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# Tests that call 'compiler_stats_num_field' are skipped when debugging is on.
# See testsuite/driver/testlib.py.

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def no_lint(name, opts):
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   opts.compiler_always_flags = \
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       [opt for opt in opts.compiler_always_flags if opt != '-dcore-lint' and opt != '-dcmm-lint']
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setTestOpts(no_lint)
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# Note [residency]
#
# Residency (peak_megabytes_allocated and max_bytes_used) is sensitive
# to when the major GC runs, which makes it inherently inaccurate.
# Sometime an innocuous change somewhere can shift things around such
# that the samples occur at a different time, and the residency
# appears to change (up or down) when the underlying profile hasn't
# really changed.
#
# However, please don't just ignore changes in residency.  If you see
# a change in one of these figures, please check whether it is real or
# not as follows:
#
#  * Run the test with old and new compilers, adding +RTS -h -i0.01
#    (you don't need to compile anything for profiling or enable profiling
#    libraries to get a heap profile).
#  * view the heap profiles, read off the maximum residency.  If it has
#    really changed, then you know there's an issue.

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test('T1969',
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     [compiler_stats_num_field('peak_megabytes_allocated', # Note [residency]
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          [(wordsize(32), 17, 15),
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             # 2010-05-17 14 (x86/Windows)
             #            15 (x86/OS X)
             #            19 (x86/OS X)
             # 2013-02-10 13 (x86/Windows)
             # 2013-02-10 14 (x86/OSX)
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             # 2013-11-13 17 (x86/Windows, 64bit machine)
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           (wordsize(64), 41, 20)]),
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             #            28 (amd64/Linux)
             #            34 (amd64/Linux)
             # 2012-09-20 23 (amd64/Linux)
             # 2012-10-03 25 (amd64/Linux if .hi exists)
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             # 2013-02-13 23, but unstable so increased to 10% range
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             # 2013-02-13 27, very unstable!
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             # 2014-09-10 29 (amd64/Linux) post-AMP-cleanup
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             # 2013-09-11 30, 10 (amd64/Linux)
             # 2013-09-11 30, 15 (adapt to Phab CI)
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             # 2015-06-03 41, (amd64/Linux) use +RTS -G1
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      compiler_stats_num_field('max_bytes_used',
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          [(platform('i386-unknown-mingw32'), 5719436, 20),
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                                 # 2010-05-17 5717704 (x86/Windows)
                                 # 2013-02-10 5159748 (x86/Windows)
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                                 # 2013-02-10 5030080 (x86/Windows)
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                                 # 2013-11-13 7295012 (x86/Windows, 64bit machine)
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                                 # 2014-04-24 5719436 (x86/Windows, 64bit machine)
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           (wordsize(32), 5949188, 1),
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             #            6707308 (x86/OS X)
             # 2009-12-31 6149572 (x86/Linux)
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             # 2014-01-22 6429864 (x86/Linux)
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             # 2014-06-29 5949188 (x86/Linux)
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           (wordsize(64), 11000000, 15)]),
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             # 2014-09-10 10463640, 10  # post-AMP-update (somewhat stabelish)
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               # looks like the peak is around ~10M, but we're
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               # unlikely to GC exactly on the peak.
               # varies quite a lot with CLEANUP and BINDIST,
               # hence 10% range.
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               # See Note [residency] to get an accurate view.
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             # 2014-09-14  9684256, 10 # try to lower it a bit more to match Phab's CI
             # 2014-11-03 10584344,    # ghcspeed reports higher numbers consistently
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             # 2015-07-11 11670120 (amd64/Linux)
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      compiler_stats_num_field('bytes allocated',
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          [(platform('i386-unknown-mingw32'), 301784492, 5),
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                                 #            215582916 (x86/Windows)
                                 # 2012-10-29 298921816 (x86/Windows)
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                                 # 2013-02-10 310633884 (x86/Windows)
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                                 # 2013-11-13 317975916 (x86/Windows, 64bit machine)
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                                 # 2014-04-04 301784492 (x86/Windows, 64bit machine)
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           (wordsize(32), 303300692, 1),
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             #            221667908 (x86/OS X)
             #            274932264 (x86/Linux)
             # 2012-10-08 303930948 (x86/Linux, new codegen)
             # 2013-02-10 322937684 (x86/OSX)
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             # 2014-01-22 316103268 (x86/Linux)
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             # 2014-06-29 303300692 (x86/Linux)
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           (wordsize(64), 581460896, 5)]),
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             # 17/11/2009 434845560 (amd64/Linux)
             # 08/12/2009 459776680 (amd64/Linux)
             # 17/05/2010 519377728 (amd64/Linux)
             # 05/08/2011 561382568 (amd64/OS X)
             # 16/07/2012 589168872 (amd64/Linux)
             # 20/07/2012 595936240 (amd64/Linux)
             # 23/08/2012 606230880 (amd64/Linux)
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             # 29/08/2012 633334184 (amd64/Linux) new codegen
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             # 18/09/2012 641959976 (amd64/Linux)
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             # 19/10/2012 661832592 (amd64/Linux) -fPIC turned on
             # 23/10/2012 642594312 (amd64/Linux) -fPIC turned off again
             # 12/11/2012 658786936 (amd64/Linux) UNKNOWN REASON
             # 17/1/13:   667160192 (x86_64/Linux) new demand analyser
             # 18/10/2013 698612512 (x86_64/Linux) fix for #8456
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             # 10/02/2014 660922376 (x86_64/Linux) call arity analysis
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             # 17/07/2014 651626680 (x86_64/Linux) roundabout update
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             # 10/09/2014 630299456 (x86_64/Linux) post-AMP-cleanup
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             # 03/06/2015 581460896 (x86_64/Linux) use +RTS -G1
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      only_ways(['normal']),
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      extra_hc_opts('-dcore-lint -static'),
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          # Leave -dcore-lint on for this one test, so that we have something
          # that will catch a regression in -dcore-lint performance.
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      # Use `+RTS -G1` for more stable residency measurements. Note [residency].
      # Only 64-bit as we don't have a good 32-bit test environment at the moment
      when(wordsize(64), extra_hc_opts('+RTS -G1 -RTS'))
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      ],
     compile,
     [''])

# This one tests for the space leak in the native code generator,
# where it holds onto the entire asm output until the end.  The space
# leak reappears from time to time, so it's a good idea to have a test
# for it.  The residency of this test will jump by 10MB to 40MB or so
# on x86-64 if the space leak appears.

# Only run this one if we have an NCG:
if 'optasm' in config.compile_ways:
   conf_3294 = only_ways(['normal'])
else:
   conf_3294 = skip

test('T3294',
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     [
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      compiler_stats_num_field('max_bytes_used', # Note [residency]
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          [(wordsize(32), 26525384, 15),
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             #            17725476 (x86/OS X)
             #            14593500 (Windows)
             # 2013-02-10 20651576 (x86/Windows)
             # 2013-02-10 20772984 (x86/OSX)
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             # 2013-11-13 24009436 (x86/Windows, 64bit machine)
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             # 2014-04-24 19882188 (x86/Windows, 64bit machine)
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             # 2014-12-22 26525384 (x86/Windows) Increase due to silent superclasses?

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           (wordsize(64), 45000000, 20)]),
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             # prev:           25753192 (amd64/Linux)
             # 29/08/2012:     37724352 (amd64/Linux)
             #  (increase due to new codegen, see #7198)
             # 13/13/2012:     44894544 (amd64/Linux)
             #  (reason for increase unknown)
             # 15/5/2013:      36904752  (amd64/Linux)
             #  (reason for decrease unknown)
             # 29/5/2013:      43224080  (amd64/Linux)
             #  (reason for increase back to earlier value unknown)
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             # 2014-07-14:     36670800  (amd64/Linux)
             #  (reason unknown, setting expected value somewhere in between)
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             # 2015-01-22:     45000000  (amd64/Linux)
             #  varies between 40959592 and 52914488... increasing to +-20%
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      compiler_stats_num_field('bytes allocated',
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          [(wordsize(32), 1377050640, 5),
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           # previous:     815479800  (x86/Linux)
           # (^ increase due to new codegen, see #7198)
           # 2012-10-08:  1373514844 (x86/Linux)
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           # 2013-11-13: 1478325844  (x86/Windows, 64bit machine)
           # 2014-01-12: 1565185140  (x86/Linux)
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           # 2013-04-04: 1377050640  (x86/Windows, 64bit machine)
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           (wordsize(64), 2709595808, 5)]),
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            # old:        1357587088 (amd64/Linux)
            # 29/08/2012: 2961778696 (amd64/Linux)
            # (^ increase due to new codegen, see #7198)
            # 18/09/2012: 2717327208 (amd64/Linux)
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            # 08/06/2013: 2901451552 (amd64/Linux) (reason unknown)
            # 12/12/2013: 3083825616 (amd64/Linux) (reason unknown)
            # 18/02/2014: 2897630040 (amd64/Linux) (call arity improvements)
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            # 12/03/2014: 2705289664 (amd64/Linux) (more call arity improvements)
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            # 2014-17-07: 2671595512 (amd64/Linux) (round-about update)
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            # 2014-09-10: 2709595808 (amd64/Linux) post-AMP cleanup
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      conf_3294,

      # Use `+RTS -G1` for more stable residency measurements. Note [residency].
      # Only 64-bit as we don't have a good 32-bit test environment at the moment
      when(wordsize(64), extra_hc_opts('+RTS -G1 -RTS'))
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      ],
     compile,
     [''])
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test('T4801',
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     [ # expect_broken(5224),
       # temporarily unbroken (#5227)
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###################################
# deactivated for now, as this metric became too volatile recently
#      compiler_stats_num_field('peak_megabytes_allocated',# Note [residency]
#          [(platform('x86_64-apple-darwin'), 70, 1),
#                           # expected value: 58 (amd64/OS X)
#                           # 13/01/2014 - 70
#           (wordsize(32), 30, 20),
#           (wordsize(64), 48, 20)]),
#            # prev:       50 (amd64/Linux)
#            # 19/10/2012: 64 (amd64/Linux)
#            #                (^ REASON UNKNOWN!)
#            # 12/11/2012: 49 (amd64/Linux)
#            #                (^ REASON UNKNOWN!)
#            # 28/8/13:    60 (amd64/Linux)
#            #                (^ REASON UNKNOWN!)
#            # 2014-09-10: 55 post-AMP-cleanup
#            # 2014-10-08: 62 (jumps between 55 and 71 observed -- GC tipping point?)
#            # 2014-10-13: 48 stricter seqDmdType
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      compiler_stats_num_field('bytes allocated',
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          [(platform('x86_64-apple-darwin'), 434058304, 5),
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                           # expected value: 510938976 (amd64/OS X):
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           (wordsize(32), 203962148, 10),
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           # prev:        185669232 (x86/OSX)
           # 2014-01-22:  211198056 (x86/Linux)
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           # 2014-09-03:  185242032 (Windows laptop)
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           # 2014-12-01:  203962148 (Windows laptop)
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           (wordsize(64), 382056344, 10)]),
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            # prev:       360243576 (amd64/Linux)
            # 19/10/2012: 447190832 (amd64/Linux) (-fPIC turned on)
            # 19/10/2012: 392409984 (amd64/Linux) (-fPIC turned off)
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            # 2014-04-08: 362939272 (amd64/Linux) cumulation of various smaller improvements over recent commits
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            # 2014-10-08: 382056344 (amd64/Linux) stricter foldr2 488e95b
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###################################
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# deactivated for now, as this metric became too volatile recently
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#
#     compiler_stats_num_field('max_bytes_used',
#         [(platform('x86_64-apple-darwin'), 25145320, 5),
#          (wordsize(32), 11829000, 15),
#            #              9651948 (x86/OSX)
#            #              10290952 (windows)
#            # 2013-02-10   11071060 (x86/Windows)
#            # 2013-02-10:  11207828 (x86/OSX)
#            # (some date): 11139444
#            # 2013-11-13:  11829000 (x86/Windows, 64bit machine)
#          (wordsize(64), 19296544, 15)]),
#               # prev:       20486256 (amd64/OS X)
#               # 30/08/2012: 17305600--20391920 (varies a lot)
#               # 19/10/2012: 26882576 (-fPIC turned on)
#               # 19/10/2012: 18619912 (-fPIC turned off)
#               # 24/12/2012: 21657520 (perhaps gc sampling time wibbles?)
#               # 10/01/2014: 25166280
#               # 13/01/2014: 22646000 (mostly due to #8647)
#               # 18/02/2014: 25002136 (call arity analysis changes)
#               # 12/05/2014: 25002136 (specialisation and inlining changes)
#               # 10/09/2014: 19296544, 10 (post-AMP-cleanup)
#               # 14/09/2014: 19585456, 15 (adapt to Phab CI env)
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       only_ways(['normal']),
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       extra_hc_opts('-static'),

       # Use `+RTS -G1` for more stable residency measurements. Note [residency].
       # Only 64-bit as we don't have a good 32-bit test environment at the moment
       when(wordsize(64), extra_hc_opts('+RTS -G1 -RTS'))
       ],
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     compile,
     [''])

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test('T3064',
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     [compiler_stats_num_field('peak_megabytes_allocated',# Note [residency]
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          [(wordsize(32), 16, 20),
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            # expected value: 14 (x86/Linux 28-06-2012):
            # 2013-11-13:     18 (x86/Windows, 64bit machine)
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            # 2014-01-22:     23 (x86/Linux)
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            # 2014-12-22:     23 (x86/Linux) death to silent superclasses
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           (wordsize(64), 54, 20)]),
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            # (amd64/Linux):            18
            # (amd64/Linux) 2012-02-07: 26
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            # (amd64/Linux) 2013-02-12: 23; increased range to 10%
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            # (amd64/Linux) 2013-04-03: 26
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            # (amd64/Linux) 2013-09-11: 30; result of AMP patch
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            # Increased range to 20%.  peak-usage varies from 22 to 26,
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            #  depending on whether the old .hi file exists
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            # (amd64/Linux) 2013-09-11: 37; better arity analysis (weird)
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            # (amd64/Linux) (09/09/2014): 42, AMP changes (larger interfaces, more loading)
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            # (amd64/Linux) 2014-10-13: 38: Stricter seqDmdType
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            # (amd64/Linux) 2014-12-22: 27: death to silent superclasses
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            # (amd64/Linux) 2015-01-22: 32: Varies from 30 to 34, at least here.
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            # (amd64/Linux) 2015-06-03: 54: use +RTS -G1
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      compiler_stats_num_field('bytes allocated',
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          [(wordsize(32), 122836340, 10),
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            # 2011-06-28: 56380288  (x86/Linux)
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            # 2012-10-30: 111189536 (x86/Windows)
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            # 2013-11-13: 146626504 (x86/Windows, 64bit machine)
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            # 2014-01-22: 162457940 (x86/Linux)
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            # 2014-12-01: 162457940 (Windows)
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            # 2014-12-22: 122836340 (Windows) Death to silent superclasses
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           (wordsize(64), 243670824, 5)]),
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            # (amd64/Linux) (28/06/2011):  73259544
            # (amd64/Linux) (07/02/2013): 224798696
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            # (amd64/Linux) (02/08/2013): 236404384, increase from roles
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            # (amd64/Linux) (11/09/2013): 290165632, increase from AMP warnings
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            # (amd64/Linux) (22/11/2013): 308300448, GND via Coercible and counters for constraints solving
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            # (amd64/Linux) (02/12/2013): 329795912, Coercible refactor
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            # (amd64/Linux) (11/02/2014): 308422280, optimize Coercions in simpleOptExpr
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            # (amd64/Linux) (23/05/2014): 324022680, unknown cause
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            # (amd64/Linux) (2014-07-17): 332702112, general round of updates
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            # (amd64/Linux) (2014-08-29): 313638592, w/w for INLINABLE things
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            # (amd64/Linux) (09/09/2014): 407416464, AMP changes (larger interfaces, more loading)
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            # (amd64/Linux) (14/09/2014): 385145080, BPP changes (more NoImplicitPrelude in base)
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            # (amd64/Linux) (10/12/2014): 363103840, improvements in constraint solver
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            # (Mac)         (18/12/2014): 350418600, improvements to flattener
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            # (amd64/Linux) (22/12/2014): 243670824, Ha! Death to superclass constraints, makes
            #                                        much less code for Monad instances
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###################################
# deactivated for now, as this metric became too volatile recently
#
#      compiler_stats_num_field('max_bytes_used',
#          [(wordsize(32), 11202304, 20),
#            # 2011-06-28:  2247016 (x86/Linux) (28/6/2011):
#            #(some date):  5511604
#            # 2013-11-13:  7218200 (x86/Windows, 64bit machine)
#            # 2014-04-04: 11202304 (x86/Windows, 64bit machine)
#           (wordsize(64), 13251728, 20)]),
#            # (amd64/Linux, intree) (28/06/2011):  4032024
#            # (amd64/Linux, intree) (07/02/2013):  9819288
#            # (amd64/Linux)         (14/02/2013):  8687360
#            # (amd64/Linux)         (18/02/2013):  9397488
#            # (amd64/Linux)         (02/08/2013): 10742536, increase from roles
#            # (amd64/Linux)         (19/08/2013): 9211816,  decrease apparently from better eta reduction
#            # (amd64/Linux)         (11/09/2013): 12000480, increase from AMP warnings
#            #                                     933cdf15a2d85229d3df04b437da31fdfbf4961f
#            # (amd64/Linux)         (22/11/2013): 16266992, GND via Coercible and counters for constraints solving
#            # (amd64/Linux)         (12/12/2013): 19821544, better One shot analysis
#            # (amd64/Linux)         (09/09/2014): 24357392, AMP changes (larger interfaces, more loading)
#            # (amd64/Linux)         (14/09/2014): 16053888, BPP changes (more NoImplicitPrelude in base)
#            # (amd64/Linux)         (19/09/2014): 18744992, unknown
#            # (amd64/Linux)         2014-10-13:   13251728, Stricter seqDmdType
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       only_ways(['normal']),

       # Use `+RTS -G1` for more stable residency measurements. Note [residency].
       # Only 64-bit as we don't have a good 32-bit test environment at the moment
       when(wordsize(64), extra_hc_opts('+RTS -G1 -RTS'))
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      ],
     compile,
     [''])

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test('T4007',
     normal,
     run_command,
     ['$MAKE -s --no-print-directory T4007'])

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test('T5030',
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     [compiler_stats_num_field('bytes allocated',
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          [(wordsize(32), 227205560, 10),
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           # previous:    196457520
           # 2012-10-08:  259547660 (x86/Linux, new codegen)
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           # 2013-11-21:  198573456 (x86 Windows, 64 bit machine)
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           # 2014-12-10:  227205560 constraint solver got worse again; more aggressive solving
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           #                        of family-applications leads to less sharing, I think

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           (wordsize(64), 403932600, 10)]),
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             # Previously 530000000 (+/- 10%)
             # 17/1/13:   602993184  (x86_64/Linux)
             #            (new demand analyser)
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             # 2013-06-08 538467496  (x86_64/Linux)
             # ^ reason unknown
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             # 2013-08-02 454498592  (amd64/Linux)
             # decrease from more aggressive coercion optimisations from roles
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             # 2013-11-12 397672152  (amd64/Linux)
             # big decrease following better CSE and arity
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             # 2014-07-17 409314320  (amd64/Linux)
             # general round of updates
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             # 2014-09-10 385152728  post-AMP-cleanup
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             # 2014-12-08 340969128  constraint solver perf improvements (esp kick-out)
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             # 2014-12-10 449042120  constraint solver got worse again; more aggressive solving
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             #                          of family-applications leads to less sharing, I think
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             # 2015-03-17 403932600  tweak to solver algorithm
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       only_ways(['normal'])
      ],
     compile,
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     ['-freduction-depth=300'])
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test('T5631',
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     [compiler_stats_num_field('bytes allocated',
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          [(wordsize(32), 390199244, 10),
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        # expected value: 392904228 (x86/Linux)
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        # 2014-04-04:     346389856 (x86 Windows, 64 bit machine)
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        # 2014-12-01:     390199244 (Windows laptop)
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           (wordsize(64), 812288344, 5)]),
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        # expected value: 774595008 (amd64/Linux):
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        # expected value: 735486328 (amd64/Linux) 2012/12/12:
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        # expected value: 690742040 (amd64/Linux) Call Arity improvements
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        # 2014-09-09:     739704712 (amd64/Linux) AMP changes
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        # 2014-11-04:     776121120 (amd64/Linux) new-flatten-skolems
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        # 2015-06-01:     812288344 (amd64/Linux) unknown cause
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       only_ways(['normal'])
      ],
     compile,
     [''])

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test('parsing001',
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     [compiler_stats_num_field('bytes allocated',
          [(wordsize(32), 274000576, 10),
           (wordsize(64), 587079016, 5)]),
        # expected value: 587079016 (amd64/Linux)
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       only_ways(['normal']),
      ],
     compile_fail, [''])


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test('T783',
     [ only_ways(['normal']),  # no optimisation for this one
      # expected value: 175,569,928 (x86/Linux)
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      compiler_stats_num_field('bytes allocated',
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          [(wordsize(32), 235002220, 5),
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            # 2012-10-08: 226907420 (x86/Linux)
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            # 2013-02-10: 329202116 (x86/Windows)
            # 2013-02-10: 338465200 (x86/OSX)
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            # 2014-04-04: 319179104 (x86 Windows, 64 bit machine)
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            # 2014-09-03: 223377364 (Windows) better specialisation, raft of core-to-core optimisations
            # 2014-12-22: 235002220 (Windows) not sure why
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           (wordsize(64), 548288760, 10)]),
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            # prev:       349263216 (amd64/Linux)
            # 07/08/2012: 384479856 (amd64/Linux)
            # 29/08/2012: 436927840 (amd64/Linux)
            # 12/11/2012: 640324528 (amd64/Linux)
            #   (OldCmm removed: not sure why this got worse, the
            #    other perf tests remained about the same)
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            # 18/10/2013: 734038080 (amd64/Linux)
            #   (fix for #8456)
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            # 24/10/2013: 654804144 (amd64/Linux)
            #   (fix previous fix for #8456)
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            # 2014-07-17: 640031840 (amd64/Linux)
            #   (general round of updates)
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            # 2014-08-29: 441932632  (amd64/Linux)
            #   (better specialisation, raft of core-to-core optimisations)
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            # 2014-08-29: 719814352  (amd64/Linux)
	    #   (changed order of cmm block causes analyses to allocate much more,
	    #    but the changed order is slighly better in terms of runtime, and
	    #    this test seems to be an extreme outlier.)
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            # 2015-05-16: 548288760  (amd64/Linux)
	    #   (improved sequenceBlocks in nativeCodeGen, #10422)
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      extra_hc_opts('-static')
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      ],
      compile,[''])
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test('T5321Fun',
     [ only_ways(['normal']),  # no optimisation for this one
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       compiler_stats_num_field('bytes allocated',
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           [(wordsize(32), 206406188, 10),
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             # prev:       300000000
             # 2012-10-08: 344416344 x86/Linux
             #  (increase due to new codegen)
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             # 2014-09-03: 299656164     (specialisation and inlining)
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             # 10/12/2014: 206406188     #  Improvements in constraint solver
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            (wordsize(64), 429921312, 10)])
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             # prev:       585521080
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             # 29/08/2012: 713385808     #  (increase due to new codegen)
             # 15/05/2013: 628341952     #  (reason for decrease unknown)
             # 24/06/2013: 694019152     #  (reason for re-increase unknown)
             # 12/05/2014: 614409344     #  (specialisation and inlining changes)
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             # 10/09/2014: 601629032     #  post-AMP-cleanup
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             # 06/11/2014: 541287000     #  Simon's flat-skol changes to the constraint solver
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             # 10/12/2014: 408110888     #  Improvements in constraint solver
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             # 16/12/2014: 429921312     #  Flattener parameterized over roles
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      ],
      compile,[''])

test('T5321FD',
     [ only_ways(['normal']),  # no optimisation for this one
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      compiler_stats_num_field('bytes allocated',
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          [(wordsize(32), 211699816, 10),
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            # prev:       213380256
            # 2012-10-08: 240302920 (x86/Linux)
            #  (increase due to new codegen)
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            # 2014-07-31: 211699816 (Windows) (-11%)
            #  (due to better optCoercion, 5e7406d9, #9233)
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           (wordsize(64), 410895536, 10)])
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            # prev:       418306336
            # 29/08/2012: 492905640
            #  (increase due to new codegen)
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            # 15/05/2013: 406039584
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            #  (reason for decrease unknown)
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            # 08/06/2013: 476497048
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            #  (reason for increase unknown)
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            # before 2014-07-17: 441997096
            #  (with -8%, still in range, hence cause not known)
            # 2014-07-17: 426960992 (-11% of previous value)
            #  (due to better optCoercion, 5e7406d9, #9233)
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            # 2014-10-08  410895536
            #  (various changes; biggest improvements due to 949ad67 and FastString package ids)
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      ],
      compile,[''])
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test('T5642',
     [ only_ways(['normal']),
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       compiler_stats_num_field('bytes allocated',
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           [(wordsize(32), 641085256, 10),
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                     # sample from x86/Linux
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            # prev:        650000000
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            # 2014-09-03:  753045568 
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            # 2014-12-10:  641085256 Improvements in constraints solver
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            (wordsize(64), 1282916024, 10)])
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            # prev:        1300000000
            # 2014-07-17:  1358833928 (general round of updates)
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            # 2014-08-07:  1402242360 (caused by 1fc60ea)
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# Watch out for:
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            # 23/05/2014:  1452688392 (More aggressive specialisation means we get
            #                          specialised copies of imported functions that
            #                          are ultimately discarded by trimAutoRules
            #                          It's a bizarre program with LOTS of data types)
            # 2014-09-10:  1536924976 post-AMP-cleanup
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            # 2014-12-10:  1282916024 Improvements in constraints solver
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      ],
      compile,['-O'])
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test('T5837',
     [ only_ways(['normal']),
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      compiler_stats_num_field('bytes allocated',
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          [(wordsize(32), 115905208, 10),
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             # 40000000 (x86/Linux)
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             # 2013-11-13:  45520936 (x86/Windows, 64bit machine)
             # 2014-09-03:  37096484 (Windows laptop, w/w for INLINABLE things
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             # 2014-12-01: 135914136 (Windows laptop, regression see below)
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             # 2014-12-08  115905208  Constraint solver perf improvements (esp kick-out)
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           (wordsize(64), 38834096, 10)])
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             # sample: 3926235424 (amd64/Linux, 15/2/2012)
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             # 2012-10-02 81879216
             # 2012-09-20 87254264 amd64/Linux
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             # 2013-09-18 90587232 amd64/Linux
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             # 2013-11-21 86795752 amd64/Linux, GND via Coercible and counters
             #                                  for constraints solving
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             # 2014-08-29 73639840 amd64/Linux, w/w for INLINABLE things
             # 2014-10-08 73639840 amd64/Linux, Burning Bridges and other small changes
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             # 2014-11-06 271028976       Linux, Accept big regression;
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             #   See Note [An alternative story for the inert substitution] in TcFlatten
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             # 2014-12-08 234790312 Constraint solver perf improvements (esp kick-out)
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             # 2014-12-16 231155640 Mac  Flattener parameterized over roles;
             #                           some optimization
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             # 2015-03-17 53424304  Mac  Better depth checking; fails earlier
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             # 2015-06-09 38834096  Better "improvement"; I'm not sure whey it improves things
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      ],
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      compile_fail,['-freduction-depth=50'])
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test('T6048',
     [ only_ways(['optasm']),
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      compiler_stats_num_field('bytes allocated',
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          [(wordsize(32), 49987836, 10),
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            # prev:       38000000 (x86/Linux)
            # 2012-10-08: 48887164 (x86/Linux)
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            # 2014-04-04: 62618072 (x86 Windows, 64 bit machine)
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            # 2014-09-03: 56315812 (x86 Windows, w/w for INLINEAVBLE)
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            # 2014-12-01: 49987836 (x86 Windows)

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           (wordsize(64),  95946688, 12)])
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             # 18/09/2012  97247032 amd64/Linux
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             # 16/01/2014 108578664 amd64/Linux (unknown, likely foldl-via-foldr)
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             # 18/01/2014  95960720 amd64/Linux Call Arity improvements
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             # 28/02/2014 105556793 amd64/Linux (unknown, tweak in base/4d9e7c9e3 resulted in change)
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             # 05/03/2014 110646312 amd64/Linux Call Arity became more elaborate
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             # 14/07/2014 125431448 amd64/Linux unknown reason. Even worse in GHC-7.8.3. *shurg*
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             # 29/08/2014 108354472 amd64/Linux w/w for INLINABLE things
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             # 14/09/2014  88186056 amd64/Linux BPP part1 change (more NoImplicitPreludes in base)
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             # 08/01/2014  95946688 amd64/Linux Mostly 4c834fd. Occasional spikes to 103822120!
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      ],
      compile,[''])
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test('T9020',
     [ only_ways(['optasm']),
      compiler_stats_num_field('bytes allocated',
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          [(wordsize(32), 343005716, 10),
           # Original:    381360728
           # 2014-07-31:  343005716 (Windows) (general round of updates)
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           (wordsize(64), 680162056, 10)])
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           # prev:        795469104
           # 2014-07-17:  728263536 (general round of updates)
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           # 2014-09-10:  785871680 post-AMP-cleanup
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           # 2014-11-03:  680162056 Further Applicative and Monad adjustments
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      ],
      compile,[''])
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test('T9675',
     [ only_ways(['optasm']),
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       compiler_stats_num_field('max_bytes_used', # Note [residency]
          [(wordsize(64), 28056344, 15),
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          # 2014-10-13    29596552
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          # 2014-10-13    26570896   seq the DmdEnv in seqDmdType as well
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          # 2014-10-13    18582472   different machines giving different results..
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          # 2014-10-13    22220552   use the mean
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          # 2015-06-21    28056344   switch to `+RTS -G1`, tighten bound to 15%
           (wordsize(32), 11220552, 15)
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          ]),
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       compiler_stats_num_field('peak_megabytes_allocated', # Note [residency]
          [(wordsize(64), 105, 15),
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          # 2014-10-13    66
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          # 2014-10-13    58         seq the DmdEnv in seqDmdType as well
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          # 2014-10-13    49         different machines giving different results...
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          # 2014-10-13    53         use the mean
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          # 2015-06-15    44         reduced for some reason
          # 2015-06-21    105        switch to `+RTS -G1`
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            (wordsize(32), 25, 15)
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          ]),
       compiler_stats_num_field('bytes allocated',
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          [(wordsize(64), 544489040, 10)
          # 2014-10-13    544489040
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          ,(wordsize(32), 250000000, 10)
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          ]),
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       # Use `+RTS -G1` for more stable residency measurements. Note [residency].
       # Only 64-bit as we don't have a good 32-bit test environment at the moment
       when(wordsize(64), extra_hc_opts('+RTS -G1 -RTS'))
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      ],
     compile,
     [''])
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test('T9872a',
     [ only_ways(['normal']),
       compiler_stats_num_field('bytes allocated',
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          [(wordsize(64), 2680733672, 5),
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          # 2014-12-10    5521332656    Initally created
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          # 2014-12-16    5848657456    Flattener parameterized over roles
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          # 2014-12-18    2680733672    Reduce type families even more eagerly
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           (wordsize(32), 1325592896, 5)
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          ]),
      ],
     compile_fail,
     [''])

test('T9872b',
     [ only_ways(['normal']),
       compiler_stats_num_field('bytes allocated',
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          [(wordsize(64), 3480212048, 5),
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          # 2014-12-10    6483306280    Initally created
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          # 2014-12-16    6892251912    Flattener parameterized over roles
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          # 2014-12-18    3480212048    Reduce type families even more eagerly
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           (wordsize(32), 1700000000, 5)
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          ]),
      ],
     compile_fail,
     [''])
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test('T9872c',
     [ only_ways(['normal']),
       compiler_stats_num_field('bytes allocated',
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          [(wordsize(64), 2963554096, 5),
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          # 2014-12-10    5495850096    Initally created
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          # 2014-12-16    5842024784    Flattener parameterized over roles
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          # 2014-12-18    2963554096    Reduce type families even more eagerly
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           (wordsize(32), 1500000000, 5)
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          ]),
      ],
     compile_fail,
     [''])
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test('T9872d',
     [ only_ways(['normal']),
       compiler_stats_num_field('bytes allocated',
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          [(wordsize(64), 726679784, 5),
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          # 2014-12-18    796071864   Initally created
          # 2014-12-18    739189056   Reduce type families even more eagerly
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          # 2015-01-07    687562440   TrieMap leaf compression
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          # 2015-03-17    726679784   tweak to solver; probably flattens more
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           (wordsize(32), 328810212, 5)
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          ]),
      ],
     compile,
     [''])
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test('T9961',
     [ only_ways(['normal']),
       compiler_stats_num_field('bytes allocated',
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          [(wordsize(64), 663978160, 5),
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          # 2015-01-12    807117816   Initally created
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          # 2015-spring   772510192   Got better
          # 2015-05-22    663978160   Fix for #10370 improves it more
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           (wordsize(32), 375647160, 5)
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          ]),
      ],
     compile,
     ['-O'])