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[Bug bootstrap/43921] New: Bootstrap comparison fails when using -march=atom


When I try to build gcc-4.5 with gcc-4.5 using -march=atom it fails when
comparing stage2 and 3: 

Comparing stages 2 and 3
warning: gcc/cc1plus-checksum.o differs
warning: gcc/cc1-checksum.o differs
Bootstrap comparison failure!
gcc/graphite-interchange.o differs
gcc/dwarf2out.o differs
gcc/tree-cfg.o differs
gcc/gcc.o differs
gcc/ipa-struct-reorg.o differs
gcc/tree-outof-ssa.o differs
gcc/reg-stack.o differs
gcc/cgraphbuild.o differs
gcc/profile.o differs
gcc/sched-rgn.o differs
gcc/cfgexpand.o differs
gcc/collect2.o differs
gcc/sched-ebb.o differs
gcc/tree-ssa-ccp.o differs
gcc/omega.o differs
gcc/tree-if-conv.o differs
gcc/tree-vect-slp.o differs
gcc/tree-ssa-reassoc.o differs
gcc/tree-ssa-structalias.o differs
gcc/fortran/trans-io.o differs
gcc/fortran/trans.o differs
gcc/fortran/arith.o differs
gcc/fortran/decl.o differs
gcc/tree-ssa-loop-ivopts.o differs
gcc/gimple-pretty-print.o differs
gcc/tree-switch-conversion.o differs
gcc/graph.o differs
gcc/cp/call.o differs
gcc/c-lex.o differs
gcc/opts.o differs
gcc/varasm.o differs
gcc/tree-vect-loop-manip.o differs
gcc/bt-load.o differs
gcc/diagnostic.o differs
gcc/tree-ssa-live.o differs
gcc/tree-ssa-dom.o differs
gcc/reload.o differs
gcc/tree-parloops.o differs
gcc/tree-pretty-print.o differs
gcc/params.o differs
gcc/builtins.o differs
gcc/lto-streamer-in.o differs
gcc/sched-deps.o differs
gcc/haifa-sched.o differs
gcc/cse.o differs
gcc/ipa-prop.o differs
gcc/c-pragma.o differs
gcc/tree-vrp.o differs
gcc/c-common.o differs
gcc/print-tree.o differs
gcc/tree-affine.o differs
gcc/graphite-clast-to-gimple.o differs
gcc/tree-eh.o differs
gcc/c-parser.o differs
gcc/tree-phinodes.o differs
gcc/tree-data-ref.o differs
gcc/lambda-code.o differs
gcc/build/gengtype-parse.o differs
gcc/ipa-type-escape.o differs
gcc/ipa-cp.o differs
gcc/tree-inline.o differs
libcpp/files.o differs
libcpp/traditional.o differs
libcpp/lex.o differs
libcpp/charset.o differs
libiberty/regex.o differs
libiberty/pic/regex.o differs
make[2]: *** [compare] Fel 1
make[2]: Leaving directory `/tmp/portage/sys-devel/gcc-4.5.0/work/build'
make[1]: *** [stage3-bubble] Fel 2
make[1]: Leaving directory `/tmp/portage/sys-devel/gcc-4.5.0/work/build'
make: *** [bootstrap-lean] Fel 2

Initially gcc-4.5 was built with gcc-4.4.3 using -march=core2 -mtune=generic.

This is my first GCC bug report so I'm not sure what else I need to provide.


-- 
           Summary: Bootstrap comparison fails when using -march=atom
           Product: gcc
           Version: 4.5.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: bootstrap
        AssignedTo: unassigned at gcc dot gnu dot org
        ReportedBy: nisselarsson at home dot se


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=43921


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