Subtraction of small constant integers optimized with OP_ADDI

testes/bitwise.lua

@@ -60,9 +60,9 @@ assert("1234.0" << "5.0" == 1234 * 32)
 assert("0xffff.0" ~ "0xAAAA" == 0x5555)
 assert(~"0x0.000p4" == -1)
 
-assert("7" .. 3 << 1 == 146)
-assert(10 >> 1 .. "9" == 0)
-assert(10 | 1 .. "9" == 27)
+assert(("7" .. 3) << 1 == 146)
+assert(0xffffffff >> (1 .. "9") == 0x1fff)
+assert(10 | (1 .. "9") == 27)
 
 do
   local st, msg = pcall(function () return 4 & "a" end)

testes/code.lua

@@ -293,6 +293,7 @@ checkK(function () return -(border + 1) end, -(sbx + 1.0))
 
 -- immediate operands
 checkR(function (x) return x + k1 end, 10, 11, 'ADDI', 'MMBINI', 'RETURN1')
+checkR(function (x) return x - 127 end, 10, -117, 'ADDI', 'MMBINI', 'RETURN1')
 checkR(function (x) return 128 + x end, 0.0, 128.0,
          'ADDI', 'MMBINI', 'RETURN1')
 checkR(function (x) return x * -127 end, -1.0, 127.0,

testes/locals.lua

@@ -82,7 +82,7 @@ assert(c.a == nil)
 f()
 assert(c.a == 3)
 
--- old test for limits for special instructions (now just a generic test)
+-- old test for limits for special instructions
 do
   local i = 2
   local p = 4    -- p == 2^i