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On Tue, Aug 7, 2012 at 10:59 AM, Anton Korobeynikov <anton at korobeynikov.info> wrote: >>> See ARMCallingConv.td:113. The alignment of the arg is checked and if >>> it's 8-byte aligned, the proper registers are chosen. >> >> Are you sure? In this case, it looks like the frontend is translating the argument type to [2 x i32], so it's not going to have

> Which is how llvm-gcc lowered this. This is a clang bug. > >> Probably all the "alignment" logic needs to be moved upper to frontend... > > There have been several proposals to unify all this argument passing > logic, but most have focused on doing it later in the backend. A long time ago I did this for ppc on llvm-gcc by adding dummy arguments when passing in

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