Remove redundant condition in tree-vect-loop.cc
This removes a pointless `&& 1` condition in the `vectorizable_reduction` function, cleaning up the code.
A previous change replaced a condition with && 1 in the vectorizable_reduction function, which served no purpose. This commit removes the redundant && 1, simplifying the code and improving readability. This has no functional impact.
In Details
The vectorizable_reduction function in tree-vect-loop.cc is part of the loop vectorization pass. The commit removes a && 1 which was introduced by r16-476. The condition did not change the behavior of the code, so removing it only improves readability.
For Context
Loop vectorization is a compiler optimization that transforms loops to process multiple data elements simultaneously, using vector instructions. This can significantly improve performance. This change removes an unnecessary condition in the loop vectorization code, making it cleaner but without changing its behavior.