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constant fold string comparisons

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This commit is contained in:
birds3345 2024-07-12 01:33:12 -04:00
parent 6bfc38e61a
commit 931d8d619d
1 changed files with 22 additions and 0 deletions
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22
Compiler/src/ConstantFolding.cpp
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@ -6,6 +6,8 @@
#include <vector>
#include <math.h>
LUAU_FASTFLAGVARIABLE(LuauConstantFoldStringComparisons, false)
namespace Luau
{
namespace Compile
@ -157,6 +159,11 @@ static void foldBinary(Constant& result, AstExprBinary::Op op, const Constant& l
result.type = Constant::Type_Boolean;
result.valueBoolean = la.valueNumber < ra.valueNumber;
}
else if (FFlag::LuauConstantFoldStringComparisons && la.type == Constant::Type_String && ra.type == Constant::Type_String)
{
result.type = Constant::Type_Boolean;
result.valueBoolean = strcmp(la.valueString, ra.valueString) < 0;
}
break;
case AstExprBinary::CompareLe:
@ -165,6 +172,11 @@ static void foldBinary(Constant& result, AstExprBinary::Op op, const Constant& l
result.type = Constant::Type_Boolean;
result.valueBoolean = la.valueNumber <= ra.valueNumber;
}
else if (FFlag::LuauConstantFoldStringComparisons && la.type == Constant::Type_String && ra.type == Constant::Type_String)
{
result.type = Constant::Type_Boolean;
result.valueBoolean = strcmp(la.valueString, ra.valueString) <= 0;
}
break;
case AstExprBinary::CompareGt:
@ -173,6 +185,11 @@ static void foldBinary(Constant& result, AstExprBinary::Op op, const Constant& l
result.type = Constant::Type_Boolean;
result.valueBoolean = la.valueNumber > ra.valueNumber;
}
else if (FFlag::LuauConstantFoldStringComparisons && la.type == Constant::Type_String && ra.type == Constant::Type_String)
{
result.type = Constant::Type_Boolean;
result.valueBoolean = strcmp(la.valueString, ra.valueString) > 0;
}
break;
case AstExprBinary::CompareGe:
@ -181,6 +198,11 @@ static void foldBinary(Constant& result, AstExprBinary::Op op, const Constant& l
result.type = Constant::Type_Boolean;
result.valueBoolean = la.valueNumber >= ra.valueNumber;
}
else if (FFlag::LuauConstantFoldStringComparisons && la.type == Constant::Type_String && ra.type == Constant::Type_String)
{
result.type = Constant::Type_Boolean;
result.valueBoolean = strcmp(la.valueString, ra.valueString) >= 0;
}
break;
case AstExprBinary::And: