| Issue |
159309
|
| Summary |
[loopvectorize] outer loop vectorize fail
|
| Labels |
new issue
|
| Assignees |
|
| Reporter |
heiman1
|
Reproduce: https://godbolt.org/z/Edevenxo5
code:
`for (int jj = 0; jj < nnei; jj++) {
// construct the dy/dx
ll[0] = em[jj * 4 + 0];
ll[1] = em[jj * 4 + 1];
FPTYPE xx = em_x[jj];
FPTYPE grad = 0.0;
#pragma clang loop vectorize(assume_safety)
for (int kk = 0; kk < last_layer_size; kk++) {
rr[0] = dy[0 * last_layer_size + kk];
FPTYPE a0 = table[jj * last_layer_size * 6 + 6 * kk + 0];
grad += a0 * rr[0] * (nnei - jj);
for (int jj2 = 0; jj2 < nnei-jj; jj2++) {
dtwo[(jj2+jj) * last_layer_size + kk] += xx;
}
}
dem[jj * 4 + 0] += grad;
}`
<img width="868" height="202" alt="Image" src="" />
Is there a good solution to enable outer layer vectorization?
![]()
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