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Use new regalloc.rs version with dense vreg->rreg maps.

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This PR updates Cranelift to use the new version of regalloc.rs
(bytecodealliance/regalloc.rs#55) that provides dense vreg->rreg maps to
the `map_reg()` function for each instruction, rather than the earlier
hashmap-based approach.

In one test (regex-rs.wasm), this PR results in a 15% reduction in
memory allocations (1245MB -> 1060MB) as measured by DHAT on `clif-util
wasm` runs.
This commit is contained in:
Chris Fallin
2020-04-27 20:49:59 -07:00
parent 738e2742da
commit be6f060abf
5 changed files with 186 additions and 191 deletions
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2
cranelift/codegen/Cargo.toml
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@@ -24,7 +24,7 @@ gimli = { version = "0.20.0", default-features = false, features = ["write"], op
smallvec = { version = "1.0.0" }
thiserror = "1.0.4"
byteorder = { version = "1.3.2", default-features = false }
regalloc = "0.0.20"
regalloc = "0.0.21"
# 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