inline-asmThe loop body contains inline assembly

Reported by --explain after a verdict.

mettle explain inline-asm

The compiler treats an asm block as opaque. It cannot know which registers or memory the block touches, so it cannot prove the lanes are independent.

Fix: move the asm out of the loop, or accept the scalar loop. Hand-written asm in a hot loop is usually already the vector code you wanted.

Related

• call-in-bodyThe loop body calls a function
• extern-call-in-bodyThe loop body calls an external function
• indirect-callThe loop body calls through a function pointer
• alloc-in-bodyThe loop body allocates
• control-flowThe loop body branches
• early-exitThe loop can leave before its trip count
• int16-elements16-bit integer elements have no kernel
• int64-elements64-bit integer elements have no kernel