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annotate examples/OCaml-Kaleidoscope/Chapter5/toy.ml @ 148:63bd29f05246

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merged
author Shinji KONO <kono@ie.u-ryukyu.ac.jp>
date Wed, 14 Aug 2019 19:46:37 +0900
parents 95c75e76d11b
children
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1 (*===----------------------------------------------------------------------===
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2 * Main driver code.
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3 *===----------------------------------------------------------------------===*)
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4
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5 open Llvm
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6 open Llvm_executionengine
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7 open Llvm_target
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8 open Llvm_scalar_opts
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9
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10 let main () =
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11 ignore (initialize_native_target ());
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12
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13 (* Install standard binary operators.
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14 * 1 is the lowest precedence. *)
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15 Hashtbl.add Parser.binop_precedence '<' 10;
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16 Hashtbl.add Parser.binop_precedence '+' 20;
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17 Hashtbl.add Parser.binop_precedence '-' 20;
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18 Hashtbl.add Parser.binop_precedence '*' 40; (* highest. *)
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19
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20 (* Prime the first token. *)
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21 print_string "ready> "; flush stdout;
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22 let stream = Lexer.lex (Stream.of_channel stdin) in
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23
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24 (* Create the JIT. *)
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25 let the_execution_engine = ExecutionEngine.create Codegen.the_module in
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26 let the_fpm = PassManager.create_function Codegen.the_module in
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27
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28 (* Set up the optimizer pipeline. Start with registering info about how the
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29 * target lays out data structures. *)
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30 DataLayout.add (ExecutionEngine.target_data the_execution_engine) the_fpm;
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31
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32 (* Do simple "peephole" optimizations and bit-twiddling optzn. *)
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33 add_instruction_combination the_fpm;
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34
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35 (* reassociate expressions. *)
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36 add_reassociation the_fpm;
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37
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38 (* Eliminate Common SubExpressions. *)
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39 add_gvn the_fpm;
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40
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41 (* Simplify the control flow graph (deleting unreachable blocks, etc). *)
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42 add_cfg_simplification the_fpm;
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43
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44 ignore (PassManager.initialize the_fpm);
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45
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46 (* Run the main "interpreter loop" now. *)
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47 Toplevel.main_loop the_fpm the_execution_engine stream;
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48
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49 (* Print out all the generated code. *)
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50 dump_module Codegen.the_module
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51 ;;
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52
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53 main ()