def visit_UnaryOperator(self, node: UnaryOperator) -> Constant:
"""Performs Unary Operations according to the arithmetic operator (PLUS and MINUS)
transforming them into a LLVM IR Constant.
Args:
node (UnaryOperator): node containing the variables (or numbers) and the
arithmetic operators (PLUS and MINUS)
Returns:
Constant: a LLVM IR Constant representing the number or variable.
"""
operator = node.operator.type
if operator == TokenType.PLUS:
expression = self.visit(node.expression)
return Constant(DoubleType(), float(+expression.constant))
elif operator == TokenType.MINUS:
expression = self.visit(node.expression)
return Constant(DoubleType(), float(-expression.constant))
def visit_Num(self, node: Num) -> Constant:
"""Set the Double Type to a specific number.
Args:
node (Num): a token represeting a number (constant)
Returns:
Constant: a LLVM IR Constant representing the number.
"""
return Constant(DoubleType(), float(node.value))
def visit_Var(self, node: Var) -> VarSymbol:
"""Search for the variable in the Symbol Table and define the Double Type.
Args:
node (Var): variable token
Returns:
VarSymbol: a variable symbol with updated type
"""
var_name = node.value
var_symbol = self.symbol_table.get_token(var_name)
var_symbol.type = DoubleType()
return var_symbol
def _create_instruct(self, typ: str, is_printf: bool = False) -> None:
"""Create a new Function instruction and attach it to a new Basic Block Entry.
Args:
typ (str): node type.
is_printf (bool, optional): Defaults to False.
"""
if is_printf or typ in ["String", "ArrayType"]:
self.str_counter += 1
self.func_name = f"_{typ}.{self.str_counter}"
func_type = FunctionType(VoidType(), [])
elif typ == "Boolean":
self.bool_counter += 1
self.func_name = f"_{typ}.{self.bool_counter}"
func_type = FunctionType(IntType(1), [])
else:
self.expr_counter += 1
self.func_name = f"_{typ}_Expr.{self.expr_counter}"
func_type = FunctionType(DoubleType(), [])
main_func = Function(self.module, func_type, self.func_name)
bb_entry = main_func.append_basic_block("entry")
self.builder = IRBuilder(bb_entry)
Module, Function, FunctionType, IntType,
Constant, IRBuilder
)
mod = Module('hello')
hello_func = Function(mod,
FunctionType(IntType(32), []),
name='hello')
block = hello_func.append_basic_block('entry')
builder = IRBuilder(block)
builder.ret(Constant(IntType(32), 37))
# A user-defined function
from llvmlite.ir import DoubleType
ty_double = DoubleType()
dsquared_func = Function(mod,
FunctionType(ty_double, [ty_double, ty_double]),
name='dsquared')
block = dsquared_func.append_basic_block('entry')
builder = IRBuilder(block)
# Get the function args
x, y = dsquared_func.args
# Compute temporary values for x*x and y*y
xsquared = builder.fmul(x, x)
ysquared = builder.fmul(y, y)
# Sum the values and return the result
d2 = builder.fadd(xsquared, ysquared)
def check_repr(val, expected):
c = Constant(DoubleType(), val)
self.assertEqual(str(c), expected)
from llvmlite.ir import Constant, FloatType, DoubleType
import math
print(Constant(FloatType(), math.pi))
print(Constant(DoubleType(), math.pi))
print(Constant(FloatType(), float('+inf')))
print(Constant(DoubleType(), float('+inf')))
print(Constant(FloatType(), float('-inf')))
print(Constant(DoubleType(), float('-inf')))
from collections import ChainMap
from functools import partialmethod
# LLVM imports. Don't change this.
from llvmlite.ir import (Module, IRBuilder, Function, IntType, DoubleType,
VoidType, Constant, GlobalVariable, FunctionType)
# Declare the LLVM type objects that you want to use for the low-level
# in our intermediate code. Basically, you're going to need to
# declare the integer, float, and char types here. These correspond
# to the types being used the intermediate code being created by
# the ircode.py file.
int_type = IntType(32) # 32-bit integer
float_type = DoubleType() # 64-bit float
byte_type = IntType(8) # 8-bit integer
void_type = VoidType() # Void type. This is a special type
# used for internal functions returning
# no value
LLVM_TYPE_MAPPING = {
'I': int_type,
'F': float_type,
'B': byte_type,
None: void_type
}
# The following class is going to generate the LLVM instruction stream.
# The basic features of this class are going to mirror the experiments
