a5733050de
Rollup of 11 pull requests Successful merges: - #53112 (pretty print BTreeSet) - #53208 (Don't panic on std::env::vars() when env is null.) - #53226 (driver: set the syntax edition in phase 1) - #53229 (Make sure rlimit is only ever increased) - #53233 (targets: aarch64: Add bare-metal aarch64 target) - #53239 (rustc_codegen_llvm: Restore the closure env alloca hack for LLVM 5.) - #53246 (A few cleanups) - #53257 (Idiomatic improvements to IP method) - #53274 (Remove statics field from CodegenCx) - #53290 (Make LLVM emit assembly comments with -Z asm-comments) - #53317 (Mark prior failure to avoid ICE)
The driver
crate is effectively the "main" function for the rust
compiler. It orchestrates the compilation process and "knits together"
the code from the other crates within rustc. This crate itself does
not contain any of the "main logic" of the compiler (though it does
have some code related to pretty printing or other minor compiler
options).
For more information about how the driver works, see the rustc guide.