> On Dec 17, 2015, at 3:34 PM, Joe Groff via swift-dev <swift-dev at swift.org> wrote: > > On ARMv7 and ARM64, the argument and return register sets are the same Nit: True on arm64. Not true on armv7; the GPR parameters are r0-r3 but GPR return is r0-r1. -- Greg Parker gparker at apple.com Runtime Wrangler