2 ms·

I'd expect scalar replacement of aggregates (SROA) would eliminate the use of a struct like this in some cases, but there are definitely limits, especially if n

I'd expect scalar replacement of aggregates (SROA) would eliminate the use of a struct like this in some cases, but there are definitely limits, especially if not compiling with LTO enabled, since optimizations across compilation units will be limited. Honestly doesn't seem worth the cost.

nikki93 6y ago
Using registers to pass structs is an ABI thing and doesn't need LTO, it happens during compilation (see godbolt.org links on the rest of this thread).