c84d6be6f4
This PR propagates "value labels" all the way from CLIF to DWARF metadata on the emitted machine code. The key idea is as follows: - Translate value-label metadata on the input into "value_label" pseudo-instructions when lowering into VCode. These pseudo-instructions take a register as input, denote a value label, and semantically are like a "move into value label" -- i.e., they update the current value (as seen by debugging tools) of the given local. These pseudo-instructions emit no machine code. - Perform a dataflow analysis *at the machine-code level*, tracking value-labels that propagate into registers and into [SP+constant] stack storage. This is a forward dataflow fixpoint analysis where each storage location can contain a *set* of value labels, and each value label can reside in a *set* of storage locations. (Meet function is pairwise intersection by storage location.) This analysis traces value labels symbolically through loads and stores and reg-to-reg moves, so it will naturally handle spills and reloads without knowing anything special about them. - When this analysis converges, we have, at each machine-code offset, a mapping from value labels to some number of storage locations; for each offset for each label, we choose the best location (prefer registers). Note that we can choose any location, as the symbolic dataflow analysis is sound and guarantees that the value at the value_label instruction propagates to all of the named locations. - Then we can convert this mapping into a format that the DWARF generation code (wasmtime's debug crate) can use. This PR also adds the new-backend variant to the gdb tests on CI.
95 lines
3.6 KiB
TOML
95 lines
3.6 KiB
TOML
[package]
|
|
authors = ["The Cranelift Project Developers"]
|
|
name = "cranelift-codegen"
|
|
version = "0.69.0"
|
|
description = "Low-level code generator library"
|
|
license = "Apache-2.0 WITH LLVM-exception"
|
|
documentation = "https://docs.rs/cranelift-codegen"
|
|
repository = "https://github.com/bytecodealliance/wasmtime"
|
|
categories = ["no-std"]
|
|
readme = "README.md"
|
|
keywords = ["compile", "compiler", "jit"]
|
|
build = "build.rs"
|
|
edition = "2018"
|
|
|
|
[dependencies]
|
|
cranelift-codegen-shared = { path = "./shared", version = "0.69.0" }
|
|
cranelift-entity = { path = "../entity", version = "0.69.0" }
|
|
cranelift-bforest = { path = "../bforest", version = "0.69.0" }
|
|
hashbrown = { version = "0.9.1", optional = true }
|
|
target-lexicon = "0.11"
|
|
log = { version = "0.4.6", default-features = false }
|
|
serde = { version = "1.0.94", features = ["derive"], optional = true }
|
|
bincode = { version = "1.2.1", optional = true }
|
|
gimli = { version = "0.23.0", default-features = false, features = ["write"], optional = true }
|
|
smallvec = { version = "1.6.1" }
|
|
thiserror = "1.0.4"
|
|
byteorder = { version = "1.3.2", default-features = false }
|
|
peepmatic = { path = "../peepmatic", optional = true, version = "0.69.0" }
|
|
peepmatic-traits = { path = "../peepmatic/crates/traits", optional = true, version = "0.69.0" }
|
|
peepmatic-runtime = { path = "../peepmatic/crates/runtime", optional = true, version = "0.69.0" }
|
|
regalloc = { version = "0.0.31" }
|
|
souper-ir = { version = "2.1.0", optional = true }
|
|
wast = { version = "32.0.0", optional = true }
|
|
# It is a goal of the cranelift-codegen crate to have minimal external dependencies.
|
|
# Please don't add any unless they are essential to the task of creating binary
|
|
# machine code. Integration tests that need external dependencies can be
|
|
# accomodated in `tests`.
|
|
|
|
[build-dependencies]
|
|
cranelift-codegen-meta = { path = "meta", version = "0.69.0" }
|
|
|
|
[features]
|
|
default = ["std", "unwind"]
|
|
|
|
# The "std" feature enables use of libstd. The "core" feature enables use
|
|
# of some minimal std-like replacement libraries. At least one of these two
|
|
# features need to be enabled.
|
|
std = []
|
|
|
|
# The "core" features enables use of "hashbrown" since core doesn't have
|
|
# a HashMap implementation, and a workaround for Cargo #4866.
|
|
core = ["hashbrown"]
|
|
|
|
# This enables some additional functions useful for writing tests, but which
|
|
# can significantly increase the size of the library.
|
|
testing_hooks = []
|
|
|
|
# This enables unwind info generation functionality.
|
|
unwind = ["gimli"]
|
|
|
|
# ISA targets for which we should build.
|
|
# If no ISA targets are explicitly enabled, the ISA target for the host machine is enabled.
|
|
x86 = []
|
|
arm64 = []
|
|
riscv = []
|
|
x64 = [] # New work-in-progress codegen backend for x86_64 based on the new isel.
|
|
arm32 = [] # Work-in-progress codegen backend for ARM.
|
|
|
|
# Option to enable all architectures.
|
|
all-arch = [
|
|
"x86",
|
|
"arm64",
|
|
"riscv"
|
|
]
|
|
|
|
# For dependent crates that want to serialize some parts of cranelift
|
|
enable-serde = ["serde", "regalloc/enable-serde"]
|
|
|
|
# Allow snapshotting regalloc test cases. Useful only to report bad register
|
|
# allocation failures, or for regalloc.rs developers.
|
|
regalloc-snapshot = ["bincode", "regalloc/enable-serde"]
|
|
|
|
# Recompile our optimizations that are written in the `peepmatic` DSL into a
|
|
# compact finite-state transducer automaton.
|
|
rebuild-peephole-optimizers = ["peepmatic", "peepmatic-traits", "wast"]
|
|
|
|
# Enable the use of `peepmatic`-generated peephole optimizers.
|
|
enable-peepmatic = ["peepmatic-runtime", "peepmatic-traits", "serde"]
|
|
|
|
# Enable support for the Souper harvester.
|
|
souper-harvest = ["souper-ir", "souper-ir/stringify"]
|
|
|
|
[badges]
|
|
maintenance = { status = "experimental" }
|