[Nouveau] [Bug 91056] The Bard's Tale (2005, native) has rendering issues

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=91056

--- Comment #6 from Ilia Mirkin <imirkin at alum.mit.edu> ---
So we try to do:

  4: ld u32 $r2 c0[$a1+0x0] (8)
  5: sub f32 $r2 $r2 c0[$a0+0x0] (8)
  6: mad f32 $r2 a[0x18] $r2 c0[$a0+0x0] (8)
  7: ld u32 $r3 c0[$a1+0x4] (8)
  8: sub f32 $r3 $r3 c0[$a0+0x4] (8)
  9: mad f32 $r3 a[0x18] $r3 c0[$a0+0x4] (8)

but it comes out as

00000020: 18000009 2400c780     ld $r2 b32 c0[$a2]
00000028: b5000409 08000780     add rn f32 $r2 $r2 neg c0[$a1]
00000030: e1020c09 00200780     add f32 $r2 (mul a[0x18] $r2) c0[0x0]
00000038: 1800020d 2400c780     ld $r3 b32 c0[$a2+0x4]
00000040: b500060d 08004780     add rn f32 $r3 $r3 neg c0[$a1+0x4]
00000048: e1030c0d 00204780     add f32 $r3 (mul a[0x18] $r3) c0[0x4]

oops. Either we can't propagate into the mad, or there's an indirect bit
somewhere in there.

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