majnemer added a comment.
So how does something like the following work:
union U { float f; int i; };
void f(union U u);
The flattening described in
https://github.com/riscv/riscv-elf-psabi-doc/blob/master/riscv-elf.md#hardware-floating-point-calling-convention
makes sense for arrays and structs but I couldn't find where unions were
described.
https://reviews.llvm.org/D40023
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