ca0e8d0a1d
In #3721, we have been discussing what to do about the ARM32 backend in Cranelift. Currently, this backend supports only 32-bit types, which is insufficient for full Wasm-MVP; it's missing other critical bits, like floating-point support; and it has only ever been exercised, AFAIK, via the filetests for the individual CLIF instructions that are implemented. We were very very thankful for the original contribution of this backend, even in its partial state, and we had hoped at the time that we could eventually mature it in-tree until it supported e.g. Wasm and other use-cases. But that hasn't yet happened -- to the blame of no-one, to be clear, we just haven't had a contributor with sufficient time. Unfortunately, the existence of the backend and lack of active maintainer now potentially pose a bit of a burden as we hope to make continuing changes to the backend framework. For example, the ISLE migration, and the use of regalloc2 that it will allow, would need all of the existing lowering patterns in the hand-written ARM32 backend to be rewritten as ISLE rules. Given that we don't currently have the resources to do this, we think it's probably best if we, sadly, for now remove this partial backend. This is not in any way a statement of what we might accept in the future, though. If, in the future, an ARM32 backend updated to our latest codebase with an active maintainer were to appear, we'd be happy to merge it (and likewise for any other architecture!). But for now, this is probably the best path. Thanks again to the original contributor @jmkrauz and we hope that this work can eventually be brought back and reused if someone has the time to do so!
104 lines
3.4 KiB
TOML
104 lines
3.4 KiB
TOML
[package]
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authors = ["The Cranelift Project Developers"]
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name = "cranelift-codegen"
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version = "0.81.0"
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description = "Low-level code generator library"
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license = "Apache-2.0 WITH LLVM-exception"
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documentation = "https://docs.rs/cranelift-codegen"
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repository = "https://github.com/bytecodealliance/wasmtime"
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categories = ["no-std"]
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readme = "README.md"
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keywords = ["compile", "compiler", "jit"]
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build = "build.rs"
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edition = "2018"
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[dependencies]
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cranelift-codegen-shared = { path = "./shared", version = "0.81.0" }
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cranelift-entity = { path = "../entity", version = "0.81.0" }
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cranelift-bforest = { path = "../bforest", version = "0.81.0" }
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hashbrown = { version = "0.9.1", optional = true }
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target-lexicon = "0.12"
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log = { version = "0.4.6", default-features = false }
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serde = { version = "1.0.94", features = ["derive"], optional = true }
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bincode = { version = "1.2.1", optional = true }
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gimli = { version = "0.26.0", default-features = false, features = ["write"], optional = true }
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smallvec = { version = "1.6.1" }
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regalloc = "0.0.34"
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souper-ir = { version = "2.1.0", optional = true }
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# It is a goal of the cranelift-codegen crate to have minimal external dependencies.
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# Please don't add any unless they are essential to the task of creating binary
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# machine code. Integration tests that need external dependencies can be
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# accomodated in `tests`.
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[dev-dependencies]
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criterion = "0.3"
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[build-dependencies]
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cranelift-codegen-meta = { path = "meta", version = "0.81.0" }
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cranelift-isle = { path = "../isle/isle", version = "=0.81.0", optional = true }
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miette = { version = "3", features = ["fancy"], optional = true }
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[features]
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default = ["std", "unwind"]
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# The "std" feature enables use of libstd. The "core" feature enables use
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# of some minimal std-like replacement libraries. At least one of these two
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# features need to be enabled.
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std = []
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# The "core" features enables use of "hashbrown" since core doesn't have
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# a HashMap implementation, and a workaround for Cargo #4866.
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core = ["hashbrown"]
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# This enables some additional functions useful for writing tests, but which
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# can significantly increase the size of the library.
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testing_hooks = []
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# This enables unwind info generation functionality.
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unwind = ["gimli"]
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# ISA targets for which we should build.
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# If no ISA targets are explicitly enabled, the ISA target for the host machine is enabled.
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x86 = []
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arm64 = []
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s390x = []
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# Stub feature that does nothing, for Cargo-features compatibility: the new
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# backend is the default now.
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experimental_x64 = []
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# Option to enable all architectures.
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all-arch = [
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"x86",
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"arm64",
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"s390x"
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]
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# For dependent crates that want to serialize some parts of cranelift
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enable-serde = [
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"serde",
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"regalloc/enable-serde",
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"cranelift-entity/enable-serde",
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]
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# Allow snapshotting regalloc test cases. Useful only to report bad register
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# allocation failures, or for regalloc.rs developers.
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regalloc-snapshot = ["bincode", "regalloc/enable-serde"]
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# Enable support for the Souper harvester.
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souper-harvest = ["souper-ir", "souper-ir/stringify"]
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# Recompile ISLE DSL source files into their generated Rust code.
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rebuild-isle = ["cranelift-isle", "miette", "cranelift-codegen-meta/rebuild-isle"]
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# A hack to skip the ISLE-rebuild logic when testing for determinism
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# with the "Meta deterministic check" CI job.
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completely-skip-isle-for-ci-deterministic-check = []
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[badges]
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maintenance = { status = "experimental" }
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[[bench]]
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name = "x64-evex-encoding"
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harness = false
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