[Bug other/85123] New: [8 regression] test case gcc.dg/pr63594-2.c begins failing with r254862

[seurer at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=85123

            Bug ID: 85123
           Summary: [8 regression] test case gcc.dg/pr63594-2.c begins
                    failing with r254862
           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: ---

Created attachment 43803
  --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=43803&action=edit
preprocessed test case that shows problem

This is failing on powerpc64 BE but works on powerpc64 LE.

spawn -ignore SIGHUP /home/seurer/gcc/build/gcc-test2/gcc/xgcc
-B/home/seurer/gcc/build/gcc-test2/gcc/
/home/seurer/gcc/gcc-test2/gcc/testsuite/gcc.dg/pr63594-2.c
-fno-diagnostics-show-caret -fdiagnostics-color=never -O2 -Wno-psabi -lm -o
./pr63594-2.exe
PASS: gcc.dg/pr63594-2.c (test for excess errors)
FAIL: gcc.dg/pr63594-2.c execution test
testcase /home/seurer/gcc/gcc-test2/gcc/testsuite/gcc.dg/dg.exp completed in 1
seconds

                === gcc Summary ===

# of expected passes            1
# of unexpected failures        1


Ugh, OK, this test case is mostly #defines.  The failure is in test3float1 on
line 1007 of the preprocessed and prettied source attacked.

Program received signal SIGABRT, Aborted.
0x00003fffb7cd129c in .raise () from /lib64/libc.so.6
Missing separate debuginfos, use: debuginfo-install
glibc-2.17-196.el7_4.2.ppc64
(gdb) where
#0  0x00003fffb7cd129c in .raise () from /lib64/libc.so.6
#1  0x00003fffb7cd34a8 in .abort () from /lib64/libc.so.6
#2  0x000000001000221c in test3float1 () at ./pr63594-2.c:1007
#3  0x00000000100004f8 in main () at ./pr63594-2.c:1274