[Bug target/40489] New: gcc.dg/builtin-unreachable-3.c doesn't work on ia64

[hjl dot tools at gmail dot com]

I got

Executing on host: /export/build/gnu/gcc/build-ia64-linux/gcc/xgcc
-B/export/build/gnu/gcc/build-ia64-linux/gcc/
/net/gnu-13/export/gnu/src/gcc/gcc/gcc/testsuite/gcc.dg/builtin-unreachable-3.c
  -O2 -S  -o builtin-unreachable-3.s    (timeout = 300)
/net/gnu-13/export/gnu/src/gcc/gcc/gcc/testsuite/gcc.dg/builtin-unreachable-3.c:
In function 'f':^M 
/net/gnu-13/export/gnu/src/gcc/gcc/gcc/testsuite/gcc.dg/builtin-unreachable-3.c:9:1:
internal compiler error: Segmentation fault^M
Please submit a full bug report,^M
with preprocessed source if appropriate.^M
See <http://gcc.gnu.org/bugs.html> for instructions.^M

Starting program: /export/build/gnu/gcc/build-ia64-linux/stage1-gcc/cc1
-fpreprocessed /tmp/x.i -quiet -dumpbase x.i -auxbase x -O2 -version -o x.s
GNU C (GCC) version 4.5.0 20090618 (experimental) [trunk revision 148658]
(ia64-unknown-linux-gnu)
        compiled by GNU C version 3.4.6 20060404 (Red Hat 3.4.6-9), GMP version
4.2.2, MPFR version 2.3.2
GGC heuristics: --param ggc-min-expand=100 --param ggc-min-heapsize=131072
GNU C (GCC) version 4.5.0 20090618 (experimental) [trunk revision 148658]
(ia64-unknown-linux-gnu)
        compiled by GNU C version 3.4.6 20060404 (Red Hat 3.4.6-9), GMP version
4.2.2, MPFR version 2.3.2
GGC heuristics: --param ggc-min-expand=100 --param ggc-min-heapsize=131072
Compiler executable checksum: 8913ea3e9927da81125036b21150e23a

Program received signal SIGSEGV, Segmentation fault.
0x4000000000ff2041 in ia64_reorg ()
    at /net/gnu-13/export/gnu/src/gcc/gcc/gcc/config/ia64/ia64.c:9243
9243          while (GET_CODE (insn) == INSN && get_attr_empty (insn) ==
EMPTY_YES)
(gdb) list
9238    
9239          insn = get_last_insn ();
9240          if (! INSN_P (insn))
9241            insn = prev_active_insn (insn);
9242          /* Skip over insns that expand to nothing.  */
9243          while (GET_CODE (insn) == INSN && get_attr_empty (insn) ==
EMPTY_YES)
9244            {
9245              if (GET_CODE (PATTERN (insn)) == UNSPEC_VOLATILE
9246                  && XINT (PATTERN (insn), 1) ==
UNSPECV_INSN_GROUP_BARRIER)
9247                saw_stop = 1;
(gdb) r
Breakpoint 3, ia64_reorg ()
    at /net/gnu-13/export/gnu/src/gcc/gcc/gcc/config/ia64/ia64.c:9240
9240          if (! INSN_P (insn))
(gdb) call debug_rtx (insn)
(note 15 5 0 NOTE_INSN_DELETED)
(gdb) next
9241            insn = prev_active_insn (insn);
(gdb) 
9243          while (GET_CODE (insn) == INSN && get_attr_empty (insn) ==
EMPTY_YES)
(gdb) p insn
$4 = (rtx) 0x0
(gdb)


-- 
           Summary: gcc.dg/builtin-unreachable-3.c doesn't work on ia64
           Product: gcc
           Version: 4.5.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: target
        AssignedTo: unassigned at gcc dot gnu dot org
        ReportedBy: hjl dot tools at gmail dot com
GCC target triplet: ia64-*-linux-gnu


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=40489