On 10/04/2011 01:17 PM, Tom de Vries wrote: > In general, to fold vlas (which are lowered to allocas) to normal > declarations, > if the alloca argument is constant.
Ah. Ok, I suppose. How often are you seeing this happening? I can imagine a few instances via inlining, but even there not so much... > Any guidance on what to do if we have to expand the > __builtin_alloca_with_align > to a function call, specifically, with the second argument? This is currently > handled like this, which is not very nice: Don't do anything special. Just let it fall through as with alloca. This should never happen, except for stupid user tricks like -fno-builtin-alloca_with_align. And if the user does that, they get what they deserve wrt needing to implement that function in their runtime. r~
