Hi Neil,
it looks like this bug was introduced by this commit:
https://reviews.llvm.org/rGa36bc873a269dca0c5399d72bfdd42d3ddc72671
I'm to report this and revert it if no fix in short time.
Thanks,
Anton
вт, 31 авг. 2021 г. в 11:20, Neil Henning via llvm-dev <
llvm-dev at lists.llvm.org>:
> Hey list,
>
> I don't have bugzilla (reasons - incidentally is there anyone working
on a
> more sane way to report bugs yet?).
>
> Between LLVM 13 rc2 and trunk I've got some new fun fail in the SLP
> vectorizer. I'll attach the repro below (I could repro it with opt
> --slp-vectorizer test.ll) - fails with:
>
> Assertion failed: !isa<PHINode>(I) &&
!isVectorLikeInstWithConstOps(I) &&
> "phi nodes/insertelements/extractelements/extractvalues don't need
to " "be
> scheduled", file ..\lib\Transforms\Vectorize\SLPVectorizer.cpp, line
6096
>
> Anyone know what has changed in the short time from 13 -> trunk
that'd
> cause this?
>
> define void @test([4 x float]* nocapture %o, [2 x float]* nocapture
> nonnull readonly dereferenceable(8) %a, [2 x float]* nocapture nonnull
> readonly dereferenceable(8) %b, i32 signext %component) {
> entry:
> %0 = bitcast [2 x float]* %a to <2 x float>*
> %1 = load <2 x float>, <2 x float>* %0, align 1
> %2 = bitcast [2 x float]* %b to <2 x float>*
> %3 = load <2 x float>, <2 x float>* %2, align 1
> %4 = trunc i32 %component to i8
> %5 = shufflevector <2 x float> %1, <2 x float> %3, <8 x
i32> <i32 0, i32
> 1, i32 undef, i32 undef, i32 2, i32 3, i32 undef, i32 undef>
> %6 = extractelement <8 x float> %5, i8 %4
> %7 = insertelement <4 x float> undef, float %6, i64 0
> %8 = extractelement <2 x float> %3, i32 1
> %9 = insertelement <4 x float> %7, float %8, i64 1
> %10 = extractelement <2 x float> %1, i32 1
> %11 = insertelement <4 x float> %9, float %10, i64 2
> %12 = insertelement <4 x float> %11, float %6, i64 3
> %13 = bitcast [4 x float]* %o to <4 x float>*
> store <4 x float> %12, <4 x float>* %13, align 1
> ret void
> }
>
> Thanks for any help,
> -Neil.
>
> --
> Neil Henning
> Senior Software Engineer Compiler
> unity.com
> _______________________________________________
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> llvm-dev at lists.llvm.org
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>
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