/3rd_party/llvm/examples/OCaml-Kaleidoscope/Chapter7/toy.ml
https://code.google.com/p/softart/ · OCaml · 57 lines · 26 code · 15 blank · 16 comment · 0 complexity · 9f32059e86c5bc8ae0130ab2e947601d MD5 · raw file
- (*===----------------------------------------------------------------------===
- * Main driver code.
- *===----------------------------------------------------------------------===*)
- open Llvm
- open Llvm_executionengine
- open Llvm_target
- open Llvm_scalar_opts
- let main () =
- ignore (initialize_native_target ());
- (* Install standard binary operators.
- * 1 is the lowest precedence. *)
- Hashtbl.add Parser.binop_precedence '=' 2;
- Hashtbl.add Parser.binop_precedence '<' 10;
- Hashtbl.add Parser.binop_precedence '+' 20;
- Hashtbl.add Parser.binop_precedence '-' 20;
- Hashtbl.add Parser.binop_precedence '*' 40; (* highest. *)
- (* Prime the first token. *)
- print_string "ready> "; flush stdout;
- let stream = Lexer.lex (Stream.of_channel stdin) in
- (* Create the JIT. *)
- let the_execution_engine = ExecutionEngine.create Codegen.the_module in
- let the_fpm = PassManager.create_function Codegen.the_module in
- (* Set up the optimizer pipeline. Start with registering info about how the
- * target lays out data structures. *)
- DataLayout.add (ExecutionEngine.target_data the_execution_engine) the_fpm;
- (* Promote allocas to registers. *)
- add_memory_to_register_promotion the_fpm;
- (* Do simple "peephole" optimizations and bit-twiddling optzn. *)
- add_instruction_combination the_fpm;
- (* reassociate expressions. *)
- add_reassociation the_fpm;
- (* Eliminate Common SubExpressions. *)
- add_gvn the_fpm;
- (* Simplify the control flow graph (deleting unreachable blocks, etc). *)
- add_cfg_simplification the_fpm;
- ignore (PassManager.initialize the_fpm);
- (* Run the main "interpreter loop" now. *)
- Toplevel.main_loop the_fpm the_execution_engine stream;
- (* Print out all the generated code. *)
- dump_module Codegen.the_module
- ;;
- main ()