p4-codegen.c File Reference

Compiler phase 4: code generation. More...

#include "p4-codegen.h"

Classes
struct	CodeGenData
	State/data for the code generator visitor. More...

Macros
#define	DATA   ((CodeGenData*)visitor->data)
	Macro for more convenient access to the error list inside a visitor data structure.

Typedefs
typedef struct CodeGenData	CodeGenData
	State/data for the code generator visitor.

Functions
CodeGenData *	CodeGenData_new (void)
	Allocate memory for code gen data.
void	CodeGenData_free (CodeGenData *data)
	Deallocate memory for code gen data.
Operand	var_base (ASTNode *node, Symbol *variable)
	Fills a register with the base address of a variable.
Operand	var_offset (ASTNode *node, Symbol *variable)
	Calculates the offset of a scalar variable reference and fills a register with that offset.
InsnList *	generate_code (ASTNode *tree)
	Convert an AST into linear ILOC code.

Detailed Description

Compiler phase 4: code generation.

Function Documentation

CodeGenData_free()

void CodeGenData_free

(

CodeGenData *

data

)

Deallocate memory for code gen data.

Parameters

data	Pointer to the structure to be deallocated

CodeGenData_new()

CodeGenData * CodeGenData_new

(

void

)

Allocate memory for code gen data.

Returns

Pointer to allocated structure

generate_code()

InsnList * generate_code

(

ASTNode *

tree

)

Convert an AST into linear ILOC code.

Parameters

tree	Root of AST

Returns

List of ILOC instructions

var_base()

Operand var_base	(	ASTNode *	node,
		Symbol *	variable
	)

Fills a register with the base address of a variable.

Parameters

node	AST node to emit code into (if needed)
variable	Desired variable

Returns

Virtual register that contains the base address

var_offset()

Operand var_offset	(	ASTNode *	node,
		Symbol *	variable
	)

Calculates the offset of a scalar variable reference and fills a register with that offset.

Parameters

node	AST node to emit code into (if needed)
variable	Desired variable

Returns

Virtual register that contains the base address