Package serp.bytecode
Class ConvertInstruction
java.lang.Object
serp.bytecode.Instruction
serp.bytecode.TypedInstruction
serp.bytecode.ConvertInstruction
- All Implemented Interfaces:
BCEntity
,VisitAcceptor
A conversion opcode such as
i2l, f2i
, etc.
Changing the types of the instruction will automatically
update the underlying opcode. Converting from one type to the same
type will result in a nop
.- Author:
- Abe White
-
Method Summary
Modifier and TypeMethodDescriptionvoid
acceptVisit
(BCVisitor visit) Accept a visit from aBCVisitor
, calling the appropriate methods to notify the visitor that it has entered this entity, and to provide it with the proper callbacks for each sub-entity owned by this one.boolean
equalsInstruction
(Instruction other) ConvertInstructions are equal if the types they convert between are either equal or unset.Return theClass
of the type being converted from.Return the bytecode of the type being converted from.Return the name of the type being converted from.int
Return the logical number of stack positions changed by this instruction.int
Return the number of stack positions this instruction pushes or pops during its execution.Return the type name for this instruction.setFromType
(Class type) Set the type being converted from.setFromType
(String type) Set the type being converted from.setFromType
(BCClass type) Set the type being converted from.Set the type of this instruction.Methods inherited from class serp.bytecode.TypedInstruction
getType, getTypeBC, setType, setType
Methods inherited from class serp.bytecode.Instruction
getByteIndex, getClassLoader, getCode, getLineNumber, getName, getOpcode, getPool, getProject, isValid
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Method Details
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getLogicalStackChange
public int getLogicalStackChange()Description copied from class:Instruction
Return the logical number of stack positions changed by this instruction. In other words, ignore weirdness with longs and doubles taking two stack positions.- Overrides:
getLogicalStackChange
in classInstruction
-
getStackChange
public int getStackChange()Description copied from class:Instruction
Return the number of stack positions this instruction pushes or pops during its execution.- Overrides:
getStackChange
in classInstruction
- Returns:
- 0 if the stack is not affected by this instruction, a positive number if it pushes onto the stack, and a negative number if it pops from the stack
-
getTypeName
Description copied from class:TypedInstruction
Return the type name for this instruction. If the type has not been set, this method will return null.- Specified by:
getTypeName
in classTypedInstruction
-
setType
Description copied from class:TypedInstruction
Set the type of this instruction. Types that have no direct support will be converted accordingly.- Specified by:
setType
in classTypedInstruction
- Returns:
- this instruction, for method chaining
-
getFromTypeName
Return the name of the type being converted from. If neither type has been set, this method will return null. -
getFromType
Return theClass
of the type being converted from. If neither type has been set, this method will return null. -
getFromTypeBC
Return the bytecode of the type being converted from. If neither type has been set, this method will return null. -
setFromType
Set the type being converted from. Types that have no direct support will be converted accordingly.- Returns:
- this instruction, for method chaining
-
setFromType
Set the type being converted from. Types that have no direct support will be converted accordingly.- Returns:
- this instruction, for method chaining
-
setFromType
Set the type being converted from. Types that have no direct support will be converted accordingly.- Returns:
- this instruction, for method chaining
-
equalsInstruction
ConvertInstructions are equal if the types they convert between are either equal or unset.- Overrides:
equalsInstruction
in classInstruction
-
acceptVisit
Description copied from interface:VisitAcceptor
Accept a visit from aBCVisitor
, calling the appropriate methods to notify the visitor that it has entered this entity, and to provide it with the proper callbacks for each sub-entity owned by this one.- Specified by:
acceptVisit
in interfaceVisitAcceptor
- Overrides:
acceptVisit
in classInstruction
-