Remove rustboot from the repository.

1 files changed, 0 insertions, 41 deletions

diff --git a/src/comp/README b/src/comp/README
index 9411a5b7876..974511a8c0a 100644
--- a/src/comp/README
+++ b/src/comp/README
@@ -1,16 +1,6 @@
 An informal guide to reading and working on the rustc compiler.
 ==================================================================
 
-First off, know that our current state of development is "bootstrapping";
-this means we've got two compilers on the go and one of them is being used
-to develop the other. Rustboot is written in ocaml and rustc in rust. The
-one you *probably* ought to be working on at present is rustc. Rustboot is
-more for historical comparison and bug-fixing whenever necessary to un-block
-development of rustc.
-
-There's a document similar to this next door, then, in boot/README. The boot
-directory is where we do work on rustboot.
-
 If you wish to expand on this document, or have one of the
 slightly-more-familiar authors add anything else to it, please get in touch or
 file a bug. Your concerns are probably the same as someone else's.
@@ -85,34 +75,3 @@ Control and information flow within the compiler:
   type-directed translation to LLVM-ese. When it's finished synthesizing LLVM
   values, rustc asks LLVM to write them out as a bitcode file, on which you
   can run the normal LLVM pipeline (opt, llc, as) to get an executable.
-
-
-Comparison with rustboot
-========================
-
-Rustc is written in a more "functional" style than rustboot; each rustc pass
-tends to depend only on the AST it's given as input, which it does not mutate.
-Calculations flow from one phase to another by repeatedly rebuilding the AST
-with additional annotations.
-
-Rustboot normalizes to a statement-centric AST. Rustc uses an
-expression-centric AST.
-
-Rustboot generates 3-address IL into imperative buffers of coded IL quads.
-Rustc generates LLVM, an SSA-based expression IL.
-
-Rustc, being attached to LLVM, generates much better code. Factor of 5
-smaller, usually. Sometimes much more.
-
-Rustc preserves more of the parsed input structure. Rustboot "desugars" most
-of the input, rendering round-trip pretty-printing impossible. Error reporting
-is also better in rustc, as type names (as denoted by the user) are preserved
-throughout typechecking.
-
-Rustc is not concerned with the PIC-ness of the resulting code, nor anything
-to do with encoding DWARF or x86 instructions. All this superfluous
-machine-level logic that seeped up to the translation layer in rustboot is
-pushed past LLVM into later stages of the toolchain in rustc.
-
-Numerous "bad idea" idiosyncracies of the rustboot AST have been eliminated in
-rustc. In general the code is much more obvious, minimal and straightforward.