#15445: SPECIALIZE one of two identical functions does not fire well
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Reporter: nobrakal | Owner: (none)
Type: bug | Status: new
Priority: normal | Milestone: 8.6.1
Component: Compiler | Version: 8.4.3
Resolution: | Keywords:
Operating System: Linux | Architecture: x86_64
| (amd64)
Type of failure: None/Unknown | Test Case:
| simplCore/should_compile/T15445
Blocked By: | Blocking:
Related Tickets: | Differential Rev(s):
Wiki Page: |
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Comment (by simonpj):
Ben had to revert this patch
{{{
Revert "Don't inline functions with RULES too early"
author Ben Gamari
Wed, 1 Aug 2018 11:42:19 +0100 (06:42 -0400)
committer Ben Gamari
Wed, 1 Aug 2018 11:54:23 +0100 (06:54 -0400)
This commit causes significant performance regressions:
```
bytes allocated value is too high:
Expected T9872d(normal) bytes allocated: 578498120 +/-5%
Lower bound T9872d(normal) bytes allocated: 549573214
Upper bound T9872d(normal) bytes allocated: 607423026
Actual T9872d(normal) bytes allocated: 677179968
Deviation T9872d(normal) bytes allocated: 17.1 %
bytes allocated value is too high:
Expected T9872c(normal) bytes allocated: 3096670112 +/-5%
Lower bound T9872c(normal) bytes allocated: 2941836606
Upper bound T9872c(normal) bytes allocated: 3251503618
Actual T9872c(normal) bytes allocated: 3601872536
Deviation T9872c(normal) bytes allocated: 16.3 %
bytes allocated value is too high:
Expected T9872b(normal) bytes allocated: 3730686224 +/-5%
Lower bound T9872b(normal) bytes allocated: 3544151912
Upper bound T9872b(normal) bytes allocated: 3917220536
Actual T9872b(normal) bytes allocated: 4374298272
Deviation T9872b(normal) bytes allocated: 17.3 %
bytes allocated value is too high:
Expected T9872a(normal) bytes allocated: 2729927408 +/-5%
Lower bound T9872a(normal) bytes allocated: 2593431037
Upper bound T9872a(normal) bytes allocated: 2866423779
Actual T9872a(normal) bytes allocated: 3225788896
Deviation T9872a(normal) bytes allocated: 18.2 %
```
It's not clear that this was intentional so I'm going to revert for now.
This reverts commit 2110738b280543698407924a16ac92b6d804dc36.
}}}
--
Ticket URL: http://ghc.haskell.org/trac/ghc/ticket/15445#comment:6
GHC http://www.haskell.org/ghc/
The Glasgow Haskell Compiler
