forked from M-Labs/artiq
Add support for Assert.
This commit is contained in:
whitequark
parent
5d518dcec6
commit
236d5b886a
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@ -106,14 +106,13 @@ class User(NamedValue):
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def __init__(self, operands, typ, name):
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super().__init__(typ, name)
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self.operands = []
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if operands is not None:
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self.set_operands(operands)
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def set_operands(self, new_operands):
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for operand in self.operands:
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for operand in set(self.operands):
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operand.uses.remove(self)
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self.operands = new_operands
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for operand in self.operands:
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for operand in set(self.operands):
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operand.uses.add(self)
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def drop_references(self):
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@ -162,6 +161,9 @@ class Instruction(User):
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def erase(self):
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self.remove_from_parent()
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self.drop_references()
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# Check this after drop_references in case this
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# is a self-referencing phi.
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assert not any(self.uses)
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def replace_with(self, value):
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self.replace_all_uses_with(value)
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@ -220,7 +222,21 @@ class Phi(Instruction):
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def add_incoming(self, value, block):
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assert value.type == self.type
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self.operands.append(value)
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value.uses.add(self)
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self.operands.append(block)
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block.uses.add(self)
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def remove_incoming_value(self, value):
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index = self.operands.index(value)
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self.operands[index].uses.remove(self)
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self.operands[index + 1].uses.remove(self)
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del self.operands[index:index + 2]
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def remove_incoming_block(self, block):
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index = self.operands.index(block)
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self.operands[index - 1].uses.remove(self)
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self.operands[index].uses.remove(self)
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del self.operands[index - 1:index + 1]
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def __str__(self):
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if builtins.is_none(self.type):
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@ -268,9 +284,13 @@ class BasicBlock(NamedValue):
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self.function.remove(self)
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def erase(self):
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for insn in self.instructions:
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# self.instructions is updated while iterating
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for insn in list(self.instructions):
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insn.erase()
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self.remove_from_parent()
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# Check this after erasing instructions in case the block
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# loops into itself.
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assert not any(self.uses)
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def prepend(self, insn):
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assert isinstance(insn, Instruction)
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@ -817,6 +837,7 @@ class Select(Instruction):
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"""
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def __init__(self, cond, if_true, if_false, name=""):
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assert isinstance(cond, Value)
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assert builtins.is_bool(cond.type)
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assert isinstance(if_true, Value)
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assert isinstance(if_false, Value)
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assert if_true.type == if_false.type
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@ -864,8 +885,10 @@ class BranchIf(Terminator):
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"""
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def __init__(self, cond, if_true, if_false, name=""):
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assert isinstance(cond, Value)
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assert builtins.is_bool(cond.type)
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assert isinstance(if_true, BasicBlock)
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assert isinstance(if_false, BasicBlock)
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assert if_true != if_false # use Branch instead
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super().__init__([cond, if_true, if_false], builtins.TNone(), name)
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def opcode(self):
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@ -39,16 +39,22 @@ class ARTIQIRGenerator(algorithm.Visitor):
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set of variables that will be resolved in global scope
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:ivar current_block: (:class:`ir.BasicBlock`)
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basic block to which any new instruction will be appended
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:ivar current_env: (:class:`ir.Environment`)
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:ivar current_env: (:class:`ir.Alloc` of type :class:`ir.TEnvironment`)
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the chained function environment, containing variables that
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can become upvalues
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:ivar current_private_env: (:class:`ir.Environment`)
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:ivar current_private_env: (:class:`ir.Alloc` of type :class:`ir.TEnvironment`)
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the private function environment, containing internal state
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:ivar current_assign: (:class:`ir.Value` or None)
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the right-hand side of current assignment statement, or
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a component of a composite right-hand side when visiting
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a composite left-hand side, such as, in ``x, y = z``,
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the 2nd tuple element when visting ``y``
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:ivar current_assert_env: (:class:`ir.Alloc` of type :class:`ir.TEnvironment`)
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the environment where the individual components of current assert
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statement are stored until display
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:ivar current_assert_subexprs: (list of (:class:`ast.AST`, string))
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the mapping from components of current assert statement to the names
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their values have in :ivar:`current_assert_env`
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:ivar break_target: (:class:`ir.BasicBlock` or None)
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the basic block to which ``break`` will transfer control
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:ivar continue_target: (:class:`ir.BasicBlock` or None)
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@ -72,6 +78,8 @@ class ARTIQIRGenerator(algorithm.Visitor):
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self.current_env = None
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self.current_private_env = None
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self.current_assign = None
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self.current_assert_env = None
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self.current_assert_subexprs = None
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self.break_target = None
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self.continue_target = None
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self.return_target = None
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@ -203,7 +211,7 @@ class ARTIQIRGenerator(algorithm.Visitor):
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self.append(ir.SetLocal(env, arg_name, args[index]))
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for index, (arg_name, env_default_name) in enumerate(zip(typ.optargs, defaults)):
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default = self.append(ir.GetLocal(self.current_env, env_default_name))
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value = self.append(ir.Builtin("unwrap", [optargs[index], default],
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value = self.append(ir.Builtin("unwrap_or", [optargs[index], default],
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typ.optargs[arg_name]))
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self.append(ir.SetLocal(env, arg_name, value))
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@ -736,7 +744,7 @@ class ARTIQIRGenerator(algorithm.Visitor):
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for index, elt_node in enumerate(node.elts):
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self.current_assign = \
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self.append(ir.GetAttr(old_assign, index,
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name="{}.{}".format(old_assign.name, index)),
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name="{}.e{}".format(old_assign.name, index)),
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loc=elt_node.loc)
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self.visit(elt_node)
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finally:
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@ -805,18 +813,26 @@ class ARTIQIRGenerator(algorithm.Visitor):
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def visit_BoolOpT(self, node):
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blocks = []
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for value_node in node.values:
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value_head = self.current_block
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value = self.visit(value_node)
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blocks.append((value, self.current_block))
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self.instrument_assert(value_node, value)
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value_tail = self.current_block
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blocks.append((value, value_head, value_tail))
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self.current_block = self.add_block()
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tail = self.current_block
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phi = self.append(ir.Phi(node.type))
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for ((value, block), next_block) in zip(blocks, [b for (v,b) in blocks[1:]] + [tail]):
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phi.add_incoming(value, block)
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for ((value, value_head, value_tail), (next_value_head, next_value_tail)) in \
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zip(blocks, [(h,t) for (v,h,t) in blocks[1:]] + [(tail, tail)]):
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phi.add_incoming(value, value_tail)
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if next_value_head != tail:
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if isinstance(node.op, ast.And):
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block.append(ir.BranchIf(value, next_block, tail))
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value_tail.append(ir.BranchIf(value, next_value_head, tail))
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else:
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block.append(ir.BranchIf(value, tail, next_block))
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value_tail.append(ir.BranchIf(value, tail, next_value_head))
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else:
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value_tail.append(ir.Branch(tail))
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return phi
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def visit_UnaryOpT(self, node):
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@ -1005,7 +1021,7 @@ class ARTIQIRGenerator(algorithm.Visitor):
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ir.Constant(False, builtins.TBool())))
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result = self.append(ir.Select(result, on_step,
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ir.Constant(False, builtins.TBool())))
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elif builtins.isiterable(haystack.type):
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elif builtins.is_iterable(haystack.type):
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length = self.iterable_len(haystack)
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cmp_result = loop_body2 = None
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@ -1068,8 +1084,10 @@ class ARTIQIRGenerator(algorithm.Visitor):
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# of comparisons.
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blocks = []
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lhs = self.visit(node.left)
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self.instrument_assert(node.left, lhs)
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for op, rhs_node in zip(node.ops, node.comparators):
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rhs = self.visit(rhs_node)
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self.instrument_assert(rhs_node, rhs)
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result = self.polymorphic_compare_pair(op, lhs, rhs)
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blocks.append((result, self.current_block))
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self.current_block = self.add_block()
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@ -1079,7 +1097,10 @@ class ARTIQIRGenerator(algorithm.Visitor):
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phi = self.append(ir.Phi(node.type))
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for ((value, block), next_block) in zip(blocks, [b for (v,b) in blocks[1:]] + [tail]):
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phi.add_incoming(value, block)
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if next_block != tail:
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block.append(ir.BranchIf(value, next_block, tail))
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else:
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block.append(ir.Branch(tail))
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return phi
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def visit_builtin_call(self, node):
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@ -1211,6 +1232,79 @@ class ARTIQIRGenerator(algorithm.Visitor):
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self.current_block = after_invoke
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return invoke
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def instrument_assert(self, node, value):
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if self.current_assert_env is not None:
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if isinstance(value, ir.Constant):
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return # don't display the values of constants
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if any([algorithm.compare(node, subexpr)
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for (subexpr, name) in self.current_assert_subexprs]):
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return # don't display the same subexpression twice
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name = self.current_assert_env.type.add("subexpr", ir.TOption(node.type))
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value_opt = self.append(ir.Alloc([value], ir.TOption(node.type)),
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loc=node.loc)
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self.append(ir.SetLocal(self.current_assert_env, name, value_opt),
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loc=node.loc)
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self.current_assert_subexprs.append((node, name))
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def visit_Assert(self, node):
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try:
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assert_env = self.current_assert_env = \
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self.append(ir.Alloc([], ir.TEnvironment({}), name="assertenv"))
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assert_subexprs = self.current_assert_subexprs = []
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init = self.current_block
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prehead = self.current_block = self.add_block()
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cond = self.visit(node.test)
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head = self.current_block
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finally:
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self.current_assert_env = None
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self.current_assert_subexprs = None
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for subexpr_node, subexpr_name in assert_subexprs:
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empty = init.append(ir.Alloc([], ir.TOption(subexpr_node.type)))
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init.append(ir.SetLocal(assert_env, subexpr_name, empty))
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init.append(ir.Branch(prehead))
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if_failed = self.current_block = self.add_block()
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if node.msg:
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explanation = node.msg.s
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else:
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explanation = node.loc.source()
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self.append(ir.Builtin("printf", [
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ir.Constant("assertion failed at %s: %s\n", builtins.TStr()),
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ir.Constant(str(node.loc.begin()), builtins.TStr()),
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ir.Constant(str(explanation), builtins.TStr()),
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], builtins.TNone()))
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for subexpr_node, subexpr_name in assert_subexprs:
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subexpr_head = self.current_block
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subexpr_value_opt = self.append(ir.GetLocal(assert_env, subexpr_name))
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subexpr_cond = self.append(ir.Builtin("is_some", [subexpr_value_opt],
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builtins.TBool()))
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subexpr_body = self.current_block = self.add_block()
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self.append(ir.Builtin("printf", [
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ir.Constant(" (%s) = ", builtins.TStr()),
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ir.Constant(subexpr_node.loc.source(), builtins.TStr())
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], builtins.TNone()))
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subexpr_value = self.append(ir.Builtin("unwrap", [subexpr_value_opt],
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subexpr_node.type))
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self.polymorphic_print([subexpr_value], separator="", suffix="\n")
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subexpr_postbody = self.current_block
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subexpr_tail = self.current_block = self.add_block()
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self.append(ir.Branch(subexpr_tail), block=subexpr_postbody)
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self.append(ir.BranchIf(subexpr_cond, subexpr_body, subexpr_tail), block=subexpr_head)
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self.append(ir.Builtin("abort", [], builtins.TNone()))
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self.append(ir.Unreachable())
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tail = self.current_block = self.add_block()
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self.append(ir.BranchIf(cond, tail, if_failed), block=head)
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def polymorphic_print(self, values, separator, suffix=""):
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format_string = ""
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args = []
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@ -421,7 +421,6 @@ class ASTTypedRewriter(algorithm.Transformer):
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visit_YieldFrom = visit_unsupported
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# stmt
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visit_Assert = visit_unsupported
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visit_ClassDef = visit_unsupported
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visit_Delete = visit_unsupported
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visit_Import = visit_unsupported
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@ -16,4 +16,25 @@ class DeadCodeEliminator:
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def process_function(self, func):
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for block in func.basic_blocks:
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if not any(block.predecessors()) and block != func.entry():
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self.remove_block(block)
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def remove_block(self, block):
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# block.uses are updated while iterating
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for use in set(block.uses):
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if isinstance(use, ir.Phi):
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use.remove_incoming_block(block)
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if not any(use.operands):
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self.remove_instruction(use)
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else:
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assert False
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block.erase()
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def remove_instruction(self, insn):
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for use in set(insn.uses):
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if isinstance(use, ir.Phi):
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use.remove_incoming_value(insn)
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if not any(use.operands):
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self.remove_instruction(use)
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insn.erase()
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@ -947,3 +947,14 @@ class Inferencer(algorithm.Visitor):
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else:
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self._unify(self.function.return_type, node.value.type,
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self.function.name_loc, node.value.loc, makenotes)
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def visit_Assert(self, node):
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self.generic_visit(node)
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self._unify(node.test.type, builtins.TBool(),
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node.test.loc, None)
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if node.msg is not None:
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if not isinstance(node.msg, asttyped.StrT):
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diag = diagnostic.Diagnostic("error",
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"assertion message must be a string literal", {},
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node.msg.loc)
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self.engine.process(diag)
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@ -95,7 +95,9 @@ class LLVMIRGenerator:
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if llfun is not None:
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return llfun
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if name in ("llvm.abort", "llvm.donothing"):
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if name in "llvm.donothing":
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llty = ll.FunctionType(ll.VoidType(), [])
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elif name in "llvm.trap":
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llty = ll.FunctionType(ll.VoidType(), [])
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elif name == "llvm.round.f64":
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llty = ll.FunctionType(ll.DoubleType(), [ll.DoubleType()])
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@ -181,6 +183,18 @@ class LLVMIRGenerator:
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if ir.is_environment(insn.type):
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return self.llbuilder.alloca(self.llty_of_type(insn.type, bare=True),
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name=insn.name)
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elif ir.is_option(insn.type):
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if len(insn.operands) == 0: # empty
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llvalue = ll.Constant(self.llty_of_type(insn.type), ll.Undefined)
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return self.llbuilder.insert_value(llvalue, ll.Constant(ll.IntType(1), False), 0,
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name=insn.name)
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elif len(insn.operands) == 1: # full
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llvalue = ll.Constant(self.llty_of_type(insn.type), ll.Undefined)
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llvalue = self.llbuilder.insert_value(llvalue, ll.Constant(ll.IntType(1), True), 0)
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return self.llbuilder.insert_value(llvalue, self.map(insn.operands[0]), 1,
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name=insn.name)
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else:
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assert False
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elif builtins.is_list(insn.type):
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llsize = self.map(insn.operands[0])
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llvalue = ll.Constant(self.llty_of_type(insn.type), ll.Undefined)
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@ -382,7 +396,17 @@ class LLVMIRGenerator:
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def process_Builtin(self, insn):
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if insn.op == "nop":
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return self.llbuilder.call(self.llbuiltin("llvm.donothing"), [])
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if insn.op == "abort":
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return self.llbuilder.call(self.llbuiltin("llvm.trap"), [])
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elif insn.op == "is_some":
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optarg = self.map(insn.operands[0])
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return self.llbuilder.extract_value(optarg, 0,
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name=insn.name)
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elif insn.op == "unwrap":
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optarg = self.map(insn.operands[0])
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return self.llbuilder.extract_value(optarg, 1,
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name=insn.name)
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elif insn.op == "unwrap_or":
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optarg, default = map(self.map, insn.operands)
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has_arg = self.llbuilder.extract_value(optarg, 0)
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arg = self.llbuilder.extract_value(optarg, 1)
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@ -455,7 +479,7 @@ class LLVMIRGenerator:
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def process_Raise(self, insn):
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# TODO: hack before EH is working
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llinsn = self.llbuilder.call(self.llbuiltin("llvm.abort"), [],
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llinsn = self.llbuilder.call(self.llbuiltin("llvm.trap"), [],
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name=insn.name)
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self.llbuilder.unreachable()
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return llinsn
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@ -0,0 +1,6 @@
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# RUN: %python -m artiq.compiler.testbench.inferencer +diag %s >%t
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# RUN: OutputCheck %s --file-to-check=%t
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x = "A"
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# CHECK-L: ${LINE:+1}: error: assertion message must be a string literal
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assert True, x
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