[GHC] #10878: Near doubling of generated code size for compiler/cmm/PprC.hs with commit 5d57087e31

[GHC]

#10878: Near doubling of generated code size for compiler/cmm/PprC.hs with commit
5d57087e31
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        Reporter:  erikd             |                Owner:
            Type:  bug               |               Status:  new
        Priority:  normal            |            Milestone:  8.0.1
       Component:  Compiler          |              Version:  7.11
      Resolution:                    |             Keywords:
Operating System:  Unknown/Multiple  |         Architecture:
                                     |  Unknown/Multiple
 Type of failure:  Other             |            Test Case:
      Blocked By:                    |             Blocking:
 Related Tickets:                    |  Differential Rev(s):
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Comment (by thomie):

 I built various trees on Windows 64-bit using BuildFlavour=perf:
 * current HEAD (78053f449d47a90c977ec3a893524f2cdb5d33f9) with the change
 to compiler/utils/Pretty.hs reverted
 (5d57087e314bd484dbe14958f9b422be3ac6641a)
 * current HEAD + NOINLINE pragmas on above_ and beside_
 * current HEAD

 || measurement || HEAD+revert || HEAD+INLINE || HEAD ||
 || du -bhs compiler/stage2/build/PprCmm.o || 106K || 132K || 203K ||
 || du -bhs compilre/stage2/build/CLabel.o || 838K || 336K || 371K ||
 || du -bhs compiler/stage2/build || 503M || 517M || 533M ||

 So I confirm your findings: PprCmm.o has doubled in size, and adding
 NOLINE pragmas brings it back to 20-30%. I compared some other .o files,
 and found to my surprise that CLabel.o has however more than halved in
 size! But since the total size of the stage2/build directory has
 increased, we should probably do something.

 I don't understand yet why adding NOINLINE on above_ and beside_ doesn't
 bring the sizes back to the baseline.

--
Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/10878#comment:6>
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