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souper-harvest: Do not generate assignments of constants

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It turns out that Souper does not allow a constant to be assigned to a variable,
they may only be used as operands. The 2.0.0 version of the `souper-ir` crate
correctly reflects this. In the `cranelift_codegen::souper_harvest` module, we
need to modify our Souper IR harvester so that it delays converting `iconst` and
`bconst` into Souper IR until their values are used as operands. Finally, some
unit tests in the `peepmatic-souper` crate need some small updates as well.
This commit is contained in:
Nick Fitzgerald
2020-10-15 17:00:02 -07:00
parent 09662fa716
commit f7cf771ee6
5 changed files with 60 additions and 35 deletions
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cranelift/codegen/Cargo.toml
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@@ -29,7 +29,7 @@ peepmatic = { path = "../peepmatic", optional = true, version = "0.68.0" }
peepmatic-traits = { path = "../peepmatic/crates/traits", optional = true, version = "0.68.0" }
peepmatic-runtime = { path = "../peepmatic/crates/runtime", optional = true, version = "0.68.0" }
regalloc = { version = "0.0.31" }
souper-ir = { version = "1", optional = true }
souper-ir = { version = "2.0.0", optional = true }
wast = { version = "28.0.0", 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