Couple of changes to run rustc in miri

This is not the full set of patches required to run rustc in miri, but it is the fast majority of the changes to rustc itself. There is also a change to the jobserver crate necessary and on arm64 a change to the memchr crate. Running rustc in miri has already found some UB: rust-lang#136579

cc rust-lang#135870 (comment)

…kingjubilee

Rollup of 9 pull requests

Successful merges:

 - rust-lang#135439 (Make `-O` mean `OptLevel::Aggressive`)
 - rust-lang#136193 (Implement pattern type ffi checks)
 - rust-lang#136235 (Pretty print pattern type values with transmute if they don't satisfy their pattern)
 - rust-lang#136311 (Ensure that we never try to monomorphize the upcasting or vtable calls of impossible dyn types)
 - rust-lang#136315 (Use short ty string for binop and unop errors)
 - rust-lang#136393 (Fix accidentally not emitting overflowing literals lints anymore in patterns)
 - rust-lang#136530 (Implement `x perf` directly in bootstrap)
 - rust-lang#136580 (Couple of changes to run rustc in miri)
 - rust-lang#136589 (Enable "jump to def" feature on rustc docs)

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

…kingjubilee

Rollup of 9 pull requests

Successful merges:

 - rust-lang#135439 (Make `-O` mean `OptLevel::Aggressive`)
 - rust-lang#136193 (Implement pattern type ffi checks)
 - rust-lang#136235 (Pretty print pattern type values with transmute if they don't satisfy their pattern)
 - rust-lang#136311 (Ensure that we never try to monomorphize the upcasting or vtable calls of impossible dyn types)
 - rust-lang#136315 (Use short ty string for binop and unop errors)
 - rust-lang#136393 (Fix accidentally not emitting overflowing literals lints anymore in patterns)
 - rust-lang#136530 (Implement `x perf` directly in bootstrap)
 - rust-lang#136580 (Couple of changes to run rustc in miri)
 - rust-lang#136589 (Enable "jump to def" feature on rustc docs)

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

Couple of changes to run rustc in miri

This is not the full set of patches required to run rustc in miri, but it is the fast majority of the changes to rustc itself. There is also a change to the jobserver crate necessary and on arm64 a change to the memchr crate. Running rustc in miri has already found some UB: rust-lang#136579

cc rust-lang#135870 (comment)

Rollup merge of rust-lang#136580 - bjorn3:miri_fixes, r=lqd

Couple of changes to run rustc in miri

This is not the full set of patches required to run rustc in miri, but it is the fast majority of the changes to rustc itself. There is also a change to the jobserver crate necessary and on arm64 a change to the memchr crate. Running rustc in miri has already found some UB: rust-lang#136579

cc rust-lang#135870 (comment)

…_case, r=compiler-errors

Stacker now handles miri using a noop impl itself

Reverts a no longer necessary change from rust-lang#136580.

Rollup merge of rust-lang#137374 - bjorn3:remove_stacker_miri_special_case, r=compiler-errors

Stacker now handles miri using a noop impl itself

Reverts a no longer necessary change from rust-lang#136580.