array_reverse fails with clang >=6 + AVX + -O2
Submitted by Gael Guennebaud @ggael
Assigned to Nobody
Link to original bugzilla bug (#1684)
Version: 3.4 (development)
Description
Since the following changeset:
the unit test array_reverse_3 (and 4) fail at runtime line 113 with clang 6 and 7 with -O2 (or -O3) and AVX (or above).
This is the call to rowwise().reverseInPlace() which is failing (line 112).
This error is very suspicious because the above changeset is only adding a few "inline" and it is impossible to reproduce it on a standalone test. For instance, only one of following changes is enough to silent the issue:
- add exit(0); line 114 of array_reverse.cpp
- make reverseInPlace() no-inline