…chenkov

infer linker flavor by linker name if it's sufficiently specific

Fix: `rustc` does not infer `llvm-bitcode-linker` uses `llbc` linker flavor if targeting `nvptx64-nvidia-cuda`.

…kingjubilee

Rollup of 14 pull requests

Successful merges:

 - rust-lang#131651 (Create a generic AVR target: avr-none)
 - rust-lang#136473 (infer linker flavor by linker name if it's sufficiently specific)
 - rust-lang#136608 (Pass through of target features to llvm-bitcode-linker and handling them)
 - rust-lang#136985 (Do not ignore uninhabited types for function-call ABI purposes. (Remove BackendRepr::Uninhabited))
 - rust-lang#137192 (Remove obsolete Windows ThinLTO+TLS workaround)
 - rust-lang#137204 (Clarify MIR dialects and phases)
 - rust-lang#137270 (Fix `*-win7-windows-msvc` target since 26eeac1)
 - rust-lang#137298 (Check signature WF when lowering MIR body)
 - rust-lang#137299 (Simplify `Postorder` customization.)
 - rust-lang#137312 (Update references to cc_detect.rs)
 - rust-lang#137313 (Some codegen_llvm cleanups)
 - rust-lang#137318 (Workaround Cranelift not yet properly supporting vectors smaller than 128bit)
 - rust-lang#137322 (Update docs for default features of wasm targets)
 - rust-lang#137324 (Make x86 QNX target name consistent with other Rust targets)

r? `@ghost`
`@rustbot` modify labels: rollup

…kingjubilee

Rollup of 12 pull requests

Successful merges:

 - rust-lang#131651 (Create a generic AVR target: avr-none)
 - rust-lang#134340 (Stabilize `num_midpoint_signed` feature)
 - rust-lang#136473 (infer linker flavor by linker name if it's sufficiently specific)
 - rust-lang#136608 (Pass through of target features to llvm-bitcode-linker and handling them)
 - rust-lang#136985 (Do not ignore uninhabited types for function-call ABI purposes. (Remove BackendRepr::Uninhabited))
 - rust-lang#137270 (Fix `*-win7-windows-msvc` target since 26eeac1)
 - rust-lang#137312 (Update references to cc_detect.rs)
 - rust-lang#137318 (Workaround Cranelift not yet properly supporting vectors smaller than 128bit)
 - rust-lang#137322 (Update docs for default features of wasm targets)
 - rust-lang#137324 (Make x86 QNX target name consistent with other Rust targets)
 - rust-lang#137338 (skip submodule updating logics on tarballs)
 - rust-lang#137340 (Add a notice about missing GCC sources into source tarballs)

r? `@ghost`
`@rustbot` modify labels: rollup

Rollup merge of rust-lang#136473 - usamoi:infer_linker_hints, r=petrochenkov

infer linker flavor by linker name if it's sufficiently specific

Fix: `rustc` does not infer `llvm-bitcode-linker` uses `llbc` linker flavor if targeting `nvptx64-nvidia-cuda`.