[Bug c/87348] New: Implement -Watomic-implicit-seq-cst

[marxin at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87348

            Bug ID: 87348
           Summary: Implement -Watomic-implicit-seq-cst
           Product: gcc
           Version: 9.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: c
          Assignee: unassigned at gcc dot gnu.org
          Reporter: marxin at gcc dot gnu.org
  Target Milestone: ---

Maybe we would like to implement the same warning as LLVM:
https://reviews.llvm.org/rL341860