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Implement inline assembly access to constants.

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This commit is contained in:
chriseth 2020-11-11 18:59:00 +01:00
parent 9f0a631948
commit 1508b08f3e
4 changed files with 50 additions and 2 deletions
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46
libsolidity/codegen/ir/IRGeneratorForStatements.cpp
View File

@ -30,6 +30,7 @@
#include <libsolidity/codegen/CompilerUtils.h>
#include <libsolidity/codegen/ReturnInfo.h>
#include <libsolidity/ast/TypeProvider.h>
#include <libsolidity/ast/ASTUtils.h>
#include <libevmasm/GasMeter.h>
@ -110,7 +111,7 @@ private:
solUnimplementedAssert(varDecl, "");
string const& suffix = reference.suffix;
if (suffix.empty())
if (suffix.empty() && !varDecl->isStateVariable())
{
auto const& var = m_context.localVariable(*varDecl);
solAssert(var.type().sizeOnStack() == 1, "");
@ -122,7 +123,48 @@ private:
}
string value;
if (varDecl->isStateVariable())
if (varDecl->isConstant())
{
VariableDeclaration const* variable = rootConstVariableDeclaration(*varDecl);
solAssert(variable, "");
if (variable->value()->annotation().type->category() == Type::Category::RationalNumber)
{
u256 intValue = dynamic_cast<RationalNumberType const&>(*variable->value()->annotation().type).literalValue(nullptr);
if (auto const* bytesType = dynamic_cast<FixedBytesType const*>(variable->type()))
intValue <<= 256 - 8 * bytesType->numBytes();
else
solAssert(variable->type()->category() == Type::Category::Integer, "");
value = intValue.str();
}
else if (auto const* literal = dynamic_cast<Literal const*>(variable->value().get()))
{
TypePointer type = literal->annotation().type;
switch (type->category())
{
case Type::Category::Bool:
case Type::Category::Address:
solAssert(type->category() == variable->annotation().type->category(), "");
value = toCompactHexWithPrefix(type->literalValue(literal));
break;
case Type::Category::StringLiteral:
{
auto const& stringLiteral = dynamic_cast<StringLiteralType const&>(*type);
solAssert(variable->type()->category() == Type::Category::FixedBytes, "");
unsigned const numBytes = dynamic_cast<FixedBytesType const&>(*variable->type()).numBytes();
solAssert(stringLiteral.value().size() <= numBytes, "");
value = formatNumber(u256(h256(stringLiteral.value(), h256::AlignLeft)));
break;
}
default:
solAssert(false, "");
}
}
else
solAssert(false, "Invalid constant in inline assembly.");
}
else if (varDecl->isStateVariable())
{
if (suffix == "slot")
value = m_context.storageLocationOfStateVariable(*varDecl).first.str();

2
test/libsolidity/semanticTests/constants/asm_address_constant_regression.sol
View File

@ -8,5 +8,7 @@ contract C {
}
}
// ====
// compileViaYul: also
// ----
// f() -> 0x00

2
test/libsolidity/semanticTests/inlineAssembly/constant_access.sol
View File

@ -14,5 +14,7 @@ contract C {
}
}
}
// ====
// compileViaYul: also
// ----
// f() -> 2, left(0xabcd), left(0x616263), true, 0x1212121212121212121212121212121212121212

2
test/libsolidity/semanticTests/inlineAssembly/constant_access_referencing.sol
View File

@ -22,5 +22,7 @@ contract C {
}
}
}
// ====
// compileViaYul: also
// ----
// f() -> 2, left(0xabcd), left(0x616263), true, 0x1212121212121212121212121212121212121212