tree d1babc0a7da5addcfea47fbb0bd2dcbf3ad0687d
parent 5cf1921e6d7ba36e6e882094d3280e3cd363df61
author Zack Rusin <zackr@vmware.com> 1277508669 -0400
committer Zack Rusin <zackr@vmware.com> 1277508807 -0400

draw: limit the number of vertex shader variants kept around

we used to create and cache unltimited number of variant, this
change limits the number of variants kept around to a fixed number.
the change is based on a similar patch by Roland for llvmpipe fragment
shaders.