[llvm-dev] LLVM opt unable to vectorize PolyBench code

[hameeza ahmed via llvm-dev]

Hello,

I m unable to vectorize following kernel by opt tool;

for (i = 0; i < _PB_NI; i++)
    for (j = 0; j < _PB_NJ; j++)
      {
    tmp[i][j] = 0;
    for (k = 0; k < _PB_NK; ++k)
      tmp[i][j] += alpha * A[i][k] * B[k][j];
      }
  for (i = 0; i < _PB_NI; i++)
    for (j = 0; j < _PB_NL; j++)
      {
    D[i][j] *= beta;
    for (k = 0; k < _PB_NJ; ++k)
      D[i][j] += tmp[i][k] * C[k][j];
      }

i m using following command
$opt  -S -O3 -force-vector-width=64 -pass-remarks=loop-vectorize
-enable-load-pre=0 2mm.ll -o 2mm-64_o3.ll

what is wrong here? what should i do?

Please help..
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