...POD types should not be passed in registers anyway, right?

Even when ignoring constructors in...

...total so GCC passes this struct in registers on x86_64 and it's therefore...

...array, but Dmain does not set these registers, so they have garbage values.

-- 
Configure issuemail...

Yes.
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...currently uses pushad to ensure that all registers are on the stack to be scannable...

...cause an opaque function call so :
 - All registers that the callee is allowed to trash...

...s.i);
}

Without dg1() call, dmd arranges registers's content correctly. However in presence of...

...structs) and LDC (small structs passed as varargs when there are still registers available).


David

...is a issue with misalignment of SSE registers. Removing the assert(0) causes an ICE...

...32bit or more. Thumb only limits instruction size to 16bit, the registers are still 32bit.