[GHC] #14815: -XStrict prevents code inlining.

[GHC]

#14815: -XStrict prevents code inlining.
-------------------------------------+-------------------------------------
        Reporter:  danilo2           |                Owner:  (none)
            Type:  bug               |               Status:  new
        Priority:  high              |            Milestone:
       Component:  Compiler          |              Version:  8.2.2
      Resolution:                    |             Keywords:
Operating System:  Unknown/Multiple  |         Architecture:
                                     |  Unknown/Multiple
 Type of failure:  None/Unknown      |            Test Case:
      Blocked By:                    |             Blocking:
 Related Tickets:                    |  Differential Rev(s):
       Wiki Page:                    |
-------------------------------------+-------------------------------------

Comment (by osa1):

 I'm not sure how to write a test for this. The problem is in GHC 8.2 for
 the `primitive` function shown in the bug report we generate a desugared
 function with `RHS size: {terms: 16, types: 52, coercions: 15, joins:
 0/1}` without `-XStrict`, and with `-XStrict` it becomes `-- RHS size:
 {terms: 16, types: 58, coercions: 15, joins: 1/2}` even though there
 should be no difference (as is already the case with GHC 8.4 and GHC
 HEAD). It's hard to write a program that generates different outputs based
 on the term size, so I guess I have to compare desugarer outputs with and
 without `-XStrict`, but even then I get different variables generated in
 each run, so I need equality modulo renaming.. bgamari, do you know how to
 implement such a test? Do we have any similar tests in the test suite
 already?

-- 
Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/14815#comment:5>
GHC <http://www.haskell.org/ghc/>
The Glasgow Haskell Compiler