> The patch fixes that by calculating the size of the first element by > taking the size of the outer mode and subtracting the size of the second > element. > > I've added an assert to make sure that the second element is not also a > const_int, as a vec_concat of const_ints doesn't make sense as far as I can > see.
I'm not sure about the assert, can't we just punt in this case? > Bootstrapped and tested on aarch64-none-linux-gnu, > arm-none-linux-gnueabihf, x86_64-linux-gnu. > This bug appears on trunk, 4.9 and 4.8, so it's not a regression on the > release branches but it is a wrong-code bug. I think that the fix would be acceptable for GCC 5 without the assert. -- Eric Botcazou
