[llvm-bugs] [Bug 47281] New: case statement with macro leads to compile-time error

[via llvm-bugs]

https://bugs.llvm.org/show_bug.cgi?id=47281

            Bug ID: 47281
           Summary: case statement with macro leads to compile-time error
           Product: flang
           Version: trunk
          Hardware: PC
                OS: All
            Status: NEW
          Severity: normal
          Priority: P
         Component: Frontend
          Assignee: unassignedbugs at nondot.org
          Reporter: naromero at anl.gov
                CC: David.Truby at arm.com, jperier at nvidia.com,
                    kirankumartp at gmail.com, llvm-bugs at lists.llvm.org,
                    sscalpone at nvidia.com

Created attachment 23883
  --> https://bugs.llvm.org/attachment.cgi?id=23883&action=edit
case statement with macro from NWChem

This is a reduced test case from NWChem.

gfortran and pgi can compile this reduced test case.

If you comment out these lines:
              case (NWXC_DISP_D3)
                 write (*,*) "hello"

The test case compiles.

Something about the macro + case statement throws the Flang front-end off.

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