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https://github.com/lua/lua
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b2a580bdb1
- Several details in 'lcode.c'
- A few more tests for code generation
- Bug in assert in 'lcode.c' ("=" x "==")
- Comments in 'lopcodes.h' and 'ltable.c'
444 lines
13 KiB
Lua
444 lines
13 KiB
Lua
-- $Id: testes/code.lua $
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-- See Copyright Notice in file all.lua
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if T==nil then
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(Message or print)('\n >>> testC not active: skipping opcode tests <<<\n')
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return
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end
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print "testing code generation and optimizations"
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-- to test constant propagation
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local k0aux <const> = 0
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local k0 <const> = k0aux
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local k1 <const> = 1
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local k3 <const> = 3
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local k6 <const> = k3 + (k3 << k0)
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local kFF0 <const> = 0xFF0
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local k3_78 <const> = 3.78
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local x, k3_78_4 <const> = 10, k3_78 / 4
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assert(x == 10)
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local kx <const> = "x"
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local kTrue <const> = true
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local kFalse <const> = false
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local kNil <const> = nil
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-- this code gave an error for the code checker
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do
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local function f (a)
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for k,v,w in a do end
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end
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end
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-- testing reuse in constant table
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local function checkKlist (func, list)
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local k = T.listk(func)
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assert(#k == #list)
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for i = 1, #k do
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assert(k[i] == list[i] and math.type(k[i]) == math.type(list[i]))
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end
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end
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local function foo ()
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local a
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a = k3;
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a = 0; a = 0.0; a = -7 + 7
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a = k3_78/4; a = k3_78_4
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a = -k3_78/4; a = k3_78/4; a = -3.78/4
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a = -3.79/4; a = 0.0; a = -0;
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a = k3; a = 3.0; a = 3; a = 3.0
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end
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checkKlist(foo, {3.78/4, -3.78/4, -3.79/4})
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-- testing opcodes
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-- check that 'f' opcodes match '...'
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function check (f, ...)
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local arg = {...}
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local c = T.listcode(f)
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for i=1, #arg do
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local opcode = string.match(c[i], "%u%w+")
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-- print(arg[i], opcode)
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assert(arg[i] == opcode)
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end
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assert(c[#arg+2] == undef)
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end
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-- check that 'f' opcodes match '...' and that 'f(p) == r'.
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function checkR (f, p, r, ...)
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local r1 = f(p)
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assert(r == r1 and math.type(r) == math.type(r1))
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check(f, ...)
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end
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-- check that 'a' and 'b' has the same opcodes
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function checkequal (a, b)
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a = T.listcode(a)
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b = T.listcode(b)
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assert(#a == #b)
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for i = 1, #a do
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a[i] = string.gsub(a[i], '%b()', '') -- remove line number
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b[i] = string.gsub(b[i], '%b()', '') -- remove line number
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assert(a[i] == b[i])
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end
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end
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-- some basic instructions
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check(function () -- function does not create upvalues
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(function () end){f()}
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end, 'CLOSURE', 'NEWTABLE', 'EXTRAARG', 'GETTABUP', 'CALL',
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'SETLIST', 'CALL', 'RETURN0')
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check(function (x) -- function creates upvalues
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(function () return x end){f()}
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end, 'CLOSURE', 'NEWTABLE', 'EXTRAARG', 'GETTABUP', 'CALL',
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'SETLIST', 'CALL', 'RETURN')
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-- sequence of LOADNILs
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check(function ()
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local kNil <const> = nil
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local a,b,c
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local d; local e;
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local f,g,h;
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d = nil; d=nil; b=nil; a=kNil; c=nil;
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end, 'LOADNIL', 'RETURN0')
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check(function ()
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local a,b,c,d = 1,1,1,1
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d=nil;c=nil;b=nil;a=nil
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end, 'LOADI', 'LOADI', 'LOADI', 'LOADI', 'LOADNIL', 'RETURN0')
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do
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local a,b,c,d = 1,1,1,1
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d=nil;c=nil;b=nil;a=nil
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assert(a == nil and b == nil and c == nil and d == nil)
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end
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-- single return
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check (function (a,b,c) return a end, 'RETURN1')
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-- infinite loops
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check(function () while kTrue do local a = -1 end end,
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'LOADI', 'JMP', 'RETURN0')
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check(function () while 1 do local a = -1 end end,
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'LOADI', 'JMP', 'RETURN0')
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check(function () repeat local x = 1 until true end,
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'LOADI', 'RETURN0')
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-- concat optimization
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check(function (a,b,c,d) return a..b..c..d end,
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'MOVE', 'MOVE', 'MOVE', 'MOVE', 'CONCAT', 'RETURN1')
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-- not
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check(function () return not not nil end, 'LOADBOOL', 'RETURN1')
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check(function () return not not kFalse end, 'LOADBOOL', 'RETURN1')
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check(function () return not not true end, 'LOADBOOL', 'RETURN1')
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check(function () return not not k3 end, 'LOADBOOL', 'RETURN1')
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-- direct access to locals
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check(function ()
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local a,b,c,d
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a = b*a
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c.x, a[b] = -((a + d/b - a[b]) ^ a.x), b
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end,
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'LOADNIL',
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'MUL', 'MMBIN',
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'DIV', 'MMBIN', 'ADD', 'MMBIN', 'GETTABLE', 'SUB', 'MMBIN',
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'GETFIELD', 'POW', 'MMBIN', 'UNM', 'SETTABLE', 'SETFIELD', 'RETURN0')
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-- direct access to constants
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check(function ()
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local a,b
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local c = kNil
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a[kx] = 3.2
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a.x = b
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a[b] = 'x'
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end,
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'LOADNIL', 'SETFIELD', 'SETFIELD', 'SETTABLE', 'RETURN0')
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-- "get/set table" with numeric indices
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check(function (a)
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local k255 <const> = 255
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a[1] = a[100]
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a[k255] = a[256]
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a[256] = 5
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end,
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'GETI', 'SETI',
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'LOADI', 'GETTABLE', 'SETI',
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'LOADI', 'SETTABLE', 'RETURN0')
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check(function ()
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local a,b
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a = a - a
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b = a/a
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b = 5-4
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end,
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'LOADNIL', 'SUB', 'MMBIN', 'DIV', 'MMBIN', 'LOADI', 'RETURN0')
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check(function ()
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local a,b
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a[kTrue] = false
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end,
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'LOADNIL', 'LOADBOOL', 'SETTABLE', 'RETURN0')
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-- equalities
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checkR(function (a) if a == 1 then return 2 end end, 1, 2,
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'EQI', 'JMP', 'LOADI', 'RETURN1')
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checkR(function (a) if -4.0 == a then return 2 end end, -4, 2,
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'EQI', 'JMP', 'LOADI', 'RETURN1')
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checkR(function (a) if a == "hi" then return 2 end end, 10, nil,
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'EQK', 'JMP', 'LOADI', 'RETURN1')
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checkR(function (a) if a == 10000 then return 2 end end, 1, nil,
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'EQK', 'JMP', 'LOADI', 'RETURN1') -- number too large
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checkR(function (a) if -10000 == a then return 2 end end, -10000, 2,
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'EQK', 'JMP', 'LOADI', 'RETURN1') -- number too large
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-- comparisons
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checkR(function (a) if -10 <= a then return 2 end end, -10, 2,
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'GEI', 'JMP', 'LOADI', 'RETURN1')
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checkR(function (a) if 128.0 > a then return 2 end end, 129, nil,
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'LTI', 'JMP', 'LOADI', 'RETURN1')
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checkR(function (a) if -127.0 < a then return 2 end end, -127, nil,
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'GTI', 'JMP', 'LOADI', 'RETURN1')
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checkR(function (a) if 10 < a then return 2 end end, 11, 2,
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'GTI', 'JMP', 'LOADI', 'RETURN1')
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checkR(function (a) if 129 < a then return 2 end end, 130, 2,
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'LOADI', 'LT', 'JMP', 'LOADI', 'RETURN1')
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checkR(function (a) if a >= 23.0 then return 2 end end, 25, 2,
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'GEI', 'JMP', 'LOADI', 'RETURN1')
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checkR(function (a) if a >= 23.1 then return 2 end end, 0, nil,
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'LOADK', 'LE', 'JMP', 'LOADI', 'RETURN1')
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checkR(function (a) if a > 2300.0 then return 2 end end, 0, nil,
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'LOADF', 'LT', 'JMP', 'LOADI', 'RETURN1')
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-- constant folding
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local function checkK (func, val)
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check(func, 'LOADK', 'RETURN1')
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checkKlist(func, {val})
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assert(func() == val)
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end
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local function checkI (func, val)
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check(func, 'LOADI', 'RETURN1')
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checkKlist(func, {})
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assert(func() == val)
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end
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local function checkF (func, val)
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check(func, 'LOADF', 'RETURN1')
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checkKlist(func, {})
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assert(func() == val)
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end
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checkF(function () return 0.0 end, 0.0)
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checkI(function () return k0 end, 0)
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checkI(function () return -k0//1 end, 0)
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checkK(function () return 3^-1 end, 1/3)
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checkK(function () return (1 + 1)^(50 + 50) end, 2^100)
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checkK(function () return (-2)^(31 - 2) end, -0x20000000 + 0.0)
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checkF(function () return (-k3^0 + 5) // 3.0 end, 1.0)
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checkI(function () return -k3 % 5 end, 2)
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checkF(function () return -((2.0^8 + -(-1)) % 8)/2 * 4 - 3 end, -5.0)
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checkF(function () return -((2^8 + -(-1)) % 8)//2 * 4 - 3 end, -7.0)
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checkI(function () return 0xF0.0 | 0xCC.0 ~ 0xAA & 0xFD end, 0xF4)
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checkI(function () return ~(~kFF0 | kFF0) end, 0)
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checkI(function () return ~~-1024.0 end, -1024)
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checkI(function () return ((100 << k6) << -4) >> 2 end, 100)
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-- borders around MAXARG_sBx ((((1 << 17) - 1) >> 1) == 65535)
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local a = 17; local sbx = ((1 << a) - 1) >> 1 -- avoid folding
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local border <const> = 65535
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checkI(function () return border end, sbx)
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checkI(function () return -border end, -sbx)
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checkI(function () return border + 1 end, sbx + 1)
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checkK(function () return border + 2 end, sbx + 2)
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checkK(function () return -(border + 1) end, -(sbx + 1))
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local border <const> = 65535.0
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checkF(function () return border end, sbx + 0.0)
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checkF(function () return -border end, -sbx + 0.0)
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checkF(function () return border + 1 end, (sbx + 1.0))
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checkK(function () return border + 2 end, (sbx + 2.0))
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checkK(function () return -(border + 1) end, -(sbx + 1.0))
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-- immediate operands
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checkR(function (x) return x + k1 end, 10, 11, 'ADDI', 'MMBINI', 'RETURN1')
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checkR(function (x) return x - 127 end, 10, -117, 'ADDI', 'MMBINI', 'RETURN1')
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checkR(function (x) return 128 + x end, 0.0, 128.0,
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'ADDI', 'MMBINI', 'RETURN1')
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checkR(function (x) return x * -127 end, -1.0, 127.0,
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'MULK', 'MMBINK', 'RETURN1')
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checkR(function (x) return 20 * x end, 2, 40, 'MULK', 'MMBINK', 'RETURN1')
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checkR(function (x) return x ^ -2 end, 2, 0.25, 'POWK', 'MMBINK', 'RETURN1')
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checkR(function (x) return x / 40 end, 40, 1.0, 'DIVK', 'MMBINK', 'RETURN1')
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checkR(function (x) return x // 1 end, 10.0, 10.0,
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'IDIVK', 'MMBINK', 'RETURN1')
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checkR(function (x) return x % (100 - 10) end, 91, 1,
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'MODK', 'MMBINK', 'RETURN1')
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checkR(function (x) return k1 << x end, 3, 8, 'SHLI', 'MMBINI', 'RETURN1')
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checkR(function (x) return x << 127 end, 10, 0, 'SHRI', 'MMBINI', 'RETURN1')
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checkR(function (x) return x << -127 end, 10, 0, 'SHRI', 'MMBINI', 'RETURN1')
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checkR(function (x) return x >> 128 end, 8, 0, 'SHRI', 'MMBINI', 'RETURN1')
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checkR(function (x) return x >> -127 end, 8, 0, 'SHRI', 'MMBINI', 'RETURN1')
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checkR(function (x) return x & 1 end, 9, 1, 'BANDK', 'MMBINK', 'RETURN1')
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checkR(function (x) return 10 | x end, 1, 11, 'BORK', 'MMBINK', 'RETURN1')
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checkR(function (x) return -10 ~ x end, -1, 9, 'BXORK', 'MMBINK', 'RETURN1')
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-- K operands in arithmetic operations
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checkR(function (x) return x + 0.0 end, 1, 1.0, 'ADDK', 'MMBINK', 'RETURN1')
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-- check(function (x) return 128 + x end, 'ADDK', 'MMBINK', 'RETURN1')
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checkR(function (x) return x * -10000 end, 2, -20000,
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'MULK', 'MMBINK', 'RETURN1')
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-- check(function (x) return 20 * x end, 'MULK', 'MMBINK', 'RETURN1')
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checkR(function (x) return x ^ 0.5 end, 4, 2.0, 'POWK', 'MMBINK', 'RETURN1')
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checkR(function (x) return x / 2.0 end, 4, 2.0, 'DIVK', 'MMBINK', 'RETURN1')
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checkR(function (x) return x // 10000 end, 10000, 1,
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'IDIVK', 'MMBINK', 'RETURN1')
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checkR(function (x) return x % (100.0 - 10) end, 91, 1.0,
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'MODK', 'MMBINK', 'RETURN1')
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-- no foldings (and immediate operands)
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check(function () return -0.0 end, 'LOADF', 'UNM', 'RETURN1')
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check(function () return k3/0 end, 'LOADI', 'DIVK', 'MMBINK', 'RETURN1')
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check(function () return 0%0 end, 'LOADI', 'MODK', 'MMBINK', 'RETURN1')
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check(function () return -4//0 end, 'LOADI', 'IDIVK', 'MMBINK', 'RETURN1')
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check(function (x) return x >> 2.0 end, 'LOADF', 'SHR', 'MMBIN', 'RETURN1')
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check(function (x) return x << 128 end, 'LOADI', 'SHL', 'MMBIN', 'RETURN1')
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check(function (x) return x & 2.0 end, 'LOADF', 'BAND', 'MMBIN', 'RETURN1')
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-- basic 'for' loops
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check(function () for i = -10, 10.5 do end end,
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'LOADI', 'LOADK', 'LOADI', 'FORPREP', 'FORLOOP', 'RETURN0')
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check(function () for i = 0xfffffff, 10.0, 1 do end end,
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'LOADK', 'LOADF', 'LOADI', 'FORPREP', 'FORLOOP', 'RETURN0')
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-- bug in constant folding for 5.1
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check(function () return -nil end, 'LOADNIL', 'UNM', 'RETURN1')
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check(function ()
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local a,b,c
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b[c], a = c, b
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b[a], a = c, b
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a, b = c, a
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a = a
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end,
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'LOADNIL',
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'MOVE', 'MOVE', 'SETTABLE',
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'MOVE', 'MOVE', 'MOVE', 'SETTABLE',
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'MOVE', 'MOVE', 'MOVE',
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-- no code for a = a
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'RETURN0')
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-- x == nil , x ~= nil
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-- checkequal(function (b) if (a==nil) then a=1 end; if a~=nil then a=1 end end,
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-- function () if (a==9) then a=1 end; if a~=9 then a=1 end end)
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-- check(function () if a==nil then a='a' end end,
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-- 'GETTABUP', 'EQ', 'JMP', 'SETTABUP', 'RETURN')
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do -- tests for table access in upvalues
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local t
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check(function () t[kx] = t.y end, 'GETTABUP', 'SETTABUP')
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check(function (a) t[a()] = t[a()] end,
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'MOVE', 'CALL', 'GETUPVAL', 'MOVE', 'CALL',
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'GETUPVAL', 'GETTABLE', 'SETTABLE')
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end
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-- de morgan
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checkequal(function () local a; if not (a or b) then b=a end end,
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function () local a; if (not a and not b) then b=a end end)
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checkequal(function (l) local a; return 0 <= a and a <= l end,
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function (l) local a; return not (not(a >= 0) or not(a <= l)) end)
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-- if-break optimizations
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check(function (a, b)
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while a do
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if b then break else a = a + 1 end
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end
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end,
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'TEST', 'JMP', 'TEST', 'JMP', 'ADDI', 'MMBINI', 'JMP', 'RETURN0')
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checkequal(
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function (a) while a < 10 do a = a + 1 end end,
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function (a)
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::loop::
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if not (a < 10) then goto exit end
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a = a + 1
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goto loop
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::exit::
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end
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)
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checkequal(
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function (a) repeat local x = a + 1; a = x until a > 0 end,
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function (a)
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::loop:: do
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local x = a + 1
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a = x
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end
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if not (a > 0) then goto loop end
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end
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)
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checkequal(function () return 6 or true or nil end,
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function () return k6 or kTrue or kNil end)
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checkequal(function () return 6 and true or nil end,
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function () return k6 and kTrue or kNil end)
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do -- string constants
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local k0 <const> = "00000000000000000000000000000000000000000000000000"
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local function f1 ()
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local k <const> = k0
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return function ()
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return function () return k end
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end
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end
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local f2 = f1()
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local f3 = f2()
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assert(f3() == k0)
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checkK(f3, k0)
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-- string is not needed by other functions
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assert(T.listk(f1)[1] == nil)
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assert(T.listk(f2)[1] == nil)
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end
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print 'OK'
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