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340 Commits

Author SHA1 Message Date
Roberto Ierusalimschy
54f7b46c1e New implementation for constants 
VLOCAL expressions keep a reference to their corresponding 'Vardesc',
and 'Upvaldesc' (for upvalues) has a field 'ro' (read-only). So, it is
easier to check whether a variable is read-only. The decoupling in
VLOCAL between 'vidx' ('Vardesc' index) and 'sidx' (stack index)
should also help the forthcoming implementation of compile-time
constant propagation.
 2019-07-09 10:43:17 -03:00
Roberto Ierusalimschy
8eca21c2e8 First take on constant propagation 2019-07-01 12:42:31 -03:00
Roberto Ierusalimschy
d9f40e3f6f First implementation for 'const' variables 
A variable can be declared const, which means it cannot be assigned to,
with the syntax 'local <const> name = exp'.
 2019-05-17 11:11:44 -03:00
Roberto Ierusalimschy
23e6bac8a0 Keep correct type for immediate operands in comparisons 
When calling metamethods for things like 'a < 3.0', which generates
the opcode OP_LTI, the C register tells that the operand was
converted to an integer, so that it can be corrected to float when
calling a metamethod.

This commit also includes some other stuff:
- file 'onelua.c' added to the project
- opcode OP_PREPVARARG renamed to OP_VARARGPREP
- comparison opcodes rewritten through macros
 2019-03-22 13:37:17 -03:00
Roberto Ierusalimschy
84e32ad2eb Added opcodes for arithmetic with K operands 
Added opcodes for all seven arithmetic operators with K operands
(that is, operands that are numbers in the array of constants of
the function). They cover the cases of constant float operands
(e.g., 'x + .0.0', 'x^0.5') and large integer operands (e.g.,
'x % 10000').
 2018-11-23 12:23:45 -02:00
Roberto Ierusalimschy
a006514ea1 Big revamp in the implmentation of labels/gotos 
Added restriction that, when a label is created, there cannot be
another label with the same name visible. That allows backward goto's
to be resolved when they are read. Backward goto's get a close if
they jump out of the scope of some variable; labels get a close only
if previous goto to it jumps out of the scope of some upvalue.
 2018-10-29 14:26:48 -03:00
Roberto Ierusalimschy
4cd1f4aac0 Towards "to closed" local variables 
Start of the implementation of "scoped variables" or "to be closed"
variables, local variables whose '__close' (or themselves) are called
when they go out of scope. This commit implements the syntax, the
opcode, and the creation of the corresponding upvalue, but it still
does not call the finalizations when the variable goes out of scope
(the most important part).

Currently, the syntax is 'local scoped name = exp', but that will
probably change.
 2018-10-08 10:42:07 -03:00
Roberto Ierusalimschy
4d5de1c1fb Fixed bug in line info. when using 'not' operator 
When creating code for a jump on a 'not' condition, the code generator
was removing an instruction (the OP_NOT) without adjusting its
corresponding line information.

This fix also added tests for this case and extra functionality in
the test library to debug line info. structures.
 2018-07-11 12:53:23 -03:00
Roberto Ierusalimschy
03c6a05ec8 no more nil-in-table 2018-04-04 11:23:41 -03:00
Roberto Ierusalimschy
0c7738240e FALLTHROUGH comment must be last "statement" 
(so it does not work when inside a block)
 2018-03-16 11:22:09 -03:00
Roberto Ierusalimschy
4a1612ff9b new experimental syntax using reserved word 'undef' 2018-03-07 12:55:38 -03:00
Roberto Ierusalimschy
ef8263f81f better names for macros for tags and types. 
rttype -> rawtt; ttyperaw -> withvariant; ttype -> ttypetag;
tnov -> ttype
 2018-02-26 11:16:05 -03:00
Roberto Ierusalimschy
212095a601 new opcodes OP_GTI/OP_GEI 2018-02-21 12:49:32 -03:00
Roberto Ierusalimschy
465b474899 small reorganization of 'luaV_flttointeger'/'luaV_tointeger' 2018-02-21 09:54:26 -03:00
Roberto Ierusalimschy
49dae52d08 correct way to check stack space for vararg functions 2018-02-17 17:20:00 -02:00
Roberto Ierusalimschy
0682fe8169 some simplifications/optimizations in returns from Lua functions 2018-02-15 13:34:29 -02:00
Roberto Ierusalimschy
b1379936cf vararg back to '...' (but with another implementation) 
new implementation should have zero overhead for non-vararg functions
 2018-02-09 13:16:06 -02:00
Roberto Ierusalimschy
e2b15aa21d janitor work on casts 2018-01-28 13:13:26 -02:00
Roberto Ierusalimschy
5bd8d388de OP_CONCAT does not move its result (to simplify its execution) 2018-01-27 14:56:33 -02:00
Roberto Ierusalimschy
28f215ecf8 comments 2018-01-18 14:24:31 -02:00
Roberto Ierusalimschy
33e3774f44 keep more opcode arguments byte-aligned 2018-01-09 09:24:12 -02:00
Roberto Ierusalimschy
f360e7778b assert cannot use instruction after the last 2017-12-22 14:43:59 -02:00
Roberto Ierusalimschy
4676f6599e new macros 'isOT'/'isIT' 
(plus exchanged parameters of OP_VARARG to make it similar to other
'isOT' instructions)
 2017-12-22 12:16:46 -02:00
Roberto Ierusalimschy
ab07005568 new auxiliary function 'luaK_isKint' + removal of 'luaK_needclose', 
which was not being used anywhere.
 2017-12-18 13:44:44 -02:00
Roberto Ierusalimschy
f8c1c1469a some cleaning on signed opcode parameters 2017-12-15 16:53:48 -02:00
Roberto Ierusalimschy
e001d5aea6 'VRELOCABLE' -> 'VRELOC' 2017-12-14 12:24:02 -02:00
Roberto Ierusalimschy
86431a2f1c new opcodes BANDK/BORK/BXORK. (They do not use immediate operands 
because, too often, masks in bitwise operations are integers larger
than one byte.)
 2017-12-13 16:32:09 -02:00
Roberto Ierusalimschy
c7ee7fe026 new opcodes OP_SHLI/OP_SHRI 2017-12-04 15:41:30 -02:00
Roberto Ierusalimschy
ac78b914b6 warnings from Visual Studio /W3 2017-11-30 13:37:16 -02:00
Roberto Ierusalimschy
10b8c99bbb small peephole optimizations 2017-11-30 11:29:18 -02:00
Roberto Ierusalimschy
745eb41993 new opcodes OP_RETURN0/OP_RETURN1 2017-11-29 14:57:36 -02:00
Roberto Ierusalimschy
36aecd4548 order opcodes cannot use 'K' operands 2017-11-28 13:26:15 -02:00
Roberto Ierusalimschy
ff5fe51044 using register 'k' for conditions in tests (we only need one bit there) 2017-11-28 10:58:18 -02:00
Roberto Ierusalimschy
599f1742c6 detail (typo in comments) 2017-11-23 17:29:04 -02:00
Roberto Ierusalimschy
3c230cc825 using 'A' for register instead of 'B' in relational opcodes 
('R(A)' is already created by default for all instructions.)
 2017-11-22 17:15:44 -02:00
Roberto Ierusalimschy
41f2936d8f new opcode 'OP_EQI' for equality with immediate numbers 2017-11-22 16:41:20 -02:00
Roberto Ierusalimschy
4c0e36a46e new instruction 'OP_EQK' (for equality with constants) 2017-11-16 10:59:14 -02:00
Roberto Ierusalimschy
26679ea35b new function 'luaV_flttointeger' to convert floats to integers (without 
string coercions) + string operands to bitwise operations handled
by string metamethods
 2017-11-08 12:50:23 -02:00
Roberto Ierusalimschy
c3e5946fb2 new format for JUMP instructions (to allow larger offsets) 2017-11-07 15:20:42 -02:00
Roberto Ierusalimschy
a1ef58b3a5 eplicit 1-bit opcode operand 'k' 2017-10-04 18:56:32 -03:00
Roberto Ierusalimschy
8fbe9e3470 new opcodes with immediate integer operand for all arithmetic operations 2017-10-04 12:49:24 -03:00
Roberto Ierusalimschy
f3b3d9b5c2 string constants (Kstr) must fit into 'B' register 2017-10-02 19:50:57 -03:00
Roberto Ierusalimschy
bc1b0733b8 avoid the use of bit 'Bk' ('B' will lose this bit soon) 2017-10-01 16:13:43 -03:00
Roberto Ierusalimschy
722bdbe17d no more 'getBMode'-'getCMode' (imprecise + we will need more space 
for op mode) + better control of op modes
 2017-09-28 13:53:29 -03:00
Roberto Ierusalimschy
00e728af88 binary operators use R instead of RK 
faster + nobody uses RK(B), so B can be smaller (freeing one bit
for more opcodes, soon)
 2017-09-26 15:14:45 -03:00
Roberto Ierusalimschy
13256a4173 detail 
put explicit all cases for a switch of an enumeration
 2017-09-26 14:10:49 -03:00
Roberto Ierusalimschy
abb17cf19b new opcode OP_LOADF (load immediate float) 2017-09-19 15:38:14 -03:00
Roberto Ierusalimschy
80d9b09f35 jumps do not close upvalues (to be faster and simpler); 
explicit instruction to close upvalues; command 'break' not
handled like a 'goto' (to optimize removal of uneeded 'close'
instructions)
 2017-09-13 16:50:08 -03:00
Roberto Ierusalimschy
f96497397a new type 'StackValue' for stack elements 
(we may want to put extra info there in the future)
 2017-06-29 12:06:44 -03:00
Roberto Ierusalimschy
b42430fd3a 'lineinfo' in prototypes saved as differences instead of absolute 
values, so that the array can use bytes instead of ints, reducing
its size. (A new array 'abslineinfo' is used when line differences
do not fit in a byte.)
 2017-06-27 08:35:31 -03:00
Roberto Ierusalimschy
de74289049 table field names for dedicated opcodes can be restricted to 
small strings for slightly faster access
 2017-05-18 16:44:19 -03:00
Roberto Ierusalimschy
502a1d1108 new opcodes for table access with constant keys (strings and integers) 2017-04-28 17:57:45 -03:00
Roberto Ierusalimschy
173e41b2eb new opcode OP_ADDI (for immediate integer operand) (Experimental) 2017-04-26 14:46:52 -03:00
Roberto Ierusalimschy
a3f9c1a77a detail (using unsigned comparison in range check for LOADI) 2017-04-25 17:01:14 -03:00
Roberto Ierusalimschy
6dbae1b5d9 registers in a VINDEXED expression must be freed in order 2017-04-25 15:28:25 -03:00
Roberto Ierusalimschy
cb3d5dce30 opcodes 'OP_GETTABUP'/'OP_SETTABUP' operate only with string keys, 
so they can use fast-track table access
 2017-04-24 17:26:39 -03:00
Roberto Ierusalimschy
6a98aa0bb0 new opcode LOADI (for loading immediate integers) 2017-04-20 16:53:55 -03:00
Roberto Ierusalimschy
2a235312f0 detail (removing spaces at end of lines) 2016-12-22 11:08:50 -02:00
Roberto Ierusalimschy
fc6b32bcaa bug: Lua can generate wrong code in functions with too many constants 2016-07-19 14:12:07 -03:00
Roberto Ierusalimschy
6487fb11fc all 'static' variables should be 'const' 2016-06-20 16:12:46 -03:00
Roberto Ierusalimschy
fbd8614bdb comment (FALLTHROUGH) 2016-05-13 16:09:46 -03:00
Roberto Ierusalimschy
1f259be52a 'getcode' -> 'getinstruction' 2016-01-05 14:22:37 -02:00
Roberto Ierusalimschy
b12b635a90 more refactoring 2016-01-04 11:40:57 -02:00
Roberto Ierusalimschy
384d1b47b0 comments (*lots* of them) + asserts 2015-12-18 11:53:36 -02:00
Roberto Ierusalimschy
a01eba657e reordering of some functions + 'code_label' renamed to 'code_loadbool' 2015-12-17 13:02:44 -02:00
Roberto Ierusalimschy
b7446ea88d detail ('while' -> 'for') in 'luaK_patchclose' 2015-12-17 12:52:53 -02:00
Roberto Ierusalimschy
d103312661 details (typos in comments) 2015-11-19 17:16:22 -02:00
Roberto Ierusalimschy
82129b9266 use macro 'hasjumps' to test whether expression has jumps... 2015-10-26 12:27:47 -02:00
Roberto Ierusalimschy
a1935b9cba error message ("too complex" -> "too many registers") + MAXREGS 
changed to 255 (no reason not to use maximum allowed)
 2015-04-29 15:24:11 -03:00
Roberto Ierusalimschy
e723c75c02 details (avoid 'lint' warnings) 2015-03-28 16:14:47 -03:00
Roberto Ierusalimschy
8e5290d81e all "divisions" (div,idiv,mod) by zero are not folded, to avoid 
problems during compilation + does not fold zero results, as they
can collapse with -0.0 and the ANSI test to distinguish both needs
a division by zero (which we are trying to avoid) + removed macro
'luai_numinvalidop' (as its main use case were divisions by zero)
 2014-12-29 14:49:25 -02:00
Roberto Ierusalimschy
2b83711fba new macro 'nvalue' (to convert an object to a float when we know 
object is a number)
 2014-12-19 11:36:32 -02:00
Roberto Ierusalimschy
bf163ea7f0 bug ('#3' causes seg. fault in 5.3-beta) + comments + 'codearith' -> 
'codeexpval' (confusion about what operations function accept was
one of the reasons for the bug)
 2014-11-24 12:59:22 -02:00
Roberto Ierusalimschy
5fbd40dbe5 'x//y' extended to floats 2014-11-21 10:15:57 -02:00
Roberto Ierusalimschy
28fdbcf393 added include for 'lprefix.h', for stuff that must be added before 
any other header file
 2014-11-02 17:19:04 -02:00
Roberto Ierusalimschy
4542fb9f78 comments (a few extra quotes around identifiers) 2014-10-30 16:53:28 -02:00
Roberto Ierusalimschy
4b526045fa comment 2014-10-28 15:27:41 -02:00
Roberto Ierusalimschy
491103708e 'MAXSTACK' -> 'MAXREGS' and moved to 'lcode.c' (there is no reason 
to change that constant...)
 2014-10-27 14:29:58 -02:00
Roberto Ierusalimschy
bdf566a8a3 `name' in comments changed to 'name' 2014-10-25 09:50:46 -02:00
Roberto Ierusalimschy
42ff788e53 comments 2014-05-08 15:58:46 -03:00
Roberto Ierusalimschy
ffa43df3cd 'setnvalue' -> 'setfltvalue' (for consitency with 'fltvalue') 2014-04-29 15:14:16 -03:00
Roberto Ierusalimschy
e98ba351ce n^-m gives float result (instead of error) 2014-04-27 11:41:11 -03:00
Roberto Ierusalimschy
f61ceee708 LUAI_FUNC is being used only in header files 2014-04-02 13:44:42 -03:00
Roberto Ierusalimschy
607be77ec8 some details to avoid warnings 2014-04-01 11:39:55 -03:00
Roberto Ierusalimschy
da4811238a details (typos in comments) 2014-03-21 10:52:33 -03:00
Roberto Ierusalimschy
2aff75f58e small bug (from revision 2.80): LUA_OP* constants are not from 
enumeration 'Opcode' (they are integers)
 2014-03-09 16:21:34 -03:00
Roberto Ierusalimschy
cd12410195 new macro 'cast_void' 2014-03-07 13:19:00 -03:00
Roberto Ierusalimschy
5ff1c18a71 back with 'L' for macros 'luai_num*', but now with a new macro 
'luai_numinvalidop' to protect constant folding
 2014-03-06 13:15:18 -03:00
Roberto Ierusalimschy
99ac4a260f 'constfolding' passes a proper Lua state to 'luaO_arith' 2014-03-06 10:58:28 -03:00
Roberto Ierusalimschy
fa7e77fd38 detail ('codearith' uses 'LUA_OP*' constants instead of 'OP_*') 2014-03-06 10:39:05 -03:00
Roberto Ierusalimschy
19ad78d713 C++ needs casts for arithmetic with enums 2014-02-06 17:55:55 -02:00
Roberto Ierusalimschy
86dd8bf3f5 no more 'L' in macros "luai_num*" (several places that use those macros 
cannot throw errors anyway...)
 2014-01-27 11:34:32 -02:00
Roberto Ierusalimschy
1ea2d20f74 first implementation of '<<', '>>', and '~' (bitwise not) 2013-12-30 18:47:58 -02:00
Roberto Ierusalimschy
f5133aa1a5 small change in handling of unary operations 2013-12-18 16:44:42 -02:00
Roberto Ierusalimschy
c0edab0f6d first implementation of bitwise operators '&' (band), '|' (bor), 
and '~' (bxor)
 2013-12-18 12:12:03 -02:00
Roberto Ierusalimschy
a948054a19 new order for binary operations (grouping them by type of result) 2013-12-16 17:06:52 -02:00
Roberto Ierusalimschy
a8f8c7fd80 integer exponentiation with negative exponent is invalid 2013-12-16 12:30:22 -02:00
Roberto Ierusalimschy
8ef9e8460e bug (GC can collect long identifier during parser) + change (using 
a single constant table for all functions in a chunk)
 2013-08-30 13:01:37 -03:00
Roberto Ierusalimschy
483c2ccd0f avoid using raw representation of numbers for hashing, as number may 
not use all its space (e.g., long double can have sizeof=12 but
use only 10 bytes)
 2013-06-25 15:57:18 -03:00
Roberto Ierusalimschy
f45177f2d3 In the table that hashes constants, use a light userdata as keys 
to integer values to avoid collisions with floats with the same
numerical value
 2013-06-20 14:37:31 -03:00