1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
|
import py
from rpython.flowspace.model import Constant
from rpython.rtyper.lltypesystem import lltype
from rpython.jit.codewriter.flatten import SSARepr, Label, TLabel, Register
from rpython.jit.codewriter.flatten import ListOfKind, IndirectCallTargets
from rpython.jit.codewriter.jitcode import SwitchDictDescr
from rpython.jit.metainterp.history import AbstractDescr
def format_assembler(ssarepr):
"""For testing: format a SSARepr as a multiline string."""
from cStringIO import StringIO
def repr(x):
if isinstance(x, Register):
return '%%%s%d' % (x.kind[0], x.index) # e.g. %i1 or %r2 or %f3
elif isinstance(x, Constant):
if (isinstance(x.concretetype, lltype.Ptr) and
isinstance(x.concretetype.TO, lltype.Struct)):
return '$<* struct %s>' % (x.concretetype.TO._name,)
return '$%r' % (x.value,)
elif isinstance(x, TLabel):
return getlabelname(x)
elif isinstance(x, ListOfKind):
return '%s[%s]' % (x.kind[0].upper(), ', '.join(map(repr, x)))
elif isinstance(x, SwitchDictDescr):
return '<SwitchDictDescr %s>' % (
', '.join(['%s:%s' % (key, getlabelname(lbl))
for key, lbl in x._labels]))
elif isinstance(x, (AbstractDescr, IndirectCallTargets)):
return '%r' % (x,)
else:
return '<unknown object: %r>' % (x,)
seenlabels = {}
for asm in ssarepr.insns:
for x in asm:
if isinstance(x, TLabel):
seenlabels[x.name] = -1
elif isinstance(x, SwitchDictDescr):
for _, switch in x._labels:
seenlabels[switch.name] = -1
labelcount = [0]
def getlabelname(lbl):
if seenlabels[lbl.name] == -1:
labelcount[0] += 1
seenlabels[lbl.name] = labelcount[0]
return 'L%d' % seenlabels[lbl.name]
output = StringIO()
insns = ssarepr.insns
if insns and insns[-1] == ('---',):
insns = insns[:-1]
for i, asm in enumerate(insns):
if ssarepr._insns_pos:
prefix = '%4d ' % ssarepr._insns_pos[i]
else:
prefix = ''
if isinstance(asm[0], Label):
if asm[0].name in seenlabels:
print >> output, prefix + '%s:' % getlabelname(asm[0])
else:
print >> output, prefix + asm[0],
if len(asm) > 1:
if asm[-2] == '->':
if len(asm) == 3:
print >> output, '->', repr(asm[-1])
else:
lst = map(repr, asm[1:-2])
print >> output, ', '.join(lst), '->', repr(asm[-1])
else:
lst = map(repr, asm[1:])
if asm[0] == '-live-': lst.sort()
print >> output, ', '.join(lst)
else:
print >> output
res = output.getvalue()
return res
def assert_format(ssarepr, expected):
asm = format_assembler(ssarepr)
if expected != '':
expected = str(py.code.Source(expected)).strip() + '\n'
asmlines = asm.split("\n")
explines = expected.split("\n")
for asm, exp in zip(asmlines, explines):
if asm != exp:
msg = [""]
msg.append("Got: " + asm)
msg.append("Expected: " + exp)
lgt = 0
for i in range(min(len(asm), len(exp))):
if exp[i] == asm[i]:
lgt += 1
else:
break
msg.append(" " + " " * lgt + "^^^^")
raise AssertionError('\n'.join(msg))
assert len(asmlines) == len(explines)
def unformat_assembler(text, registers=None):
# XXX limited to simple assembler right now
#
def unformat_arg(s):
if s.endswith(','):
s = s[:-1].rstrip()
if s[0] == '%':
try:
return registers[s]
except KeyError:
num = int(s[2:])
if s[1] == 'i': reg = Register('int', num)
elif s[1] == 'r': reg = Register('ref', num)
elif s[1] == 'f': reg = Register('float', num)
else: raise AssertionError("bad register type")
registers[s] = reg
return reg
elif s[0] == '$':
intvalue = int(s[1:])
return Constant(intvalue, lltype.Signed)
elif s[0] == 'L':
return TLabel(s)
elif s[0] in 'IRF' and s[1] == '[' and s[-1] == ']':
items = split_words(s[2:-1])
items = map(unformat_arg, items)
return ListOfKind({'I': 'int', 'R': 'ref', 'F': 'float'}[s[0]],
items)
elif s.startswith('<SwitchDictDescr '):
assert s.endswith('>')
switchdict = SwitchDictDescr()
switchdict._labels = []
items = split_words(s[len('<SwitchDictDescr '):-1])
for item in items:
key, value = item.split(':')
value = value.rstrip(',')
switchdict._labels.append((int(key), TLabel(value)))
return switchdict
else:
raise AssertionError("unsupported argument: %r" % (s,))
#
if registers is None:
registers = {}
ssarepr = SSARepr('test')
for line in text.splitlines():
line = line.strip()
if not line:
continue
if line.startswith('L') and line.endswith(':'):
ssarepr.insns.append((Label(line[:-1]),))
else:
try:
opname, line = line.split(None, 1)
except ValueError:
opname, line = line, ''
words = list(split_words(line))
if '->' in words:
assert words.index('->') == len(words) - 2
extra = ['->', unformat_arg(words[-1])]
del words[-2:]
else:
extra = []
insn = [opname] + [unformat_arg(s) for s in words] + extra
ssarepr.insns.append(tuple(insn))
return ssarepr
def split_words(line):
word = ''
nested = 0
for i, c in enumerate(line):
if c == ' ' and nested == 0:
if word:
yield word
word = ''
else:
word += c
if c in '<([':
nested += 1
if c in '])>' and (' '+line)[i:i+4] != ' -> ':
nested -= 1
assert nested >= 0
if word:
yield word
assert nested == 0
|
