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
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
|
#!/usr/bin/env python2.7
"""A test case update script.
This script is a utility to update LLVM X86 'llc' based test cases with new
FileCheck patterns. It can either update all of the tests in the file or
a single test function.
"""
import argparse
import itertools
import os # Used to advertise this file's name ("autogenerated_note").
import string
import subprocess
import sys
import tempfile
import re
# Invoke the tool that is being tested.
def llc(args, cmd_args, ir):
with open(ir) as ir_file:
stdout = subprocess.check_output(args.llc_binary + ' ' + cmd_args,
shell=True, stdin=ir_file)
# Fix line endings to unix CR style.
stdout = stdout.replace('\r\n', '\n')
return stdout
# RegEx: this is where the magic happens.
SCRUB_WHITESPACE_RE = re.compile(r'(?!^(| \w))[ \t]+', flags=re.M)
SCRUB_TRAILING_WHITESPACE_RE = re.compile(r'[ \t]+$', flags=re.M)
SCRUB_X86_SHUFFLES_RE = (
re.compile(
r'^(\s*\w+) [^#\n]+#+ ((?:[xyz]mm\d+|mem) = .*)$',
flags=re.M))
SCRUB_X86_SP_RE = re.compile(r'\d+\(%(esp|rsp)\)')
SCRUB_X86_RIP_RE = re.compile(r'[.\w]+\(%rip\)')
SCRUB_X86_LCP_RE = re.compile(r'\.LCPI[0-9]+_[0-9]+')
SCRUB_KILL_COMMENT_RE = re.compile(r'^ *#+ +kill:.*\n')
RUN_LINE_RE = re.compile('^\s*;\s*RUN:\s*(.*)$')
IR_FUNCTION_RE = re.compile('^\s*define\s+(?:internal\s+)?[^@]*@(\w+)\s*\(')
ASM_FUNCTION_RE = re.compile(
r'^_?(?P<func>[^:]+):[ \t]*#+[ \t]*@(?P=func)\n[^:]*?'
r'(?P<body>^##?[ \t]+[^:]+:.*?)\s*'
r'^\s*(?:[^:\n]+?:\s*\n\s*\.size|\.cfi_endproc|\.globl|\.comm|\.(?:sub)?section)',
flags=(re.M | re.S))
CHECK_PREFIX_RE = re.compile('--check-prefix=(\S+)')
CHECK_RE = re.compile(r'^\s*;\s*([^:]+?)(?:-NEXT|-NOT|-DAG|-LABEL)?:')
def scrub_asm(asm):
# Scrub runs of whitespace out of the assembly, but leave the leading
# whitespace in place.
asm = SCRUB_WHITESPACE_RE.sub(r' ', asm)
# Expand the tabs used for indentation.
asm = string.expandtabs(asm, 2)
# Detect shuffle asm comments and hide the operands in favor of the comments.
asm = SCRUB_X86_SHUFFLES_RE.sub(r'\1 {{.*#+}} \2', asm)
# Generically match the stack offset of a memory operand.
asm = SCRUB_X86_SP_RE.sub(r'{{[0-9]+}}(%\1)', asm)
# Generically match a RIP-relative memory operand.
asm = SCRUB_X86_RIP_RE.sub(r'{{.*}}(%rip)', asm)
# Generically match a LCP symbol.
asm = SCRUB_X86_LCP_RE.sub(r'{{\.LCPI.*}}', asm)
# Strip kill operands inserted into the asm.
asm = SCRUB_KILL_COMMENT_RE.sub('', asm)
# Strip trailing whitespace.
asm = SCRUB_TRAILING_WHITESPACE_RE.sub(r'', asm)
return asm
# Build up a dictionary of all the function bodies.
def build_function_body_dictionary(raw_tool_output, prefixes, func_dict, verbose):
for m in ASM_FUNCTION_RE.finditer(raw_tool_output):
if not m:
continue
func = m.group('func')
scrubbed_body = scrub_asm(m.group('body'))
if func.startswith('stress'):
# We only use the last line of the function body for stress tests.
scrubbed_body = '\n'.join(scrubbed_body.splitlines()[-1:])
if verbose:
print >>sys.stderr, 'Processing function: ' + func
for l in scrubbed_body.splitlines():
print >>sys.stderr, ' ' + l
for prefix in prefixes:
if func in func_dict[prefix] and func_dict[prefix][func] != scrubbed_body:
if prefix == prefixes[-1]:
print >>sys.stderr, ('WARNING: Found conflicting asm under the '
'same prefix: %r!' % (prefix,))
else:
func_dict[prefix][func] = None
continue
func_dict[prefix][func] = scrubbed_body
def add_checks(output_lines, prefix_list, func_dict, func_name):
printed_prefixes = []
for checkprefixes, _ in prefix_list:
for checkprefix in checkprefixes:
if checkprefix in printed_prefixes:
break
if not func_dict[checkprefix][func_name]:
continue
# Add some space between different check prefixes.
if len(printed_prefixes) != 0:
output_lines.append(';')
printed_prefixes.append(checkprefix)
output_lines.append('; %s-LABEL: %s:' % (checkprefix, func_name))
func_body = func_dict[checkprefix][func_name].splitlines()
output_lines.append('; %s: %s' % (checkprefix, func_body[0]))
for func_line in func_body[1:]:
output_lines.append('; %s-NEXT: %s' % (checkprefix, func_line))
# Add space between different check prefixes and the first line of code.
# output_lines.append(';')
break
return output_lines
def should_add_line_to_output(input_line, prefix_set):
# Skip any blank comment lines in the IR.
if input_line.strip() == ';':
return False
# Skip any blank lines in the IR.
#if input_line.strip() == '':
# return False
# And skip any CHECK lines. We're building our own.
m = CHECK_RE.match(input_line)
if m and m.group(1) in prefix_set:
return False
return True
def main():
parser = argparse.ArgumentParser(description=__doc__)
parser.add_argument('-v', '--verbose', action='store_true',
help='Show verbose output')
parser.add_argument('--llc-binary', default='llc',
help='The "llc" binary to use to generate the test case')
parser.add_argument(
'--function', help='The function in the test file to update')
parser.add_argument('tests', nargs='+')
args = parser.parse_args()
autogenerated_note = ('; NOTE: Assertions have been autogenerated by '
'utils/' + os.path.basename(__file__))
for test in args.tests:
if args.verbose:
print >>sys.stderr, 'Scanning for RUN lines in test file: %s' % (test,)
with open(test) as f:
input_lines = [l.rstrip() for l in f]
run_lines = [m.group(1)
for m in [RUN_LINE_RE.match(l) for l in input_lines] if m]
if args.verbose:
print >>sys.stderr, 'Found %d RUN lines:' % (len(run_lines),)
for l in run_lines:
print >>sys.stderr, ' RUN: ' + l
prefix_list = []
for l in run_lines:
(llc_cmd, filecheck_cmd) = tuple([cmd.strip() for cmd in l.split('|', 1)])
if not llc_cmd.startswith('llc '):
print >>sys.stderr, 'WARNING: Skipping non-llc RUN line: ' + l
continue
if not filecheck_cmd.startswith('FileCheck '):
print >>sys.stderr, 'WARNING: Skipping non-FileChecked RUN line: ' + l
continue
llc_cmd_args = llc_cmd[len('llc'):].strip()
llc_cmd_args = llc_cmd_args.replace('< %s', '').replace('%s', '').strip()
check_prefixes = [m.group(1)
for m in CHECK_PREFIX_RE.finditer(filecheck_cmd)]
if not check_prefixes:
check_prefixes = ['CHECK']
# FIXME: We should use multiple check prefixes to common check lines. For
# now, we just ignore all but the last.
prefix_list.append((check_prefixes, llc_cmd_args))
func_dict = {}
for prefixes, _ in prefix_list:
for prefix in prefixes:
func_dict.update({prefix: dict()})
for prefixes, llc_args in prefix_list:
if args.verbose:
print >>sys.stderr, 'Extracted LLC cmd: llc ' + llc_args
print >>sys.stderr, 'Extracted FileCheck prefixes: ' + str(prefixes)
raw_tool_output = llc(args, llc_args, test)
build_function_body_dictionary(raw_tool_output, prefixes, func_dict, args.verbose)
is_in_function = False
is_in_function_start = False
prefix_set = set([prefix for prefixes, _ in prefix_list for prefix in prefixes])
if args.verbose:
print >>sys.stderr, 'Rewriting FileCheck prefixes: %s' % (prefix_set,)
output_lines = []
output_lines.append(autogenerated_note)
for input_line in input_lines:
if is_in_function_start:
if input_line == '':
continue
if input_line.lstrip().startswith(';'):
m = CHECK_RE.match(input_line)
if not m or m.group(1) not in prefix_set:
output_lines.append(input_line)
continue
# Print out the various check lines here.
output_lines = add_checks(output_lines, prefix_list, func_dict, name)
is_in_function_start = False
if is_in_function:
if should_add_line_to_output(input_line, prefix_set) == True:
# This input line of the function body will go as-is into the output.
output_lines.append(input_line)
else:
continue
if input_line.strip() == '}':
is_in_function = False
continue
if input_line == autogenerated_note:
continue
# If it's outside a function, it just gets copied to the output.
output_lines.append(input_line)
m = IR_FUNCTION_RE.match(input_line)
if not m:
continue
name = m.group(1)
if args.function is not None and name != args.function:
# When filtering on a specific function, skip all others.
continue
is_in_function = is_in_function_start = True
if args.verbose:
print>>sys.stderr, 'Writing %d lines to %s...' % (len(output_lines), test)
with open(test, 'wb') as f:
f.writelines([l + '\n' for l in output_lines])
if __name__ == '__main__':
main()
|
