Bugs item #1032241, was opened at 2004-09-22 01:30
Message generated for change (Comment added) made by wthaller
You can respond by visiting:
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>Category: Compiler (NCG)
Group: 6.2.1
>Status: Closed
>Resolution: Wont Fix
Priority: 5
Submitted By: Mark Tullsen (mtullsen)
>Assigned to: Wolfgang Thaller (wthaller)
Summary: power-pc code generation error
Initial Comment:
The following code (in Test.hs, attached):
module Test where
data T = C1
| C2
...
| C200
results in an assembler error when compiling natively (for the
PPC):
$ ghc -c Test.hs
/tmp/ghc8899.s:6652:Fixup of 45900 too large for field width of
16 bits
/tmp/ghc8899.s:6650:Fixup of 45908 too large for field width of
16 bits
I don't have a problem when I compile via C:
$ ghc -fvia-C -c Test.hs
$
Environment:
ghc 6.2.1
Mac OS X
PPC
----------------------------------------------------------------------
>Comment By: Wolfgang Thaller (wthaller)
Date: 2004-10-01 04:52
Message:
Logged In: YES
user_id=566359
Thanks for the report.
Yes, I know that this can happen. Your large datatype results in more
than 32K of code being generated, which the PowerPC's conditional
branches can't handle. GHC currently doesn't do anything to work around
this.
GHC 6.4 will feature a completely rewritten backend, which, while not
really fixing this issue, will make it much less likely to happen in
practice. Therefore, I am closing this bug as "Won't Fix".
For now, I recommend that you just add {-# OPTIONS -fvia-C #-} to the
top of your source file; after GHC 6.4 is released, you'll be able to
remove this.
----------------------------------------------------------------------
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