[GHC] #7830: Error: operand out of range

[GHC]

#7830: Error: operand out of range
-------------------------+--------------------------------------------------
    Reporter:  erikd     |       Owner:                       
        Type:  bug       |      Status:  new                  
    Priority:  high      |   Milestone:  7.8.1                
   Component:  Compiler  |     Version:  7.7                  
    Keywords:            |          Os:  Linux                
Architecture:  powerpc   |     Failure:  Installing GHC failed
  Difficulty:  Unknown   |    Testcase:                       
   Blockedby:            |    Blocking:                       
     Related:            |  
-------------------------+--------------------------------------------------

Comment(by erikd):

 I have a rough hack work around for this but its not suitable for
 commiting to git yet. Basically in the pretty-printer (it really belongs
 in the codeGen and will be moved there) I rewrite:

 {{{
     lwz     30, .label-(1b)(31)
 }}}

 to

 {{{
     addis   30, 31, (.label-(1b))@ha
     lwz     30, (.label-(1b))@l(30)
 }}}

 This compiles but I then get an illegal instruction error in function
 `cr_str`. The call stack looks like this:

 {{{
 #0  0x0f3f3e24 in cr_str () from /home/erikd/Git/ghc-
 upstream/rts/dist/build/libHSrts-ghc7.7.20130623.so
 #1  0x0f3df490 in stg_catchzh () from /home/erikd/Git/ghc-
 upstream/rts/dist/build/libHSrts-ghc7.7.20130623.so
 #2  0x0f3cd01c in scheduleWaitThread () from /home/erikd/Git/ghc-
 upstream/rts/dist/build/libHSrts-ghc7.7.20130623.so
 #3  0x0f3c73dc in rts_evalLazyIO () from /home/erikd/Git/ghc-
 upstream/rts/dist/build/libHSrts-ghc7.7.20130623.so
 #4  0x0f3c9300 in hs_main () from /home/erikd/Git/ghc-
 upstream/rts/dist/build/libHSrts-ghc7.7.20130623.so
 #5  0x10006ae4 in main ()
 }}}

 and the disassembled code looks like:

 {{{
    0x0f3f3dec:  rlwimi  r1,r2,10,0,16
    0x0f3f3df0:  xoris   r2,r27,27237
    0x0f3f3df4:  ori     r20,r27,8293
    0x0f3f3df8:  xoris   r20,r19,25970
    0x0f3f3dfc:  oris    r4,r11,8448
    0x0f3f3e00:  .long 0xfffeae2c
    0x0f3f3e04:  .long 0xfffeae2c
    0x0f3f3e08:  .long 0xfffeae2c
    0x0f3f3e0c:  .long 0xfffeae2c
    0x0f3f3e10:  .long 0xfffeae2c
    0x0f3f3e14:  .long 0xfffeae2c
    0x0f3f3e18:  .long 0xfffeae2c
    0x0f3f3e1c:  .long 0xfffeae2c
    0x0f3f3e20:  .long 0xfffeae2c
 => 0x0f3f3e24:  .long 0xfffeae20
    0x0f3f3e28:  .long 0xfffeae20
 }}}

 with the illegal instruction indicated.

-- 
Ticket URL: <http://hackage.haskell.org/trac/ghc/ticket/7830#comment:8>
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