[gcc/devel/rust/master] Merge #1385 #1386 #1387 #1388

[gcc/devel/rust/master] Merge #1385 #1386 #1387 #1388

[Thomas Schwinge]

https://gcc.gnu.org/g:0a9416fc0446b1da80cb39d2534bf030ae7739bd

commit 0a9416fc0446b1da80cb39d2534bf030ae7739bd
Merge: f51284b5988 8775525b042 81c4b6989f0 6bf6241f29e e3f135ef0be
Author: bors[bot] <26634292+bors[bot]@users.noreply.github.com>
Date:   Fri Jul 15 11:02:55 2022 +0000

    Merge #1385 #1386 #1387 #1388
    
    1385: Add missing include for intellisense r=philberty a=philberty
    
    
    
    1386: Fix undefined behaviour using .get on unique_ptr r=philberty a=philberty
    
    As the move semantics for AST and HIR crates are unsafe on older compilers
    we are working around this by storing the pointer into the mappings class
    this was using the get method to store the pointer. The issue for loading
    extern crates the unique_ptr goes out of scope and this the deletion code
    resulting in undefined behaviour. This changes it to call release to take
    full ownership of the pointer as we expect.
    
    
    1387: External Items with Rust ABI need to mangle the full path r=philberty a=philberty
    
    When compiling external rust abi item requires the fully qualified
    canonical path to be mangled in order to link correctly.
    
    
    1388: Add new interfaces to mappings class r=philberty a=philberty
    
    In order to load and resolve extern crates we need to support detection
    of node_id is a crate in order to support paths outside of the current
    crate.
    
    
    Co-authored-by: Philip Herron <philip.herron@embecosm.com>

Diff:

 gcc/rust/backend/rust-compile-extern.h    | 11 +++++
 gcc/rust/resolve/rust-ast-resolve-item.cc |  6 +++
 gcc/rust/resolve/rust-ast-resolve-path.cc |  3 +-
 gcc/rust/resolve/rust-ast-resolve-type.cc |  3 +-
 gcc/rust/rust-object-export.h             |  2 +
 gcc/rust/util/rust-hir-map.cc             | 68 ++++++++++++++++++++++++++++++-
 gcc/rust/util/rust-hir-map.h              | 31 ++++----------
 7 files changed, 96 insertions(+), 28 deletions(-)