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Break down a D type into basic (register) types for the 32-bit x86 ABI.
TypeTuple toArgTypes_x86(Type t);
This breaks a type down into 'simpler' types that can be passed to a function in registers, and returned in registers. This is the implementation for the 32-bit x86 ABI.
Type t type to break down
tuple of types, each element can be passed in a register. A tuple of zero length means the type cannot be passed/returned in registers. null indicates a void.