Turn off frame pointer elimination on all Apple platforms.

This ends up disabling frame pointer elimination on aarch64_apple_darwin
which matches what clang does by default along with the
aarch64_apple_ios and x86_64_apple_darwin targets.

Further, the Apple docs "Writing ARM64 Code for Apple Platforms" has a section
called "Respect the Purpose of Specific CPU Registers" which
specifically calls out the frame pointer register (x29):

   The frame pointer register (x29) must always address a valid frame
   record. Some functions — such as leaf functions or tail calls — may
   opt not to create an entry in this list As a result, stack traces
   are always meaningful, even without debug information.

Other platforms are updated to not override the default.

0 files changed, 0 insertions, 0 deletions