* Rebase fallout.
* Move rustc_middle::middle::cstore to rustc_session.
* Create more accurate debuginfo for vtables.
Before this commit all vtables would have the same name "vtable" in
debuginfo. Now they get a name that identifies the implementing type
and the trait that is being implemented.
* Remove alloc::prelude
As per the libs team decision in #58935.
Closes#58935
* Make hash_result an Option.
* Properly check `target_features` not to trigger an assertion
* Add LLVM CFI support to the Rust compiler
This commit adds LLVM Control Flow Integrity (CFI) support to the Rust
compiler. It initially provides forward-edge control flow protection for
Rust-compiled code only by aggregating function pointers in groups
identified by their number of arguments.
Forward-edge control flow protection for C or C++ and Rust -compiled
code "mixed binaries" (i.e., for when C or C++ and Rust -compiled code
share the same virtual address space) will be provided in later work as
part of this project by defining and using compatible type identifiers
(see Type metadata in the design document in the tracking issue #89653).
LLVM CFI can be enabled with -Zsanitizer=cfi and requires LTO (i.e.,
-Clto).
* Update to nightly-2021-10-30
* Add deduplication of constant values as rustc relies on LLVM doing that
Co-authored-by: Camille GILLOT <gillot.camille@gmail.com>
Co-authored-by: Michael Woerister <michaelwoerister@posteo>
Co-authored-by: Amanieu d'Antras <amanieu@gmail.com>
Co-authored-by: Yuki Okushi <yuki.okushi@huawei.com>
Co-authored-by: Ramon de C Valle <rcvalle@users.noreply.github.com>
