9a71c2dbb6
This feature was originally added to implement the state monad. It is not needed anymore since we have a better encoding that doesn't require this feature and avoids memory allocations.
451 lines
18 KiB
Text
451 lines
18 KiB
Text
/-
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Copyright (c) 2018 Microsoft Corporation. All rights reserved.
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Released under Apache 2.0 license as described in the file LICENSE.
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Authors: Leonardo de Moura
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-/
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prelude
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import init.lean.name_mangling init.lean.config
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import init.lean.ir.type_check
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namespace lean
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namespace ir
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/--
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C++ code extraction configuration object.
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- `unit_name`: compilation unit name. The name is used to generate initialization/finalization procedures.
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- `unit_deps`: list of compilation units the given unit depends on. This information is also used to generate
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initialization and finalization procedures.
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- `runtime_dir` : location of the Lean C++ runtime include files.
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- `env`: mapping from declaration name to declaration.
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- `external_names`: a mapping s.t. entry `(fid, n)` is in the mapping when we need to use name `n` for
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declaration `fid` when emitting C++ code.
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- `main_proc`: name of the main procedure. Initialization and finalization code is inserted for it.
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-/
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structure extract_cpp_config :=
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(unit_name : string := "main")
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(unit_deps : list string := [])
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(runtime_dir : string := "runtime")
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(env : environment := λ _, none)
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(external_names : fnid → option string := λ _, none)
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(main_proc : option fnid := none)
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namespace cpp
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def initialize_prefix := "_lean_initialize_"
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def finalize_prefix := "_lean_finalize_"
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def file_header (runtime_dir : string) :=
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"#include <" ++ runtime_dir ++ "/object.h>\n"
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++ "#include <" ++ runtime_dir ++ "/apply.h>\n"
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++ "typedef lean::object obj;"
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structure extract_env :=
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(cfg : extract_cpp_config)
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(ctx : context := mk_context)
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@[derive monad monad_except monad_state monad_reader monad_run]
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def extract_m := reader_t extract_env (except_t format (state_t string id))
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def emit {α} [has_to_string α] (a : α) : extract_m unit :=
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modify (++ (to_string a))
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def emit_line : extract_m unit :=
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emit "\n"
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@[inline] def paren {α} (a : extract_m α) : extract_m α :=
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emit "(" *> a <* emit ")"
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@[inline] def comma (a b : extract_m unit) : extract_m unit :=
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a *> emit ", " *> b
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local infix ` <+> `:65 := comma
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def emit_var (x : var) : extract_m unit :=
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emit $ name.mangle x "_x"
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def emit_blockid (b : blockid) : extract_m unit :=
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emit $ name.mangle b "_lbl"
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def fid2cpp (fid : fnid) : extract_m string :=
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do env ← read,
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match env.cfg.external_names fid with
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| some s := pure s
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| none := pure (name.mangle fid)
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def emit_fnid (fid : fnid) : extract_m unit :=
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fid2cpp fid >>= emit
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def is_const (fid : fnid) : extract_m bool :=
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do env ← read,
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match env.cfg.env fid with
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| some d := pure d.header.is_const
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| none := pure ff
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def global2cpp (fid : fnid) : extract_m string :=
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do s ← fid2cpp fid, pure $ "_g" ++ s
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def emit_global (fid : fnid) : extract_m unit :=
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global2cpp fid >>= emit
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def type2cpp : type → string
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| type.bool := "unsigned char" | type.byte := "unsigned char"
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| type.uint16 := "unsigned short" | type.uint32 := "unsigned" | type.uint64 := "unsigned long long" | type.usize := "size_t"
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| type.int16 := "short" | type.int32 := "int" | type.int64 := "long long"
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| type.float := "float" | type.double := "double"
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| type.object := "obj*"
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def emit_type (ty : type) : extract_m unit :=
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emit (type2cpp ty)
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def emit_sep_aux {α} (f : α → extract_m unit) (sep : string) : list α → extract_m unit
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| [] := pure ()
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| [a] := f a
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| (a::as) := f a *> emit sep *> emit " " *> emit_sep_aux as
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def emit_sep {α} (l : list α) (f : α → extract_m unit) (sep := ",") : extract_m unit :=
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emit_sep_aux f sep l
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def emit_var_list (xs : list var) : extract_m unit :=
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emit_sep xs emit_var
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def emit_template_params (ts : list type) : extract_m unit :=
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emit "<" *> emit_sep ts emit_type *> emit ">"
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def emit_template_param (t : type) : extract_m unit :=
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emit_template_params [t]
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def emit_arg_list (args : list arg) : extract_m unit :=
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emit_sep args $ λ a, emit_type a.ty *> emit " " *> emit_var a.n
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/-- Emit end-of-statement -/
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def emit_eos : extract_m unit :=
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emit ";" *> emit_line
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def emit_cases : list blockid → nat → extract_m unit
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| [] n := throw "ill-formed case terminator"
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| [b] n := emit "default: goto " *> emit_blockid b *> emit_eos
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| (b::bs) n := emit "case " *> emit n *> emit ": goto " *> emit_blockid b *> emit_eos *> emit_cases bs (n+1)
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def emit_case : var → list blockid → extract_m unit
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| x [b] := emit "goto " *> emit_blockid b *> emit_eos
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| x [b₁,b₂] := do
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env ← read,
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(match env.ctx.find x with
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| some type.bool := emit "if (" *> emit_var x *> emit ") goto " *> emit_blockid b₂ *> emit "; else goto " *> emit_blockid b₁
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| some type.uint32 := emit "if (" *> emit_var x *> emit " == 0) goto " *> emit_blockid b₁ *> emit "; else goto " *> emit_blockid b₂
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| _ := throw "ill-formed case"),
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emit_eos
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| x bs := do
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env ← read,
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emit "switch ",
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paren (emit_var x),
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emit " {" *> emit_line *> emit_cases bs 0 *> emit "}" *> emit_line
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def emit_terminator (term : terminator) : extract_m unit :=
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term.decorate_error $
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match term with
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| (terminator.jmp b) := emit "goto " *> emit_blockid b *> emit_eos
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| (terminator.ret x) := emit "return " *> emit_var x *> emit_eos
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| (terminator.case x bs) := emit_case x bs
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def emit_type_size (ty : type) : extract_m unit :=
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emit "sizeof" *> paren(emit_type ty)
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/-- Emit `op(x)` -/
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def emit_op_x (op : string) (x : var) : extract_m unit :=
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emit op *> paren (emit_var x)
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/-- Emit `x := y op z` -/
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def emit_infix (x y z : var) (op : string) : extract_m unit :=
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emit_var x *> emit " = " *> emit_var y *> emit " " *> emit op *> emit " " *> emit_var z
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/- Emit `x := big_op(y, z)` -/
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def emit_big_binop (x y z : var) (big_op : string) : extract_m unit :=
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emit_var x *> emit " = " *> emit big_op *> paren (emit_var y <+> emit_var z)
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def emit_arith (t : type) (x y z : var) (op : string) (big_op : string) : extract_m unit :=
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match t with
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| type.object := emit_big_binop x y z big_op
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| _ := emit_infix x y z op
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def emit_logical_arith (t : type) (x y z : var) (bool_op : string) (op : string) (big_op : string) : extract_m unit :=
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match t with
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| type.bool := emit_infix x y z bool_op
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| type.object := emit_big_binop x y z big_op
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| _ := emit_infix x y z op
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def emit_assign_binop (x : var) (t : type) (op : assign_binop) (y z : var) : extract_m unit :=
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match op with
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| assign_binop.add := emit_arith t x y z "+" "lean::nat_add"
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| assign_binop.sub := emit_arith t x y z "-" "lean::nat_sub"
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| assign_binop.mul := emit_arith t x y z "*" "lean::nat_mul"
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| assign_binop.div := emit_arith t x y z "/" "lean::nat_div"
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| assign_binop.mod := emit_arith t x y z "%" "lean::nat_mod"
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| assign_binop.iadd := emit_big_binop x y z "lean::int_add"
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| assign_binop.isub := emit_big_binop x y z "lean::int_sub"
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| assign_binop.imul := emit_big_binop x y z "lean::int_mul"
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| assign_binop.idiv := emit_big_binop x y z "lean::int_div"
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| assign_binop.imod := emit_big_binop x y z "lean::int_mod"
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| assign_binop.shl := emit_infix x y z "<<"
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| assign_binop.shr := emit_infix x y z ">>"
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| assign_binop.and := emit_logical_arith t x y z "&&" "&" "lean::nat_land"
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| assign_binop.or := emit_logical_arith t x y z "||" "|" "lean::nat_lor"
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| assign_binop.xor := emit_logical_arith t x y z "!=" "^" "lean::nat_lxor"
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| assign_binop.le := emit_arith t x y z "<=" "lean::nat_le"
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| assign_binop.lt := emit_arith t x y z "<" "lean::nat_lt"
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| assign_binop.eq := emit_arith t x y z "==" "lean::nat_eq"
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| assign_binop.ne := emit_arith t x y z "!=" "lean::nat_ne"
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| assign_binop.ile := emit_big_binop x y z "lean::int_le"
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| assign_binop.ilt := emit_big_binop x y z "lean::int_lt"
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| assign_binop.ieq := emit_big_binop x y z "lean::int_eq"
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| assign_binop.ine := emit_big_binop x y z "lean::int_ne"
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| assign_binop.array_read :=
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(match t with
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| type.object := emit_var x *> emit " = lean::array_obj" *> paren (emit_var y <+> emit_var z)
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| _ := emit_var x *> emit " = lean::sarray_data" *> emit_template_param t *> paren (emit_var y <+> emit_var z))
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| assign_binop.array_push :=
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do env ← read, emit_var x, emit " = ",
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if env.ctx.find z = some type.object then emit "lean::array_push" else emit "lean::sarray_push",
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paren(emit_var y <+> emit_var z)
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| assign_binop.string_push := emit_var x *> emit " = lean::string_push" *> paren (emit_var y <+> emit_var z)
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| assign_binop.string_append := emit_var x *> emit " = lean::string_append" *> paren (emit_var y <+> emit_var z)
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/-- Emit `x := op(y)` -/
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def emit_x_op_y (x : var) (op : string) (y : var) : extract_m unit :=
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emit_var x *> emit " = " *> emit op *> paren(emit_var y)
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def assign_unop2cpp (t : type) : assign_unop → string
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| assign_unop.not := if t = type.bool then "!" else "~"
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| assign_unop.neg := "-"
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| assign_unop.ineg := "lean::int_neg"
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| assign_unop.nat2int := "lean::nat2int"
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| assign_unop.is_scalar := "lean::is_scalar"
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| assign_unop.is_shared := "lean::is_shared"
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| assign_unop.is_null := "lean::is_null"
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| assign_unop.box := "lean::box"
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| assign_unop.unbox := "lean::unbox"
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| assign_unop.cast := "static_cast<" ++ type2cpp t ++ ">"
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| assign_unop.array_copy := "lean::array_copy"
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| assign_unop.sarray_copy := "lean::sarray_copy"
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| assign_unop.array_size := "lean::array_size"
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| assign_unop.sarray_size := "lean::sarray_size"
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| assign_unop.string_len := "lean::string_len"
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| assign_unop.succ := "lean::nat_succ"
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| assign_unop.tag_ref := "lean::cnstr_tag"
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| assign_unop.tag := "lean::obj_tag"
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def emit_assign_unop (x : var) (t : type) (op : assign_unop) (y : var) : extract_m unit :=
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emit_var x *> emit " = " *> emit (assign_unop2cpp t op) *> paren(emit_var y)
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def emit_num_suffix : type → extract_m unit
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| type.uint32 := emit "u"
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| type.uint64 := emit "ull"
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| type.int64 := emit "ll"
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| _ := pure ()
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def emit_assign_lit (x : var) (t : type) (l : literal) : extract_m unit :=
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match l with
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| literal.bool tt := emit_var x *> emit " = true"
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| literal.bool ff := emit_var x *> emit " = false"
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| literal.str s := emit_var x *> emit " = lean::mk_string" *> paren(emit (repr s))
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| literal.float v := emit_var x *> emit " = " *> emit v
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| literal.num v :=
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match t with
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| type.object :=
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emit_var x *> emit " = " *>
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if v < uint32_sz then emit "lean::mk_nat_obj" *> paren(emit v *> emit "u")
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else emit "lean::mk_mpz_core(lean::mpz(\"" *> emit v *> emit "\"))"
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| _ := emit_var x *> emit " = " *> emit v *> emit_num_suffix t
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def unop2cpp : unop → string
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| unop.inc_ref := "lean::inc_ref"
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| unop.dec_ref := "lean::dec_ref"
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| unop.dec_sref := "lean::dec_shared_ref"
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| unop.inc := "lean::inc"
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| unop.dec := "lean::dec"
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| unop.free := "free"
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| unop.dealloc := "lean::dealloc"
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| unop.array_pop := "lean::array_pop"
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| unop.sarray_pop := "lean::sarray_pop"
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def emit_unop (op : unop) (x : var) : extract_m unit :=
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emit (unop2cpp op) *> paren(emit_var x)
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def emit_apply (x : var) (ys : list var) : extract_m unit :=
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match ys with
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| (f::as) :=
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let n := as.length in
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if n > closure_max_args
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then emit "{ obj * as[" *> emit n *> emit "] = {" *> emit_var_list as *> emit "}; "
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*> emit_var x *> emit " = apply_m" *> paren(emit_var f <+> emit n <+> emit "as") *> emit "; }"
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else emit_var x *> emit " = apply_" *> emit n *> paren(emit_var_list ys)
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| _ := throw "ill-formed apply"
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def emit_closure (x : var) (f : fnid) (ys : list var) : extract_m unit :=
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do env ← read,
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match env.cfg.env f with
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| some d := do
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emit_var x, emit " = lean::alloc_closure(",
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let arity := d.header.args.length,
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fname ← fid2cpp f,
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let fname := if arity > closure_max_args then "uncurry" ++ fname else fname,
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emit "reinterpret_cast<lean::lean_cfun>(" *> emit fname *> emit ")" <+> emit arity <+> emit ys.length,
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emit ")",
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ys.mfoldl (λ i y, emit ";\nlean::closure_set_arg" *> paren (emit_var x <+> emit i <+> emit_var y) *> pure (i+1)) 0,
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pure ()
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| none := throw "invalid closure"
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def emit_instr (ins : instr) : extract_m unit :=
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ins.decorate_error $
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(match ins with
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| (instr.assign x t y) := emit_var x *> emit " = " *> emit_var y
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| (instr.assign_lit x t l) := emit_assign_lit x t l
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| (instr.assign_unop x t op y) := emit_assign_unop x t op y
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| (instr.assign_binop x t op y z) := emit_assign_binop x t op y z
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| (instr.unop op x) := emit_unop op x
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| (instr.call x f ys) := do
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emit_var x *> emit " = ",
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c ← is_const f,
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if c then emit_global f
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else (emit_fnid f *> paren(emit_var_list ys))
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| (instr.cnstr o t n sz) := emit_var o *> emit " = lean::alloc_cnstr" *> paren(emit t <+> emit n <+> emit sz)
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| (instr.set o i x) := emit "lean::cnstr_set_obj" *> paren (emit_var o <+> emit i <+> emit_var x)
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| (instr.get x o i) := emit_var x *> emit " = lean::cnstr_obj" *> paren(emit_var o <+> emit i)
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| (instr.sset o d x) := emit "lean::cnstr_set_scalar" *> paren(emit_var o <+> emit d <+> emit_var x)
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| (instr.sget x t o d) := emit_var x *> emit " = lean::cnstr_scalar" *> emit_template_param t *> paren(emit_var o <+> emit d)
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| (instr.closure x f ys) := emit_closure x f ys
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| (instr.apply x ys) := emit_apply x ys
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| (instr.array a sz c) := emit_var a *> emit " = lean::alloc_array" *> paren(emit_var sz <+> emit_var c)
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| (instr.sarray a t sz c) := emit_var a *> emit " = lean::alloc_sarray" *> paren(emit_type_size t <+> emit_var sz <+> emit_var c)
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| (instr.array_write a i v) :=
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do env ← read,
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if env.ctx.find v = some type.object
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then emit "lean::array_set_obj" *> paren(emit_var a <+> emit_var i <+> emit_var v)
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else emit "lean::sarray_set_data" *> paren(emit_var a <+> emit_var i <+> emit_var v))
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*> emit_eos
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def emit_block (b : block) : extract_m unit :=
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unless b.phis.empty (throw "failed to extract C++ code, definition contains phi nodes")
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*> emit_blockid b.id *> emit ":" *> emit_line
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*> b.instrs.mfor emit_instr
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*> emit_terminator b.term
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def emit_header (h : header) : extract_m unit :=
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emit_type h.return.ty *> emit " " *> emit_fnid h.name *> paren(emit_arg_list h.args)
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def decl_local (x : var) (ty : type) : extract_m unit :=
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emit_type ty *> emit " " *> emit_var x *> emit_eos
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def decl_locals (args : list arg) : extract_m unit :=
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do env ← read,
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env.ctx.mfor $ λ x ty,
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unless (args.any (λ a, a.n = x)) (decl_local x ty)
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def need_uncurry (d : decl) : bool :=
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d.header.args.length > lean.closure_max_args &&
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d.header.return.ty = type.object &&
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d.header.args.all (λ a, a.ty = type.object)
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def emit_uncurry_header (d : decl) : extract_m unit :=
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emit "obj* uncurry" *> emit_fnid d.header.name *> emit "(obj** as)"
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def emit_uncurry (d : decl) : extract_m unit :=
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let nargs := d.header.args.length in
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emit_uncurry_header d *> emit " {\n"
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*> emit "return " *> emit_fnid d.header.name *> paren (emit "as[0]" *> (nargs-1).mrepeat (λ i, emit ", " *> emit "as[" *> emit (i+1) *> emit "]")) *> emit_eos
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*> emit "}\n"
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def emit_def_core (d : decl) : extract_m unit :=
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d.decorate_error $
|
||
match d with
|
||
| (decl.defn h bs) :=
|
||
emit_header h *> emit " {" *> emit_line
|
||
*> decl_locals h.args *> bs.mfor emit_block
|
||
*> emit "}" *> emit_line *>
|
||
when (need_uncurry d) (emit_uncurry d)
|
||
| _ := pure ()
|
||
|
||
section
|
||
local attribute [reducible] extract_m
|
||
def emit_def (d : decl) : extract_m unit :=
|
||
do env ← read,
|
||
ctx ← monad_lift $ infer_types d env.cfg.env,
|
||
adapt_reader (λ env : extract_env, {ctx := ctx, ..env}) $
|
||
emit_def_core d
|
||
end
|
||
|
||
def collect_used (d : list decl) : fnid_set :=
|
||
d.foldl (λ s d, match d with
|
||
| decl.defn _ bs := bs.foldl (λ s b, b.instrs.foldl (λ s ins, match ins with
|
||
| instr.call _ fid _ := s.insert fid
|
||
| instr.closure _ fid _ := s.insert fid
|
||
| _ := s) s) s
|
||
| _ := s) mk_fnid_set
|
||
|
||
def emit_used_headers (ds : list decl) : extract_m unit :=
|
||
let used := collect_used ds in
|
||
do env ← read,
|
||
used.mfor (λ fid, match env.cfg.env fid with
|
||
| some d := do
|
||
unless (env.cfg.external_names fid = none) (emit "extern \"C\" "),
|
||
emit_header d.header *> emit ";\n" *> when (need_uncurry d) (emit_uncurry_header d *> emit ";\n")
|
||
| _ := pure ())
|
||
|
||
def emit_global_var_decls (ds : list decl) : extract_m unit :=
|
||
ds.mfor $ λ d, when d.header.is_const $
|
||
emit_type d.header.return.ty *> emit " " *> emit_global d.header.name *> emit ";\n"
|
||
|
||
def emit_initialize_proc (ds : list decl) : extract_m unit :=
|
||
do env ← read,
|
||
emit "void ", emit initialize_prefix, emit env.cfg.unit_name, emit "() {\n",
|
||
emit "if (_G_initialized) return;\n",
|
||
emit "_G_initialized = true;\n",
|
||
env.cfg.unit_deps.mfor $ λ dep, emit initialize_prefix *> emit dep *> emit "();\n",
|
||
ds.mfor $ λ d, when d.header.is_const $
|
||
emit_global d.header.name *> emit " = " *> emit_fnid d.header.name *> emit "();\n",
|
||
emit "}\n"
|
||
|
||
def emit_finalize_proc (ds : list decl) : extract_m unit :=
|
||
do env ← read,
|
||
emit "void ", emit finalize_prefix, emit env.cfg.unit_name, emit "() {\n",
|
||
emit "if (_G_finalized) return;\n",
|
||
emit "_G_finalized = true;\n",
|
||
env.cfg.unit_deps.mfor $ λ dep, emit finalize_prefix *> emit dep *> emit "();\n",
|
||
ds.mfor $ λ d, when (d.header.is_const && d.header.return.ty = type.object) $
|
||
emit "if (!is_scalar(" *> emit_global d.header.name *> emit ")) lean::dec_ref(" *> emit_global d.header.name *> emit ");\n",
|
||
emit "}\n"
|
||
|
||
def emit_main_proc : extract_m unit :=
|
||
do env ← read,
|
||
match env.cfg.main_proc with
|
||
| some fid :=
|
||
(match env.cfg.env fid with
|
||
| some d :=
|
||
unless (d.header.args.length = 0) (throw $ "invalid main function '" ++ to_string fid ++ "', it must not take any arguments")
|
||
*> unless (d.header.return.ty = type.int32) (throw $ "invalid main function '" ++ to_string fid ++ "', return type must be int32")
|
||
*> emit "int main() {\n"
|
||
*> emit initialize_prefix *> emit env.cfg.unit_name *> emit "();\n"
|
||
*> emit "int r = " *> emit_fnid fid *> emit "();\n"
|
||
*> emit finalize_prefix *> emit env.cfg.unit_name *> emit "();\n"
|
||
*> emit "return r;\n}\n"
|
||
| none := throw ("unknown main function '" ++ to_string fid ++ "'"))
|
||
| none := pure ()
|
||
|
||
end cpp
|
||
|
||
open cpp
|
||
|
||
def extract_cpp (ds : list decl) (cfg : extract_cpp_config := {}) : except format string :=
|
||
let out := file_header cfg.runtime_dir ++ "\n" in
|
||
run (emit_used_headers ds
|
||
*> emit "static bool _G_initialized = false;\n"
|
||
*> emit "static bool _G_finalized = false;\n"
|
||
*> emit_global_var_decls ds
|
||
*> emit_initialize_proc ds
|
||
*> emit_finalize_proc ds
|
||
*> ds.mfor emit_def
|
||
*> emit_main_proc
|
||
*> get)
|
||
{cfg := cfg} out
|
||
|
||
end ir
|
||
end lean
|