Auto merge of #74633 - davidtwco:issue-74614-disable-polymorphisation, r=wesleywiser
Disable polymorphisation
Fixes #74614.
This PR disables polymorphisation to fix the regression in #74614 after investigation into the issue makes it clear that the fix won't be trivial. ~~I'll file an issue shortly to replace #74614 with the findings so far.~~ #74636 has been filed to track the fix of the underlying regression.
Rollup merge of #74568 - aticu:master, r=Mark-Simulacrum
Apply #66379 to `*mut T` `as_ref`
#66379 changed the documentation of `as_ref` on the type `*const T` and `as_mut` on the type `*mut T`, but it missed making that same change for `as_ref` on the type `*mut T`.
Rollup merge of #74528 - euclio:intra-link-errors, r=jyn514
refactor and reword intra-doc link errors
This commit refactors intra-doc link error reporting to deduplicate code
and decouple error construction from the type of error. This greatly
improves flexibility at each error construction site, while reducing the
complexity of the diagnostic creation.
This commit also rewords the diagnostics for clarity and style:
- Diagnostics should not end in periods.
- It's unnecessary to say "ignoring it". Since this is a warning by
default, it's already clear that the link is ignored.
Rollup merge of #73893 - ajpaverd:cfguard-stabilize, r=nikomatsakis
Stabilize control-flow-guard codegen option
This is the stabilization PR discussed in #68793. It converts the `-Z control-flow-guard` debugging option into a codegen option (`-C control-flow-guard`), and changes the associated tests.
Rollup merge of #73655 - JamieCunliffe:jamie_va-args-c, r=nikic
va_args implementation for AAPCS.
Implement the va args in codegen for AAPCS, this will be used as the
default va_args implementation for AArch64 rather than the va_args
llvm-ir as it currently is.
This should fix the following issues:
https://github.com/rust-lang/rust/issues/56475
https://github.com/rust-lang/rust/issues/72579
David Wood [Wed, 22 Jul 2020 14:03:56 +0000 (15:03 +0100)]
sess: disable polymorphisation
This commit disables polymorphisation to resolve regressions related to
closures which inherit unused generic parameters and are then used in
casts or reflection.
David Wood [Wed, 22 Jul 2020 09:31:12 +0000 (10:31 +0100)]
mir: improve polymorphic constant bug
This commit changes the span and content of the "collection encountered
polymorphic constant" bug in monomorphization collection to point to the
use of the constant rather than the definition.
Auto merge of #74620 - rust-lang:remove-most-azure, r=Mark-Simulacrum
Disable Azure Pipelines except for macOS
Following up on https://github.com/rust-lang/rust/pull/74565, this PR disables most of Azure Pipelines except for macOS auto builds, practically switching us to GitHub Actions :tada:
This patch extends the existing `type_i8p` method so that it requires an
explicit address space to be specified. Before this patch, the
`type_i8p` method implcitily assumed the default address space, which is
not a safe transformation on all targets, namely AVR.
The Rust compiler already has support for tracking the "instruction
address space" on a per-target basis. This patch extends the code
generation routines so that an address space must always be specified.
In my estimation, around 15% of the callers of `type_i8p` produced
invalid code on AVR due to the loss of address space prior to LLVM final
code generation. This would lead to unavoidable assertion errors
relating to invalid bitcasts.
With this patch, the address space is always either 1) explicitly preserved
from the input type, or 2) explicitly set to the instruction address
space because the logic is dealing with functions which must be placed
there, or 3) explicitly set to the default address space 0 because the
logic can only operate on data space pointers and thus we keep the
existing semantics of assuming the default, "data" address space.
Auto merge of #74578 - ehuss:fix-rust-src, r=Mark-Simulacrum
Fix rust-src component.
The rust-src component could not be installed by rustup because it included some symbolic links. #74520 added the backtrace directory which included some symlinks. Since the rust-src component doesn't need most of the files in the `backtrace` submodule, this changes it to only include the minimum necessary.
Tested with cargo's build-std that it can build from the resulting tarball.
Dylan McKay [Fri, 19 Jun 2020 07:04:30 +0000 (19:04 +1200)]
[AVR] Ensure that function pointers stored within aggregates are annotated with the correct space
Before this patch, a function pointer stored within an aggregate like a
struct or an enum would always have the default address space `0`.
This patch removes this assumption and instead, introspects the inner
type being pointed at, storing the target address space in the PointeeInfo
struct so that downstream users may query it.
Dylan McKay [Thu, 11 Jun 2020 05:52:09 +0000 (17:52 +1200)]
[AVR] Correctly set the pointer address space when constructing pointers to functions
This patch extends the existing `type_i8p` method so that it requires an
explicit address space to be specified. Before this patch, the
`type_i8p` method implcitily assumed the default address space, which is
not a safe transformation on all targets, namely AVR.
The Rust compiler already has support for tracking the "instruction
address space" on a per-target basis. This patch extends the code
generation routines so that an address space must always be specified.
In my estimation, around 15% of the callers of `type_i8p` produced
invalid code on AVR due to the loss of address space prior to LLVM final
code generation. This would lead to unavoidable assertion errors
relating to invalid bitcasts.
With this patch, the address space is always either 1) explicitly set to
the instruction address space because the logic is dealing with functions
which must be placed there, or 2) explicitly set to the default address
space 0 because the logic can only operate on data space pointers and thus
we keep the existing semantics of assuming the default, "data" address space.
Auto merge of #74075 - sunfishcode:wasi-prelude-rawfd, r=alexcrichton
Add `RawFd` to WASI's `std::os::wasi::prelude`.
Add `RawFd` to WASI's `std::os::wasi::prelude`, making it consistent
with all other platforms which also have `AsRawFd`, `FromRawFd`, and
`IntoRawFd` in their respective preludes.
Andy Russell [Sun, 19 Jul 2020 17:03:35 +0000 (13:03 -0400)]
refactor and reword intra-doc link errors
This commit refactors intra-doc link error reporting to deduplicate code
and decouple error construction from the type of error. This greatly
improves flexibility at each error construction site, while reducing the
complexity of the diagnostic creation.
This commit also rewords the diagnostics for clarity and style:
- Diagnostics should not end in periods.
- It's unnecessary to say "ignoring it". Since this is a warning by
default, it's already clear that the link is ignored.
Rollup merge of #74555 - GuillaumeGomez:important-traits-popup, r=Manishearth
Improve "important traits" popup display on mobile
I implemented what @XAMPPRocky suggested in the [internals thread topic](https://internals.rust-lang.org/t/feedback-on-important-traits-rustdoc-feature/12752/18). I can confirm it works nicely.
r? @Manishearth
@Manishearth: By the way: I realized that when you click on the "i", you have to click again to make the popup disappear. Do you want me to extend the popup removal to any click outside the popup?
Rollup merge of #74522 - tmiasko:sanitizer-docs, r=nikomatsakis
Update sanitizer docs
* Document AddressSanitizer memory leak detection defaults.
* Remove CC & CFLAGS from MemorySanitizer example - they are now unnecessary for pure Rust projects (backtrace-rs moved away from libbacktrace).
Rollup merge of #74051 - yodaldevoid:issue_60814, r=nikomatsakis
disallow non-static lifetimes in const generics
Disallow non-static lifetimes in const generics in order to to patch over an ICE caused when we encounter a non-static lifetime in a const generic during borrow checking. This restriction may be relaxed in the future, but we need more discussion before then, and in the meantime we should still deal with this ICE.
Rollup merge of #73323 - davidtwco:issue-73252-wfcheck-foreign-fn-decl, r=ecstatic-morse
wf: check foreign fn decls for well-formedness
Fixes #73252 and fixes #73253.
This PR extends current well-formedness checking to apply to foreign function declarations, re-using the existing machinery for regular functions. In doing this, later parts of the compiler (such as the `improper_ctypes` lint) can rely on being operations not failing as a result of invalid code which would normally be caught earlier.
David Wood [Mon, 22 Jun 2020 13:00:27 +0000 (14:00 +0100)]
ty: normalize fn sigs before subst
This commit normalizes function signatures for instances before
substituting, a workaround for polymorphization considering
parameters unused when they show up in the signature, but not the
body (due to being normalized).
Unfortunately, this causes test output to change with the parallel
compiler only.
David Wood [Mon, 22 Jun 2020 12:57:03 +0000 (13:57 +0100)]
mir: `unused_generic_params` query
This commit implements the `unused_generic_params` query, an initial
version of polymorphization which detects when an item does not use
generic parameters and is being needlessly monomorphized as a result.
David Wood [Mon, 22 Jun 2020 12:45:05 +0000 (13:45 +0100)]
shim: adjust valid shim asserts
This commit makes valid shim asserts more specific - checking for the
specific types that are valid for a given type of shim - and removes
asserts for types which require substitutions.
David Wood [Mon, 22 Jun 2020 12:36:53 +0000 (13:36 +0100)]
debuginfo: add type metadata for params
This commit adds type metadata for generic parameters (that arise from
polymorphization). Generic parameter metadata is considered zero-sized
and named after the generic parameter.
David Wood [Mon, 22 Jun 2020 12:33:17 +0000 (13:33 +0100)]
debuginfo: no type metadata if substs reqd
This commit skips generating debuginfo type metadata if substitutions
are required by the type. This avoids ICEs that result from layouts
of types with substitutions being computed.
David Wood [Mon, 22 Jun 2020 12:22:45 +0000 (13:22 +0100)]
trait_sel: only test predicates w/ no substs
This commit modifies the `substitute_normalize_and_test_predicates`
query, renaming it to `impossible_predicates` and only checking
predicates which do not require substs. By making this change,
polymorphization doesn't have to explicitly support vtables.
David Wood [Mon, 22 Jun 2020 12:02:32 +0000 (13:02 +0100)]
mir: rename `should_monomorphize_locally`
This commit renames `should_monomorphize_locally` to
`should_codegen_locally` which better describes what the function
determines once polymorphization is added.
Auto merge of #74010 - pierwill:pierwill-o-notation, r=GuillaumeGomez
Use italics for O notation
In documentation, I think it makes sense to italicize O notation (*O(n)*) as opposed to using back-ticks (`O(n)`). Visually, back-ticks focus the reader on the literal characters being used, making them ideal for representing code. Using italics, as far I can tell, more closely follows typographic conventions in mathematics and computer science.
David Wood [Sat, 13 Jun 2020 18:37:25 +0000 (19:37 +0100)]
wf: check foreign fn decls for well-formedness
This commit extends current well-formedness checking to apply to foreign
function declarations, re-using the existing machinery for regular
functions. In doing this, later parts of the compiler (such as the
`improper_ctypes` lint) can rely on being operations not failing as a
result of invalid code which would normally be caught earlier.
Auto merge of #74540 - alexcrichton:std-no-backtrace, r=Mark-Simulacrum
std: Fix compilation without backtrace feature
This should hopefully handle #74484 but in any case fixes compilation of
the standard library without the `backtrace` feature. The need for this
feature is somewhat unclear now because the `backtrace` crate should
always compile (no more C code!) but we can handle that later if
necessary.
Auto merge of #74543 - Manishearth:rollup-m5w6hyg, r=Manishearth
Rollup of 9 pull requests
Successful merges:
- #73618 (Documentation for the false keyword)
- #74486 (Improve Read::read_exact documentation)
- #74514 (Do not clobber RUSTDOCFLAGS)
- #74516 (do not try fetching the ancestors of errored trait impls)
- #74520 (include backtrace folder in rust-src component)
- #74523 (Improve documentation for `core::fmt` internals)
- #74527 (Add myself to toolstate change notifications for rustfmt)
- #74534 (Only skip impls of foreign unstable traits)
- #74536 (fix documentation surrounding the `in` and `for` keywords)
Rollup merge of #74536 - Nicholas-Baron:master, r=joshtriplett
fix documentation surrounding the `in` and `for` keywords
Addresses #74529
The `in` keyword incorrectly referenced the `Iterator` trait. This reference was changed to `IntoIterator` without changing the underlying link.
Additionally, the `IntoIterator` trait was referenced towards the end of the documentation for `for`. An additional reference was added earlier and broadened the existing documentation from any iterator to anything that can be turned into an iterator.
Rollup merge of #74520 - RalfJung:backtrace-src, r=Mark-Simulacrum
include backtrace folder in rust-src component
libstd has a [mandatory dependency on this code](https://github.com/rust-lang/rust/pull/73441/files#diff-242481015141f373dcb178e93cffa850), ergo we need to include it in rust-src.
Rollup merge of #74516 - lcnr:min-specialization-ice, r=matthewjasper
do not try fetching the ancestors of errored trait impls
fixes #74483
While building the specialization graph, we use `tcx.all_impls` which discards impls with incorrect self types,
we do however call `trait_def.ancestors` with these impls which caused an ICE as they aren't part of the
specialization graph.
Alex Crichton [Mon, 20 Jul 2020 00:30:29 +0000 (17:30 -0700)]
std: Fix compilation without backtrace feature
This should hopefully handle #74484 but in any case fixes compilation of
the standard library without the `backtrace` feature. The need for this
feature is somewhat unclear now because the `backtrace` crate should
always compile (no more C code!) but we can handle that later if
necessary.
Gabriel Smith [Sun, 5 Jul 2020 03:43:48 +0000 (23:43 -0400)]
disallow non-static lifetimes in const generics
This has been put in place to patch over an ICE caused when we encounter
a non-static lifetime in a const generic during borrow checking. This
restriction may be relaxed in the future, but we need more discussion
before then, and in the meantime we should still deal with this ICE.
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