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authorEric Anholt <[email protected]>2009-05-16 01:47:44 -0700
committerEric Anholt <[email protected]>2009-11-06 13:16:49 -0800
commite4e312d493847e07ced026b93d2b588b8036ae02 (patch)
tree818a1506a6d37fb672b2f16f18dfb27508d543f2 /src/mesa/shader/prog_noise.h
parentee0a9e6e10060287747d9dd4afead3cbbb168e09 (diff)
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.
Diffstat (limited to 'src/mesa/shader/prog_noise.h')
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