On 3/28/14, 4:05 PM, Benoit Jacob wrote:
>#define MOZ_CRASH_UNREACHABLE() \ > do { \ > MOZ_ASSUME_UNREACHABLE_MARKER(); \ > MOZ_CRASH("MOZ_CRASH_UNREACHABLE"); \ > } while (0) >MOZ_ASSUME_UNREACHABLE_MARKER tells the compiler "feel free to arbitrarily miscompile this, and anything from that point on in this branch, as you may assume that this code is unreachable". So it doesn't really serve any purpose to add a MOZ_CRASH after a MOZ_ASSUME_UNREACHABLE_MARKER.
I included MOZ_ASSUME_UNREACHABLE_MARKER because that macro is the compiler-specific "optimize me" intrinsic, which I believe was the whole point of the original MOZ_ASSUME_UNREACHABLE.
AFAIU, MOZ_ASSUME_UNREACHABLE_MARKER crashes on all Gecko platforms, but I included MOZ_CRASH to ensure the behavior was consistent for all platforms.
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