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authorStephen Hines <srhines@google.com>2015-04-01 18:49:24 +0000
committerGerrit Code Review <noreply-gerritcodereview@google.com>2015-04-01 18:49:26 +0000
commit3fa16bd6062e23bcdb82ed4dd965674792e6b761 (patch)
tree9348fc507292f7e8715d22d64ce5a32131b4f875 /utils/update_llc_test_checks.py
parentbeed47390a60f6f0c77532b3d3f76bb47ef49423 (diff)
parentebe69fe11e48d322045d5949c83283927a0d790b (diff)
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Merge "Update aosp/master LLVM for rebase to r230699."
Diffstat (limited to 'utils/update_llc_test_checks.py')
-rwxr-xr-xutils/update_llc_test_checks.py213
1 files changed, 213 insertions, 0 deletions
diff --git a/utils/update_llc_test_checks.py b/utils/update_llc_test_checks.py
new file mode 100755
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--- /dev/null
+++ b/utils/update_llc_test_checks.py
@@ -0,0 +1,213 @@
+#!/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 string
+import subprocess
+import sys
+import tempfile
+import re
+
+
+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)
+ return stdout
+
+
+ASM_SCRUB_WHITESPACE_RE = re.compile(r'(?!^(| \w))[ \t]+', flags=re.M)
+ASM_SCRUB_TRAILING_WHITESPACE_RE = re.compile(r'[ \t]+$', flags=re.M)
+ASM_SCRUB_SHUFFLES_RE = (
+ re.compile(
+ r'^(\s*\w+) [^#\n]+#+ ((?:[xyz]mm\d+|mem) = .*)$',
+ flags=re.M))
+ASM_SCRUB_SP_RE = re.compile(r'\d+\(%(esp|rsp)\)')
+ASM_SCRUB_RIP_RE = re.compile(r'[.\w]+\(%rip\)')
+ASM_SCRUB_KILL_COMMENT_RE = re.compile(r'^ *#+ +kill:.*\n')
+
+
+def scrub_asm(asm):
+ # Scrub runs of whitespace out of the assembly, but leave the leading
+ # whitespace in place.
+ asm = 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 = ASM_SCRUB_SHUFFLES_RE.sub(r'\1 {{.*#+}} \2', asm)
+ # Generically match the stack offset of a memory operand.
+ asm = ASM_SCRUB_SP_RE.sub(r'{{[0-9]+}}(%\1)', asm)
+ # Generically match a RIP-relative memory operand.
+ asm = ASM_SCRUB_RIP_RE.sub(r'{{.*}}(%rip)', asm)
+ # Strip kill operands inserted into the asm.
+ asm = ASM_SCRUB_KILL_COMMENT_RE.sub('', asm)
+ # Strip trailing whitespace.
+ asm = ASM_SCRUB_TRAILING_WHITESPACE_RE.sub(r'', asm)
+ return asm
+
+
+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()
+
+ 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<f>[^:]+):[ \t]*#+[ \t]*@(?P=f)\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)?:')
+
+ 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:
+ test_lines = [l.rstrip() for l in f]
+
+ run_lines = [m.group(1)
+ for m in [run_line_re.match(l) for l in test_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
+
+ checks = []
+ 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.
+ checks.append((check_prefixes, llc_cmd_args))
+
+ asm = {}
+ for prefixes, _ in checks:
+ for prefix in prefixes:
+ asm.update({prefix: dict()})
+ for prefixes, llc_args in checks:
+ if args.verbose:
+ print >>sys.stderr, 'Extracted LLC cmd: llc ' + llc_args
+ print >>sys.stderr, 'Extracted FileCheck prefixes: ' + str(prefixes)
+ raw_asm = llc(args, llc_args, test)
+ # Build up a dictionary of all the function bodies.
+ for m in asm_function_re.finditer(raw_asm):
+ if not m:
+ continue
+ f = m.group('f')
+ f_asm = scrub_asm(m.group('body'))
+ if f.startswith('stress'):
+ # We only use the last line of the asm for stress tests.
+ f_asm = '\n'.join(f_asm.splitlines()[-1:])
+ if args.verbose:
+ print >>sys.stderr, 'Processing asm for function: ' + f
+ for l in f_asm.splitlines():
+ print >>sys.stderr, ' ' + l
+ for prefix in prefixes:
+ if f in asm[prefix] and asm[prefix][f] != f_asm:
+ if prefix == prefixes[-1]:
+ print >>sys.stderr, ('WARNING: Found conflicting asm under the '
+ 'same prefix!')
+ else:
+ asm[prefix][f] = None
+ continue
+
+ asm[prefix][f] = f_asm
+
+ is_in_function = False
+ is_in_function_start = False
+ prefix_set = set([prefix for prefixes, _ in checks for prefix in prefixes])
+ if args.verbose:
+ print >>sys.stderr, 'Rewriting FileCheck prefixes: %s' % (prefix_set,)
+ fixed_lines = []
+ for l in test_lines:
+ if is_in_function_start:
+ if l.lstrip().startswith(';'):
+ m = check_re.match(l)
+ if not m or m.group(1) not in prefix_set:
+ fixed_lines.append(l)
+ continue
+
+ # Print out the various check lines here
+ printed_prefixes = []
+ for prefixes, _ in checks:
+ for prefix in prefixes:
+ if prefix in printed_prefixes:
+ break
+ if not asm[prefix][name]:
+ continue
+ if len(printed_prefixes) != 0:
+ fixed_lines.append(';')
+ printed_prefixes.append(prefix)
+ fixed_lines.append('; %s-LABEL: %s:' % (prefix, name))
+ asm_lines = asm[prefix][name].splitlines()
+ fixed_lines.append('; %s: %s' % (prefix, asm_lines[0]))
+ for asm_line in asm_lines[1:]:
+ fixed_lines.append('; %s-NEXT: %s' % (prefix, asm_line))
+ break
+ is_in_function_start = False
+
+ if is_in_function:
+ # Skip any blank comment lines in the IR.
+ if l.strip() == ';':
+ continue
+ # And skip any CHECK lines. We'll build our own.
+ m = check_re.match(l)
+ if m and m.group(1) in prefix_set:
+ continue
+ # Collect the remaining lines in the function body and look for the end
+ # of the function.
+ fixed_lines.append(l)
+ if l.strip() == '}':
+ is_in_function = False
+ continue
+
+ fixed_lines.append(l)
+
+ m = ir_function_re.match(l)
+ 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 fixed lines to %s...' % (
+ len(fixed_lines), test)
+ with open(test, 'w') as f:
+ f.writelines([l + '\n' for l in fixed_lines])
+
+
+if __name__ == '__main__':
+ main()
generated by cgit v1.1 at 2024-12-22 16:49:29 +0000