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[Bug bootstrap/36141] New: [4.4 Regression]: Gcc 4.4 failed to boostrap

On Linux/ia64, gcc 4.4 revision 134951 failed with
-B/usr/gcc-4.4/ia64-unknown-linux-gnu/lib/ -isystem
/usr/gcc-4.4/ia64-unknown-linux-gnu/include -isystem
/usr/gcc-4.4/ia64-unknown-linux-gnu/sys-include -DHAVE_CONFIG_H -I.
-I/net/gnu-13/export/gnu/src/gcc/gcc/libffi -I. -I.
-I/net/gnu-13/export/gnu/src/gcc/gcc/libffi/include -Iinclude
-I/net/gnu-13/export/gnu/src/gcc/gcc/libffi/src -Wall -g -fexceptions -g -O2
-MT src/ia64/ffi.lo -MD -MP -MF src/ia64/.deps/ffi.Tpo -c
/net/gnu-13/export/gnu/src/gcc/gcc/libffi/src/ia64/ffi.c  -fPIC -DPIC -o
/net/gnu-13/export/gnu/src/gcc/gcc/libffi/src/ia64/ffi.c: In function
/net/gnu-13/export/gnu/src/gcc/gcc/libffi/src/ia64/ffi.c:408: internal compiler
error: in copy_reference_ops_from_ref, at tree-ssa-sccvn.c:580
Please submit a full bug report, 
with preprocessed source if appropriate.
See <> for instructions.

Revision 134946 is OK. I think revision 134947:

is the cause.

           Summary: [4.4 Regression]: Gcc 4.4 failed to boostrap
           Product: gcc
           Version: 4.4.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: bootstrap
        AssignedTo: unassigned at gcc dot gnu dot org
        ReportedBy: hjl dot tools at gmail dot com
GCC target triplet: ia64-unknown-linux-gnu

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