[Bug 103142] R600g+sb: optimizer apparently stuck in an endless loop

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=103142

--- Comment #7 from Gert Wollny <gw.fossdev at gmail.com> ---
It seems sb is trying to create an operation that tries to use two distinct
relative indices within the same instruction, this is forbidden and the
scheduler gets stuck. 

from the post scheduler dump: 

 # 0.y => t175||FP at R0.y
  # 0.z => t194||FP at R0.z
  new current_AR assigned: R13.x.235 at R0.w
  current_AR is R13.x.235 at R0.w  trying to use R15.x.126 at R1.x
  current_AR is R13.x.235 at R0.w  trying to use R15.x.126 at R1.x
!!!!!! interf slot: 0  : 
  ADD     t80 at R1.x,    A26.y[R13.x.235 at R0.w]_608F at R5.y,  \
                       A26.y[R15.x.126 at R1.x]_609F at R5.y

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