360 lines
14 KiB
Text
360 lines
14 KiB
Text
/-
|
||
Copyright (c) 2018 Microsoft Corporation. All rights reserved.
|
||
Released under Apache 2.0 license as described in the file LICENSE.
|
||
Authors: Leonardo de Moura
|
||
-/
|
||
prelude
|
||
import init.lean.name_mangling init.lean.config
|
||
import init.lean.ir.type_check
|
||
|
||
namespace lean
|
||
namespace ir
|
||
namespace cpp
|
||
def file_header :=
|
||
"#include <runtime/lean_obj.h>
|
||
#include <runtime/apply.h>
|
||
typedef lean::lean_obj obj;"
|
||
|
||
structure extract_env :=
|
||
(external_names : fnid → option string)
|
||
(ctx : context)
|
||
(env : environment)
|
||
|
||
@[reducible] def extract_m := reader_t extract_env (except_t format (state_t string id))
|
||
|
||
def emit {α} [has_to_string α] (a : α) : extract_m unit :=
|
||
modify (++ (to_string a))
|
||
|
||
def emit_line : extract_m unit :=
|
||
emit "\n"
|
||
|
||
def paren {α} (a : extract_m α) : extract_m α :=
|
||
emit "(" >> a <* emit ")"
|
||
|
||
def comma (a b : extract_m unit) : extract_m unit :=
|
||
a >> emit ", " >> b
|
||
|
||
local infix `<+>`:65 := comma
|
||
|
||
def emit_var (x : var) : extract_m unit :=
|
||
emit $ name.mangle x "_x"
|
||
|
||
def emit_blockid (b : blockid) : extract_m unit :=
|
||
emit $ name.mangle b "_lbl"
|
||
|
||
def fid2cpp (fid : fnid) : extract_m string :=
|
||
do env ← read,
|
||
match env.external_names fid with
|
||
| some s := return s
|
||
| none := return (name.mangle fid)
|
||
|
||
def emit_fnid (fid : fnid) : extract_m unit :=
|
||
fid2cpp fid >>= emit
|
||
|
||
def type2cpp : type → string
|
||
| type.bool := "unsigned char" | type.byte := "unsigned char"
|
||
| type.uint16 := "unsigned short" | type.uint32 := "unsigned" | type.uint64 := "unsigned long long" | type.usize := "size_t"
|
||
| type.int16 := "short" | type.int32 := "int" | type.int64 := "long long"
|
||
| type.float := "float" | type.double := "double"
|
||
| type.object := "obj*"
|
||
|
||
def emit_type (ty : type) : extract_m unit :=
|
||
emit (type2cpp ty)
|
||
|
||
def emit_sep_aux {α} (f : α → extract_m unit) (sep : string) : list α → extract_m unit
|
||
| [] := return ()
|
||
| [a] := f a
|
||
| (a::as) := f a >> emit sep >> emit " " >> emit_sep_aux as
|
||
|
||
def emit_sep {α} (l : list α) (f : α → extract_m unit) (sep := ",") : extract_m unit :=
|
||
emit_sep_aux f sep l
|
||
|
||
def emit_var_list (xs : list var) : extract_m unit :=
|
||
emit_sep xs emit_var
|
||
|
||
def emit_template_params (ts : list type) : extract_m unit :=
|
||
emit "<" >> emit_sep ts emit_type >> emit ">"
|
||
|
||
def emit_template_param (t : type) : extract_m unit :=
|
||
emit_template_params [t]
|
||
|
||
def emit_return : list result → extract_m unit
|
||
| [] := emit "void"
|
||
| [r] := emit_type r.ty
|
||
| rs := emit "std::tuple" >> emit_template_params (rs.map result.ty)
|
||
|
||
def emit_arg_list (args : list arg) : extract_m unit :=
|
||
emit_sep args $ λ a, emit_type a.ty >> emit " " >> emit_var a.n
|
||
|
||
/-- Emit end-of-statement -/
|
||
def emit_eos : extract_m unit :=
|
||
emit ";" >> emit_line
|
||
|
||
def emit_tag (x : var) : extract_m unit :=
|
||
emit "lean::cnstr_tag" >> paren(emit_var x)
|
||
|
||
def emit_return_vars : list var → extract_m unit
|
||
| [] := return ()
|
||
| [x] := emit_var x
|
||
| xs := emit "std::make_tuple" >> paren(emit_var_list xs)
|
||
|
||
def emit_cases : list blockid → nat → extract_m unit
|
||
| [] n := throw "ill-formed case terminator"
|
||
| [b] n := emit "default: goto " >> emit_blockid b >> emit_eos
|
||
| (b::bs) n := emit "case " >> emit n >> emit ": goto " >> emit_blockid b >> emit_eos >> emit_cases bs (n+1)
|
||
|
||
def emit_case : var → list blockid → extract_m unit
|
||
| x [b] := emit "goto " >> emit_blockid b >> emit_eos
|
||
| x [b₁,b₂] := do
|
||
env ← read,
|
||
(match env.ctx.find x with
|
||
| some type.bool := emit "if (" >> emit_var x >> emit ") goto " >> emit_blockid b₂ >> emit "; else goto " >> emit_blockid b₁
|
||
| some type.uint32 := emit "if (" >> emit_var x >> emit " == 0) goto " >> emit_blockid b₁ >> emit "; else goto " >> emit_blockid b₂
|
||
| _ := emit "if (" >> emit_tag x >> emit " == 0) goto " >> emit_blockid b₁ >> emit "; else goto " >> emit_blockid b₂),
|
||
emit_eos
|
||
| x bs := do
|
||
env ← read,
|
||
emit "switch ",
|
||
paren (if env.ctx.find x = some type.uint32 then emit_var x else emit_tag x),
|
||
emit " {" >> emit_line >> emit_cases bs 0 >> emit "}" >> emit_line
|
||
|
||
def emit_terminator (term : terminator) : extract_m unit :=
|
||
term.decorate_error $
|
||
match term with
|
||
| (terminator.jmp b) := emit "goto " >> emit_blockid b >> emit_eos
|
||
| (terminator.ret xs) := emit "return " >> emit_return_vars xs >> emit_eos
|
||
| (terminator.case x bs) := emit_case x bs
|
||
|
||
def emit_call_lhs : list var → extract_m unit
|
||
| [] := return ()
|
||
| [x] := emit_var x >> emit " = "
|
||
| xs := emit "std::tie" >> paren(emit_var_list xs) >> emit " = "
|
||
|
||
def emit_type_size (ty : type) : extract_m unit :=
|
||
emit "sizeof" >> paren(emit_type ty)
|
||
|
||
/-- Emit `op(x)` -/
|
||
def emit_op_x (op : string) (x : var) : extract_m unit :=
|
||
emit op >> paren (emit_var x)
|
||
|
||
/-- Emit `x := y op z` -/
|
||
def emit_infix (x y z : var) (op : string) : extract_m unit :=
|
||
emit_var x >> emit " = " >> emit_var y >> emit " " >> emit op >> emit " " >> emit_var z
|
||
|
||
/- Emit `x := big_op(y, z)` -/
|
||
def emit_big_binop (x y z : var) (big_op : string) : extract_m unit :=
|
||
emit_var x >> emit " = " >> emit big_op >> paren (emit_var y <+> emit_var z)
|
||
|
||
def emit_arith (t : type) (x y z : var) (op : string) (big_op : string) : extract_m unit :=
|
||
match t with
|
||
| type.object := emit_big_binop x y z big_op
|
||
| _ := emit_infix x y z op
|
||
|
||
def emit_logical_arith (t : type) (x y z : var) (bool_op : string) (op : string) (big_op : option string) : extract_m unit :=
|
||
match t with
|
||
| type.bool := emit_infix x y z bool_op
|
||
| type.object :=
|
||
(match big_op with
|
||
| some big_op := emit_big_binop x y z big_op
|
||
| none := throw "ill-formed binary operator")
|
||
| _ := emit_infix x y z op
|
||
|
||
def emit_binop (x : var) (t : type) (op : binop) (y z : var) : extract_m unit :=
|
||
match op with
|
||
| binop.add := emit_arith t x y z "+" "lean::big_add"
|
||
| binop.sub := emit_arith t x y z "-" "lean::big_sub"
|
||
| binop.mul := emit_arith t x y z "*" "lean::big_mul"
|
||
| binop.div := emit_arith t x y z "/" "lean::big_div"
|
||
| binop.mod := emit_arith t x y z "%" "lean::big_mod"
|
||
| binop.shl := emit_infix x y z "<<"
|
||
| binop.shr := emit_infix x y z ">>"
|
||
| binop.and := emit_logical_arith t x y z "&&" "&" (some "lean::bigand")
|
||
| binop.or := emit_logical_arith t x y z "||" "|" (some "lean::bigor")
|
||
| binop.xor := emit_logical_arith t x y z "!=" "^" none
|
||
| binop.le := emit_arith t x y z "<=" "lean::big_le"
|
||
| binop.ge := emit_arith t x y z ">=" "lean::big_ge"
|
||
| binop.lt := emit_arith t x y z "<" "lean::big_lt"
|
||
| binop.gt := emit_arith t x y z ">" "lean::big_gt"
|
||
| binop.eq := emit_arith t x y z "==" "lean::big_eq"
|
||
| binop.ne := emit_arith t x y z "!=" "lean::big_nq"
|
||
| binop.array_read :=
|
||
(match t with
|
||
| type.object := emit_var x >> emit " = lean::array_obj" >> paren (emit_var y <+> emit_var z)
|
||
| _ := emit_var x >> emit " = lean::sarray_data" >> emit_template_param t >> paren (emit_var y <+> emit_var z))
|
||
|
||
/-- Emit `x := op(y)` -/
|
||
def emit_x_op_y (x : var) (op : string) (y : var) : extract_m unit :=
|
||
emit_var x >> emit " = " >> emit op >> paren(emit_var y)
|
||
|
||
def unop2cpp (t : type) : unop → string
|
||
| unop.not := if t = type.bool then "!" else "~"
|
||
| unop.neg := if t = type.object then "lean::big_neg" else "-"
|
||
| unop.is_scalar := "lean::is_scalar"
|
||
| unop.is_shared := "lean::is_shared"
|
||
| unop.is_null := "lean::is_null"
|
||
| unop.box := "lean::box"
|
||
| unop.unbox := "lean::unbox"
|
||
| unop.cast := "static_cast<" ++ type2cpp t ++ ">"
|
||
| unop.array_copy := "lean::array_copy"
|
||
| unop.sarray_copy := "lean::sarray_copy"
|
||
| unop.array_size := "lean::array_size"
|
||
| unop.sarray_size := "lean::sarray_size"
|
||
| unop.string_len := "lean::string_len"
|
||
|
||
def emit_unop (x : var) (t : type) (op : unop) (y : var) : extract_m unit :=
|
||
emit_var x >> emit " = " >> emit (unop2cpp t op) >> paren(emit_var y)
|
||
|
||
def emit_num_suffix : type → extract_m unit
|
||
| type.uint32 := emit "u"
|
||
| type.uint64 := emit "ull"
|
||
| type.int64 := emit "ll"
|
||
| _ := return ()
|
||
|
||
def emit_lit (x : var) (t : type) (l : literal) : extract_m unit :=
|
||
match l with
|
||
| literal.bool tt := emit_var x >> emit " = true"
|
||
| literal.bool ff := emit_var x >> emit " = false"
|
||
| literal.str s := emit_var x >> emit " = lean::mk_string" >> paren(emit (repr s))
|
||
| literal.float v := emit_var x >> emit " = " >> emit v
|
||
| literal.num v :=
|
||
match t with
|
||
| type.object := do
|
||
emit_var x >> emit " = lean::alloc_mpz(lean::mpz(",
|
||
if v < uint32_sz then emit v >> emit "u"
|
||
else emit "\"" >> emit v >> emit "\"",
|
||
emit "))"
|
||
| _ := emit_var x >> emit " = " >> emit v >> emit_num_suffix t
|
||
|
||
def unins2cpp : unins → string
|
||
| unins.inc := "lean::inc_ref"
|
||
| unins.decs := "lean::dec_shared_ref"
|
||
| unins.dec := "lean::dec_ref"
|
||
| unins.free := "free"
|
||
| unins.dealloc := "lean::dealloc"
|
||
| unins.array_pop := "lean::array_pop"
|
||
| unins.sarray_pop := "lean::sarray_pop"
|
||
|
||
def emit_unary (op : unins) (x : var) : extract_m unit :=
|
||
emit (unins2cpp op) >> paren(emit_var x)
|
||
|
||
def emit_apply (x : var) (ys : list var) : extract_m unit :=
|
||
match ys with
|
||
| (f::as) :=
|
||
let n := as.length in
|
||
if n > closure_max_args
|
||
then emit "{ obj * as[" >> emit n >> emit "] = {" >> emit_var_list as >> emit "}; "
|
||
>> emit_var x >> emit " = apply_m" >> paren(emit_var f <+> emit n <+> emit "as") >> emit "; }"
|
||
else emit_var x >> emit " = apply_" >> emit n >> paren(emit_var_list ys)
|
||
| _ := throw "ill-formed apply"
|
||
|
||
def emit_closure (x : var) (f : fnid) (ys : list var) : extract_m unit :=
|
||
do env ← read,
|
||
match env.env f with
|
||
| some d := do
|
||
emit_var x, emit " = lean::alloc_closure(",
|
||
let arity := d.header.args.length,
|
||
fname ← fid2cpp f,
|
||
let fname := if arity > closure_max_args then "uncurry" ++ fname else fname,
|
||
emit "reinterpret_cast<lean::lean_cfun>(" >> emit fname >> emit ")" <+> emit arity <+> emit ys.length,
|
||
emit ")",
|
||
ys.mfoldl (λ i y, emit ";\nlean::set_closure_arg" >> paren (emit_var x <+> emit i <+> emit_var y) >> return (i+1)) 0,
|
||
return ()
|
||
| none := throw "invalid closure"
|
||
|
||
def emit_instr (ins : instr) : extract_m unit :=
|
||
ins.decorate_error $
|
||
(match ins with
|
||
| (instr.lit x t l) := emit_lit x t l
|
||
| (instr.unop x t op y) := emit_unop x t op y
|
||
| (instr.binop x t op y z) := emit_binop x t op y z
|
||
| (instr.call xs f ys) := emit_call_lhs xs >> emit_fnid f >> paren(emit_var_list ys)
|
||
| (instr.cnstr o t n sz) := emit_var o >> emit " = lean::alloc_cnstr" >> paren(emit t <+> emit n <+> emit sz)
|
||
| (instr.set o i x) := emit "lean::set_cnstr_obj" >> paren (emit_var o <+> emit i <+> emit_var x)
|
||
| (instr.get x o i) := emit_var x >> emit " = lean::cnstr_obj" >> paren(emit_var o <+> emit i)
|
||
| (instr.sset o d x) := emit "lean::set_cnstr_scalar" >> paren(emit_var o <+> emit d <+> emit_var x)
|
||
| (instr.sget x t o d) := emit_var x >> emit " = lean::cnstr_scalar" >> emit_template_param t >> paren(emit_var o <+> emit d)
|
||
| (instr.closure x f ys) := emit_closure x f ys
|
||
| (instr.apply x ys) := emit_apply x ys
|
||
| (instr.array a sz c) := emit_var a >> emit " = lean::alloc_array" >> paren(emit_var sz <+> emit_var c)
|
||
| (instr.sarray a t sz c) := emit_var a >> emit " = lean::alloc_sarray" >> paren(emit_type_size t <+> emit_var sz <+> emit_var c)
|
||
| (instr.array_write a i v) :=
|
||
do env ← read,
|
||
if env.ctx.find v = some type.object
|
||
then emit "lean::set_array_obj" >> paren(emit_var a <+> emit_var i <+> emit_var v)
|
||
else emit "lean::set_sarray_data" >> paren(emit_var a <+> emit_var i <+> emit_var v)
|
||
| (instr.array_push a v) :=
|
||
do env ← read,
|
||
if env.ctx.find v = some type.object
|
||
then emit "lean::array_push" >> paren(emit_var a <+> emit_var v)
|
||
else emit "lean::sarray_push" >> paren(emit_var a <+> emit_var v)
|
||
| (instr.unary op x) := emit_unary op x)
|
||
>> emit_eos
|
||
|
||
def emit_block (b : block) : extract_m unit :=
|
||
unless b.phis.empty (throw "failed to extract C++ code, definition contains phi nodes")
|
||
>> emit_blockid b.id >> emit ":" >> emit_line
|
||
>> b.instrs.mfor emit_instr
|
||
>> emit_terminator b.term
|
||
|
||
def emit_header (h : header) : extract_m unit :=
|
||
emit_return h.return >> emit " " >> emit_fnid h.n >> paren(emit_arg_list h.args)
|
||
|
||
def decl_local (x : var) (ty : type) : extract_m unit :=
|
||
emit_type ty >> emit " " >> emit_var x >> emit_eos
|
||
|
||
def decl_locals (args : list arg) : extract_m unit :=
|
||
do env ← read,
|
||
env.ctx.mfor $ λ x ty,
|
||
unless (args.any (λ a, a.n = x)) (decl_local x ty)
|
||
|
||
def need_uncurry (d : decl) : bool :=
|
||
d.header.args.length > lean.closure_max_args &&
|
||
d.header.return.length = 1 &&
|
||
d.header.return.all (λ a, a.ty = type.object) &&
|
||
d.header.args.all (λ a, a.ty = type.object)
|
||
|
||
def emit_uncurry_header (d : decl) : extract_m unit :=
|
||
emit "obj* uncurry" >> emit_fnid d.header.n >> emit "(obj** as)"
|
||
|
||
def emit_uncurry (d : decl) : extract_m unit :=
|
||
let nargs := d.header.args.length in
|
||
emit_uncurry_header d >> emit " {\n"
|
||
>> emit "return " >> emit_fnid d.header.n >> paren (emit "as[0]" >> (nargs-1).mrepeat (λ i, emit ", " >> emit "as[" >> emit (i+1) >> emit "]")) >> emit_eos
|
||
>> emit "}\n"
|
||
|
||
def emit_def_core (d : decl) : extract_m unit :=
|
||
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)
|
||
| _ := return ()
|
||
|
||
def emit_def (env : environment) (external_names : fnid → option string) (d : decl) : except_t format (state_t string id) unit :=
|
||
do ctx ← monad_lift $ infer_types d env,
|
||
(emit_def_core d).run { external_names := external_names, ctx := ctx, env := env }
|
||
|
||
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 (env : environment) (external_names : fnid → option string) (d : list decl) : except_t format (state_t string id) unit :=
|
||
let used := collect_used d in
|
||
(used.mfor (λ fid, match env fid with
|
||
| some d := do
|
||
unless (external_names fid = none) (emit "extern \"C\" "),
|
||
emit_header d.header >> emit ";\n" >> when (need_uncurry d) (emit_uncurry_header d >> emit ";\n")
|
||
| _ := return ())).run { external_names := external_names, ctx := mk_context, env := env }
|
||
|
||
end cpp
|
||
|
||
def extract_cpp (env : environment) (cpp_names : fnid → option string) (ds : list decl) : except format string :=
|
||
let out := cpp.file_header ++ "\n" in
|
||
run (cpp.emit_used_headers env cpp_names ds >> ds.mfor (cpp.emit_def env cpp_names) >> get) out
|
||
|
||
end ir
|
||
end lean
|