[cfe-dev] Default stack alignment for x86 changed

[Joerg Sonnenberger]

On Thu, Jan 15, 2015 at 09:23:33AM -0700, palparni wrote:
> LLVM change 147888 a while back modified the alignment from 8
> to 4 without giving more concrete reasons for it.

The SysV ABI says it is 32bit. double itself has only 32bit alignment.
If there is any item on the stack that requires more, it will be
realigned automatically, but that comes with some cost, too, like an
additional register used.

Joerg