[WIP] Use the dummy codegen backend #4648
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bjorn3
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| /// Also disable the MIR pass that inserts an alignment check on every pointer dereference. Miri | ||
| /// does that too, and with a better error message. | ||
| pub const MIRI_DEFAULT_ARGS: &[&str] = &[ | ||
| "-Zcodegen-backend=dummy", |
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The dummy codegen backend is a builtin codegen backend that is only capable of emitting rlibs containing the crate metadata. For every other crate type it emits an error after codegen. This is fine for miri as for --crate-type bin, miri exits before codegen.
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…apkin Allow codegen backends to indicate which crate types they support This way cargo will drop the unsupported crate types for crates that specify multiple crate types. This is a prerequisite for rust-lang/miri#4648.
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…, r=WaffleLapkin Allow codegen backends to indicate which crate types they support This way cargo will drop the unsupported crate types for crates that specify multiple crate types. This is a prerequisite for rust-lang/miri#4648.
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Rollup merge of #148177 - bjorn3:codegen_backend_crate_types, r=WaffleLapkin Allow codegen backends to indicate which crate types they support This way cargo will drop the unsupported crate types for crates that specify multiple crate types. This is a prerequisite for rust-lang/miri#4648.
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…es, r=JonathanBrouwer Handle default features and -Ctarget-features in the dummy backend This prevents a warning about ABI relevant target features not being set on x86 and arm. In addition it is required for miri to report correct features in is_*_feature_detected!() if miri switches to the dummy backend. Required for rust-lang/miri#4648
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…es, r=JonathanBrouwer Handle default features and -Ctarget-features in the dummy backend This prevents a warning about ABI relevant target features not being set on x86 and arm. In addition it is required for miri to report correct features in is_*_feature_detected!() if miri switches to the dummy backend. Required for rust-lang/miri#4648
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…es, r=JonathanBrouwer Handle default features and -Ctarget-features in the dummy backend This prevents a warning about ABI relevant target features not being set on x86 and arm. In addition it is required for miri to report correct features in is_*_feature_detected!() if miri switches to the dummy backend. Required for rust-lang/miri#4648
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Rollup merge of #148253 - bjorn3:dummy_backend_target_features, r=JonathanBrouwer Handle default features and -Ctarget-features in the dummy backend This prevents a warning about ABI relevant target features not being set on x86 and arm. In addition it is required for miri to report correct features in is_*_feature_detected!() if miri switches to the dummy backend. Required for rust-lang/miri#4648
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Almost there. With rust-lang/rust#148177 and rust-lang/rust#148253 merged, the entire miri test suite passes after blessing a single change to a query cycle error. Doctests are broken however due to those requiring a check build for bin crates first, which the dummy codegen backend doesn't yet allow. Opened rust-lang/rust#148299 for this. |
This allows getting rid of all the argument mangling hacks as well as the exported_non_generic_symbols override hack by doing cargo build instead of cargo check. This is also a prerequisite for using native jit mode support in miri that I hope to add to rustc in the future to be used with cg_clif too.
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I hadn't noticed the cargo-miri-test test suite before. It currently has trouble with non-rlib/bin crate types. In particular cargo thinks it needs to build crates only available as cdylib (despite those never being usable) and the |
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Allow check builds with binaries for the dummy codegen backend This is likely the last part necessary for rust-lang/miri#4648. Miri needs to be able to do a regular check build for compile_fail doc tests to work.
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This allows getting rid of all the argument mangling hacks as well as the exported_non_generic_symbols override hack by doing cargo build instead of cargo check. This is also a prerequisite for using native jit mode support in miri that I hope to add to rustc in the future to be used with cg_clif too.