It seems that in r126296, tree-ssa-pre is using much more memory compiling libjava/interperter.cc than it did in r126044. I had to kill it after it was thrashing for more than 24 hours on my 128MB build machine.
Configured thusly:../gcc/configure --with-arch=mips32 --with-float=soft --disable-java-awt --without-x --disable-tls --enable-__cxa_atexit --disable-jvmpi --disable-static --disable-libmudflap --enable-languages=c,c++,java At the time I killed it, it was using 342MB according to top. (gdb) bt #0 __libc_free (mem=0x58620b0) at malloc.c:3341 #1 0x00c94bec in htab_delete (htab=0x124ad08) at ../../gcc/libiberty/hashtab.c:396 #2 0x00a24340 in fini_pre () at ../../gcc/gcc/tree-ssa-pre.c:3929 #3 0x00a33040 in execute_pre (do_fre=0 '\0') at ../../gcc/gcc/tree-ssa-pre.c:4030 #4 0x00a33fb4 in do_pre () at ../../gcc/gcc/tree-ssa-pre.c:4038 #5 0x00861e98 in execute_one_pass (pass=0xddcef0) at ../../gcc/gcc/passes.c:1125 #6 0x008621c8 in execute_pass_list (pass=0xddcef0) at ../../gcc/gcc/passes.c:1178 #7 0x008621e4 in execute_pass_list (pass=0xddc3f0) at ../../gcc/gcc/passes.c:1179 #8 0x00976578 in tree_rest_of_compilation (fndecl=0x2b0c3600) at ../../gcc/gcc/tree-optimize.c:406 #9 0x00591188 in expand_body (fn=0x2b0c3600) at ../../gcc/gcc/cp/semantics.c:3136 #10 0x00b075e8 in cgraph_expand_function (node=0x2bd8aa00) at ../../gcc/gcc/cgraphunit.c:1073 #11 0x00b0a90c in cgraph_optimize () at ../../gcc/gcc/cgraphunit.c:1142 #12 0x0050a7e8 in cp_write_global_declarations () at ../../gcc/gcc/cp/decl2.c:3310 #13 0x0090b470 in toplev_main (argc=<value optimized out>, argv=<value optimized out>) at ../../gcc/gcc/toplev.c:1064 #14 0x2ab96984 in __libc_start_main (main=0x63f420 <main>, argc=75, ubp_av=0x7fb04b64, init=0xcc5540 <__libc_csu_init>, fini=0x2aafd6b8 <_rtld_local>, rtld_fini=0x7fb054aa, stack_end=0x48) -- Summary: [4.3 Regression] Bootstrap failure with excessive memory consumption in tree-ssa-pre compiling libjava/interperter.c Product: gcc Version: 4.3.0 Status: UNCONFIRMED Keywords: build Severity: normal Priority: P3 Component: tree-optimization AssignedTo: unassigned at gcc dot gnu dot org ReportedBy: daney at gcc dot gnu dot org GCC build triplet: mipsel-linux-gnu GCC host triplet: mipsel-linux-gnu GCC target triplet: mipsel-linux-gnu http://gcc.gnu.org/bugzilla/show_bug.cgi?id=32653