[PATCH] D57059: [SLP] Initial support for the vectorization of the non-power-of-2 vectors.

[Dinar Temirbulatov via Phabricator via llvm-commits]

dtemirbulatov added a comment.

While reviewing the latest update, I think I spotted SLP compile-time failure in SingleSource/Benchmarks/Misc/oourafft.c, here is the reduced testcase to reporduce:
source_filename = "/home/dtemirbulatov/llvm/test-suite/SingleSource/Benchmarks/Misc/oourafft.c"
target datalayout = "e-m:e-p270:32:32-p271:32:32-p272:64:64-i64:64-f80:128-n8:16:32:64-S128"
target triple = "x86_64-unknown-linux-gnu"

define dso_local fastcc void @cft1st(double* %a) unnamed_addr #0 {
entry:

  %0 = or i64 16, 2
  %arrayidx107 = getelementptr inbounds double, double* %a, i64 %0
  %1 = or i64 16, 3
  %arrayidx114 = getelementptr inbounds double, double* %a, i64 %1
  %2 = or i64 16, 4
  %arrayidx131 = getelementptr inbounds double, double* %a, i64 %2
  %3 = or i64 16, 6
  %arrayidx134 = getelementptr inbounds double, double* %a, i64 %3
  %4 = load double, double* %arrayidx134, align 8
  %5 = or i64 16, 5
  %arrayidx138 = getelementptr inbounds double, double* %a, i64 %5
  %6 = or i64 16, 7
  %arrayidx141 = getelementptr inbounds double, double* %a, i64 %6
  %7 = load double, double* %arrayidx141, align 8
  %sub149 = fsub double undef, %4
  %sub156 = fsub double undef, %7
  store double undef, double* %arrayidx131, align 8
  store double undef, double* %arrayidx138, align 8
  %sub178 = fsub double undef, %sub156
  %add179 = fadd double undef, %sub149
  %mul180 = fmul double undef, %sub178
  %sub182 = fsub double %mul180, undef
  store double %sub182, double* %arrayidx107, align 8
  %mul186 = fmul double undef, %add179
  %add188 = fadd double %mul186, undef
  store double %add188, double* %arrayidx114, align 8
  unreachable

}

attributes #0 = { "target-features"="+avx,+avx2,+bmi,+bmi2,+cx16,+cx8,+f16c,+fma,+fsgsbase,+fxsr,+invpcid,+lzcnt,+mmx,+movbe,+pclmul,+popcnt,+rdrnd,+sahf,+sse,+sse2,+sse3,+sse4.1,+sse4.2,+ssse3,+x87,+xsave,+xsaveopt" }

!llvm.ident = !{!0}

!0 = !{!"clang version 12.0.0 (https://github.com/llvm/llvm-project.git aaa925795f93c389a96ee01bab73bc2b6b771cbb <https://reviews.llvm.org/rGaaa925795f93c389a96ee01bab73bc2b6b771cbb>)"}


Repository:
  rG LLVM Github Monorepo

CHANGES SINCE LAST ACTION
  https://reviews.llvm.org/D57059/new/

https://reviews.llvm.org/D57059