[Bug bootstrap/81638] New: AIX bootstrap failure due to Recover GOTO predictor

[dje at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=81638

            Bug ID: 81638
           Summary: AIX bootstrap failure due to Recover GOTO predictor
           Product: gcc
           Version: 8.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: bootstrap
          Assignee: unassigned at gcc dot gnu.org
          Reporter: dje at gcc dot gnu.org
  Target Milestone: ---
            Target: powerpc-ibm-aix*

The patch breaks bootstrap on AIX and probably is a hidden bug on all targets.

With the patch, libbacktrace/xcoff.c fails to compile with the error:

/nasfarm/edelsohn/src/src/libbacktrace/xcoff.c: In function 'xcoff_add':
/nasfarm/edelsohn/src/src/libbacktrace/xcoff.c:822:13: error: 'incl'
may be used uninitialized in this function
[-Werror=maybe-uninitialized]
    filename = incl->filename;
    ~~~~~~~~~^~~~~~~~~~~~~~~~
/nasfarm/edelsohn/src/src/libbacktrace/xcoff.c:777:22: note: 'incl'
was declared here
   struct xcoff_incl *incl;
                      ^~~~

incl is used immediately above the line that produces the warning --
with no warning.