Fix PR 110554: vec lowering introduces scalar signed-boolean:32 comparisons
So the problem is vector generic decided to do comparisons in signed-boolean:32
types but the rest of the middle-end was not ready for that. Since we are building
the comparison which will feed into a cond_expr here, using boolean_type_node is
better and also correct. The rest of the compiler thinks the ranges for
comparison is always [0,1] too.
Note this code does not currently lowers bigger vector sizes into smaller
vector sizes so using boolean_type_node here is better.
OK? bootstrapped and tested on x86_64-linux-gnu with no regressions.
gcc/ChangeLog:
PR middle-end/110554
* tree-vect-generic.cc (expand_vector_condition): For comparisons,
just build using boolean_type_node instead of the cond_type.
For non-comparisons/non-scalar-bitmask, build a ` != 0` gimple
that will feed into the COND_EXPR.