[llvm-bugs] [Bug 39258] New: Coverage mapping fails with "File exit not handled before popRegions" on #define'd goto

[via llvm-bugs]

https://bugs.llvm.org/show_bug.cgi?id=39258

            Bug ID: 39258
           Summary: Coverage mapping fails with "File exit not handled
                    before popRegions" on #define'd goto
           Product: clang
           Version: trunk
          Hardware: PC
                OS: Linux
            Status: NEW
          Severity: enhancement
          Priority: P
         Component: -New Bugs
          Assignee: unassignedclangbugs at nondot.org
          Reporter: orivej at gmx.fr
                CC: llvm-bugs at lists.llvm.org

This command:

     clang -c test.c -fprofile-instr-generate -fcoverage-mapping

fails on this input:

     #define g goto

     void loop(unsigned count) {
     begin:
         if (count--)
             g begin;
     }

with:

     fatal error: error in backend: File exit not handled before popRegions

This affects all versions of Clang, from 4 to trunk. (Tested on
x86_64-linux-gnu.)

The test was reduced from
https://github.com/scipy/scipy/blob/v1.1.0/scipy/signal/sigtoolsmodule.c#L148.

This issue is different from https://bugs.llvm.org/show_bug.cgi?id=38987

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