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Use IRVariable's in IR code generation and implement tuples.

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This commit is contained in:
Daniel Kirchner
2020-02-12 12:36:14 +01:00
parent 6abe0a50b1
commit 3c9f18b749
20 changed files with 855 additions and 649 deletions
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libsolidity/codegen/ir/IRGeneratorForStatements.h
+26 -5
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@@ -22,6 +22,7 @@
#include <libsolidity/ast/ASTVisitor.h>
#include <libsolidity/codegen/ir/IRLValue.h>
#include <libsolidity/codegen/ir/IRVariable.h>
namespace solidity::frontend
{
@@ -75,12 +76,25 @@ private:
std::string fetchFreeMem() const;
/// Generates the required conversion code and @returns an IRVariable referring to the value of @a _variable
/// converted to type @a _to.
IRVariable convert(IRVariable const& _variable, Type const& _to);
/// @returns a Yul expression representing the current value of @a _expression,
/// converted to type @a _to if it does not yet have that type.
std::string expressionAsType(Expression const& _expression, Type const& _to);
std::ostream& defineExpression(Expression const& _expression);
/// Defines only one of many variables corresponding to an expression.
std::ostream& defineExpressionPart(Expression const& _expression, std::string const& _part);
/// @returns an output stream that can be used to define @a _var using a function call or
/// single stack slot expression.
std::ostream& define(IRVariable const& _var);
/// Defines @a _var using the value of @a _value while performing type conversions, if required.
void define(IRVariable const& _var, IRVariable const& _value) { declareAssign(_var, _value, true); }
/// Assigns @a _var to the value of @a _value while performing type conversions, if required.
void assign(IRVariable const& _var, IRVariable const& _value) { declareAssign(_var, _value, false); }
/// Declares variable @a _var.
void declare(IRVariable const& _var);
void declareAssign(IRVariable const& _var, IRVariable const& _value, bool _define);
void appendAndOrOperatorCode(BinaryOperation const& _binOp);
void appendSimpleUnaryOperation(UnaryOperation const& _operation, Expression const& _expr);
@@ -93,7 +107,14 @@ private:
std::string const& _right
);
void setLValue(Expression const& _expression, std::unique_ptr<IRLValue> _lvalue);
/// Assigns the value of @a _value to the lvalue @a _lvalue.
void writeToLValue(IRLValue const& _lvalue, IRVariable const& _value);
/// @returns a fresh IR variable containing the value of the lvalue @a _lvalue.
IRVariable readFromLValue(IRLValue const& _lvalue);
/// Stores the given @a _lvalue in m_currentLValue, if it will be written to (lValueRequested). Otherwise
/// defines the expression @a _expression by reading the value from @a _lvalue.
void setLValue(Expression const& _expression, IRLValue _lvalue);
void generateLoop(
Statement const& _body,
Expression const* _conditionExpression,
@@ -107,7 +128,7 @@ private:
std::ostringstream m_code;
IRGenerationContext& m_context;
YulUtilFunctions& m_utils;
std::unique_ptr<IRLValue> m_currentLValue;
std::optional<IRLValue> m_currentLValue;
};
}