[Bug tree-optimization/71736] New: ICE in verify_ssa

[bernd.edlinger at hotmail dot de]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=71736

            Bug ID: 71736
           Summary: ICE in verify_ssa
           Product: gcc
           Version: 7.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: tree-optimization
          Assignee: unassigned at gcc dot gnu.org
          Reporter: bernd.edlinger at hotmail dot de
  Target Milestone: ---

Hi,

when building the latest stable busybox version 2.24.2
there is an ICE in verify_ssa:
make defconfig
make
  CC      mailutils/mail.o
mailutils/mail.c: In function 'launch_helper':
mailutils/mail.c:183:1: error: definition in block 5 does not dominate use in
block 9
 }
 ^
for SSA_NAME: ptr_to_globals.0_2 in statement:
# .MEM_26 = VDEF <.MEM_22>
ptr_to_globals.0_2->helper_pid = _25;
mailutils/mail.c:183:1: internal compiler error: verify_ssa failed
0xd792cc verify_ssa(bool, bool)
        ../../gcc-trunk/gcc/tree-ssa.c:1039
0xaa24ed execute_function_todo
        ../../gcc-trunk/gcc/passes.c:1971
0xaa34eb execute_todo
        ../../gcc-trunk/gcc/passes.c:2016
Please submit a full bug report,
with preprocessed source if appropriate.
Please include the complete backtrace with any bug report.
See <http://gcc.gnu.org/bugs.html> for instructions.
make[1]: *** [mailutils/mail.o] Error 1
make: *** [mailutils] Error 2