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Refactor conversion function.

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This commit is contained in:
chriseth
2021-08-05 11:48:35 +02:00
parent 26fb2317ef
commit 6b888b531b
3 changed files with 37 additions and 43 deletions
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libsolidity/codegen/YulUtilFunctions.cpp
+18 -32
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@@ -3258,6 +3258,7 @@ string YulUtilFunctions::conversionFunction(Type const& _from, Type const& _to)
switch (fromCategory)
{
case Type::Category::Address:
case Type::Category::Contract:
body =
Whiskers("converted := <convert>(value)")
("convert", conversionFunction(IntegerType(160), _to))
@@ -3265,61 +3266,44 @@ string YulUtilFunctions::conversionFunction(Type const& _from, Type const& _to)
break;
case Type::Category::Integer:
case Type::Category::RationalNumber:
case Type::Category::Contract:
{
solAssert(_from.mobileType(), "");
if (RationalNumberType const* rational = dynamic_cast<RationalNumberType const*>(&_from))
solUnimplementedAssert(!rational->isFractional(), "Not yet implemented - FixedPointType.");
if (rational->isFractional())
solAssert(toCategory == Type::Category::FixedPoint, "");
if (toCategory == Type::Category::FixedBytes)
{
solAssert(
fromCategory == Type::Category::Integer || fromCategory == Type::Category::RationalNumber,
"Invalid conversion to FixedBytesType requested."
);
FixedBytesType const& toBytesType = dynamic_cast<FixedBytesType const&>(_to);
body =
Whiskers("converted := <shiftLeft>(<clean>(value))")
("shiftLeft", shiftLeftFunction(256 - toBytesType.numBytes() * 8))
("clean", cleanupFunction(_from))
.render();
("shiftLeft", shiftLeftFunction(256 - toBytesType.numBytes() * 8))
("clean", cleanupFunction(_from))
.render();
}
else if (toCategory == Type::Category::Enum)
{
solAssert(_from.mobileType(), "");
body =
Whiskers("converted := <cleanEnum>(<cleanInt>(value))")
("cleanEnum", cleanupFunction(_to))
// "mobileType()" returns integer type for rational
("cleanInt", cleanupFunction(*_from.mobileType()))
("cleanInt", cleanupFunction(_from))
.render();
}
else if (toCategory == Type::Category::FixedPoint)
solUnimplemented("Not yet implemented - FixedPointType.");
else if (toCategory == Type::Category::Address)
else if (toCategory == Type::Category::Address || toCategory == Type::Category::Contract)
body =
Whiskers("converted := <convert>(value)")
("convert", conversionFunction(_from, IntegerType(160)))
.render();
else
("convert", conversionFunction(_from, IntegerType(160)))
.render();
else if (toCategory == Type::Category::Integer)
{
solAssert(
toCategory == Type::Category::Integer ||
toCategory == Type::Category::Contract,
"");
IntegerType const addressType(160);
IntegerType const& to =
toCategory == Type::Category::Integer ?
dynamic_cast<IntegerType const&>(_to) :
addressType;
IntegerType const& to = dynamic_cast<IntegerType const&>(_to);
// Clean according to the "to" type, except if this is
// a widening conversion.
IntegerType const* cleanupType = &to;
if (fromCategory != Type::Category::RationalNumber)
if (fromCategory == Type::Category::Integer)
{
IntegerType const& from =
fromCategory == Type::Category::Integer ?
dynamic_cast<IntegerType const&>(_from) :
addressType;
IntegerType const& from = dynamic_cast<IntegerType const&>(_from);
if (to.numBits() > from.numBits())
cleanupType = &from;
}
@@ -3328,6 +3312,8 @@ string YulUtilFunctions::conversionFunction(Type const& _from, Type const& _to)
("cleanInt", cleanupFunction(*cleanupType))
.render();
}
else
solAssert(false, "");
break;
}
case Type::Category::Bool: