http://bugs.freedesktop.org/show_bug.cgi?id=25172
Summary: Coldest game crashes while compiling shader
Product: Mesa
Version: git
Platform: Other
URL: http://www.coldestgame.com/site/content/download
OS/Version: All
Status: NEW
Severity: normal
Priority: medium
Component: Mesa core
AssignedTo: mesa3d-dev@lists.sourceforge.net
ReportedBy: s...@whiz.se
The game Coldest crashes when the water shader is being compiled, this is a
regression from Mesa 7.6. Bisecting leads to this commit:
e4e312d493847e07ced026b93d2b588b8036ae02 is the first bad commit
commit e4e312d493847e07ced026b93d2b588b8036ae02
Author: Eric Anholt <e...@anholt.net>
Date: Sat May 16 01:47:44 2009 -0700
mesa: Add an optimization path to remove use of pointless MOVs.
GLSL code such as:
vec4 result = {0, 1, 0, 0};
gl_FragColor = result;
emits code like:
0: MOV TEMP[0], CONST[0];
1: MOV OUTPUT[1], TEMP[0];
and this replaces it with:
0: MOV TEMP[0], CONST[0];
1: MOV OUTPUT[1], CONST[0];
Even when the dead code eliminator fails to clean up a now-useless MOV
instruction (since it doesn't do live/dead ranges), this should at reduce
dependencies.
:040000 040000 f33f0fc67d7601a1605fbfeb702252208609ad04
a69c7263c3943f2ec9a074ae781d1bb68c0dd341 M src
The shaders can be viewed here:
https://www.nemebean.com/svn/coldest/shaders/
System environment:
-- chipset: G45 / ICH10R
-- system architecture: 32-bit
-- Linux distribution: Debian unstable
-- Machine or mobo model: Asus P5Q-EM
-- Display connector: DVI
-- KMS: enabled
-- xf86-video-intel: 14109abf285866ad4cd99d0cd16b0954a0a73a62
-- xserver: 1.7.0
-- mesa: e8eec9385497053a4172deeff9c0ff2726a10f3b
-- drm: 83a35b68f45cebc70152e55ed3f99db485c9a7cd
-- kernel: 2.6.32-rc7 (debian)
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