[PATCH] D140580: [SLP]Do not emit many extractelements, reuse the single one emitted.

Tue Jan 3 05:30:41 PST 2023

uabelho added a comment.

In D140580#4022871 <https://reviews.llvm.org/D140580#4022871>, @ABataev wrote:

> In D140580#4022462 <https://reviews.llvm.org/D140580#4022462>, @uabelho wrote:
>
>> We also see crashes with this. Reproduceable with
>>
>>   opt -passes="slp-vectorizer" -mtriple=aarch64--linux-gnu bbi-77341.ll -o /dev/null
>>
>> F26081559: bbi-77341.ll <https://reviews.llvm.org/F26081559>
>
> How did you get this code? What toolchain did you use? Why those constant insructions were not folded away by Instcombiner?

Fuzz testing. Random generated C program with random pass pipeline.

Repository:
  rG LLVM Github Monorepo

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https://reviews.llvm.org/D140580