Auto merge of #74862 - mark-i-m:mv-compiler, r=petrochenkov

Move almost all compiler crates to compiler/

This PR implements rust-lang/compiler-team#336 and moves all `rustc_*` crates from `src` to the new `compiler` directory.

`librustc_foo` directories are renamed to `rustc_foo`.
`src` directories are introduced inside `rustc_*` directories to mirror the scheme already use for `library` crates.

Author: bors

Cargo.toml

@@ -1,8 +1,7 @@
 [workspace]
 members = [
   "src/bootstrap",
-  "src/rustc",
-  "src/librustc_codegen_llvm",
+  "compiler/rustc",
   "library/std",
   "library/test",
   "src/tools/cargotest",

src/rustc/Cargo.toml renamed to compiler/rustc/Cargo.toml

@@ -6,14 +6,14 @@ edition = '2018'
 
 [[bin]]
 name = "rustc_binary"
-path = "rustc.rs"
+path = "src/main.rs"
 
 [dependencies]
-rustc_driver = { path = "../librustc_driver" }
+rustc_driver = { path = "../rustc_driver" }
 
 # Make sure rustc_codegen_ssa ends up in the sysroot, because this
 # crate is intended to be used by codegen backends, which may not be in-tree.
-rustc_codegen_ssa = { path = "../librustc_codegen_ssa" }
+rustc_codegen_ssa = { path = "../rustc_codegen_ssa" }
 
 [dependencies.jemalloc-sys]
 version = '0.3.0'

src/rustc/rustc.rs renamed to compiler/rustc/src/main.rs

@@ -4,10 +4,6 @@ name = "rustc_apfloat"
 version = "0.0.0"
 edition = "2018"
 
-[lib]
-name = "rustc_apfloat"
-path = "lib.rs"
-
 [dependencies]
 bitflags = "1.2.1"
 smallvec = { version = "1.0", features = ["union", "may_dangle"] }

src/librustc_apfloat/Cargo.toml renamed to compiler/rustc_apfloat/Cargo.toml

@@ -4,10 +4,6 @@ name = "rustc_arena"
 version = "0.0.0"
 edition = "2018"
 
-[lib]
-name = "rustc_arena"
-path = "lib.rs"
-
 [dependencies]
-rustc_data_structures = { path = "../librustc_data_structures" }
+rustc_data_structures = { path = "../rustc_data_structures" }
 smallvec = { version = "1.0", features = ["union", "may_dangle"] }