[Bug middle-end/39927] [4.5 Regression]: build breakage for cris-elf building libstdc++-v3

["ro at techfak dot uni-bielefeld dot de" <gcc-bugzilla at gcc dot gnu dot org>]

------- Comment #5 from ro at techfak dot uni-bielefeld dot de  2009-04-27 13:35 -------
Subject: Re:  [4.5 Regression]: build breakage for cris-elf building
libstdc++-v3

ebotcazou at gcc dot gnu dot org writes:

> The revision corresponding to the fix for the PR should bootstrap.

Indeed it does. Starting from there (and the fact that
insert_partition_copy_on_edge occurs in the cc1 stacktrace), I could
identify this patch as the culprit:

2009-04-26  Michael Matz  <matz@suse.de>

        Expand from SSA.

The ICE occurs while building the sparcv9 libgcc:

% cc1 libgcc2.i -mptr64 -mstack-bias -mno-v8plus -mcpu=v9 -m64 -auxbase-strip
_absvsi2.o -O2 -fPIC
 __absvdi2 __absvsi2
Analyzing compilation unit
Performing interprocedural optimizations
 <visibility> <early_local_cleanups> <summary generate> <cp> <inline>
<static-var> <pure-const>Assembling functions:
 __absvsi2
/vol/gcc/src/gcc-dist/libgcc/../gcc/libgcc2.c: In function '__absvsi2':
/vol/gcc/src/gcc-dist/libgcc/../gcc/libgcc2.c:240: internal compiler error: in
emit_move_insn, at expr.c:3387

I get the following cc1 stacktrace:

Breakpoint 1, fancy_abort (file=0xdf8758 "/vol/gcc/src/gcc-dist/gcc/expr.c",
line=3387, function=0xdf8af8 "emit_move_insn") at
/vol/gcc/src/gcc-dist/gcc/diagnostic.c:724
(gdb) where
#0  fancy_abort (file=0xdf8758 "/vol/gcc/src/gcc-dist/gcc/expr.c", line=3387,
function=0xdf8af8 "emit_move_insn") at
/vol/gcc/src/gcc-dist/gcc/diagnostic.c:724
#1  0x003cbf18 in emit_move_insn (x=0xff0b3f80, y=0xff11a048) at
/vol/gcc/src/gcc-dist/gcc/expr.c:3386
#2  0x00cfe0c4 in insert_partition_copy_on_edge (e=0xff1d09f0, dest=3, src=0)
at /vol/gcc/src/gcc-dist/gcc/tree-outof-ssa.c:155
#3  0x00cfff0c in elim_create (g=0xf79ae0, T=3) at
/vol/gcc/src/gcc-dist/gcc/tree-outof-ssa.c:542
#4  0x00d00434 in eliminate_phi (e=0xff1d09f0, g=0xf79ae0) at
/vol/gcc/src/gcc-dist/gcc/tree-outof-ssa.c:583
#5  0x00d01480 in expand_phi_nodes (sa=0xf3bb5c) at
/vol/gcc/src/gcc-dist/gcc/tree-outof-ssa.c:756
#6  0x00c129ac in gimple_expand_cfg () at
/vol/gcc/src/gcc-dist/gcc/cfgexpand.c:2505
#7  0x00662284 in execute_one_pass (pass=0xe9c7f8) at
/vol/gcc/src/gcc-dist/gcc/passes.c:1286
#8  0x00662638 in execute_pass_list (pass=0xe9c7f8) at
/vol/gcc/src/gcc-dist/gcc/passes.c:1335
#9  0x00866fc4 in tree_rest_of_compilation (fndecl=0xff0dc180) at
/vol/gcc/src/gcc-dist/gcc/tree-optimize.c:394
#10 0x00afe8a4 in cgraph_expand_function (node=0xfef8ea00) at
/vol/gcc/src/gcc-dist/gcc/cgraphunit.c:1051
#11 0x00afeb40 in cgraph_expand_all_functions () at
/vol/gcc/src/gcc-dist/gcc/cgraphunit.c:1110
#12 0x00aff39c in cgraph_optimize () at
/vol/gcc/src/gcc-dist/gcc/cgraphunit.c:1324
#13 0x001267a8 in c_write_global_declarations () at
/vol/gcc/src/gcc-dist/gcc/c-decl.c:8306
#14 0x007c4750 in compile_file () at /vol/gcc/src/gcc-dist/gcc/toplev.c:988
#15 0x007c7a5c in do_compile () at /vol/gcc/src/gcc-dist/gcc/toplev.c:2248
#16 0x007c7b80 in toplev_main (argc=11, argv=0xffbff604) at
/vol/gcc/src/gcc-dist/gcc/toplev.c:2293
#17 0x00213aa4 in main (argc=11, argv=0xffbff604) at
/vol/gcc/src/gcc-dist/gcc/main.c:35


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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=39927