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[Bug debug/49841] New: dwarf2cfi ICE during bootstrap on AIX


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=49841

           Summary: dwarf2cfi ICE during bootstrap on AIX
           Product: gcc
           Version: 4.7.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: debug
        AssignedTo: unassigned@gcc.gnu.org
        ReportedBy: dje@gcc.gnu.org


/tmp/20110725/./gcc/xgcc -B/tmp/20110725/./gcc/
-B/farm/dje/install/powerpc-ibm-aix5.3.0.0-20110725/powerpc-ibm-aix5.3.0.0/bin/
-B/farm/dje/install/powerpc-ibm-aix5.3.0.0-20110725/powerpc-ibm-aix5.3.0.0/lib/
-isystem
/farm/dje/install/powerpc-ibm-aix5.3.0.0-20110725/powerpc-ibm-aix5.3.0.0/include
-isystem
/farm/dje/install/powerpc-ibm-aix5.3.0.0-20110725/powerpc-ibm-aix5.3.0.0/sys-include
   -g -O2 -O2  -g -O2 -DIN_GCC   -W -Wall -Wwrite-strings -Wcast-qual
-Wstrict-prototypes -Wmissing-prototypes -Wold-style-definition  -isystem
./include  -mlong-double-128 -g -DHAVE_GTHR_DEFAULT -DIN_LIBGCC2
-fbuilding-libgcc -fno-stack-protector   -I. -I. -I../.././gcc
-I/farm/dje/src/src/libgcc -I/farm/dje/src/src/libgcc/.
-I/farm/dje/src/src/libgcc/../gcc -I/farm/dje/src/src/libgcc/../include 
-DHAVE_CC_TLS -DUSE_EMUTLS -o unwind-dw2.o -MT unwind-dw2.o -MD -MP -MF
unwind-dw2.dep -fexceptions -c /farm/dje/src/src/libgcc/../gcc/unwind-dw2.c 

In file included from /farm/dje/src/src/libgcc/../gcc/unwind-dw2.c:1590:0:
/farm/dje/src/src/libgcc/../gcc/unwind.inc: In function
'_Unwind_RaiseException':
/farm/dje/src/src/libgcc/../gcc/unwind.inc:136:1: internal compiler error: in
maybe_record_trace_start, at dwarf2cfi.c:2444

      /* We ought to have the same state incoming to a given trace no
         matter how we arrive at the trace.  Anything else means we've
         got some kind of optimization error.  */
      gcc_checking_assert (cfi_row_equal_p (cur_row, ti->beg_row));

The ICE occurs during stage 1 build of libgcc for all multilib variants of
unwind-dw2.c


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