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authorPaul Berry <[email protected]>2013-11-28 14:40:19 -0800
committerPaul Berry <[email protected]>2013-12-09 10:54:56 -0800
commitffc29120c402551fe9a7fa36e8ee5476bad27738 (patch)
tree5ec4ccaa2c464f9f60c938eeacdaf70b7c6a61d4 /src/glsl/hir_field_selection.cpp
parent4bbf6d1d2b20bccd784a326f33bdb860032db361 (diff)
glsl/loops: Move some analysis from loop_controls to loop_analysis.
Previously, the sole responsibility of loop_analysis was to find all the variables referenced in the loop that are either loop constant or induction variables, and find all of the simple if statements that might terminate the loop. The remainder of the analysis necessary to determine how many times a loop executed was performed by loop_controls. This patch makes loop_analysis also responsible for determining the number of iterations after which each loop terminator will terminate the loop, and for figuring out which terminator will terminate the loop first (I'm calling this the "limiting terminator"). This will allow loop unrolling to make use of information that was previously only visible from loop_controls, namely the identity of the limiting terminator. Reviewed-by: Ian Romanick <[email protected]>
Diffstat (limited to 'src/glsl/hir_field_selection.cpp')
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