- Get rid of debugging support in order to get rid of the V8-specific C   compiler frame size used there so this whole thing is V8/V9-agnostic. - Use 32-bit function alignment as GCC does when using UltraSPARC I or   higher optimizations. - Don't waste delay slots when possible.
- Get rid of debugging support in order to get rid of the V8-specific C
  compiler frame size used there so this whole thing is V8/V9-agnostic.
- Use 32-bit function alignment as GCC does when using UltraSPARC I or
  higher optimizations.
- Don't waste delay slots when possible.

Unfortunately, this still doesn't make libcompiler_rt a viable replacement
for libgcc on sparc64 though as once installed instead, buildworld times
increase by nearly 60% (which isn't related to these assembler functions).

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