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Invalidate string cache for mutable instructions #954

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Invalidate string cache for mutable instructions #954

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c4c0141
Clear string cache after func callee replacement
siboehm May 29, 2023
4d49b68
Clear string cache after cbranch set weights
siboehm May 30, 2023
1c0aaaf
Clear string cache after indir branch add_direction
siboehm May 30, 2023
432f21d
Clear string cache after switch add_case
siboehm May 30, 2023
e44e3f3
Clear string cache upon Phi node modified
siboehm May 30, 2023
85a7ab3
clear string cache upon landing pad modification
siboehm May 30, 2023
9d7239f
Fix flake8
siboehm May 30, 2023
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7 changes: 7 additions & 0 deletions llvmlite/ir/instructions.py
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Original file line number Diff line number Diff line change
Expand Up @@ -124,6 +124,7 @@ def replace_callee(self, newfunc):
if newfunc.function_type != self.callee.function_type:
raise TypeError("New function has incompatible type")
self.callee = newfunc
self._clear_string_cache()

@property
def called_function(self):
Expand Down Expand Up @@ -214,6 +215,7 @@ def set_weights(self, weights):
operands.append(Constant(types.IntType(32), w))
md = self.module.add_metadata(operands)
self.set_metadata("prof", md)
self._clear_string_cache()


class Ret(Terminator):
Expand Down Expand Up @@ -260,6 +262,7 @@ def address(self):
def add_destination(self, block):
assert isinstance(block, Block)
self.destinations.append(block)
self._clear_string_cache()

def descr(self, buf):
destinations = ["label {0}".format(blk.get_reference())
Expand Down Expand Up @@ -288,6 +291,7 @@ def add_case(self, val, block):
if not isinstance(val, Value):
val = Constant(self.value.type, val)
self.cases.append((val, block))
self._clear_string_cache()

def descr(self, buf):
cases = ["{0} {1}, label {2}".format(val.type, val.get_reference(),
Expand Down Expand Up @@ -580,10 +584,12 @@ def descr(self, buf):
def add_incoming(self, value, block):
assert isinstance(block, Block)
self.incomings.append((value, block))
self._clear_string_cache()

def replace_usage(self, old, new):
self.incomings = [((new if val is old else val), blk)
for (val, blk) in self.incomings]
self._clear_string_cache()


class ExtractElement(Instruction):
Expand Down Expand Up @@ -829,6 +835,7 @@ def __init__(self, parent, typ, name='', cleanup=False):
def add_clause(self, clause):
assert isinstance(clause, _LandingPadClause)
self.clauses.append(clause)
self._clear_string_cache()

def descr(self, buf):
fmt = "landingpad {type}{cleanup}{clauses}\n"
Expand Down
48 changes: 44 additions & 4 deletions llvmlite/tests/test_ir.py
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Original file line number Diff line number Diff line change
Expand Up @@ -943,9 +943,10 @@ def test_misc_ops(self):
def test_phi(self):
block = self.block(name='my_block')
builder = ir.IRBuilder(block)
a, b = builder.function.args[:2]
a, b, c = builder.function.args[:3]
bb2 = builder.function.append_basic_block('b2')
bb3 = builder.function.append_basic_block('b3')
bb4 = builder.function.append_basic_block('b4')
phi = builder.phi(int32, 'my_phi', flags=('fast',))
phi.add_incoming(a, bb2)
phi.add_incoming(b, bb3)
Expand All @@ -954,6 +955,16 @@ def test_phi(self):
my_block:
%"my_phi" = phi fast i32 [%".1", %"b2"], [%".2", %"b3"]
""")
phi.add_incoming(a, bb4)
self.check_block(block, """\
my_block:
%"my_phi" = phi fast i32 [%".1", %"b2"], [%".2", %"b3"], [%".1", %"b4"]
""") # noqa E501
phi.replace_usage(a, c)
self.check_block(block, """\
my_block:
%"my_phi" = phi fast i32 [%".3", %"b2"], [%".2", %"b3"], [%".3", %"b4"]
""") # noqa E501

def test_mem_ops(self):
block = self.block(name='my_block')
Expand Down Expand Up @@ -1209,6 +1220,7 @@ def test_cbranch_weights(self):
bb_true = builder.function.append_basic_block(name='b_true')
bb_false = builder.function.append_basic_block(name='b_false')
br = builder.cbranch(ir.Constant(int1, False), bb_true, bb_false)
self.assertNotIn('branch_weights', str(br))
br.set_weights([5, 42])
self.assertTrue(block.is_terminated)
self.check_block(block, """\
Expand All @@ -1224,6 +1236,7 @@ def test_branch_indirect(self):
builder = ir.IRBuilder(block)
bb_1 = builder.function.append_basic_block(name='b_1')
bb_2 = builder.function.append_basic_block(name='b_2')
bb_3 = builder.function.append_basic_block(name='b_3')
indirectbr = builder.branch_indirect(
ir.BlockAddress(builder.function, bb_1))
indirectbr.add_destination(bb_1)
Expand All @@ -1233,6 +1246,11 @@ def test_branch_indirect(self):
my_block:
indirectbr i8* blockaddress(@"my_func", %"b_1"), [label %"b_1", label %"b_2"]
""") # noqa E501
indirectbr.add_destination(bb_3)
self.check_block(block, """\
my_block:
indirectbr i8* blockaddress(@"my_func", %"b_1"), [label %"b_1", label %"b_2", label %"b_3"]
""") # noqa E501

def test_returns(self):
def check(block, expected_ir):
Expand Down Expand Up @@ -1281,6 +1299,7 @@ def test_switch(self):
bb_onzero = builder.function.append_basic_block(name='onzero')
bb_onone = builder.function.append_basic_block(name='onone')
bb_ontwo = builder.function.append_basic_block(name='ontwo')
bb_onfour = builder.function.append_basic_block(name='onfour')
bb_else = builder.function.append_basic_block(name='otherwise')
sw = builder.switch(a, bb_else)
sw.add_case(ir.Constant(int32, 0), bb_onzero)
Expand All @@ -1292,6 +1311,11 @@ def test_switch(self):
my_block:
switch i32 %".1", label %"otherwise" [i32 0, label %"onzero" i32 1, label %"onone" i32 2, label %"ontwo"]
""") # noqa E501
sw.add_case(ir.Constant(int32, 4), bb_onfour)
self.check_block(block, """\
my_block:
switch i32 %".1", label %"otherwise" [i32 0, label %"onzero" i32 1, label %"onone" i32 2, label %"ontwo" i32 4, label %"onfour"]
""") # noqa E501

def test_call(self):
block = self.block(name='my_block')
Expand Down Expand Up @@ -1461,19 +1485,33 @@ def test_landingpad(self):
block = self.block(name='my_block')
builder = ir.IRBuilder(block)
lp = builder.landingpad(ir.LiteralStructType([int32,
int8.as_pointer()]), 'lp')
int8.as_pointer()]),
cleanup=True, name='lp')
int_typeinfo = ir.GlobalVariable(builder.function.module,
int8.as_pointer(), "_ZTIi")
int8.as_pointer(),
"_ZTIi")
int_typeinfo.global_constant = True
lp.add_clause(ir.CatchClause(int_typeinfo))
lp.add_clause(ir.FilterClause(ir.Constant(ir.ArrayType(
int_typeinfo.type, 1), [int_typeinfo])))
builder.resume(lp)
self.check_block(block, """\
my_block:
%"lp" = landingpad {i32, i8*}
%"lp" = landingpad {i32, i8*} cleanup
catch i8** @"_ZTIi"
filter [1 x i8**] [i8** @"_ZTIi"]
resume {i32, i8*} %"lp"
""")
d_typeinfo = ir.GlobalVariable(builder.function.module,
int8.as_pointer(), "_ZTId")
d_typeinfo.global_constant = True
lp.add_clause(ir.CatchClause(d_typeinfo))
self.check_block(block, """\
my_block:
%"lp" = landingpad {i32, i8*} cleanup
catch i8** @"_ZTIi"
filter [1 x i8**] [i8** @"_ZTIi"]
catch i8** @"_ZTId"
resume {i32, i8*} %"lp"
""")

Expand Down Expand Up @@ -2621,8 +2659,10 @@ def test_call_transform(self):
builder.position_at_end(foo.append_basic_block())
call = builder.call(foo, ())
self.assertEqual(call.callee, foo)
self.assertIn("call void @\"foo\"()", str(mod))
modified = ir.replace_all_calls(mod, foo, bar)
self.assertIn(call, modified)
self.assertNotIn("call void @\"foo\"()", str(mod))
self.assertNotEqual(call.callee, foo)
self.assertEqual(call.callee, bar)

Expand Down