================
@@ -8520,7 +8561,29 @@
LoopVectorizationPlanner::tryToBuildVPlanWithVPRecipes(VFRange &Range) {
// When not folding the tail, we know that the induction increment will not
// overflow.
bool HasNUW = Style == TailFoldingStyle::None;
- addCanonicalIVRecipes(*Plan, Legal->getWidestInductionType(), HasNUW, DL);
+
+ VPValue *AliasMask = nullptr;
----------------
SamTebbs33 wrote:
Currently the mask is only generated when tail predication is enabled, in which
case it perhaps could be done with a transform since all the vector loads and
stores will be masked anyway. However the goal is to generate the mask even
when tail predication is disabled, to capture more cases, and so the transform
would have to handle swapping the non-masked loads and stores to masked
variants, which I don't think is best done with a transform since the original
VPlan does a good job of that anyway.
I'd also argue that it's a good idea to get the masking as we want it to be
from the beginning rather than setting up an active lane mask and building on
top of it later on.
https://github.com/llvm/llvm-project/pull/100579
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