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118 | @VisitorCore.visit.dispatch # type: ignore[attr-defined,untyped-decorator]
def visit(self, node: astx.UnaryOp) -> None:
"""
title: Visit UnaryOp nodes.
parameters:
node:
type: astx.UnaryOp
"""
if node.op_code == "++":
self.visit_child(node.operand)
operand_val = safe_pop(self.result_stack)
if operand_val is None:
raise Exception("codegen: Invalid unary operand.")
operand_key = (
semantic_symbol_key(node.operand, node.operand.name)
if isinstance(node.operand, astx.Identifier)
else ""
)
one = ir.Constant(operand_val.type, 1)
if is_fp_type(operand_val.type):
result = self._llvm.ir_builder.fadd(operand_val, one, "inctmp")
else:
result = self._llvm.ir_builder.add(operand_val, one, "inctmp")
if isinstance(node.operand, astx.Identifier):
if operand_key in self.const_vars:
raise Exception(
f"Cannot mutate '{node.operand.name}':"
"declared as constant"
)
var_addr = self.named_values.get(operand_key)
if var_addr:
self._llvm.ir_builder.store(result, var_addr)
self.result_stack.append(result)
return
if node.op_code == "--":
self.visit_child(node.operand)
operand_val = safe_pop(self.result_stack)
if operand_val is None:
raise Exception("codegen: Invalid unary operand.")
operand_key = (
semantic_symbol_key(node.operand, node.operand.name)
if isinstance(node.operand, astx.Identifier)
else ""
)
one = ir.Constant(operand_val.type, 1)
if is_fp_type(operand_val.type):
result = self._llvm.ir_builder.fsub(operand_val, one, "dectmp")
else:
result = self._llvm.ir_builder.sub(operand_val, one, "dectmp")
if isinstance(node.operand, astx.Identifier):
if operand_key in self.const_vars:
raise Exception(
f"Cannot mutate '{node.operand.name}':"
"declared as constant"
)
var_addr = self.named_values.get(operand_key)
if var_addr:
self._llvm.ir_builder.store(result, var_addr)
self.result_stack.append(result)
return
if node.op_code == "!":
self.visit_child(node.operand)
val = safe_pop(self.result_stack)
if val is None:
raise Exception("codegen: Invalid unary operand.")
zero = ir.Constant(val.type, 0)
is_zero = self._llvm.ir_builder.icmp_signed(
"==", val, zero, "iszero"
)
if isinstance(val.type, ir.IntType) and val.type.width == 1:
result = is_zero
else:
result = self._llvm.ir_builder.zext(
is_zero, val.type, "nottmp"
)
if isinstance(node.operand, astx.Identifier):
operand_key = semantic_symbol_key(
node.operand, node.operand.name
)
if operand_key in self.const_vars:
raise Exception(
f"Cannot mutate '{node.operand.name}':"
"declared as constant"
)
addr = self.named_values.get(operand_key)
if addr:
self._llvm.ir_builder.store(result, addr)
self.result_stack.append(result)
return
raise Exception(f"Unary operator {node.op_code} not implemented yet.")
|