...better (add dataflow analysis to eliminate unnecessary allocations, etc.), or we can decide we want...

Out of curiosity, are you linking in phobos statically or dynamically?  You can force either...

...we got to embrace the GC, optimize allocations via escape analysis, and so on (a...

...likely to uncover opportunities to revert GC allocations. For instance:

```d
auto foo() {
  return new...

Also it's worth noting you can actually make some of these range patterns nogc...

Ideally the dmd frontend would have a nice reliable IR to do this analysis properly...

...a language-level guarantee that no GC allocations will happen in that function. This guarantee...

(LDC dev) I doubt this will be able to be fixed. @nogc is a frontend...

...LDC wouldn't have the need for a custom pass to revert the GC allocations.

...is actually unable to eliminate all GC allocations in the @nogc code. Maybe I can...