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authorMatthias Krüger <matthias.krueger@famsik.de>2024-07-11 17:01:41 +0200
committerGitHub <noreply@github.com>2024-07-11 17:01:41 +0200
commitfa3ce50f0bdd7c7bed08e9f6d2ef2b21368aed4f (patch)
tree979d7df218805e6922940a2c999d1037131a55a4 /tests/ui/structs/struct-field-init-syntax.stderr
parentd433f176ef158f8955a8969c123ae20b614d6286 (diff)
parent8a50bcbdceacca60126c085c7cad46aced589c87 (diff)
downloadrust-fa3ce50f0bdd7c7bed08e9f6d2ef2b21368aed4f.tar.gz
rust-fa3ce50f0bdd7c7bed08e9f6d2ef2b21368aed4f.zip
Rollup merge of #127605 - nikic:remove-extern-wasm, r=oli-obk
Remove extern "wasm" ABI

Remove the unstable `extern "wasm"` ABI (`wasm_abi` feature tracked in #83788).

As discussed in https://github.com/rust-lang/rust/pull/127513#issuecomment-2220410679 and following, this ABI is a failed experiment that did not end up being used for anything. Keeping support for this ABI in LLVM 19 would require us to switch wasm targets to the `experimental-mv` ABI, which we do not want to do.

It should be noted that `Abi::Wasm` was internally used for two things: The `-Z wasm-c-abi=legacy` ABI that is still used by default on some wasm targets, and the `extern "wasm"` ABI. Despite both being `Abi::Wasm` internally, they were not the same. An explicit `extern "wasm"` additionally enabled the `+multivalue` feature.

I've opted to remove `Abi::Wasm` in this patch entirely, instead of keeping it as an ABI with only internal usage. Both `-Z wasm-c-abi` variants are now treated as part of the normal C ABI, just with different different treatment in
adjust_for_foreign_abi.
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