Re: sparse-llvm array size computation issue

[Dibyendu Majumdar <mobile@majumdar.org.uk>]

On 28 March 2017 at 21:25, Dibyendu Majumdar <mobile@majumdar.org.uk> wrote:
> I am investigating an issue with following test case:
>
> int main(void)
> {
> const char *names[] = {
> "dibyendu",
> "majumdar",
> NULL,
> };
> return 0;
> }
>
> The issue here is that sparse-llvm thinks the array size is zero:
>
> define i32 @main() {
> L0:
>   %names_0000026DE9D2DDA8. = alloca [0 x i8*]
>
> It appears that sparse is correctly calculating the size of the array
> in examine_node_type() in symbol.c, but by the time the symbol gets to
> sparse-llvm the bit_size is somehow changed to -1. I haven't yet
> tracked down where this is happening.
>

Looks like the computed bit_size is being held on the SYM_NODE but
sparse-llvm looks as the bit_size field in the SYM_ARRAY node. Does
this sound like a problem - i.e. somehow the SYM_ARRAY is not getting
its size set?

Regards
Dibyendu