Commits on Jul 12, 2024

1. Extend usage of GC_ALLOC_ALIGN8 …

   In the past we added FEATURE_64BIT_ALIGNMENT to support 8 byte alignment
   requirements on ARM, but for performance we also like to 8 byte align
   double arrays on other architectures. The GC has a GC_ALLOC_ALIGN8 flag
   that does that but it was only being used in the ARM case and we had
   a more complicated workaround being used elsewhere. This change expands
   GC_ALLOC_ALIGN8 so it is supported on all architectures and converges
   all our aligned double arrays to use that approach.
   
   GC_ALLOC_ALIGN8 only implies that the initial allocation is 8 byte
   aligned, not that it will stay aligned after relocation. On ARM it will
   stay aligned because RESPECT_LARGE_ALIGNMENT is defined but
   on other 32 bit architectures it is not guaranteed to stay aligned.

   

   noahfalk committed Jul 12, 2024
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