sparse-llvm duplicate declarations of data

sparse-llvm duplicate declarations of data

[Dibyendu Majumdar]

Hi,

In the following test case:

static int once;
static int once = 1;
extern int printf(const char *, ...);
static int value(int *p)
{
 return *p;
}
int main(void)
{
 return value(&once) == 1 ? 0 : 1;
}

Sparse-llvm declares the global 'once' twice as there is a check
missing on whether the global has already been defined.

Regards

Re: sparse-llvm duplicate declarations of data

[Luc Van Oostenryck]

On Tue, Mar 14, 2017 at 08:29:46PM +0000, Dibyendu Majumdar wrote:
> Hi,
> 
> In the following test case:
> 
> static int once;
> static int once = 1;
> extern int printf(const char *, ...);
> static int value(int *p)
> {
>  return *p;
> }
> int main(void)
> {
>  return value(&once) == 1 ? 0 : 1;
> }
> 
> Sparse-llvm declares the global 'once' twice as there is a check
> missing on whether the global has already been defined.

Yes, this is a known issue.
It's because sparse doesn't do yet the consolidation of declarations.


-- Luc