Rollup merge of #62735 - petrochenkov:galloc, r=alexcrichton

Turn `#[global_allocator]` into a regular attribute macro

It was a 99% macro with exception of some diagnostic details.

As a result of the change, `#[global_allocator]` now works in nested modules and even in nameless blocks.

Fixes https://github.com/rust-lang/rust/issues/44113
Fixes https://github.com/rust-lang/rust/issues/58072

2 files changed, 2 insertions, 4 deletions

diff --git a/src/librustc_codegen_llvm/allocator.rs b/src/librustc_codegen_llvm/allocator.rs
index 02a05fd1102..5d43bf6ae28 100644
--- a/src/librustc_codegen_llvm/allocator.rs
+++ b/src/librustc_codegen_llvm/allocator.rs
@@ -2,9 +2,8 @@ use std::ffi::CString;
 
 use crate::attributes;
 use libc::c_uint;
-use rustc::middle::allocator::AllocatorKind;
 use rustc::ty::TyCtxt;
-use rustc_allocator::{ALLOCATOR_METHODS, AllocatorTy};
+use syntax::ext::allocator::{AllocatorKind, AllocatorTy, ALLOCATOR_METHODS};
 
 use crate::ModuleLlvm;
 use crate::llvm::{self, False, True};
diff --git a/src/librustc_codegen_llvm/lib.rs b/src/librustc_codegen_llvm/lib.rs
index 0f0b9f27917..8dd241bd81a 100644
--- a/src/librustc_codegen_llvm/lib.rs
+++ b/src/librustc_codegen_llvm/lib.rs
@@ -32,7 +32,6 @@ extern crate flate2;
 #[macro_use] extern crate bitflags;
 extern crate libc;
 #[macro_use] extern crate rustc;
-extern crate rustc_allocator;
 extern crate rustc_target;
 #[macro_use] extern crate rustc_data_structures;
 extern crate rustc_incremental;
@@ -52,13 +51,13 @@ use rustc_codegen_ssa::back::lto::{SerializedModule, LtoModuleCodegen, ThinModul
 use rustc_codegen_ssa::CompiledModule;
 use errors::{FatalError, Handler};
 use rustc::dep_graph::WorkProduct;
+use syntax::ext::allocator::AllocatorKind;
 use syntax_pos::symbol::InternedString;
 pub use llvm_util::target_features;
 use std::any::Any;
 use std::sync::{mpsc, Arc};
 
 use rustc::dep_graph::DepGraph;
-use rustc::middle::allocator::AllocatorKind;
 use rustc::middle::cstore::{EncodedMetadata, MetadataLoader};
 use rustc::session::Session;
 use rustc::session::config::{OutputFilenames, OutputType, PrintRequest, OptLevel};