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authorBrian Paul <brianp@vmware.com>2009-01-06 17:24:23 -0700
committerBrian Paul <brianp@vmware.com>2009-01-06 17:24:23 -0700
commit1fa978c8911d00e7cac0a114110e98ebdbe4d57d (patch)
tree64ed642fe02792f27e43eaaf09b0138f9a048a82 /Makefile.DJ
parent338ae34d227fce8b6f358ca90d383d0cfb87c868 (diff)
glsl: implement loop unrolling for simple 'for' loops
Loops such as this will be unrolled: for (i = 0; i < 4; ++i) { body; } where 'body' isn't too large. This also helps to fix the issue reported in bug #19190. The problem there is indexing vector types with a variable index. For example: vec4 v; v[2] = 1.0; // equivalent to v.z = 1.0 v[i] = 2.0; // variable index into vector!! Since the for-i loop can be unrolled, we can avoid the problems associated with variable indexing into a vector (at least in this case).
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