[Bug c/86093] New: volatile ignored on pointer in C

[glisse at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=86093

            Bug ID: 86093
           Summary: volatile ignored on pointer in C
           Product: gcc
           Version: 9.0
            Status: UNCONFIRMED
          Keywords: wrong-code
          Severity: normal
          Priority: P3
         Component: c
          Assignee: unassigned at gcc dot gnu.org
          Reporter: glisse at gcc dot gnu.org
  Target Milestone: ---

extern char*volatile i;
int f(){return i-i;}

gets simplified in C as 1 load and return 0. In C++ or if i has a non-pointer
type (say int), we do have 2 loads and a subtraction.