204 lines
7.8 KiB
Text
204 lines
7.8 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.ir.ir init.lean.parser.parser
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import init.lean.parser.identifier init.lean.parser.string_literal
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import init.lean.ir.reserved
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namespace lean
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namespace ir
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open lean.parser
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def symbol (s : string) : parser unit :=
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(str s >> whitespace) <?> ("'" ++ s ++ "'")
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def keyword (s : string) : parser unit :=
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(try $ str s >> not_followed_by_sat is_id_rest >> whitespace) <?> ("'" ++ s ++ "'")
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def parse_type : parser type :=
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(keyword "bool" >> return type.bool)
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<|> (keyword "byte" >> return type.byte)
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<|> (keyword "uint16" >> return type.uint16)
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<|> (keyword "uint32" >> return type.uint32)
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<|> (keyword "uint64" >> return type.uint64)
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<|> (keyword "usize" >> return type.usize)
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<|> (keyword "int16" >> return type.int16)
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<|> (keyword "int32" >> return type.int32)
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<|> (keyword "int64" >> return type.int64)
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<|> (keyword "float" >> return type.float)
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<|> (keyword "double" >> return type.double)
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<|> (keyword "object" >> return type.object)
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def parse_assign_unop : parser assign_unop :=
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(keyword "not" >> return assign_unop.not)
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<|> (keyword "neg" >> return assign_unop.neg)
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<|> (keyword "is_scalar" >> return assign_unop.is_scalar)
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<|> (keyword "is_shared" >> return assign_unop.is_shared)
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<|> (keyword "is_null" >> return assign_unop.is_null)
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<|> (keyword "array_copy" >> return assign_unop.array_copy)
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<|> (keyword "sarray_copy" >> return assign_unop.sarray_copy)
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<|> (keyword "box" >> return assign_unop.box)
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<|> (keyword "unbox" >> return assign_unop.unbox)
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<|> (keyword "cast" >> return assign_unop.cast)
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<|> (keyword "array_size" >> return assign_unop.array_size)
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<|> (keyword "sarray_size" >> return assign_unop.sarray_size)
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<|> (keyword "string_len" >> return assign_unop.string_len)
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<|> (keyword "succ" >> return assign_unop.succ)
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def parse_assign_binop : parser assign_binop :=
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(keyword "add" >> return assign_binop.add)
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<|> (keyword "sub" >> return assign_binop.sub)
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<|> (keyword "mul" >> return assign_binop.mul)
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<|> (keyword "div" >> return assign_binop.div)
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<|> (keyword "mod" >> return assign_binop.mod)
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<|> (keyword "shl" >> return assign_binop.shl)
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<|> (keyword "shr" >> return assign_binop.shr)
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<|> (keyword "and" >> return assign_binop.and)
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<|> (keyword "or" >> return assign_binop.or)
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<|> (keyword "xor" >> return assign_binop.xor)
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<|> (keyword "le" >> return assign_binop.le)
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<|> (keyword "lt" >> return assign_binop.lt)
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<|> (keyword "eq" >> return assign_binop.eq)
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<|> (keyword "ne" >> return assign_binop.ne)
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<|> (keyword "array_read" >> return assign_binop.array_read)
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def parse_unop : parser unop :=
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(keyword "inc_ref" >> return unop.inc_ref)
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<|> (keyword "dec_ref" >> return unop.dec_ref)
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<|> (keyword "inc" >> return unop.inc)
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<|> (keyword "dec" >> return unop.dec)
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<|> (keyword "dec_sref" >> return unop.dec_sref)
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<|> (keyword "free" >> return unop.free)
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<|> (keyword "dealloc" >> return unop.dealloc)
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<|> (keyword "array_pop" >> return unop.array_pop)
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<|> (keyword "sarray_pop" >> return unop.sarray_pop)
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def parse_binop : parser binop :=
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(keyword "array_push" >> return binop.array_push)
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<|> (keyword "string_push" >> return binop.string_push)
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<|> (keyword "string_append" >> return binop.string_append)
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def parse_literal : parser literal :=
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(keyword "tt" >> return (literal.bool tt))
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<|> (keyword "ff" >> return (literal.bool ff))
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<|> (do n ← lexeme num <?> "numeral", return (literal.num n))
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<|> (do n ← (ch '-' >> lexeme num), return (literal.num (- n)))
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<|> literal.str <$> parse_string_literal
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def parse_uint16 : parser uint16 :=
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try (do p ← pos,
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n ← lexeme num,
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when (n ≥ uint16_sz) $ unexpected_at "big numeral, it does not fit in an uint16" p,
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return $ uint16.of_nat n)
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<?> "uint16"
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def parse_usize : parser usize :=
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try (do p ← pos,
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n ← lexeme num,
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when (n ≥ usize_sz) $ unexpected_at "big numeral, it does not fit in an usize" p,
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return $ usize.of_nat n)
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<?> "usize"
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def identifier : parser name :=
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try (do p ← pos,
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n ← lean.parser.identifier,
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when (is_reserved_name n) $ unexpected_at "keyword" p,
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return n)
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<?> "identifier"
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def parse_var : parser var :=
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lexeme identifier <?> "variable"
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def parse_fnid : parser fnid :=
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lexeme identifier <?> "function name"
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def parse_blockid : parser blockid :=
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lexeme identifier <?> "label"
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def parse_nary_call (x : var) : parser instr :=
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do xs ← many1 parse_var,
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symbol ":=",
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keyword "call",
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fid ← parse_fnid,
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ys ← many parse_var,
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return $ instr.call ([x] ++ xs) fid ys
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def parse_typed_assignment (x : var) : parser instr :=
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do symbol ":",
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ty ← parse_type,
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symbol ":=",
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(keyword "sget" >> instr.sget x ty <$> parse_var <*> parse_usize)
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<|> (instr.assign_unop x ty <$> parse_assign_unop <*> parse_var)
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<|> (instr.assign_binop x ty <$> parse_assign_binop <*> parse_var <*> parse_var)
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<|> (instr.assign_lit x ty <$> parse_literal)
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def parse_untyped_assignment (x : var) : parser instr :=
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do symbol ":=",
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(keyword "closure" >> instr.closure x <$> parse_fnid <*> many parse_var)
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<|> (keyword "apply" >> instr.apply x <$> many1 parse_var)
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<|> (keyword "get" >> instr.get x <$> parse_var <*> parse_uint16)
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<|> (keyword "call" >> instr.call [x] <$> parse_fnid <*> many parse_var)
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<|> (keyword "cnstr" >> instr.cnstr x <$> parse_uint16 <*> parse_uint16 <*> parse_usize)
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<|> (keyword "array" >> instr.array x <$> parse_var <*> parse_var)
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<|> (keyword "sarray" >> instr.sarray x <$> parse_type <*> parse_var <*> parse_var)
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def parse_assignment : parser instr :=
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do x ← parse_var,
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c ← curr,
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if c = ':' then (parse_untyped_assignment x <|> parse_typed_assignment x)
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else parse_nary_call x
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def parse_instr : parser instr :=
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(keyword "array_write" >> instr.array_write <$> parse_var <*> parse_var <*> parse_var)
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<|> (keyword "set" >> instr.set <$> parse_var <*> parse_uint16 <*> parse_var)
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<|> (keyword "sset" >> instr.sset <$> parse_var <*> parse_usize <*> parse_var)
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<|> (keyword "call" >> instr.call [] <$> parse_fnid <*> many parse_var)
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<|> (instr.unop <$> parse_unop <*> parse_var)
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<|> (instr.binop <$> parse_binop <*> parse_var <*> parse_var)
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<|> parse_assignment
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def parse_phi : parser phi :=
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do (x, ty) ← try $ do { x ← parse_var, symbol ":", ty ← parse_type, symbol ":=", keyword "phi", return (x, ty) },
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ys ← many1 parse_var,
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return {x := x, ty := ty, ys := ys}
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def parse_terminator : parser terminator :=
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(keyword "jmp" >> terminator.jmp <$> parse_blockid)
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<|> (keyword "ret" >> terminator.ret <$> many parse_var)
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<|> (keyword "case" >> terminator.case <$> parse_var <*> (symbol "[" >> sep_by1 parse_blockid (symbol ",") <* symbol "]"))
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def parse_block : parser block :=
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do id ← try (parse_blockid <* symbol ":"),
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ps ← many (parse_phi <* symbol ";"),
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is ← many (parse_instr <* symbol ";"),
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t ← parse_terminator <* symbol ";",
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return { id := id, phis := ps, instrs := is, term := t }
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def parse_arg : parser arg :=
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do symbol "(", x ← parse_var, symbol ":", ty ← parse_type, symbol ")", return {n := x, ty := ty}
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def parse_header (is_const : bool) : parser header :=
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do n ← parse_fnid,
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as ← if is_const then return [] else many parse_arg,
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r ← if is_const
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then do symbol ":", t ← parse_type, return [result.mk t]
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else try (symbol ":" >> many1 (result.mk <$> parse_type)) <|> return [],
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return { name := n, args := as, return := r, is_const := is_const }
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def parse_def : parser decl :=
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keyword "def" >> decl.defn <$> parse_header ff <*> (symbol ":=" >> many parse_block)
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def parse_defconst : parser decl :=
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keyword "defconst" >> decl.defn <$> parse_header tt <*> (symbol ":=" >> many parse_block)
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def parse_external : parser decl :=
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keyword "external" >> decl.external <$> parse_header ff
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def parse_decl : parser decl :=
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parse_def <|> parse_defconst <|> parse_external
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end ir
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end lean
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