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267 Commits

Author SHA1 Message Date
Yukihiro "Matz" Matsumoto 9e74aad43c codegen.c: fixed a bug in mrb_decode_insn(). 2021-08-13 12:38:10 +09:00
Yukihiro "Matz" Matsumoto 7907c184be codegen.c: add a comment that notice rewind_pc calling convention. 
`rewind_pc` should not be called when `s->pc` is `0` (top).
 2021-08-13 10:11:36 +09:00
Yukihiro "Matz" Matsumoto 9c3d305530 codegen.c: refactor mrb_last_insn(). 
Last commit made `mrb_decode_insn()` to take `NULL` as `pc`.
 2021-08-13 10:10:17 +09:00
Yukihiro "Matz" Matsumoto cbdc4f2c5c codegen.c: mrb_prev_pc can return NULL at the top of iseq. 2021-08-13 10:02:01 +09:00
Yukihiro "Matz" Matsumoto e1b170160b codegen.c: avoid signedness warning of int comparison. 2021-08-11 16:10:32 +09:00
Yukihiro "Matz" Matsumoto a85f2299c0 codegen.c: avoid cross initialization of mrb_insn_data. 2021-08-11 16:09:51 +09:00
Yukihiro "Matz" Matsumoto b1b9b157f8 codegen.c: more peephole optimization. 
`a=10; a+=1` to generate:

```
    1 000 OP_LOADI      R1      11              ; R1:a
```

instead of:

```
    1 000 OP_LOADI      R1      10              ; R1:a
    1 003 OP_MOVE       R2      R1              ; R1:a
    1 006 OP_ADDI       R2      1
    1 009 OP_MOVE       R1      R2              ; R1:a
```
 2021-08-11 10:48:18 +09:00
Yukihiro "Matz" Matsumoto 06f49b3f84 codegen.c: need to push the value when the loop was eliminated. 2021-08-07 12:11:38 +09:00
Yukihiro "Matz" Matsumoto 37dbb91b96 codegen.c: -9223372036854775808 % -1 overflows 64 bit integer. 2021-08-06 10:35:06 +09:00
Yukihiro "Matz" Matsumoto 7ecc16f97a codegen.c: remove code duplication from NODE_ARRAY. 2021-08-05 16:59:32 +09:00
Yukihiro "Matz" Matsumoto 9cb44f5ae3 codegen.c: detect integer overflow in division. 
`MRB_INT_MIN / -1` overflows.
 2021-08-04 12:25:14 +09:00
Yukihiro "Matz" Matsumoto caaa07f2da codegen.c: check zero division before constant folding. 2021-08-03 16:43:50 +09:00
Yukihiro "Matz" Matsumoto 2092bc7fe8 codegen.c: avoid division by zero in constant folding. 2021-08-03 15:57:01 +09:00
Yukihiro "Matz" Matsumoto 4fa24e4ff9 codegen.c: allow constant folding for negative integer modulo. 2021-08-02 16:48:16 +09:00
Yukihiro "Matz" Matsumoto e93642d53f codegen.c: refactor readint() to read MRB_INT_MIN. 2021-08-02 14:10:38 +09:00
Yukihiro "Matz" Matsumoto 9902ab50fc codegen.c: fix a bug in bit shift constant folding. 2021-08-02 08:53:50 +09:00
Yukihiro "Matz" Matsumoto 907df715ef codegen.c: refactor unary operator optimization. 2021-08-02 08:51:39 +09:00
Yukihiro "Matz" Matsumoto 188c150f44 codegen.c: constant folding binary operators, <<, >>, %, &, |, ^. 2021-08-02 07:34:54 +09:00
Yukihiro "Matz" Matsumoto 1315e8751e codegen.c: eliminate loop if condition is constant. 
For example, `while false; ...; end` should be removed.
 2021-08-01 20:33:41 +09:00
Yukihiro "Matz" Matsumoto 9dc801a798 codegen.c: peephole optimize OP_JMPxxx. 2021-08-01 20:31:19 +09:00
Yukihiro "Matz" Matsumoto b1cb6c3c69 codegen.c: allow constant folding for mul / div. 2021-07-31 21:14:54 +09:00
Yukihiro "Matz" Matsumoto 43999492a7 codegen.c: mrb_prev_pc() to take previous instruction position. 
It rescans `s->iseq` so that peephole optimizer can take multiple
previous instructions for constant folding, etc.
 2021-07-31 21:11:36 +09:00
Yukihiro "Matz" Matsumoto 517071e3fa codegen.c: order instructions in natural order for loops. 
`while` and `until` generates in `cond` `jmpif` `body` `jmp` order.
It used to be in `jmp` `body` `cond` `jmpif` order.
 2021-07-29 17:38:18 +09:00
Yukihiro "Matz" Matsumoto 64358c09d9 codegen.c: labels should be uint32_t. 2021-07-28 23:08:58 +09:00
Yukihiro "Matz" Matsumoto adfd29c1b0 codegen.c: fix loopinfo structure members. 
- `pc0`: `next` destination
- `pc1`: `redo` destination (renamed from `pc2`)
- `pc3`: `break` destination (renamed from `pc3`)

old `pc1` was unused so removed.
 2021-07-28 23:08:58 +09:00
Yukihiro "Matz" Matsumoto e81d497155 codegen.c: removed bytecode when the value of while is not used. 2021-07-28 23:08:58 +09:00
Yukihiro "Matz" Matsumoto 2910af0010 codegen.c: fixed a bug when value is taken from while and until. 
```ruby
p ((while true; p 1; break; end))
```

should print `1 nil` but was `1`.
 2021-07-28 23:08:57 +09:00
Yukihiro "Matz" Matsumoto 5c804cf68f Remove redundant include headers. 
- stdlib.h
- stddef.h
- stdint.h
- stdarg.h
- limits.h
- float.h
 2021-07-25 13:07:10 +09:00
Yukihiro "Matz" Matsumoto 9c43276eb5 codegen.c: fixed a bug in OP_LOADI32 peephole optimization. 2021-07-23 11:20:18 +09:00
Yukihiro "Matz" Matsumoto 598c97ef76 codegen.c: get_int_operand() to support OP_LOADL (int in pool). 2021-07-22 11:49:47 +09:00
Yukihiro "Matz" Matsumoto d0fed63414 codegen.c: add constant folding for unary numeric operators (+, -, ~). 2021-07-22 11:39:52 +09:00
Yukihiro "Matz" Matsumoto 3e9ed1cca2 codegen.c: compare symbol names directly avoiding string conversion. 2021-07-22 11:21:00 +09:00
Yukihiro "Matz" Matsumoto e42f192827 codegen.c: skip -@ call if the argument is a literal integer. 2021-07-21 13:20:34 +09:00
Yukihiro "Matz" Matsumoto 2ef6e94489 codegen.c: move gen_setxv() after new_sym(). 2021-07-21 13:15:27 +09:00
Yukihiro "Matz" Matsumoto 81b384e3fb codegen.c: introduce gen_int() to generate integer instructions. 2021-07-21 13:15:27 +09:00
Yukihiro "Matz" Matsumoto 47fca90069 codegen.c: add peephole optimization for OP_LOADI32 before OP_MOVE. 2021-07-21 08:00:02 +09:00
Yukihiro "Matz" Matsumoto 28bf950e01 codegen.c: add peephole optimization for OP_LOADI16 before OP_MOVE. 2021-07-21 07:54:08 +09:00
Yukihiro "Matz" Matsumoto 275fe8c94b codegen.c: a new function get_int_operand. 2021-07-21 07:52:39 +09:00
Yukihiro "Matz" Matsumoto 5066e2370d codegen.c: negative zero equals to positive zero. 
`OP_LOADI Rn -0` should be `OP_LOADI_0`.
 2021-07-20 18:24:33 +09:00
Yukihiro "Matz" Matsumoto cdf54f3159 codegen.c: allow OP_EXT before OP_ADDI and OP_SUBI. 
This is preparation for integer constant folding.
 2021-07-20 11:07:37 +09:00
Yukihiro "Matz" Matsumoto 887df090cb codegen.c: optimize variable assignments after OP_MOVE. 
- `OP_SETGV`
- `OP_SETIV`
- `OP_SETCV`
- `OP_SETCONST`
 2021-07-17 19:51:25 +09:00
Yukihiro "Matz" Matsumoto 4dda97502b codegen.c: optimize OP_SETUPVAR after OP_MOVE. 2021-07-17 19:51:24 +09:00
Yukihiro "Matz" Matsumoto 70f31d4bb4 codegen.c: add new peephole optimization for OP_MOVE. 
If `OP_MOVE` comes after `OP_GETUPVAR`, you can skip move and redirect
the destination register of `OP_GETUPVAR`.
 2021-07-16 07:55:25 +09:00
Yukihiro "Matz" Matsumoto 1a3564f2f1 codegen.c: add new peephole optimization for OP_GETUPVAR. 
When `OP_GETUPVAR` is generated right after `OP_SETUPVAR`, there is no
need to read the upvar back to the register, e.g.

    3 008 OP_ADDI       R2      1
    3 011 OP_SETUPVAR   R2      1       0
    4 015 OP_GETUPVAR   R2      1       0
    4 019 OP_LOADI_2    R3

`OP_GETUPVAR` at the address `015` is useless. We can skip it like:

    3 008 OP_ADDI       R2      1
    3 011 OP_SETUPVAR   R2      1      0
    4 015 OP_LOADI_2    R3
 2021-07-16 07:52:21 +09:00
Yukihiro "Matz" Matsumoto b7d75591f3 codegen.c: gen_jmpdst always needs to generate relative address. 2021-07-15 14:08:17 +09:00
Yukihiro "Matz" Matsumoto a1ba6cb728 codegen.c: avoid uninitialized local variable. 2021-07-09 09:09:11 +09:00
Yukihiro "Matz" Matsumoto a6657afab9 codegen.c: jump address should be generated by gen_jmpdst(). 2021-07-04 00:08:17 +09:00
Yukihiro "Matz" Matsumoto d9a8981c26 vm.c: OP_DEF to push a symbol to a register. 
The code generator no longer need to emit `OP_LOADSYM` after `OP_DEF`.
`doc/opcode.md` is also updated.
 2021-07-03 06:40:05 +09:00
Yukihiro "Matz" Matsumoto 99dbcec89c Revert "Remove OP_EXT[123] from operands." 
This reverts commit fd10c72319.

I thought it was OK to restrict index value within 1 byte, but in some
cases index value could be 16 bits (2 bytes). I had several ideas to
address the issue, but reverting `fd10c72` is the easiest way. The
biggest reason is `mruby/c` still supports `OP_EXT[123]`, so that they
don't need any additional work.
 2021-06-30 22:41:13 +09:00
dearblue 52b29f41a3 Fixed finding variables defined in the upper proc failed 
If no new variable was defined in the `eval` method, the variable was hidden from the nested `eval` method.

```ruby
a = 1
p eval %(b = 2; eval %(a)) # => 1 (good)
p eval %(eval %(a)) # => undefined method 'a' (NoMethodError)
```

This issue has occurred since mruby 3.0.0.
 2021-06-26 11:00:32 +09:00