[Nouveau] [Bug 91124] Civilization V (in Wine) has rendering issues: text missing, menu bar corrupted

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=91124

--- Comment #1 from Ilia Mirkin <imirkin at alum.mit.edu> ---
Created attachment 116817
  --> https://bugs.freedesktop.org/attachment.cgi?id=116817&action=edit
shader that triggers bug

The attached shader appears to trigger an issue in the FlatteningPass.
Specifically the resulting code looks like

00000198: a0036003 00000000     joinat 0x1b0
000001a0: b00005fd 600187c8     set $c0 # ge f32 $r2 $r0
000001a8: 1000020d 0403c100     (e $c0) mov b32 $r3 $r1
000001b0: 10000801 2400c780   B ld $r0 b32 c0[0x10]

That joinat shouldn't be there at all. This is a bit tricky, since pre-RA, the
code looks like

 60: joinat BB:5 (0)
 61: set u8 %c259 ge f32 %r215 %r255 (0)
 62: eq %c259 bra BB:4 (0)
BB:3 (1 instructions) - idom = BB:12, df = { BB:5 }
 -> BB:5 (forward)
 63: bra BB:5 (0)
BB:4 (1 instructions) - idom = BB:12, df = { BB:5 }
 -> BB:5 (forward)
 64: bra BB:5 (0)
BB:5 (14 instructions) - idom = BB:12, df = { BB:10 }
 -> BB:7 (tree)
 -> BB:6 (tree)
 65: phi u32 %r261 %r254 %r252 (0)
 66: join (0)

and the (e $c0) mov ... is actually generated from the phi node (since it
creates constraint moves into BB:3/4. Post-RA but pre-FlatteningPass, this
looks like

 64: joinat BB:5 (0)
 65: set u8 $c0 ge f32 $r2 $r0 (0)
 66: eq $c0 bra BB:4 (0)
BB:3 (1 instructions) - idom = BB:12, df = { BB:5 }
 -> BB:5 (forward)
 67: bra BB:5 (0)
BB:4 (2 instructions) - idom = BB:12, df = { BB:5 }
 -> BB:5 (forward)
 68: mov u32 $r3 $r1 (0)
 69: bra BB:5 (0)
BB:5 (13 instructions) - idom = BB:12, df = { BB:10 }
 -> BB:7 (tree)
 -> BB:6 (tree)
 70: join (0)

Will have to understand the FlatteningPass better before I can figure out
what's wrong though.

-- 
You are receiving this mail because:
You are the QA Contact for the bug.
You are the assignee for the bug.
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.freedesktop.org/archives/nouveau/attachments/20150630/9180ffa4/attachment.html>