[PATCH] D78847: [LV] Fix recording of BranchTakenCount for FoldTail

[Ayal Zaks via Phabricator via llvm-commits]

Ayal added a comment.

In D78847#2028853 <https://reviews.llvm.org/D78847#2028853>, @anhtuyen wrote:

>


[snip]

> Below is an example to demonstrate that **setting VTCMO to TCMO when State->VF == 1** will not help in the case of a loop of VF 1 having a vector loop-bound.

[snip]

>   In this case, the operand[0] (which is %vec.iv) has type <1 x i64>. The loop-bound, however, will get the type as **i64** instead of the expected **<i64 2305843009213693951>** .

Right, VPWidenCanonicalIVRecipe::execute() also needs to treat VF==1 differently.


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https://reviews.llvm.org/D78847