Update and improve rustc_codegen_{llvm,ssa} docs
#80323
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These docs were very out of date and misleading. They even said that they codegen'd the *AST*! For some reason, the `rustc_codegen_ssa::base` docs were exactly identical to the `rustc_codegen_llvm::base` docs. They didn't really make sense, because they had LLVM-specific information even though `rustc_codegen_ssa` is supposed to be somewhat generic. So I removed them as they were misleading.
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@bors r+ rollup |
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📌 Commit 5b32ab6 has been approved by |
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Update and improve `rustc_codegen_{llvm,ssa}` docs
Fixes rust-lang#75342.
These docs were very out of date and misleading. They even said that
they codegen'd the *AST*!
For some reason, the `rustc_codegen_ssa::base` docs were exactly
identical to the `rustc_codegen_llvm::base` docs. They didn't really
make sense, because they had LLVM-specific information even though
`rustc_codegen_ssa` is supposed to be somewhat generic. So I removed
them as they were misleading.
r? `@pnkfelix` maybe?
This was referenced Dec 31, 2020
GuillaumeGomez
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Dec 31, 2020
Update and improve `rustc_codegen_{llvm,ssa}` docs
Fixes rust-lang#75342.
These docs were very out of date and misleading. They even said that
they codegen'd the *AST*!
For some reason, the `rustc_codegen_ssa::base` docs were exactly
identical to the `rustc_codegen_llvm::base` docs. They didn't really
make sense, because they had LLVM-specific information even though
`rustc_codegen_ssa` is supposed to be somewhat generic. So I removed
them as they were misleading.
r? ```@pnkfelix``` maybe?
bors
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that referenced
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Jan 1, 2021
Rollup of 8 pull requests Successful merges: - rust-lang#80323 (Update and improve `rustc_codegen_{llvm,ssa}` docs) - rust-lang#80368 (rustdoc: Render visibilities succinctly) - rust-lang#80514 (Fix broken ./x.py install) - rust-lang#80519 (Take type defaults into account in suggestions to reorder generic parameters) - rust-lang#80526 (Update LLVM) - rust-lang#80532 (remove unnecessary trailing semicolon from bootstrap) - rust-lang#80548 (FIx ICE on wf check for foreign fns) - rust-lang#80551 (support pattern as const parents in type_of) Failed merges: - rust-lang#80547 (In which we start to parse const generics defaults) r? `@ghost` `@rustbot` modify labels: rollup
camelid
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Jan 23, 2021
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| //! * There's no way to find out the `Ty` type of a `Value`. Doing so | ||
| //! would be "trying to get the eggs out of an omelette" (credit: | ||
| //! pcwalton). You can, instead, find out its `llvm::Type` by calling `val_ty`, | ||
| //! but one `llvm::Type` corresponds to many `Ty`s; for instance, `tup(int, int, | ||
| //! int)` and `rec(x=int, y=int, z=int)` will have the same `llvm::Type`. |
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Wow, I was just looking through what rustc looked like many years ago, and noticed that this comment was originally introduced 10 years ago (!!) in dba9cae as:
// * There's no way to find out the ty::t type of a ValueRef. Doing so
// would be "trying to get the eggs out of an omelette" (credit:
// pcwalton). You can, instead, find out its TypeRef by calling val_ty,
// but many TypeRefs correspond to one ty::t; for instance, tup(int, int,
// int) and rec(x=int, y=int, z=int) will have the same TypeRef.Quite some software archaeology there!
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Fixes #75342.
These docs were very out of date and misleading. They even said that
they codegen'd the AST!
For some reason, the
rustc_codegen_ssa::basedocs were exactlyidentical to the
rustc_codegen_llvm::basedocs. They didn't reallymake sense, because they had LLVM-specific information even though
rustc_codegen_ssais supposed to be somewhat generic. So I removedthem as they were misleading.
r? @pnkfelix maybe?