luau-lang/luau
1
0
Fork 0
mirror of https://github.com/luau-lang/luau.git synced 2025-04-10 22:00:54 +01:00
Code Issues Projects Releases Packages Wiki Activity

Fold length operations when argument is a constant string (#141)

Browse source 
Co-authored-by: Arseny Kapoulkine <arseny.kapoulkine@gmail.com>
This commit is contained in:
bmcq-0 2021-11-05 16:24:30 -04:00 • committed by GitHub
parent a80fc93646
commit ad9b47b72f
Signed by: DevComp
GPG key ID: 4AEE18F83AFDEB23
2 changed files with 16 additions and 0 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

5
Compiler/src/Compiler.cpp
View file

@ -2900,6 +2900,11 @@ struct Compiler
break; break;
case AstExprUnary::Len: case AstExprUnary::Len:
if (arg.type == Constant::Type_String)
{
result.type = Constant::Type_Number;
result.valueNumber = double(arg.valueString.size);
}
break; break;
default: default:

11
tests/Compiler.test.cpp
View file

@ -1168,6 +1168,17 @@ RETURN R0 1
)"); )");
} }
TEST_CASE("ConstantFoldStringLen")
{
CHECK_EQ("\n" + compileFunction0("return #'string', #'', #'a', #('b')"), R"(
LOADN R0 6
LOADN R1 0
LOADN R2 1
LOADN R3 1
RETURN R0 4
)");
}
TEST_CASE("ConstantFoldCompare") TEST_CASE("ConstantFoldCompare")
{ {
// ordered comparisons // ordered comparisons