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collectuniformsandscalars
2018 Jun 01
2
[VPlan] about vectorization factor selection
...ted by MaxVF. For each VF, it setups unform and scalar info before building VPlan and the final best VF selection. The best VF is also selected within the VF range.
for (unsigned VF = 1; VF <= MaxVF; VF *= 2) {
// Collect Uniform and Scalar instructions after vectorization with VF.
CM.collectUniformsAndScalars(VF);
// Collect the instructions (and their associated costs) that will be more
// profitable to scalarize.
if (VF > 1)
CM.collectInstsToScalarize(VF);
}
It looks when force vectorization is not given, it is not necessary to setup uniform and scalar info for every VF. For...