2016-03-25 07:19:26 +08:00
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#!/usr/bin/env python2.7
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2016-04-06 02:00:47 +08:00
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"""A script to generate FileCheck statements for regression tests.
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2016-03-25 07:19:26 +08:00
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This script is a utility to update LLVM opt or llc test cases with new
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FileCheck patterns. It can either update all of the tests in the file or
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a single test function.
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2016-04-06 02:00:47 +08:00
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Example usage:
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$ update_test_checks.py --tool=../bin/opt test/foo.ll
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Workflow:
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1. Make a compiler patch that requires updating some number of FileCheck lines
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in regression test files.
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2. Save the patch and revert it from your local work area.
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3. Update the RUN-lines in the affected regression tests to look canonical.
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Example: "; RUN: opt < %s -instcombine -S | FileCheck %s"
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4. Refresh the FileCheck lines for either the entire file or select functions by
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running this script.
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5. Commit the fresh baseline of checks.
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6. Apply your patch from step 1 and rebuild your local binaries.
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7. Re-run this script on affected regression tests.
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8. Check the diffs to ensure the script has done something reasonable.
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9. Submit a patch including the regression test diffs for review.
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A common pattern is to have the script insert complete checking of every
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instruction. Then, edit it down to only check the relevant instructions.
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The script is designed to make adding checks to a test case fast, it is *not*
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designed to be authoratitive about what constitutes a good test!
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2016-03-25 07:19:26 +08:00
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"""
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import argparse
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import itertools
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import os # Used to advertise this file's name ("autogenerated_note").
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import string
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import subprocess
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import sys
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import tempfile
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import re
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2016-04-06 03:50:21 +08:00
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ADVERT = '; NOTE: Assertions have been autogenerated by '
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2016-03-25 07:19:26 +08:00
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# RegEx: this is where the magic happens.
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2016-03-28 04:43:02 +08:00
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SCRUB_LEADING_WHITESPACE_RE = re.compile(r'^(\s+)')
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2016-03-25 07:19:26 +08:00
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SCRUB_WHITESPACE_RE = re.compile(r'(?!^(| \w))[ \t]+', flags=re.M)
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SCRUB_TRAILING_WHITESPACE_RE = re.compile(r'[ \t]+$', flags=re.M)
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SCRUB_X86_SHUFFLES_RE = (
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re.compile(
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2016-07-03 21:08:29 +08:00
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r'^(\s*\w+) [^#\n]+#+ ((?:[xyz]mm\d+|mem)( \{%k\d+\}( \{z\})?)? = .*)$',
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2016-03-25 07:19:26 +08:00
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flags=re.M))
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SCRUB_X86_SP_RE = re.compile(r'\d+\(%(esp|rsp)\)')
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SCRUB_X86_RIP_RE = re.compile(r'[.\w]+\(%rip\)')
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2016-06-12 04:39:21 +08:00
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SCRUB_X86_LCP_RE = re.compile(r'\.LCPI[0-9]+_[0-9]+')
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2016-03-25 07:19:26 +08:00
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SCRUB_KILL_COMMENT_RE = re.compile(r'^ *#+ +kill:.*\n')
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SCRUB_IR_COMMENT_RE = re.compile(r'\s*;.*')
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RUN_LINE_RE = re.compile('^\s*;\s*RUN:\s*(.*)$')
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2016-03-26 01:00:12 +08:00
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IR_FUNCTION_RE = re.compile('^\s*define\s+(?:internal\s+)?[^@]*@([\w-]+)\s*\(')
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2016-03-25 07:19:26 +08:00
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LLC_FUNCTION_RE = re.compile(
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r'^_?(?P<func>[^:]+):[ \t]*#+[ \t]*@(?P=func)\n[^:]*?'
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r'(?P<body>^##?[ \t]+[^:]+:.*?)\s*'
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r'^\s*(?:[^:\n]+?:\s*\n\s*\.size|\.cfi_endproc|\.globl|\.comm|\.(?:sub)?section)',
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flags=(re.M | re.S))
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OPT_FUNCTION_RE = re.compile(
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r'^\s*define\s+(?:internal\s+)?[^@]*@(?P<func>[\w-]+?)\s*\('
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r'(\s+)?[^{]*\{\n(?P<body>.*?)\}',
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flags=(re.M | re.S))
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CHECK_PREFIX_RE = re.compile('--check-prefix=(\S+)')
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CHECK_RE = re.compile(r'^\s*;\s*([^:]+?)(?:-NEXT|-NOT|-DAG|-LABEL)?:')
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IR_VALUE_DEF_RE = re.compile(r'\s+%(.*) =')
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# Invoke the tool that is being tested.
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def invoke_tool(args, cmd_args, ir):
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with open(ir) as ir_file:
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stdout = subprocess.check_output(args.tool_binary + ' ' + cmd_args,
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shell=True, stdin=ir_file)
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# Fix line endings to unix CR style.
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stdout = stdout.replace('\r\n', '\n')
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return stdout
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# FIXME: Separate the x86-specific scrubbers, so this can be used for other targets.
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def scrub_asm(asm):
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# Detect shuffle asm comments and hide the operands in favor of the comments.
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asm = SCRUB_X86_SHUFFLES_RE.sub(r'\1 {{.*#+}} \2', asm)
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# Generically match the stack offset of a memory operand.
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asm = SCRUB_X86_SP_RE.sub(r'{{[0-9]+}}(%\1)', asm)
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# Generically match a RIP-relative memory operand.
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asm = SCRUB_X86_RIP_RE.sub(r'{{.*}}(%rip)', asm)
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2016-06-12 04:39:21 +08:00
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# Generically match a LCP symbol.
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asm = SCRUB_X86_LCP_RE.sub(r'{{\.LCPI.*}}', asm)
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2016-03-25 07:19:26 +08:00
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# Strip kill operands inserted into the asm.
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asm = SCRUB_KILL_COMMENT_RE.sub('', asm)
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return asm
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def scrub_body(body, tool_basename):
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# Scrub runs of whitespace out of the assembly, but leave the leading
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# whitespace in place.
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body = SCRUB_WHITESPACE_RE.sub(r' ', body)
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# Expand the tabs used for indentation.
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body = string.expandtabs(body, 2)
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# Strip trailing whitespace.
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body = SCRUB_TRAILING_WHITESPACE_RE.sub(r'', body)
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if tool_basename == "llc":
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body = scrub_asm(body)
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return body
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# Build up a dictionary of all the function bodies.
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def build_function_body_dictionary(raw_tool_output, prefixes, func_dict, verbose, tool_basename):
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if tool_basename == "llc":
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func_regex = LLC_FUNCTION_RE
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else:
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func_regex = OPT_FUNCTION_RE
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for m in func_regex.finditer(raw_tool_output):
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if not m:
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continue
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func = m.group('func')
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scrubbed_body = scrub_body(m.group('body'), tool_basename)
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if func.startswith('stress'):
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# We only use the last line of the function body for stress tests.
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scrubbed_body = '\n'.join(scrubbed_body.splitlines()[-1:])
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if verbose:
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print >>sys.stderr, 'Processing function: ' + func
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for l in scrubbed_body.splitlines():
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print >>sys.stderr, ' ' + l
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for prefix in prefixes:
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if func in func_dict[prefix] and func_dict[prefix][func] != scrubbed_body:
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if prefix == prefixes[-1]:
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print >>sys.stderr, ('WARNING: Found conflicting asm under the '
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'same prefix: %r!' % (prefix,))
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else:
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func_dict[prefix][func] = None
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continue
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func_dict[prefix][func] = scrubbed_body
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# Create a FileCheck variable name based on an IR name.
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def get_value_name(var):
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if var.isdigit():
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var = 'TMP' + var
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var = var.replace('.', '_')
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return var.upper()
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# Create a FileCheck variable from regex.
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def get_value_definition(var):
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return '[[' + get_value_name(var) + ':%.*]]'
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# Use a FileCheck variable.
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def get_value_use(var):
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return '[[' + get_value_name(var) + ']]'
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# Replace IR value defs and uses with FileCheck variables.
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def genericize_check_lines(lines):
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lines_with_def = []
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vars_seen = []
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for line in lines:
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2016-03-28 04:44:35 +08:00
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# An IR variable named '%.' matches the FileCheck regex string.
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line = line.replace('%.', '%dot')
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2016-03-25 07:19:26 +08:00
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m = IR_VALUE_DEF_RE.match(line)
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if m:
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vars_seen.append(m.group(1))
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line = line.replace('%' + m.group(1), get_value_definition(m.group(1)))
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lines_with_def.append(line)
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# A single def isn't worth replacing?
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#if len(vars_seen) < 2:
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# return lines
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output_lines = []
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vars_seen.sort(key=len, reverse=True)
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for line in lines_with_def:
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for var in vars_seen:
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line = line.replace('%' + var, get_value_use(var))
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output_lines.append(line)
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return output_lines
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def add_checks(output_lines, prefix_list, func_dict, func_name, tool_basename):
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# Select a label format based on the whether we're checking asm or IR.
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if tool_basename == "llc":
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check_label_format = "; %s-LABEL: %s:"
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else:
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check_label_format = "; %s-LABEL: @%s("
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printed_prefixes = []
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for checkprefixes, _ in prefix_list:
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for checkprefix in checkprefixes:
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if checkprefix in printed_prefixes:
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break
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if not func_dict[checkprefix][func_name]:
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continue
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# Add some space between different check prefixes, but not after the last
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# check line (before the test code).
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#if len(printed_prefixes) != 0:
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# output_lines.append(';')
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printed_prefixes.append(checkprefix)
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output_lines.append(check_label_format % (checkprefix, func_name))
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func_body = func_dict[checkprefix][func_name].splitlines()
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# For IR output, change all defs to FileCheck variables, so we're immune
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# to variable naming fashions.
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if tool_basename == "opt":
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func_body = genericize_check_lines(func_body)
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2016-04-06 00:49:07 +08:00
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# This could be selectively enabled with an optional invocation argument.
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# Disabled for now: better to check everything. Be safe rather than sorry.
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2016-03-25 07:19:26 +08:00
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# Handle the first line of the function body as a special case because
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# it's often just noise (a useless asm comment or entry label).
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2016-04-06 00:49:07 +08:00
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#if func_body[0].startswith("#") or func_body[0].startswith("entry:"):
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# is_blank_line = True
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#else:
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# output_lines.append('; %s: %s' % (checkprefix, func_body[0]))
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# is_blank_line = False
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# For llc tests, there may be asm directives between the label and the
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# first checked line (most likely that first checked line is "# BB#0").
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if tool_basename == "opt":
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is_blank_line = False
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2016-04-06 00:49:07 +08:00
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else:
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is_blank_line = True;
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2016-03-25 07:19:26 +08:00
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2016-04-06 00:49:07 +08:00
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for func_line in func_body:
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2016-03-25 07:19:26 +08:00
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if func_line.strip() == '':
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is_blank_line = True
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continue
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# Do not waste time checking IR comments.
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if tool_basename == "opt":
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func_line = SCRUB_IR_COMMENT_RE.sub(r'', func_line)
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# Skip blank lines instead of checking them.
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if is_blank_line == True:
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output_lines.append('; %s: %s' % (checkprefix, func_line))
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else:
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output_lines.append('; %s-NEXT: %s' % (checkprefix, func_line))
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is_blank_line = False
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# Add space between different check prefixes and also before the first
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# line of code in the test function.
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output_lines.append(';')
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break
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return output_lines
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def should_add_line_to_output(input_line, prefix_set):
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# Skip any blank comment lines in the IR.
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if input_line.strip() == ';':
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return False
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# Skip any blank lines in the IR.
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#if input_line.strip() == '':
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# return False
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# And skip any CHECK lines. We're building our own.
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m = CHECK_RE.match(input_line)
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if m and m.group(1) in prefix_set:
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return False
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return True
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def main():
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from argparse import RawTextHelpFormatter
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parser = argparse.ArgumentParser(description=__doc__, formatter_class=RawTextHelpFormatter)
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parser.add_argument('-v', '--verbose', action='store_true',
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help='Show verbose output')
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parser.add_argument('--tool-binary', default='llc',
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help='The tool used to generate the test case')
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parser.add_argument(
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'--function', help='The function in the test file to update')
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parser.add_argument('tests', nargs='+')
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args = parser.parse_args()
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2016-04-06 03:50:21 +08:00
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autogenerated_note = (ADVERT + 'utils/' + os.path.basename(__file__))
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2016-03-25 07:19:26 +08:00
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tool_basename = os.path.basename(args.tool_binary)
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if (tool_basename != "llc" and tool_basename != "opt"):
|
|
|
|
|
print >>sys.stderr, 'ERROR: Unexpected tool name: ' + tool_basename
|
|
|
|
|
sys.exit(1)
|
|
|
|
|
|
|
|
|
|
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:
|
|
|
|
|
(tool_cmd, filecheck_cmd) = tuple([cmd.strip() for cmd in l.split('|', 1)])
|
|
|
|
|
|
|
|
|
|
if not tool_cmd.startswith(tool_basename + ' '):
|
|
|
|
|
print >>sys.stderr, 'WARNING: Skipping non-%s RUN line: %s' % (tool_basename, l)
|
|
|
|
|
continue
|
|
|
|
|
|
|
|
|
|
if not filecheck_cmd.startswith('FileCheck '):
|
|
|
|
|
print >>sys.stderr, 'WARNING: Skipping non-FileChecked RUN line: ' + l
|
|
|
|
|
continue
|
|
|
|
|
|
|
|
|
|
tool_cmd_args = tool_cmd[len(tool_basename):].strip()
|
|
|
|
|
tool_cmd_args = tool_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, tool_cmd_args))
|
|
|
|
|
|
|
|
|
|
func_dict = {}
|
|
|
|
|
for prefixes, _ in prefix_list:
|
|
|
|
|
for prefix in prefixes:
|
|
|
|
|
func_dict.update({prefix: dict()})
|
|
|
|
|
for prefixes, tool_args in prefix_list:
|
|
|
|
|
if args.verbose:
|
|
|
|
|
print >>sys.stderr, 'Extracted tool cmd: ' + tool_basename + ' ' + tool_args
|
|
|
|
|
print >>sys.stderr, 'Extracted FileCheck prefixes: ' + str(prefixes)
|
|
|
|
|
|
|
|
|
|
raw_tool_output = invoke_tool(args, tool_args, test)
|
|
|
|
|
build_function_body_dictionary(raw_tool_output, prefixes, func_dict, args.verbose, tool_basename)
|
|
|
|
|
|
|
|
|
|
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, tool_basename)
|
|
|
|
|
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.
|
2016-03-28 04:43:02 +08:00
|
|
|
# Except make leading whitespace uniform: 2 spaces.
|
|
|
|
|
input_line = SCRUB_LEADING_WHITESPACE_RE.sub(r' ', input_line)
|
2016-03-25 07:19:26 +08:00
|
|
|
output_lines.append(input_line)
|
|
|
|
|
else:
|
|
|
|
|
continue
|
|
|
|
|
if input_line.strip() == '}':
|
|
|
|
|
is_in_function = False
|
|
|
|
|
continue
|
|
|
|
|
|
2016-04-06 03:50:21 +08:00
|
|
|
# Discard any previous script advertising.
|
|
|
|
|
if input_line.startswith(ADVERT):
|
2016-03-25 07:19:26 +08:00
|
|
|
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()
|
|
|
|
|
|
