LLVM 19 #139
Draft
LLVM 19 #139
Conversation
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
- New SBF back-end subdirectory and corresponding test directories. - Corresponding changes in ADT, Support, MC, Object, BinaryFormat for new SBF architecture and EM_SBF ELF object. - Corresponding changes in clang to instantiate SBF for Triple::sbf rather than the old BPF back-end, etc. - Corresponding changes in lld to add SBF arch recognition, etc. - Corresponding changes in llvm-readelf to and opt.
…e syntax. (anza-xyz#54) - Update the syntax of every instruction in SBFInstrInfo.td (currently using the asm variants feature to temporarily support both). - Update AsmParser for the new syntax (add new operand, memory, instruction, and directive parse routines). - Add error checking for unresolved 16-bit branch relocations and emit error message for graceful exit (the old BPF back-end crashes) and corresponding lit unit test. - Add new lit unit tests in MC/SBF and MC/Disassembler/SBF to cover disassembly, object emission, and parsing of every single instruction. This is more extensive coverage than existed previously. - Remaster all CodeGen/SBF unit tests accordingly. - A minor TableGen patch was needed to support asm strings containing '|' within variant strings ('|' happens to be the variant separator). The patch is a bit more complex than it otherwise might be in that we currently support both syntaxes to ease the verification (e.g., being able to see and compare each instruction and object code side-by-side within each unit test). After some 'soak time' for the new functionality, I intend to remove the old syntax altogether and otherwise clean-up. We'll also remove the TableGen patch at that time.
Signed-off-by: Lucas Steuernagel <lucas.tnagel@gmail.com>
BTF/CO-RE has been disabled for Solana since: anza-xyz#37 This patch updates related code (and all applicable unit tests) from roughly a year of bitrot. This is in preparation for its possible use in the Move project. Additionally, a few other 14.0.2022-03-02 -> 15.0-2022-08-09 BPF patches were reflected in the SBF back-end (e.g., bugfixes).
EM_SBF files are only accepted by new ELF parser of the RBPF.
Because of a bug in BPF backend ABS64 relocations are incorrectly generated as 64_64 relocations in BPF object files. This temporary works around this for relocations in .debug section to generate debug information addresses correctly.
This change rust-lang@ab4fc87 breaks compilation of compiler-rt library for BPF and SBF targets. For now disabling it.
These tests currently fail on some Macs for some versions of Python, causing our CI to fail. See, e.g., llvm#62403 and references therein.
This PR replaces sub r11, imm by add r11, -imm and is the equivalent of solana-labs/rbpf#488 for the SBF target in LLVM. This is the first task in solana-labs/solana#34250
Patch anza-xyz#54 originally reworked the SBF textual assembly syntax to match the rbpf-style syntax. In order to allow some soak-time, the above patch temporarily supported both the old and new syntax (selectable on the command line or via bespoke assembler directives). A little over a year has passed since then, and all is well with the new syntax, testing, and so forth. The current patch now removes all existing remnants of the old syntax-- including some of the target-independent changes made in the original patch to support both (e.g., a minor TableGen change for variants, some additional command line selector flags, etc). All related unit tests have been updated accordingly.
Following the alterations made in solana-labs/rbpf#489, this PR removes the neg instructions and changes the semantics of sub when one of the operands is an immediate. sub r1, 2 now means r1 = 2 - r1, instead of r1 = r1 - 2. neg r1 is represented as r1 = 0 - r1. This is the second task in solana-labs/solana#34250.
This PR addressed two more items in solana-labs/solana#34250. It removes the little endian byte swap instructions (solana-labs/rbpf#493) and the input buffers related instructions (solana-labs/rbpf#251).
* Remove lddw instruction * Add suggestions
* Fix incorrect obj-dump * Read flag from elf
* Change encoding of callx instruction
* Implement static syscalls * Rename syscall and return * Remove external call from v3 and use pointer value directly
* Include local symbols in the dynamic symbol table * Add tests
* Remove atomic sub lowering * Use v4 for artifact actions
* Split targets * Use sbpf instead of sbf for triples
LucasSte
force-pushed
the
solana-rustc/19.1-2024-12-03
branch
6 times, most recently
from
bdd5ee3 to
a3e5ca8
Compare
LucasSte
force-pushed
the
solana-rustc/19.1-2024-12-03
branch
from
a3e5ca8 to
1c3ec1b
Compare
LucasSte
force-pushed
the
solana-rustc/19.1-2024-12-03
branch
4 times, most recently
from
bdc3666 to
40321df
Compare
LucasSte
force-pushed
the
solana-rustc/19.1-2024-12-03
branch
from
40321df to
d375fa1
Compare
Sign up for free
to join this conversation on GitHub.
Already have an account?
Sign in to comment
Add this suggestion to a batch that can be applied as a single commit.
This suggestion is invalid because no changes were made to the code.
Suggestions cannot be applied while the pull request is closed.
Suggestions cannot be applied while viewing a subset of changes.
Only one suggestion per line can be applied in a batch.
Add this suggestion to a batch that can be applied as a single commit.
Applying suggestions on deleted lines is not supported.
You must change the existing code in this line in order to create a valid suggestion.
Outdated suggestions cannot be applied.
This suggestion has been applied or marked resolved.
Suggestions cannot be applied from pending reviews.
Suggestions cannot be applied on multi-line comments.
Suggestions cannot be applied while the pull request is queued to merge.
Suggestion cannot be applied right now. Please check back later.
No description provided.