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| author | Andreas Klebinger <klebinger.andreas@gmx.at> | 2022-04-07 17:21:47 +0200 |
|---|---|---|
| committer | Andreas Klebinger <klebinger.andreas@gmx.at> | 2022-08-05 18:57:28 +0200 |
| commit | a37161cf4c6ab46fe64b2d1ab2863d4f143601eb (patch) | |
| tree | 2cc0ed02ddda15539f9389ed027d45c7bd4dacbf /compiler/GHC/Driver/Flags.hs | |
| parent | f0aec520ed7026eb79ec2279fe1055f1806a9a21 (diff) | |
| download | haskell-wip/andreask/late_cc.tar.gz | |
Change `-fprof-late` to insert cost centres after unfolding creation.wip/andreask/late_cc
The former behaviour of adding cost centres after optimization but
before unfoldings are created is not available via the flag
`prof-late-inline` instead.
I also reduced the overhead of -fprof-late* by pushing the cost centres
into lambdas. This means the cost centres will only account for
execution of functions and not their partial application.
Further I made LATE_CC cost centres it's own CC flavour so they now
won't clash with user defined ones if a user uses the same string for
a custom scc.
LateCC: Don't put cost centres inside constructor workers.
With -fprof-late they are rarely useful as the worker is usually
inlined. Even if the worker is not inlined or we use -fprof-late-linline
they are generally not helpful but bloat compile and run time
significantly. So we just don't add sccs inside constructor workers.
-------------------------
Metric Decrease:
T13701
-------------------------
Diffstat (limited to 'compiler/GHC/Driver/Flags.hs')
| -rw-r--r-- | compiler/GHC/Driver/Flags.hs | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/compiler/GHC/Driver/Flags.hs b/compiler/GHC/Driver/Flags.hs index a4e5827bc6..fd23d2e81e 100644 --- a/compiler/GHC/Driver/Flags.hs +++ b/compiler/GHC/Driver/Flags.hs @@ -96,6 +96,7 @@ data DumpFlag | Opt_D_dump_simpl_iterations | Opt_D_dump_spec | Opt_D_dump_prep + | Opt_D_dump_late_cc | Opt_D_dump_stg_from_core -- ^ Initial STG (CoreToStg output) | Opt_D_dump_stg_unarised -- ^ STG after unarise | Opt_D_dump_stg_cg -- ^ STG (after stg2stg) @@ -303,6 +304,7 @@ data GeneralFlag -- profiling opts | Opt_AutoSccsOnIndividualCafs | Opt_ProfCountEntries + | Opt_ProfLateInlineCcs | Opt_ProfLateCcs | Opt_ProfManualCcs -- ^ Ignore manual SCC annotations |