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Upgrade to regalloc2 0.1.3. (#4157)

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* Upgrade to regalloc2 0.1.3.

This pulls in bytecodealliance/regalloc2#49, which slightly improves
codegen in some cases where a safepoint (for reference-typed values)
occurs in the same liverange as a register-constrained use. For
example, in bytecodealliance/wasmtime#3785, an extra move instruction
appeared and a callee-save register was used (necessitating a more
expensive prologue) because of suboptimal splitting heuristics, which
this PR fixes. The updated RA2 heuristics appear to have no measured
downsides in existing benchmarks and improve the manually-observed
codegen issue.

* Update filetests where regalloc2 improvement altered behavior with reftypes.
This commit is contained in:
Chris Fallin
2022-05-18 11:48:40 -07:00
committed by GitHub
parent ca106e9bcd
commit 02d5edc591
4 changed files with 18 additions and 22 deletions
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cranelift/codegen/Cargo.toml
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@@ -23,7 +23,7 @@ serde = { version = "1.0.94", features = ["derive"], optional = true }
bincode = { version = "1.2.1", optional = true }
gimli = { version = "0.26.0", default-features = false, features = ["write"], optional = true }
smallvec = { version = "1.6.1" }
regalloc2 = { version = "0.1.2", features = ["checker"] }
regalloc2 = { version = "0.1.3", features = ["checker"] }
souper-ir = { version = "2.1.0", 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