…clif-2022-05-15

Fixes rust-lang#1228

The eventual goal is to try using this for things like the internal panicking stuff, to see whether it helps.

A pointer to address cast are often special-cased.
Introduce a dedicated cast kind to make them easy distinguishable.

It returns the previous work product or panics if there is none. This rename
makes the purpose of this method clearer.

…e_dir calls

This improves clarity of the code a bit

A WorkProduct without a saved file is useless

Add support for emitting functions with `coldcc` to LLVM

The eventual goal is to try using this for things like the internal panicking stuff, to see whether it helps.

Rollup of 5 pull requests

Successful merges:

 - rust-lang#97058 (Various refactors to the incr comp workproduct handling)
 - rust-lang#97301 (Allow unstable items to be re-exported unstably without requiring the feature be enabled)
 - rust-lang#97738 (Fix ICEs from zsts within unsized types with non-zero offsets)
 - rust-lang#97771 (Remove SIGIO reference on Haiku)
 - rust-lang#97808 (Add some unstable target features for the wasm target codegen)

Failed merges:

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

There are still two failures due to incorrect test annotations

And likewise for the `Const::val` method.

Because its type is called `ConstKind`. Also `val` is a confusing name
because `ConstKind` is an enum with seven variants, one of which is
called `Value`. Also, this gives consistency with `TyS` and `PredicateS`
which have `kind` fields.

The commit also renames a few `Const` variables from `val` to `c`, to
avoid confusion with the `ConstKind::Value` variant.

They only apply to the main source archive and their role can be
fulfilled through the skip argument of add_archive too.

Make `std::mem::needs_drop` accept `?Sized`

This change attempts to make `needs_drop` work with types like `[u8]` and `str`.

This enables code in types like `Arc<T>` that was not possible before, such as rust-lang#97676.

… r=m-ou-se

once cell renamings

This PR does the renamings proposed in rust-lang#74465 (comment)

- Move/rename `lazy::{OnceCell, Lazy}` to `cell::{OnceCell, LazyCell}`
- Move/rename `lazy::{SyncOnceCell, SyncLazy}` to `sync::{OnceLock, LazyLock}`

(I used `Lazy...` instead of `...Lazy` as it seems to be more consistent, easier to pronounce, etc)

```@rustbot``` label +T-libs-api -T-libs

We now build archives through strictly additive means rather than taking
an existing archive and potentially substracting parts.

…rister

Remove the source archive functionality of ArchiveWriter

We now build archives through strictly additive means rather than taking an existing archive and potentially substracting parts. This is simpler and makes it easier to swap out the archive writer in rust-lang#97485.

Windows uses PDB instead of DWARF and using DWARF debuginfo causes the linker to give an error

This pulls in servo/rust-smallvec#282, which
gives some small wins for rustc.

This fixes a miscompilation

This would have caught the issue that required releasing Cranelift 0.85.1

Fixes rust-lang#1234

Instead we generate a discriminant rvalue and cast the result of that.

Change enum->int casts to not go through MIR casts.

follow-up to rust-lang#96814

this simplifies all backends and even gives LLVM more information about the return value of `Rvalue::Discriminant`, enabling optimizations in more cases.

Cache DWARF objects alongside object files in work products when those
exist so that DWARF object files are available for thorin in packed mode
in incremental scenarios.

Signed-off-by: David Wood <david.wood@huawei.com>

Updates rust-lang#32976.
Updates rust-lang#99069.

…fJung

Update integer_atomics tracking issue

Updates rust-lang#32976.
Updates rust-lang#99069.

r? ``@RalfJung``

This doesn't stabilize methods working on mutable pointers.

Inline assembly uses the target features to determine which registers
are available on the current target. However it needs to be able to
access unstable target features for this.

Fixes rust-lang#99071

…=davidtwco

Keep unstable target features for asm feature checking

Inline assembly uses the target features to determine which registers
are available on the current target. However it needs to be able to
access unstable target features for this.

Fixes rust-lang#99071

Rollup of 5 pull requests

Successful merges:

 - rust-lang#98574 (Lower let-else in MIR)
 - rust-lang#99011 (`UnsafeCell` blocks niches inside its nested type from being available outside)
 - rust-lang#99030 (diagnostics: error messages when struct literals fail to parse)
 - rust-lang#99155 (Keep unstable target features for asm feature checking)
 - rust-lang#99199 (Refactor: remove an unnecessary `span_to_snippet`)

Failed merges:

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

This is no longer used only for debugging options (e.g. `-Zoutput-width`, `-Zallow-features`).
Rename it to be more clear.

This removes the last dependencies on hashbrown 0.11.

This fixes a double-free in the `clone_from` function if dropping an
existing element in the table panics. See
rust-lang/hashbrown#348 for more details.

…r=oli-obk

Use constant eval to do strict mem::uninit/zeroed validity checks

I'm not sure about the code organisation here, I just dumped the check in rustc_const_eval at the root. Not hard to move it elsewhere, in any case.

Also, this means cranelift codegen intrinsics lose the strict checks, since they don't seem to depend on rustc_const_eval, and I didn't see a point in keeping around two copies.

I also left comments in the is_zero_valid methods about "uhhh help how do i do this", those apply to both methods equally.

Also rustc_codegen_ssa now depends on rustc_const_eval... is this okay?

Pinging `@RalfJung` since you were the one who mentioned this to me, so I'm assuming you're interested.

Haven't had a chance to run full tests on this since it's really warm, and it's 1AM, I'll check out any failures/comments in the morning :)

…e_type, r=estebank"

This reverts commit 6f8fb91, reversing
changes made to 7210e46.

…kerVTable)

…crum

Upgrade indexmap and thorin-dwp to use hashbrown 0.12

This removes the last dependencies on hashbrown 0.11.

This also upgrades to hashbrown 0.12.3 to fix a double-free (rust-lang#99372).

They aren't yet supported by Cranelift

Melt some ICE

This fixes a couple of potential miscompilations. None affect cg_clif on
x86_64, but one may affect cg_clif on AArch64.

…clif-2022-07-25

Cranelift started depending on a couple of new crates