I think it's worthwhile to just make this
change.

It's better to use symbolic names for compatibility (especially now
between released version of Clang that support asm goto with outputs).
ie. %l1 from the above would be %l[foo]. The GCC docs also make this
recommendation.

Also, I cleaned up some cruft in GCCAsmStmt::getNamedOperand. AFAICT,
NumPlusOperands was no longer used, though I couldn't find which commit
didn't clean that up correctly.

Link: https://gcc.gnu.org/bugzilla/show_bug.cgi?id=98096
Link: https://gcc.gnu.org/bugzilla/show_bug.cgi?id=103640
Link: https://gcc.gnu.org/onlinedocs/gcc-11.2.0/gcc/Extended-Asm.html#Goto-Labels
Reviewed By: void

Differential Revision: https://reviews.llvm.org/D115471

2 years agoAccept string literal decay in conditional operator
Elvis Stansvik [Tue, 11 Jan 2022 20:04:27 +0000 (15:04 -0500)]
Accept string literal decay in conditional operator

The cppcoreguidelines-pro-bounds-array-to-pointer-decay check currently
accepts:

const char *b = i ? "foo" : "foobar";

but not

const char *a = i ? "foo" : "bar";

This is because the AST is slightly different in the latter case (see
https://godbolt.org/z/MkHVvs).

This eliminates the inconsistency by making it accept the latter form
as well.

Fixes https://github.com/llvm/llvm-project/issues/31155.

2 years ago[DSE] Generalize store null to calloc allocated memory [NFC-ish]
Philip Reames [Tue, 11 Jan 2022 20:00:42 +0000 (12:00 -0800)]
[DSE] Generalize store null to calloc allocated memory [NFC-ish]

This change removes a direct check for calloc-like allocation functions, and instead handles the generic case where we're storing a constant to constant initialized memory.  This is mostly to remove the call to isCallocLike, but if someone downstream happens to have an initialized alloc which initializes to e.g. -1, this will also kick in for them.  (I don't know of such an example ftr.)

2 years ago[MLIR][LLVM] Add MemRead/MemWrite behavior to llvm store/load/addressof ops
William S. Moses [Tue, 11 Jan 2022 18:33:43 +0000 (13:33 -0500)]
[MLIR][LLVM] Add MemRead/MemWrite behavior to llvm store/load/addressof ops

This patch adds corresponding memory effects to mlir llvm-dialect load/store/addressof ops, which thus enables canonicalizations of those ops (like dead code elimination) that rely on the effect interface

Reviewed By: mehdi_amini

Differential Revision: https://reviews.llvm.org/D117041

2 years ago[HIP] Fix device malloc/free
Yaxun (Sam) Liu [Mon, 10 Jan 2022 17:57:41 +0000 (12:57 -0500)]
[HIP] Fix device malloc/free

ROCm 4.5 device library introduced __ockl_dm_alloc and __ockl_dm_dealloc
for supporting device side malloc/free.

This patch redefines device malloc/free to use these functions.

It also fixes a bug in the wrapper header which incorrectly defines free
with return type void* instead of void.

Reviewed by: Artem Belevich

Differential Revision: https://reviews.llvm.org/D116967

2 years ago[gn build] (manually) port f77d115cc136 more
Nico Weber [Tue, 11 Jan 2022 19:49:08 +0000 (14:49 -0500)]
[gn build] (manually) port f77d115cc136 more

2 years ago[clang][CGStmt] emit i constraint rather than X for asm goto indirect dests
Nick Desaulniers [Tue, 11 Jan 2022 19:32:35 +0000 (11:32 -0800)]
[clang][CGStmt] emit i constraint rather than X for asm goto indirect dests

As suggested in:
https://reviews.llvm.org/D114895#3177794
X will be converted to i by SelectionDAGISEL anyways.

Reviewed By: void, jyknight

Differential Revision: https://reviews.llvm.org/D115311

2 years ago[NFC][SimplifyCFG] Add some more tests for sinking into 'unreachable' block
Roman Lebedev [Tue, 11 Jan 2022 19:18:28 +0000 (22:18 +0300)]
[NFC][SimplifyCFG] Add some more tests for sinking into 'unreachable' block

2 years agoFix bazel build after f77d115cc136585f39d30a78c741eb296f9e804d.
James Y Knight [Tue, 11 Jan 2022 17:55:35 +0000 (17:55 +0000)]
Fix bazel build after f77d115cc136585f39d30a78c741eb296f9e804d.

2 years ago[llvm][test] rewrite callbr to use i rather than X constraint NFC
Nick Desaulniers [Tue, 11 Jan 2022 19:08:48 +0000 (11:08 -0800)]
[llvm][test] rewrite callbr to use i rather than X constraint NFC

In D115311, we're looking to modify clang to emit i constraints rather
than X constraints for callbr's indirect destinations. Prior to doing
so, update all of the existing tests in llvm/ to match.

Reviewed By: void, jyknight

Differential Revision: https://reviews.llvm.org/D115410

2 years ago[CodeGen] Treat ObjC `__unsafe_unretained` and class types as trivial
Akira Hatanaka [Sat, 8 Jan 2022 21:27:28 +0000 (13:27 -0800)]
[CodeGen] Treat ObjC `__unsafe_unretained` and class types as trivial
when generating copy/dispose helper functions

Analyze the block captures just once before generating copy/dispose
block helper functions and honor the inert `__unsafe_unretained`
qualifier. This refactor fixes a bug where captures of ObjC
`__unsafe_unretained` and class types were needlessly retained/released
by the copy/dispose helper functions.

Differential Revision: https://reviews.llvm.org/D116948

2 years agoApply clang-tidy fixes for readability-redundant-control-flow in OpenMPDialect.cpp...
Mehdi Amini [Tue, 11 Jan 2022 00:31:22 +0000 (00:31 +0000)]
Apply clang-tidy fixes for readability-redundant-control-flow in OpenMPDialect.cpp (NFC)

2 years agoFix clang-tidy bugprone-argument-comment that was mixed up
Shafik Yaghmour [Tue, 11 Jan 2022 18:30:32 +0000 (10:30 -0800)]
Fix clang-tidy bugprone-argument-comment that was mixed up

Several of the comments were annotating the wrong argument.

I caught this while reviewing this clean-up: https://github.com/llvm/llvm-project/commit/8afcfbfb8fc1e53023ffac9d9bdc424248d6d2ff

which was changing booleans to use true and false and in the this case the comment and the type looked mismatched.

Differential Revision: https://reviews.llvm.org/D116982

2 years ago[mlir] Fix a missing override warning
Kazu Hirata [Tue, 11 Jan 2022 19:03:22 +0000 (11:03 -0800)]
[mlir] Fix a missing override warning

This patch fixes:

  mlir/lib/Dialect/Tosa/Transforms/TosaOptionalDecompositions.cpp:28:8:
  error: 'runOnFunction' overrides a member function but is not marked
  'override' [-Werror,-Wsuggest-override]

2 years ago[SelectionDAG] treat X constrained labels as i for asm
Nick Desaulniers [Tue, 11 Jan 2022 18:16:33 +0000 (10:16 -0800)]
[SelectionDAG] treat X constrained labels as i for asm

Completely rework how we handle X constrained labels for inline asm.

X should really be treated as i. Then existing tests can be moved to use
i D115410 and clang can just emit i D115311. (D115410 and D115311 are
callbr, but this can be done for label inputs, too).

Coincidentally, this simplification solves an ICE uncovered by D87279
based on assumptions made during D69868.

This is the third approach considered. See also discussions v1 (D114895)
and v2 (D115409).

Reported-by: kernel test robot <lkp@intel.com>
Fixes: https://github.com/ClangBuiltLinux/linux/issues/1512

Reviewed By: void, jyknight

Differential Revision: https://reviews.llvm.org/D115688

2 years ago[mlir][tosa] Allow optional TOSA decompositions to be populated separately
Aaron DeBattista [Tue, 11 Jan 2022 18:16:01 +0000 (10:16 -0800)]
[mlir][tosa] Allow optional TOSA decompositions to be populated separately

Moved all TOSA decomposition patterns so that they can be optionally populated
and used by external rewrites. This avoids decomposing TOSa operations when
backends may benefit from the non-decomposed version.

Reviewed By: rsuderman, mehdi_amini

Differential Revision: https://reviews.llvm.org/D116526

2 years ago[libc++][libc++abi][libunwind] Dedup install path var definitions
John Ericson [Tue, 11 Jan 2022 03:03:21 +0000 (03:03 +0000)]
[libc++][libc++abi][libunwind] Dedup install path var definitions

In D116873 I did this for libunwind prior to defining a new install path
variable. But I think the change is good on its own, and libc++{,abi}
could also use it.

libc++ needed the base header var defined above the conditional part to
use it for the prefi+ed headers in the non-target-specific case. For
consistency, I therefore put the unconditional ones above for all 3
libs, which is why I touched the libunwind code (seeing that it had the
core change already)

Reviewed By: phosek, #libunwind, #libc, #libc_abi, ldionne

Differential Revision: https://reviews.llvm.org/D116988

2 years ago[NFC][LazyCallGraph] Remove check in removeDeadFunction() if graph is empty
Arthur Eubanks [Mon, 13 Dec 2021 21:59:47 +0000 (13:59 -0800)]
[NFC][LazyCallGraph] Remove check in removeDeadFunction() if graph is empty

If we're in removeDeadFunction(), we should have already constructed the call graph.

Differential Revision: https://reviews.llvm.org/D115676

2 years ago[ShrinkWrap] check for PPC's non-callee-saved LR
Nick Desaulniers [Tue, 11 Jan 2022 18:01:25 +0000 (10:01 -0800)]
[ShrinkWrap] check for PPC's non-callee-saved LR

As pointed out in https://reviews.llvm.org/D115688#inline-1108193, we
don't want to sink the save point past an INLINEASM_BR, otherwise
prologepilog may incorrectly sink a prolog past the MBB containing an
INLINEASM_BR and into the wrong MBB.

ShrinkWrap is getting this wrong because LR is not in the list of callee
saved registers. Specifically, ShrinkWrap::useOrDefCSROrFI calls
RegisterClassInfo::getLastCalleeSavedAlias which reads
CalleeSavedAliases which was populated by
RegisterClassInfo::runOnMachineFunction by iterating the list of
MCPhysReg returned from MachineRegisterInfo::getCalleeSavedRegs.

Because PPC's LR is non-allocatable, it's NOT considered callee saved.
Add an interface to TargetRegisterInfo for such a case and use it in
Shrinkwrap to ensure we don't sink a prolog past an INLINEASM or
INLINEASM_BR that clobbers LR.

Reviewed By: jyknight, efriedma, nemanjai, #powerpc

Differential Revision: https://reviews.llvm.org/D116424

2 years ago[mlir][tosa] Relax tosa.apply_scale operations
Rob Suderman [Tue, 11 Jan 2022 17:49:36 +0000 (09:49 -0800)]
[mlir][tosa] Relax tosa.apply_scale operations

Apply scale may operate on vectors, scalars, or tensors during
tiling. Relax the requirements to avoid failures.

Reviewed By: NatashaKnk

Differential Revision: https://reviews.llvm.org/D116981

2 years ago[MLIR][SCF] Simplify scf.if by swapping regions if condition is a not
William S. Moses [Tue, 11 Jan 2022 03:27:14 +0000 (22:27 -0500)]
[MLIR][SCF] Simplify scf.if by swapping regions if condition is a not

Given an if of the form, simplify it by eliminating the not and swapping the regions

scf.if not(c) {
  yield origTrue
} else {
  yield origFalse
}

becomes

scf.if c {
  yield origFalse
} else {
  yield origTrue
}

Reviewed By: mehdi_amini

Differential Revision: https://reviews.llvm.org/D116990

2 years ago[ELF] Add RelocationScanner. NFC
Fangrui Song [Tue, 11 Jan 2022 17:54:53 +0000 (09:54 -0800)]
[ELF] Add RelocationScanner. NFC

Currently the way some relocation-related static functions pass around
states is clumsy. Add a Resolver class to store some states as member
variables.

Advantages:

* Avoid the parameter `InputSectionBase &sec` (this offsets the cost passing around `this` paramemter)
* Avoid the parameter `end` (Mips and PowerPC hacks)
* `config` and `target` can be cached as member variables to reduce global state accesses. (potential speedup because the compiler didn't know `config`/`target` were not changed across function calls)
* If we ever want to reduce if-else costs (e.g. `config->emachine==EM_MIPS` for non-Mips) or introduce parallel relocation scan not handling some tricky arches (PPC/Mips), we can templatize Resolver

`target` isn't used as much as `config`, so I change it to a const reference
during the migration.

There is a minor performance inprovement for elf::scanRelocations.

Reviewed By: ikudrin, peter.smith

Differential Revision: https://reviews.llvm.org/D116881