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[Bug tree-optimization/80948] New: [8 regression] test case gcc.dg/torture/pr68017.c fails with ICE starting with r248771


https://gcc.gnu.org/bugzilla/show_bug.cgi?id=80948

            Bug ID: 80948
           Summary: [8 regression] test case gcc.dg/torture/pr68017.c
                    fails with ICE starting with r248771
           Product: gcc
           Version: 8.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: tree-optimization
          Assignee: unassigned at gcc dot gnu.org
          Reporter: seurer at gcc dot gnu.org
  Target Milestone: ---

Fails on powerpc64 LE and BE for power8/7/6

make -k check-gcc RUNTESTFLAGS=dg-torture.exp=gcc.dg/torture/pr68017.c

spawn /home/seurer/gcc/build/gcc-test/gcc/xgcc
-B/home/seurer/gcc/build/gcc-test/gcc/
/home/seurer/gcc/gcc-test/gcc/testsuite/gcc.dg/torture/pr68017.c
-fno-diagnostics-show-caret -fdiagnostics-color=never -O3 -g -g -S -o pr68017.s
/home/seurer/gcc/gcc-test/gcc/testsuite/gcc.dg/torture/pr68017.c: In function
'fn2':
/home/seurer/gcc/gcc-test/gcc/testsuite/gcc.dg/torture/pr68017.c:13:1: error:
definition in block 3 follows the use
for SSA_NAME: _16 in statement:
_5 = _16 * 2;
during GIMPLE pass: tailc
/home/seurer/gcc/gcc-test/gcc/testsuite/gcc.dg/torture/pr68017.c:13:1: internal
compiler error: verify_ssa failed
0x10be7a9b verify_ssa(bool, bool)
        /home/seurer/gcc/gcc-test/gcc/tree-ssa.c:1183
0x10829a0f execute_function_todo
        /home/seurer/gcc/gcc-test/gcc/passes.c:1995
0x1082a613 do_per_function
        /home/seurer/gcc/gcc-test/gcc/passes.c:1654
0x1082a893 execute_todo
        /home/seurer/gcc/gcc-test/gcc/passes.c:2042
Please submit a full bug report,
with preprocessed source if appropriate.
Please include the complete backtrace with any bug report.
See <https://gcc.gnu.org/bugs/> for instructions.
compiler exited with status 1
output is:
/home/seurer/gcc/gcc-test/gcc/testsuite/gcc.dg/torture/pr68017.c: In function
'fn2':
/home/seurer/gcc/gcc-test/gcc/testsuite/gcc.dg/torture/pr68017.c:13:1: error:
definition in block 3 follows the use
for SSA_NAME: _16 in statement:
_5 = _16 * 2;
during GIMPLE pass: tailc
/home/seurer/gcc/gcc-test/gcc/testsuite/gcc.dg/torture/pr68017.c:13:1: internal
compiler error: verify_ssa failed
0x10be7a9b verify_ssa(bool, bool)
        /home/seurer/gcc/gcc-test/gcc/tree-ssa.c:1183
0x10829a0f execute_function_todo
        /home/seurer/gcc/gcc-test/gcc/passes.c:1995
0x1082a613 do_per_function
        /home/seurer/gcc/gcc-test/gcc/passes.c:1654
0x1082a893 execute_todo
        /home/seurer/gcc/gcc-test/gcc/passes.c:2042
Please submit a full bug report,
with preprocessed source if appropriate.
Please include the complete backtrace with any bug report.
See <https://gcc.gnu.org/bugs/> for instructions.

FAIL: gcc.dg/torture/pr68017.c   -O3 -g  (internal compiler error)
FAIL: gcc.dg/torture/pr68017.c   -O3 -g  (test for excess errors)
Excess errors:
/home/seurer/gcc/gcc-test/gcc/testsuite/gcc.dg/torture/pr68017.c:13:1: error:
definition in block 3 follows the use
for SSA_NAME: _16 in statement:
_5 = _16 * 2;
during GIMPLE pass: tailc
/home/seurer/gcc/gcc-test/gcc/testsuite/gcc.dg/torture/pr68017.c:13:1: internal
compiler error: verify_ssa failed
0x10be7a9b verify_ssa(bool, bool)
        /home/seurer/gcc/gcc-test/gcc/tree-ssa.c:1183
0x10829a0f execute_function_todo
        /home/seurer/gcc/gcc-test/gcc/passes.c:1995
0x1082a613 do_per_function
        /home/seurer/gcc/gcc-test/gcc/passes.c:1654
0x1082a893 execute_todo
        /home/seurer/gcc/gcc-test/gcc/passes.c:2042

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