[llvm] [VPlan] Move FOR splice cost into VPInstruction::FirstOrderRecurrenceSplice (PR #129645)

[Mel Chen via llvm-commits]

Mel-Chen wrote:

>   %arrayidx = getelementptr inbounds nuw i64, ptr %A, i64 %indvars
>   %0 = load i64, ptr %arrayidx, align 4
>   %add = add nsw i64 %for1, %0
>   %arrayidx2 = getelementptr inbounds nuw i64, ptr %B, i64 %indvars
>   store i64 %add, ptr %arrayidx2, align 4

I guess the issue might be due to load/store alignment. Try changing it to align 8 and try again.




https://github.com/llvm/llvm-project/pull/129645