Commit 477b243be18181a61e25e7c0f6fda8fa71706cea
2015-08-31T10:41:16
Change the FLATTEN heuristic to "ifs with a loop with a gradient" This heuristic makes more sense than the previous "ifs with a discontinuous loop" as the reason we need to flatten is that we need gradients to be in branchless code. Change the UnrollFlatten test accordingly. Tested with: - the WebGL CTS - dev.miaumiau.cat/rayTracer "Skull Demo" - THe turbulenz engine GPU particle demo - Lots of ShaderToy Samples (inc. Volcanic, Metropolis and Hierarchical Voronoi) - Google Maps Earth mode - Lots of Chrome experiments - madebyevan.com/webgl-water BUG=524297 Change-Id: Iaa727036fffcfde3952716a1ef33b6ee0546b69d Reviewed-on: https://chromium-review.googlesource.com/296442 Reviewed-by: Jamie Madill <jmadill@chromium.org> Tested-by: Corentin Wallez <cwallez@chromium.org>