[Bug tree-optimization/18521] New: ICE: verify_flow_info failed with -O2 -funswitch-loops

[micis at gmx dot de]

I tried to compile mysql-4.1.6-gamma with the actual gcc snapshot an got an ICE 
when I use -funswitch-loops at -O1 and above.

This is a recent regression since snapshot 20040225 works.

Michael Cieslinski



gcc40f -pipe -O2 -funswitch-loops  -c -o term.o term.i -v
Reading specs from /usr/local/gcc40f/lib/gcc/powerpc-unknown-linux-
gnu/4.0.0/specs
Configured with: ../gcc40/configure --prefix=/usr/local/gcc40f --program-
suffix=40f --with-cpu=G5 --enable-altivec --enable-languages=c,c++ --enable-
checking
Thread model: posix
gcc version 4.0.0 20041114 (experimental)
 /usr/local/gcc40f/libexec/gcc/powerpc-unknown-linux-gnu/4.0.0/cc1 -
fpreprocessed term.i -quiet -dumpbase term.i -mcpu=G5 -auxbase-strip term.o -
O2 -version -funswitch-loops -o - |
 as -mpower4 -maltivec -many -V -Qy -o term.o -
GNU assembler version 2.15.90 (ppc-redhat-linux) using BFD version 2.15.90 
20040225
GNU C version 4.0.0 20041114 (experimental) (powerpc-unknown-linux-gnu)
        compiled by GNU C version 4.0.0 20041114 (experimental).
GGC heuristics: --param ggc-min-expand=30 --param ggc-min-heapsize=4096
term.c: In function â?~term_echotcâ?T:
term.c:1367: error: Missing edge 157->45
term.c:1367: error: Missing edge 157->45
term.c:1367: error: Missing edge 157->119
term.c:1367: error: Missing edge 157->119
term.c:1367: error: Missing edge 157->119
term.c:1367: error: Missing edge 157->45
term.c:1367: error: Missing edge 157->119
term.c:1367: error: Missing edge 157->119
term.c:1367: error: Missing edge 157->119
term.c:1367: internal compiler error: verify_flow_info failed
Please submit a full bug report, with preprocessed source if appropriate.

-- 
           Summary: ICE: verify_flow_info failed with -O2 -funswitch-loops
           Product: gcc
           Version: 4.0.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P2
         Component: tree-optimization
        AssignedTo: unassigned at gcc dot gnu dot org
        ReportedBy: micis at gmx dot de
                CC: gcc-bugs at gcc dot gnu dot org
 GCC build triplet: powerpc-unknown-linux-gnu
  GCC host triplet: powerpc-unknown-linux-gnu
GCC target triplet: powerpc-unknown-linux-gnu


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=18521