Disabling llvm-link struct type merging

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1

Hello,

I notice llvm-link merges structurally identical struct types to avoid
duplication. As an example, the following IR before llvm-link:

%struct.B = type { %struct.A }
%struct.A = type { void (i8*, i8*)* }
%struct.C = type { %struct.A }

becomes:

%struct.B = type { %struct.A }
%struct.A = type { void (i8*, i8*)* }

after running llvm-link: it drops struct.C since it has the same layout
as struct.B.

Is there a way to tell llvm-link to _not_ merge structurally identical
struct types and use the original struct types instead, even if it
causes duplication in struct layouts?

Thanks,
-- Henri