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annotate utils/testgen/mc-bundling-x86-gen.py @ 140:276c179585fe

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Added tag LLVM5.0.1 for changeset 3a76565eade5
author mir3636
date Tue, 03 Apr 2018 19:09:39 +0900
parents 95c75e76d11b
children
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
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95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
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1
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2 #!/usr/bin/python
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3
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4 # Auto-generates an exhaustive and repetitive test for correct bundle-locked
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Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
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5 # alignment on x86.
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6 # For every possible offset in an aligned bundle, a bundle-locked group of every
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Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
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7 # size in the inclusive range [1, bundle_size] is inserted. An appropriate CHECK
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8 # is added to verify that NOP padding occurred (or did not occur) as expected.
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9 # Run with --align-to-end to generate a similar test with align_to_end for each
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10 # .bundle_lock directive.
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11
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12 # This script runs with Python 2.7 and 3.2+
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13
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14 from __future__ import print_function
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Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
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15 import argparse
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16
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17 BUNDLE_SIZE_POW2 = 4
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18 BUNDLE_SIZE = 2 ** BUNDLE_SIZE_POW2
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19
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Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
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20 PREAMBLE = '''
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21 # RUN: llvm-mc -filetype=obj -triple i386-pc-linux-gnu %s -o - \\
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22 # RUN: | llvm-objdump -triple i386 -disassemble -no-show-raw-insn - | FileCheck %s
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23
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24 # !!! This test is auto-generated from utils/testgen/mc-bundling-x86-gen.py !!!
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25 # It tests that bundle-aligned grouping works correctly in MC. Read the
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26 # source of the script for more details.
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27
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28 .text
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Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
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29 .bundle_align_mode {0}
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Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
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30 '''.format(BUNDLE_SIZE_POW2).lstrip()
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31
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32 ALIGNTO = ' .align {0}, 0x90'
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Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
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33 NOPFILL = ' .fill {0}, 1, 0x90'
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34
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35 def print_bundle_locked_sequence(len, align_to_end=False):
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36 print(' .bundle_lock{0}'.format(' align_to_end' if align_to_end else ''))
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37 print(' .rept {0}'.format(len))
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38 print(' inc %eax')
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39 print(' .endr')
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40 print(' .bundle_unlock')
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41
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42 def generate(align_to_end=False):
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43 print(PREAMBLE)
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44
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45 ntest = 0
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46 for instlen in range(1, BUNDLE_SIZE + 1):
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47 for offset in range(0, BUNDLE_SIZE):
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48 # Spread out all the instructions to not worry about cross-bundle
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49 # interference.
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50 print(ALIGNTO.format(2 * BUNDLE_SIZE))
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51 print('INSTRLEN_{0}_OFFSET_{1}:'.format(instlen, offset))
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52 if offset > 0:
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53 print(NOPFILL.format(offset))
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54 print_bundle_locked_sequence(instlen, align_to_end)
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55
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Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
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56 # Now generate an appropriate CHECK line
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Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
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57 base_offset = ntest * 2 * BUNDLE_SIZE
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Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
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58 inst_orig_offset = base_offset + offset # had it not been padded...
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59
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60 def print_check(adjusted_offset=None, nop_split_offset=None):
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61 if adjusted_offset is not None:
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62 print('# CHECK: {0:x}: nop'.format(inst_orig_offset))
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63 if nop_split_offset is not None:
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64 print('# CHECK: {0:x}: nop'.format(nop_split_offset))
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65 print('# CHECK: {0:x}: incl'.format(adjusted_offset))
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66 else:
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67 print('# CHECK: {0:x}: incl'.format(inst_orig_offset))
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68
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69 if align_to_end:
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70 if offset + instlen == BUNDLE_SIZE:
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71 # No padding needed
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72 print_check()
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73 elif offset + instlen < BUNDLE_SIZE:
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74 # Pad to end at nearest bundle boundary
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75 offset_to_end = base_offset + (BUNDLE_SIZE - instlen)
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76 print_check(offset_to_end)
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77 else: # offset + instlen > BUNDLE_SIZE
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78 # Pad to end at next bundle boundary, splitting the nop sequence
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79 # at the nearest bundle boundary
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80 offset_to_nearest_bundle = base_offset + BUNDLE_SIZE
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81 offset_to_end = base_offset + (BUNDLE_SIZE * 2 - instlen)
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82 if offset_to_nearest_bundle == offset_to_end:
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83 offset_to_nearest_bundle = None
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84 print_check(offset_to_end, offset_to_nearest_bundle)
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85 else:
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86 if offset + instlen > BUNDLE_SIZE:
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87 # Padding needed
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88 aligned_offset = (inst_orig_offset + instlen) & ~(BUNDLE_SIZE - 1)
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89 print_check(aligned_offset)
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90 else:
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91 # No padding needed
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92 print_check()
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93
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94 print()
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95 ntest += 1
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96
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97 if __name__ == '__main__':
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98 argparser = argparse.ArgumentParser()
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99 argparser.add_argument('--align-to-end',
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100 action='store_true',
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Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
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101 help='generate .bundle_lock with align_to_end option')
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Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
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102 args = argparser.parse_args()
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Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
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103 generate(align_to_end=args.align_to_end)