[Bug other/85161] New: [8 regression] Test case failures in libbacktrace on powerpc64 BE starting with r253456

[seurer at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=85161

            Bug ID: 85161
           Summary: [8 regression] Test case failures in libbacktrace on
                    powerpc64 BE starting with r253456
           Product: gcc
           Version: 8.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: other
          Assignee: unassigned at gcc dot gnu.org
          Reporter: seurer at gcc dot gnu.org
  Target Milestone: ---

With r253456| there are a bunch of test case failures in libbacktrace on
powerpc64 BE.  These works fine on powerpc64 LE.

Failures found in new revision r253456, versus failures found in previous
revision r253455
> FAIL: backtrace_full inline
> FAIL: backtrace_full inline
> FAIL: backtrace_full inline
> FAIL: backtrace_full inline
> FAIL: backtrace_full noinline
> FAIL: backtrace_full noinline
> FAIL: backtrace_full noinline
> FAIL: backtrace_full noinline
> FAIL: backtrace_simple inline
> FAIL: backtrace_simple inline
> FAIL: backtrace_simple inline
> FAIL: backtrace_simple inline
> FAIL: inflate large
> FAIL: inflate large
> FAIL: ztest
> FAIL: ztest


I ran ztest and saw this:

Revision r253455:

PASS: inflate empty
PASS: inflate hello
PASS: inflate goodbye
PASS: inflate large
backtrace time: 5275304 ns
zlib time:    : 4100007 ns
percentage    : 0.777208


Revision r253456:

PASS: inflate empty
test hello: got uncompressed length 0, want 13
test goodbye: got uncompressed length 0, want 14
inflate large: got uncompressed length 0, want 387851
FAIL: inflate large