Richards optCoercion improvement made test cases fail the nice way
[ghc.git] / testsuite / tests / perf / compiler / all.T
index 83b458d..fcaec8e 100644 (file)
@@ -5,56 +5,90 @@ def no_lint(name, opts):
 setTestOpts(no_lint)
 
 
+# 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.
+
 test('T1969',
-     [when(wordsize(32),
-          compiler_stats_range_field('peak_megabytes_allocated', 18, 1)),
-                             # expected value: 14 (x86/Windows 17/05/10)
-                             #                 15 (x86/OS X)
-                             #                 19 (x86/OS X)
-      when(wordsize(64),
-          compiler_stats_range_field('peak_megabytes_allocated', 25, 1)),
-                                             # expected value: 28 (amd64/Linux)
-                                             # expected value: 34 (amd64/Linux)
-                                             # 2012-09-20      23 (amd64/Linux)
-                                             # 2012-10-03      25 (amd64/Linux if .hi exists)
-      when(wordsize(32),
-          compiler_stats_range_field('max_bytes_used', 6149572, 5)),
-                             # expected value: 6707308 (x86/OS X)
-                             #                 5717704 (x86/Windows 17/05/10)
-                             #                 6149572 (x86/Linux, 31/12/09)
-      when(wordsize(64),
-          compiler_stats_range_field('max_bytes_used', 9000000, 20)),
-                                  # looks like the peak is around 10M, but we're
-                                  # unlikely to GC exactly on the peak.
-                                  # varies quite a lot with CLEANUP and BINDIST,
-                                  # hence 10% range.
-      when(wordsize(32),
-          compiler_stats_range_field('bytes allocated', 303930948, 5)),
-                        # expected value: 215582916 (x86/Windows)
-                        #                 221667908 (x86/OS X)
-                        #                 274932264 (x86/Linux)
-                        # 2012-10-08:     303930948 (x86/Linux, new codegen)
-                        # 2012-10-29:     298921816 (x86/Windows; increased range to 5%
-      when(wordsize(64),
-          compiler_stats_range_field('bytes allocated', 658786936, 5)),
-                        # 17/11/2009:     434,845,560 (amd64/Linux)
-                        # 08/12/2009:     459,776,680 (amd64/Linux)
-                        # 17/05/2010:     519,377,728 (amd64/Linux)
-                        # 05/08/2011:     561,382,568 (amd64/OS X)
-                        # 16/07/2012:     589,168,872 (amd64/Linux)
-                        # 20/07/2012:     595,936,240 (amd64/Linux)
-                        # 23/08/2012:     606,230,880 (amd64/Linux)
-                        # 29/08/2012:     633,334,184 (amd64/Linux)
-                        #                 (^ new codegen)
-                        # 18/09/2012:     641,959,976 (amd64/Linux)
-                        # 19/10/2012:     661,832,592 (amd64/Linux)
-                        #                 (^ -fPIC turned on)
-                        # 23/10/2012:     642,594,312 (amd64/Linux)
-                        #                 (^ -fPIC turned off again)
-                        # 12/11/2012:     658,786,936 (amd64/Linux)
-                        #                 ( UNKNOWN REASON )
-                        # 17/1/13:        667,160,192 (x86_64/Linux)
-                        #                 (new demand analyser)
+     [compiler_stats_num_field('peak_megabytes_allocated', # Note [residency]
+          [(wordsize(32), 17, 15),
+             # 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)
+             # 2013-11-13 17 (x86/Windows, 64bit machine)
+           (wordsize(64), 30, 15)]),
+             #            28 (amd64/Linux)
+             #            34 (amd64/Linux)
+             # 2012-09-20 23 (amd64/Linux)
+             # 2012-10-03 25 (amd64/Linux if .hi exists)
+             # 2013-02-13 23, but unstable so increased to 10% range
+             # 2013-02-13 27, very unstable!
+             # 2013-09-11 30 (amd64/Linux)
+      compiler_stats_num_field('max_bytes_used',
+          [(platform('i386-unknown-mingw32'), 5719436, 20),
+                                 # 2010-05-17 5717704 (x86/Windows)
+                                 # 2013-02-10 5159748 (x86/Windows)
+                                 # 2013-02-10 5030080 (x86/Windows)
+                                 # 2013-11-13 7295012 (x86/Windows, 64bit machine)
+                                 # 2014-04-24 5719436 (x86/Windows, 64bit machine)
+           (wordsize(32), 5949188, 1),
+             #            6707308 (x86/OS X)
+             # 2009-12-31 6149572 (x86/Linux)
+             # 2014-01-22 6429864 (x86/Linux)
+             # 2014-06-29 5949188 (x86/Linux)
+           (wordsize(64), 11000000, 20)]),
+               # looks like the peak is around ~10M, but we're
+               # unlikely to GC exactly on the peak.
+               # varies quite a lot with CLEANUP and BINDIST,
+               # hence 10% range.
+               # See Note [residency] to get an accurate view.
+      compiler_stats_num_field('bytes allocated',
+          [(platform('i386-unknown-mingw32'), 301784492, 5),
+                                 #            215582916 (x86/Windows)
+                                 # 2012-10-29 298921816 (x86/Windows)
+                                 # 2013-02-10 310633884 (x86/Windows)
+                                 # 2013-11-13 317975916 (x86/Windows, 64bit machine)
+                                 # 2014-04-04 301784492 (x86/Windows, 64bit machine)
+           (wordsize(32), 303300692, 1),
+             #            221667908 (x86/OS X)
+             #            274932264 (x86/Linux)
+             # 2012-10-08 303930948 (x86/Linux, new codegen)
+             # 2013-02-10 322937684 (x86/OSX)
+             # 2014-01-22 316103268 (x86/Linux)
+             # 2014-06-29 303300692 (x86/Linux)
+           (wordsize(64), 660922376, 5)]),
+             # 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)
+             # 29/08/2012 633334184 (amd64/Linux) new codegen
+             # 18/09/2012 641959976 (amd64/Linux)
+             # 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
+             # 10/02/2014 660922376 (x86_64/Linux) call artiy analysis
       only_ways(['normal']),
 
       extra_hc_opts('-dcore-lint -static')
@@ -77,28 +111,45 @@ else:
    conf_3294 = skip
 
 test('T3294',
-     [when(wordsize(32),
-          compiler_stats_range_field('max_bytes_used', 17725476, 5)),
-                                   # expected value: 17725476 (x86/OS X)
-                                   #                 14593500 (Windows)
-      when(wordsize(64),
-          compiler_stats_range_field('max_bytes_used', 44894544, 15)),
-                                   # 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)
-      when(wordsize(32),
-          compiler_stats_range_field('bytes allocated', 1373514844, 5)),
-                                   # previous:     815479800  (x86/Linux)
-                                   # (^ increase due to new codegen, see #7198)
-                                   # 2012-10-08:   1373514844 (x86/Linux)
-      when(wordsize(64),
-          compiler_stats_range_field('bytes allocated', 2717327208, 5)),
-                                   # old:        1,357,587,088 (amd64/Linux)
-                                   # 29/08/2012: 2,961,778,696 (amd64/Linux)
-                                   # (^ increase due to new codegen, see #7198)
-                                   # 18/09/2012: 2,717,327,208 (amd64/Linux)
+     [
+      compiler_stats_num_field('max_bytes_used', # Note [residency]
+          [(wordsize(32), 19882188, 15),
+             #            17725476 (x86/OS X)
+             #            14593500 (Windows)
+             # 2013-02-10 20651576 (x86/Windows)
+             # 2013-02-10 20772984 (x86/OSX)
+             # 2013-11-13 24009436 (x86/Windows, 64bit machine)
+             # 2014-04-24 19882188 (x86/Windows, 64bit machine)
+           (wordsize(64), 40000000, 15)]),
+             # 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)
+             # 2014-07-14:     36670800  (amd64/Linux)
+             #  (reason unknown, setting expected value somewhere in between)
+
+      compiler_stats_num_field('bytes allocated',
+          [(wordsize(32), 1377050640, 5),
+           # previous:     815479800  (x86/Linux)
+           # (^ increase due to new codegen, see #7198)
+           # 2012-10-08:  1373514844 (x86/Linux)
+           # 2013-11-13: 1478325844  (x86/Windows, 64bit machine)
+           # 2014-01-12: 1565185140  (x86/Linux)
+           # 2013-04-04: 1377050640  (x86/Windows, 64bit machine)
+           (wordsize(64), 2705289664, 5)]),
+            # old:        1357587088 (amd64/Linux)
+            # 29/08/2012: 2961778696 (amd64/Linux)
+            # (^ increase due to new codegen, see #7198)
+            # 18/09/2012: 2717327208 (amd64/Linux)
+            # 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)
+            # 12/03/2014: 2705289664 (amd64/Linux) (more call arity improvements)
       conf_3294
       ],
      compile,
@@ -107,40 +158,50 @@ test('T3294',
 test('T4801',
      [ # expect_broken(5224),
        # temporarily unbroken (#5227)
-      compiler_stats_num_field('peak_megabytes_allocated',
-          [(platform('x86_64-apple-darwin'), 58, 1),
+      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), 49, 20)]),
+           (wordsize(64), 60, 20)]),
             # prev:       50 (amd64/Linux)
             # 19/10/2012: 64 (amd64/Linux)
-            #                (REASON UNKNOWN!)
+            #                (REASON UNKNOWN!)
             # 12/11/2012: 49 (amd64/Linux)
-            #                (REASON UNKNOWN!)
+            #                (^ REASON UNKNOWN!)
+            # 28/8/13:    60 (amd64/Linux)
+            #                (^ REASON UNKNOWN!)
 
       compiler_stats_num_field('bytes allocated',
-          [(platform('x86_64-apple-darwin'), 510938976, 5),
+          [(platform('x86_64-apple-darwin'), 464872776, 5),
                            # expected value: 510938976 (amd64/OS X):
 
-           (wordsize(32), 185669232, 10),
-        # expected value: 228286660 (x86/OS X)
-
+           (wordsize(32), 211198056, 10),
+           # prev:        185669232 (x86/OSX)
+           # 2014-01-22:  211198056 (x86/Linux)
            (wordsize(64), 392409984, 10)]),
             # prev:       360243576 (amd64/Linux)
             # 19/10/2012: 447190832 (amd64/Linux) (-fPIC turned on)
             # 19/10/2012: 392409984 (amd64/Linux) (-fPIC turned off)
 
       compiler_stats_num_field('max_bytes_used',
-          [(platform('x86_64-apple-darwin'), 21657520, 5),
-           (wordsize(32), 9651948, 5),
-      #                    expected value: x86/OS X:  9651948
-      #                    expected value:           10290952 (windows)
-           (wordsize(64), 21657520, 15)]),
+          [(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), 25002136, 10)]),
                 # 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)
        only_ways(['normal']),
        extra_hc_opts('-static')
       ],
@@ -149,34 +210,54 @@ test('T4801',
 
 test('T3064',
      [# expect_broken( 3064 ),
-      # expected value: 14 (x86/Linux 28-06-2012):
-      when(wordsize(32),
-          compiler_stats_range_field('peak_megabytes_allocated', 14, 1)),
-
-      when(wordsize(64),
-          compiler_stats_range_field('peak_megabytes_allocated', 26, 1)),
-                                     # (amd64/Linux):            18
-                                     # (amd64/Linux) 2012-02-07: 26
-
-      # expected value: 56380288 (x86/Linux) (28/6/2011)
-      #                 111189536 (x86/Windows) (30/10/12)
-      when(wordsize(32),
-          compiler_stats_range_field('bytes allocated', 111189536, 10)),
+      compiler_stats_num_field('peak_megabytes_allocated',# Note [residency]
+          [(wordsize(32), 23, 20),
+            # expected value: 14 (x86/Linux 28-06-2012):
+            # 2013-11-13:     18 (x86/Windows, 64bit machine)
+            # 2014-01-22:     23 (x86/Linux)
+           (wordsize(64), 42, 20)]),
+            # (amd64/Linux):            18
+            # (amd64/Linux) 2012-02-07: 26
+            # (amd64/Linux) 2013-02-12: 23; increased range to 10%
+            # (amd64/Linux) 2013-04-03: 26
+            # (amd64/Linux) 2013-09-11: 30; result of AMP patch
+            # Increased range to 20%.  peak-usage varies from 22 to 26,
+            #  depending on whether the old .hi file exists
+            # (amd64/Linux) 2013-09-11: 37; better arity analysis (weird)
 
+      compiler_stats_num_field('bytes allocated',
+          [(wordsize(32), 162457940, 10),
+            # 2011-06-28: 56380288  (x86/Linux)
+            # 2012-10-30: 111189536 (x86/Windows)
+            # 2013-11-13: 146626504 (x86/Windows, 64bit machine)
+            # 2014-01-22: 162457940 (x86/Linux)
+           (wordsize(64), 324022680, 5)]),
+            # (amd64/Linux) (28/06/2011):  73259544
+            # (amd64/Linux) (07/02/2013): 224798696
+            # (amd64/Linux) (02/08/2013): 236404384, increase from roles
+            # (amd64/Linux) (11/09/2013): 290165632, increase from AMP warnings
+            # (amd64/Linux) (22/11/2013): 308300448, GND via Coercible and counters for constraints solving
+                # (amd64/Linux) (02/12/2013): 329795912, Coercible refactor
+            # (amd64/Linux) (11/02/2014): 308422280, optimize Coercions in simpleOptExpr
+            # (amd64/Linux) (23/05/2014): 324022680, unknown cause
 
-      when(wordsize(64),
-          compiler_stats_range_field('bytes allocated', 224798696, 5)),
-                          # (amd64/Linux) (28/06/2011):  73259544
-                          # (amd64/Linux) (07/02/2013): 224798696
-
-      # expected value: 2247016 (x86/Linux) (28/6/2011):
-      when(wordsize(32),
-          compiler_stats_range_field('max_bytes_used', 5511604, 20)),
-
-      when(wordsize(64),
-          compiler_stats_range_field('max_bytes_used',  9819288, 5)),
-                 # (amd64/Linux, intree) (28/06/2011):  4032024
-                 # (amd64/Linux, intree) (07/02/2013):  9819288
+      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), 19821544, 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
        only_ways(['normal'])
       ],
      compile,
@@ -188,41 +269,46 @@ test('T4007',
      ['$MAKE -s --no-print-directory T4007'])
 
 test('T5030',
-     [
-      when(wordsize(32),
-          compiler_stats_range_field('bytes allocated', 259547660, 10)),
-                     # previous:    196457520
-                     # 2012-10-08:  259547660 (x86/Linux, new codegen)
+     [compiler_stats_num_field('bytes allocated',
+          [(wordsize(32), 198573456, 10),
+           # previous:    196457520
+           # 2012-10-08:  259547660 (x86/Linux, new codegen)
+           # 2013-11-21:  198573456 (x86 Windows, 64 bit machine)
+           (wordsize(64), 397672152, 10)]),
+             # Previously 530000000 (+/- 10%)
+             # 17/1/13:   602993184  (x86_64/Linux)
+             #            (new demand analyser)
+             # 2013-06-08 538467496  (x86_64/Linux)
+             # ^ reason unknown
+             # 2013-08-02 454498592  (amd64/Linux)
+             # decrease from more aggressive coercion optimisations from roles
+             # 2013-11-12 397672152  (amd64/Linux)
+             # big decrease following better CSE and arity
 
-      when(wordsize(64),
-          compiler_stats_range_field('bytes allocated', 602993184, 10)),
-            # Previously 530000000 (+/- 10%)
-            # 17/1/13:       602,993,184  (x86_64/Linux)
-            #                (new demand analyser)
-   
        only_ways(['normal'])
       ],
      compile,
      ['-fcontext-stack=300'])
 
 test('T5631',
-     [when(wordsize(32), # sample from x86/Linux
-          compiler_stats_range_field('bytes allocated', 392904228, 10)),
-      # expected value: 774,595,008 (amd64/Linux):
-      when(wordsize(64),
-          compiler_stats_range_field('bytes allocated', 774595008, 5)),
+     [compiler_stats_num_field('bytes allocated',
+          [(wordsize(32), 346389856, 10),
+        # expected value: 392904228 (x86/Linux)
+        # 2014-04-04:     346389856 (x86 Windows, 64 bit machine)
+           (wordsize(64), 690742040, 5)]),
+        # expected value: 774595008 (amd64/Linux):
+        # expected value: 735486328 (amd64/Linux) 2012/12/12:
+        # expected value: 690742040 (amd64/Linux) Call Arity improvements
        only_ways(['normal'])
       ],
      compile,
      [''])
 
 test('parsing001',
-     [# expected value: ?
-      when(wordsize(32),
-          compiler_stats_range_field('bytes allocated', 274000576, 10)),
-      # expected value: 587079016 (amd64/Linux):
-      when(wordsize(64),
-          compiler_stats_range_field('bytes allocated', 587079016, 5)),
+     [compiler_stats_num_field('bytes allocated',
+          [(wordsize(32), 274000576, 10),
+           (wordsize(64), 587079016, 5)]),
+        # expected value: 587079016 (amd64/Linux)
        only_ways(['normal']),
       ],
      compile_fail, [''])
@@ -231,82 +317,113 @@ test('parsing001',
 test('T783',
      [ only_ways(['normal']),  # no optimisation for this one
       # expected value: 175,569,928 (x86/Linux)
-      when(wordsize(32),
-          compiler_stats_range_field('bytes allocated', 226907420, 10)),
-                           # 2012-10-08: 226907420 (x86/Linux)
-      when(wordsize(64),
-          compiler_stats_range_field('bytes allocated', 640324528, 10)),
-                           # prev:       349,263,216 (amd64/Linux)
-                           # 07/08/2012: 384,479,856 (amd64/Linux)
-                           # 29/08/2012: 436,927,840 (amd64/Linux)
-                           # 12/11/2012: 640,324,528 (amd64/Linux)
-                           #   (OldCmm removed: not sure why this got worse, the
-                           #    other perf tests remained about the same)
+      compiler_stats_num_field('bytes allocated',
+          [(wordsize(32), 319179104, 5),
+            # 2012-10-08: 226907420 (x86/Linux)
+            # 2013-02-10: 329202116 (x86/Windows)
+            # 2013-02-10: 338465200 (x86/OSX)
+            # 2014-04-04: 319179104 (x86 Windows, 64 bit machine)
+           (wordsize(64), 654804144, 10)]),
+            # 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)
+            # 18/10/2013: 734038080 (amd64/Linux)
+            #   (fix for #8456)
+            # 24/10/2013: 654804144 (amd64/Linux)
+            #   (fix previous fix for #8456)
       extra_hc_opts('-static')
       ],
       compile,[''])
 
 test('T5321Fun',
      [ only_ways(['normal']),  # no optimisation for this one
-      # sample from x86/Linux
-      when(wordsize(32),
-          compiler_stats_range_field('bytes allocated', 344416344, 10)),
-                                         # prev:       300000000
-                                         # 2012-10-08: 344416344
-                                         #  (increase due to new codegen)
-      when(wordsize(64),
-          compiler_stats_range_field('bytes allocated', 713385808, 10))
-                                         # prev:       585,521,080
-                                         # 29/08/2012: 713,385,808
-                                         #  (increase due to new codegen)
+       compiler_stats_num_field('bytes allocated',
+           [(wordsize(32), 344416344, 10),
+             # prev:       300000000
+             # 2012-10-08: 344416344 x86/Linux
+             #  (increase due to new codegen)
+            (wordsize(64), 694019152, 10)])
+             # prev:       585521080
+             # 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)
       ],
       compile,[''])
 
 test('T5321FD',
      [ only_ways(['normal']),  # no optimisation for this one
-      when(wordsize(32),
-          compiler_stats_range_field('bytes allocated', 240302920, 10)),
-                                         # prev:       213380256
-                                         # 2012-10-08: 240302920 (x86/Linux)
-                                         #  (increase due to new codegen)
-      when(wordsize(64),
-          compiler_stats_range_field('bytes allocated', 492905640, 10))
-                                         # prev:       418,306,336
-                                         # 29/08/2012: 492,905,640
-                                         #  (increase due to new codegen)
+      compiler_stats_num_field('bytes allocated',
+          [(wordsize(32), 240302920, 10),
+            # prev:       213380256
+            # 2012-10-08: 240302920 (x86/Linux)
+            #  (increase due to new codegen)
+           (wordsize(64), 426960992, 10)])
+            # prev:       418306336
+            # 29/08/2012: 492905640
+            #  (increase due to new codegen)
+            # 15/05/2013: 406039584
+            #  (reason for decrease unknown)
+            # 08/06/2013: 476497048
+            #  (reason for increase unknown)
+            # 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)
       ],
       compile,[''])
 
 test('T5642',
      [ only_ways(['normal']),
-      when(wordsize(32), # sample from x86/Linux
-          compiler_stats_range_field('bytes allocated',  650000000, 10)),
-      when(wordsize(64),
-          compiler_stats_range_field('bytes allocated', 1300000000, 10))
+       compiler_stats_num_field('bytes allocated',
+           [(wordsize(32), 650000000, 10),
+                     # sample from x86/Linux
+            (wordsize(64), 1300000000, 10)])
       ],
       compile,['-O'])
 
 test('T5837',
      [ only_ways(['normal']),
-      when(wordsize(32), # sample from x86/Linux
-          compiler_stats_range_field('bytes allocated', 40000000, 10)),
-
-      # sample: 3926235424 (amd64/Linux, 15/2/2012)
-      when(wordsize(64),
-          compiler_stats_range_field('bytes allocated', 81879216, 10))
-                                          # 2012-10-02 81879216
-                                           # 2012-09-20 87254264 amd64/Linux
+      compiler_stats_num_field('bytes allocated',
+          [(wordsize(32), 45520936 , 10),
+             # 40000000 (x86/Linux)
+             # 2013-11-13: 45520936 (x86/Windows, 64bit machine)
+           (wordsize(64), 86795752, 10)])
+             # sample: 3926235424 (amd64/Linux, 15/2/2012)
+             # 2012-10-02 81879216
+             # 2012-09-20 87254264 amd64/Linux
+             # 2013-09-18 90587232 amd64/Linux
+             # 2013-11-21 86795752 amd64/Linux, GND via Coercible and counters
+             #                                  for constraints solving
       ],
-      compile_fail,['-fcontext-stack=50'])
+      compile_fail,['-ftype-function-depth=50'])
 
 test('T6048',
      [ only_ways(['optasm']),
-      when(wordsize(32), # sample from x86/Linux
-          compiler_stats_range_field('bytes allocated', 48887164, 10)),
-                                           # prev:       38000000
-                                           # 2012-10-08: 48887164 (x86/Linux)
-      when(wordsize(64),
-          compiler_stats_range_field('bytes allocated', 97247032, 10))
-                                           # 18/09/2012 97247032 amd64/Linux
+      compiler_stats_num_field('bytes allocated',
+          [(wordsize(32), 62618072, 10),
+            # prev:       38000000 (x86/Linux)
+            # 2012-10-08: 48887164 (x86/Linux)
+            # 2014-04-04: 62618072 (x86 Windows, 64 bit machine)
+           (wordsize(64), 125431448, 12)])
+             # 18/09/2012  97247032 amd64/Linux
+             # 16/01/2014 108578664 amd64/Linux (unknown, likely foldl-via-foldr)
+             # 18/01/2014  95960720 amd64/Linux Call Arity improvements
+             # 28/02/2014 105556793 amd64/Linux (unknown, tweak in base/4d9e7c9e3 resulted in change)
+             # 05/03/2014 110646312 amd64/Linux Call Arity became more elaborate
+             # 14/07/2014 125431448 amd64/Linux unknown reason. Even worse in GHC-7.8.3. *shurg*
+      ],
+      compile,[''])
+
+test('T9020',
+     [ only_ways(['optasm']),
+      compiler_stats_num_field('bytes allocated',
+          [(wordsize(32), 381360728, 10),
+           (wordsize(64), 795469104, 10)])
       ],
       compile,[''])