[Bug middle-end/71716] New: [7 Regression] gcc.dg/atomic/c11-atomic-exec-4.c is compiled into infinite loop

[hjl.tools at gmail dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=71716

            Bug ID: 71716
           Summary: [7 Regression] gcc.dg/atomic/c11-atomic-exec-4.c is
                    compiled into infinite loop
           Product: gcc
           Version: 7.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: middle-end
          Assignee: unassigned at gcc dot gnu.org
          Reporter: hjl.tools at gmail dot com
  Target Milestone: ---
            Target: x86-64

On x86-64, as of r237817

gcc.dg/atomic/c11-atomic-exec-1.c
gcc.dg/atomic/c11-atomic-exec-3.c
gcc.dg/atomic/c11-atomic-exec-4.c

are compiled into infinite loop.