Vector_Select_Instruction

class Vector_Select_Instruction (concrete, logical)

GNU language extension: The ternary ?: operator applied to vector types. All three operands are always evaluated. The condition vector determines which elements in the result vector are taken from the Then_Branch/Else_Branch input vectors.

Direct parents:
Ancestor classes and implemented interfaces:

Execution_Node, Instruction, Logical_IR_Root

Field

Kind

Type

Description

Condition

syntactic

interface Reading_Or_Address_Operand_Interface

Then_Branch

syntactic

interface Reading_Or_Address_Operand_Interface

Else_Branch

syntactic

interface Reading_Or_Address_Operand_Interface

Left (from Instruction)

syntactic

class Operand

Where the result will be stored. This is always a write operand. (can be NULL, e.g., for calls to void funcs or assertion instructions. Check cafe’s can_omit_lhs() for the full list of instructions that can have Left equal to NoNode.)

Left_Physical (from Instruction)

semantic to physical

class Physical_IR_Root

This edge instead points to the expression that represents the left operand, i.e., the expression that computed the glvalue where the result of the instruction will be stored.

For example, in v = 42; (a LIR Integer_Literal_Instruction):

Its_Type (from Instruction)

semantic

class Type

Result type of the instruction, needed especially to distinguish assignments of complete structs from assignments of their first fields. Also needed to determine multiplication factor for pointer additions. For Cast_Instructions, this is the type casted to

Physical_For_Assignment (from Instruction)

semantic to physical

class Physical_IR_Root

Returns a PIR node for the assignment of the value that was computed by this instruction.

For example, in v = 42; (a LIR Integer_Literal_Instruction):

Parent (from Logical_IR_Root)

semantic

class Logical_IR_Root

Physical (from Logical_IR_Root)

semantic to physical

class Physical_IR_Root