This is almost useless for dynamic runtimes, as they need to inline their own calls in their own calling convention, not calls in the C calling convention in ll

This is almost useless for dynamic runtimes, as they need to inline their own calls in their own calling convention, not calls in the C calling convention in llvm bitcode format. For the C calling convention -O3 is good enough. With this you need to explicitly mark them, similar to [[always_inline]], just in a separate text file. This hardcodes r14, so it would be only useful for x86_64. Also inlining just enables further optimizations, previously missed. something like qbe is much more interesting.