[PATCH] D82227: SLP: honor requested max vector size merging PHIs

[Stanislav Mekhanoshin via Phabricator via llvm-commits]

rampitec added a comment.

In D82227#2105469 <https://reviews.llvm.org/D82227#2105469>, @ABataev wrote:

> Why it is required?


The whole pass only creates vectors up to the size of a vector register provided by a target, this is simply an omission in this place not to check it.

On practice the testcase is reduced from a real app where it has created two <32 x float> vectors and RA run out of registers. Both have to be alive at the same loop and we did not have sufficient number of registers.


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