This commit adds support for linting `extern crate` statements for stability
attributes attached to the crate itself. This is likely to be the mechanism used
to deny access to experimental crates that are part of the standard
distribution.
cc #18585
This almost completely avoids GEPi's and pointer manipulation,
postponing it until the end with one big write of the whole vector. This
leads to a small speed-up in compilation, and makes it easier for LLVM
to work with the values, e.g. with `--opt-level=0`,
pub fn foo() -> f32x4 {
f32x4(0.,0.,0.,0.)
}
was previously compiled to
define <4 x float> @_ZN3foo20h74913e8b13d89666eaaE() unnamed_addr #0 {
entry-block:
%sret_slot = alloca <4 x float>
%0 = getelementptr inbounds <4 x float>* %sret_slot, i32 0, i32 0
store float 0.000000e+00, float* %0
%1 = getelementptr inbounds <4 x float>* %sret_slot, i32 0, i32 1
store float 0.000000e+00, float* %1
%2 = getelementptr inbounds <4 x float>* %sret_slot, i32 0, i32 2
store float 0.000000e+00, float* %2
%3 = getelementptr inbounds <4 x float>* %sret_slot, i32 0, i32 3
store float 0.000000e+00, float* %3
%4 = load <4 x float>* %sret_slot
ret <4 x float> %4
}
but now becomes
define <4 x float> @_ZN3foo20h74913e8b13d89666eaaE() unnamed_addr #0 {
entry-block:
ret <4 x float> zeroinitializer
}
Removes all target-specific knowledge from rustc. Some targets have changed
during this, but none of these should be very visible outside of
cross-compilation. The changes make our targets more consistent.
iX86-unknown-linux-gnu is now only available as i686-unknown-linux-gnu. We
used to accept any value of X greater than 1. i686 was released in 1995, and
should encompass the bare minimum of what Rust supports on x86 CPUs.
The only two windows targets are now i686-pc-windows-gnu and
x86_64-pc-windows-gnu.
The iOS target has been renamed from arm-apple-ios to arm-apple-darwin.
A complete list of the targets we accept now:
arm-apple-darwin
arm-linux-androideabi
arm-unknown-linux-gnueabi
arm-unknown-linux-gnueabihf
i686-apple-darwin
i686-pc-windows-gnu
i686-unknown-freebsd
i686-unknown-linux-gnu
mips-unknown-linux-gnu
mipsel-unknown-linux-gnu
x86_64-apple-darwin
x86_64-unknown-freebsd
x86_64-unknown-linux-gnu
x86_64-pc-windows-gnu
Closes#16093
[breaking-change]
Closes#18126.
At the moment this mostly only changes notes that are particularly help-oriented or directly suggest the user to do something to help messages, and does not change messages that simply explain an error message further. If it is decided that those messages should also be help messages, I can add them to this PR, but for now I’m excluding them as I believe that changing those messages might leave very few places where notes would be appropriate.
There's currently a bug in it which fires erroneously on cross compiles,
preventing new nightlies from being generated. This can be reset back to Deny
once it's been fixed.
cc #18587
If a dylib is being produced, the compiler will now first check to see if it can
be created entirely statically before falling back to dynamic dependencies. This
behavior can be overridden with `-C prefer-dynamic`.
Due to the alteration in behavior, this is a breaking change. Any previous users
relying on dylibs implicitly maximizing dynamic dependencies should start
passing `-C prefer-dynamic` to compilations.
Closes#18499
[breaking-change]
There's currently a bug in it which fires erroneously on cross compiles,
preventing new nightlies from being generated. This can be reset back to Deny
once it's been fixed.
cc #18587
