Add the script to set up llvm-bolt-wrapper. The intended use is to run NFC
checks manually and automatically on a buildbot.
Reviewed By: rafauler
Differential Revision: https://reviews.llvm.org/D118516
Summary:
- variable 'TotalSize' set but not used
- variable 'TotalCallsTopN' set but not used
- use of bitwise '|' with boolean operands
Reviewed By: maksfb
FBD33911129
clang-10 complains about changed section flags in two tests:
- X86/shrinkwrapping.test
- X86/exceptions-args.test
Fix that by adding the missing flags.
Reviewed By: yota9
Differential Revision: https://reviews.llvm.org/D119014
Only enable --emit-relocs linker option for merge-fdata target if tests are enabled.
Reviewed By: maksfb
Differential Revision: https://reviews.llvm.org/D118580
We can have a scenario where multiple CUs share an abbrev table.
We modify or don't modify one CU, which leads to other CUs having invalid abbrev section.
Example that caused it.
All of CUs shared the same abbrev table. First CU just had compile_unit and sub_program.
It was not modified. Next CU had DW_TAG_lexical_block with
DW_AT_low_pc/DW_AT_high_pc converted to DW_AT_low_pc/DW_AT_ranges.
We used unmodified abbrev section for first and subsequent CUs.
So when parsing subsequent CUs debug info was corrupted.
In this patch we will now duplicate all sections that are modified and are different.
This also means that if .debug_types is present and it shares Abbrev table, and
they usually are, we now can have two Abbrev tables. One for CU that was modified,
and unmodified one for TU.
Reviewed By: maksfb
Differential Revision: https://reviews.llvm.org/D118517
Commit history in chronological order:
[BOLT] llvm-bolt-wrapper: added wrapper for bolt binary matching
Summary:
Wrapper to compare two versions of BOLT to see if they produce the same output
binary given the same input.
(cherry picked from FBD26626137)
[BOLT] llvm-bolt-wrapper: support for no-output tests and heatmap mode
Summary:
- Added an option `skip_binary_cmp` to support invocations that don't output
a binary
- Minor fixes for heatmap mode, timeout, log comparison
- Rearranged in-line config example to be copy-pasteable
(cherry picked from FBD26822016)
[BOLT] llvm-bolt-wrapper: merge stdout/stderr, search for config in script dir
(cherry picked from FBD27529335)
[BOLT] llvm-bolt-wrapper: handle /dev/null
Summary:
Fixed the wrapper to preserve `-o /dev/null` and skip binary matching for such
invocations.
(cherry picked from FBD28013747)
[BOLT] llvm-bolt-wrapper: handle cases where output binary doesn't exist
Summary:
Handle invocations where output binary is not generated (e.g. due to an expected
assertion or exit with BOLT-ERROR) and skip binary comparison in such cases.
(cherry picked from FBD28080158)
[BOLT] llvm-bolt-wrapper: handle boltdiff mode
Summary:
Handle `llvm-boltdiff` invocation similarly to `perf2bolt`
(cherry picked from FBD28080157)
[BOLT] llvm-bolt-wrapper: find section with mismatch
Summary:
For mismatching ELF files, find section with mismatch and print sections table
with highlighted mismatch section.
(cherry picked from FBD28087231)
[BOLT] llvm-bolt-wrapper: ignore-build-id in perf2bolt mode
Summary:
When perf2bolt fails to match build-id from perf output for cmp binary, we need
to use -ignore-build-id option to override the strict checking behavior.
(cherry picked from FBD28087232)
[BOLT] llvm-bolt-wrapper: suppress -bolt-info=0 in heatmap mode
Summary:
Heatmap mode is incompatible with `-bolt-info=0` used to suppress binary
differences. Remove it.
(cherry picked from FBD28087230)
[BOLT] llvm-bolt-wrapper: add config-generator mode
Summary:
llvm-bolt-wrapper config can be generated by the script itself.
It makes the workflow more reliable compared to preparing the config manually.
(cherry picked from FBD28358939)
[BOLT] llvm-bolt-wrapper: fix mismatch reporting
Summary:
1. Fixed header comparison issue where headers were skipped due to
`skip_end == 0` (`lst[:-n]` does not work if n==0).
2. Detect color support while printing mismatching section:
- use bold color if terminal supports ANSI escape codes,
- otherwise print ">" at mismatching section.
3. Remove extra 0x before mismatching offset.
(cherry picked from FBD28691979)
[BOLT] llvm-bolt-wrapper: handle perf2bolt tests with ignore-build-id
Summary:
`ignore-build-id` must be passed not more than once. Account for that.
(cherry picked from FBD29830266)
[BOLT] llvm-bolt-wrapper: fix running subprocesses in parallel
Summary:
The commands were running sequentially due to the use of blocking `communicate`
call, which is needed when stdout/stderr are directed to a pipe.
Fix this behavior by directing the output to a file.
(cherry picked from FBD29951863)
The aarch64 platform has special registers like X0_X1_X2_X3_X4_X5_X6_X7.
Using the downwards propagation this register will become a super
register for all X0..X7 and its super registers which is not right. This
patch replaces the downwards propagation with caching all the aliases using MCRegAliasIterator.
Vladislav Khmelevsky,
Advanced Software Technology Lab, Huawei
Reviewed By: maksfb
Differential Revision: https://reviews.llvm.org/D117394
Since we now re-write .debug_info the DWARF CU Offsets can change.
Just like for .debug_aranges the GDB Index will need to be updated.
Reviewed By: Amir, maksfb
Differential Revision: https://reviews.llvm.org/D118273
This patch reverts patch "DWARFv5 default: Switch bolt tests to use
DWARFv4 since Bolt doesn't support v5 yet" and places the -gdwarf-4 flag
to the global cflags config file.
Reviewed By: Amir
Differential Revision: https://reviews.llvm.org/D118283
This patch adds unit testing support for BOLT. In order to do this we will need at least do this changes on the code level:
* Make createMCPlusBuilder accessible externally
* Remove positional InputFilename argument to bolt utlity sources
And prepare the cmake and lit for the new tests.
Vladislav Khmelevsky,
Advanced Software Technology Lab, Huawei
Reviewed By: maksfb, Amir
Differential Revision: https://reviews.llvm.org/D118271
<memory> is no longer included as a result of 5f290c090a
("Move STLFunctionalExtras out of STLExtras").
Reviewed By: maksfb
Differential Revision: https://reviews.llvm.org/D118064
This patch fixes the removal of unreachable uncondtional branch located
after return instruction.
Vladislav Khmelevsky,
Advanced Software Technology Lab, Huawei
Reviewed By: Amir
Differential Revision: https://reviews.llvm.org/D117677
Summary:
Move the annotation to avoid dynamic memory allocations.
Improves the CPU time of instrumenting a large binary by 1% (+-0.8%, p-value 0.01)
Test Plan: NFC
Reviewers: maksfb
FBD30091656
In case the case the DW_AT_ranges tag already exists for the object the
low pc values won't be updated and will be incorrect in
after-bolt binaries.
Vladislav Khmelevsky,
Advanced Software Technology Lab, Huawei
Differential Revision: https://reviews.llvm.org/D117216
Matching an exact byte offset is fragile if a different version of compiler
is used (e.g. distro clang).
Resolves an issue with running with BOLT_CLANG_EXE + clang-12
Reviewed By: maksfb
Differential Revision: https://reviews.llvm.org/D117440
This is a follow up to Fix size mismatch error with jemalloc.
4243b6582c
Although that fix works it increased memory footprint.
With this patch we go back to original memory footprint.
Reviewed By: maksfb
Differential Revision: https://reviews.llvm.org/D117341
Summary:
Address @smeenai feedback https://reviews.llvm.org/D117061#inline-1122106:
>CMake has if(IN_LIST) now, which you can use instead of the string(FIND)
IN_LIST is available since CMake 3.3 released in 2015.
Reviewed By: smeenai
FBD33590959
The DW_FORM_addr form of highPC address is written in absolute addres,
the data form is written in offset-from-low pc format.
Due to the large test binary the test is prepared separately in
https://github.com/rafaelauler/bolt-tests/pull/8
Vladislav Khmelevsky,
Advanced Software Technology Lab, Huawei
Reviewed By: ayermolo
Differential Revision: https://reviews.llvm.org/D117217
Summary:
Follow the clang-tidy suggestion to replace reset-release with move assignment.
Move assignment's effect for unique_ptr:
> Effects: Transfers ownership from `u` to `*this` as if by calling `reset(u.release())`
followed by an assignment from `std::forward<D>(u.get_deleter())`.
Summary:
Remove X86MCPlusBuilder code that duplicates checks in X86BaseInfo.
Remove isINC and isDEC as redundant.
The new code of `X86MCPlusBuilder::isMacroOpFusionPair` is functionally
equivalent to `X86AsmBackend::isMacroFused`. However, as the method is
declared/defined in X86AsmBackend.cpp and not exported in a header file,
there's no way to use it in BOLT without changes in LLVM code.
(cherry picked from FBD33440373)
Summary:
Remove patterns ineligible for macro-fusion:
- First instruction has a memory destination
This is a temporary commit to align BOLT with LLVM MC interfaces.
(cherry picked from FBD33479340)
Summary:
When building with GCC and linking against jemalloc there is an
assertion when Debug Patches unique pointers are being freed from an std vector.
The base destructor gets invoked which results in type mismatch.
Added virtual destructor to the base class.
(cherry picked from FBD33489259)
Amir Ayupov