if-convertedA branch became branchless arithmetic

Reported by --explain after a verdict.

mettle explain if-converted

A short if in the body was rewritten as a select or a mask, so both sides are computed and one is chosen. That removes a mispredictable branch, and it is what lets a loop with a small conditional vectorize.

Related

• vectorizedThe loop became a SIMD kernel
• vectorized-innerThe inner loop of a nest became a kernel
• outer-of-nestThe outer loop of a nest, reported for context
• eliminatedThe loop was removed
• inlinedThe call was inlined
• unrolledThe loop was unrolled
• hoistedA call was lifted out of the loop
• prefetchedA prefetch was inserted