Between 20090702 and 20090717, compiling genattrtab.c in stage 2 fails on Solaris 11/SPARC like this:
% /vol/gccsrc/obj/gcc-4.5.0-20090717/11-gcc/./prev-gcc/xgcc -B/vol/gccsrc/obj/gcc-4.5.0-20090717/11-gcc/./prev-gcc/ -B/vol/gcc/sparc-sun-solaris2.11/bin/ -B/vol/gcc/sparc-sun-solaris2.11/bin/ -B/vol/gcc/sparc-sun-solaris2.11/lib/ -isystem /vol/gcc/sparc-sun-solaris2.11/include -isystem /vol/gcc/sparc-sun-solaris2.11/sys-include -c -g -O2 -DIN_GCC -W -Wall -Wwrite-strings -Wcast-qual -Wstrict-prototypes -Wmissing-prototypes -Wmissing-format-attribute -pedantic -Wno-long-long -Wno-variadic-macros -Wno-overlength-strings -Werror -Wold-style-definition -Wc++-compat -fno-common -DHAVE_CONFIG_H -DGENERATOR_FILE -I. -Ibuild -I/vol/gcc/src/gcc-dist/gcc -I/vol/gcc/src/gcc-dist/gcc/build -I/vol/gcc/src/gcc-dist/gcc/../include -I/vol/gcc/src/gcc-dist/gcc/../libcpp/include -I/vol/gcc/include -I/vol/gcc/include -I/vol/gcc/src/gcc-dist/gcc/../libdecnumber -I/vol/gcc/src/gcc-dist/gcc/../libdecnumber/dpd -I../libdecnumber -o build/genattrtab.o /vol/gcc/src/gcc-dist/gcc/genattrtab.c /vol/gcc/src/gcc-dist/gcc/genattrtab.c: In function 'attr_rtx_1': /vol/gcc/src/gcc-dist/gcc/genattrtab.c:479:28: internal compiler error: tree check: expected class 'expression', have 'declaration' (var_decl) in gimplify_va_arg_expr, at builtins.c:5107 This can be reproduced even with cc1 -fpreprocessed -quiet genattrtab.i -- Summary: [4.5 regression] ICE : tree check: expected class 'expression', have 'declaration' (var_decl) in gimplify_va_arg_expr, at builtins.c:5107 Product: gcc Version: 4.5.0 Status: UNCONFIRMED Severity: normal Priority: P3 Component: bootstrap AssignedTo: unassigned at gcc dot gnu dot org ReportedBy: ro at gcc dot gnu dot org GCC build triplet: sparc-sun-solaris2.11 GCC host triplet: sparc-sun-solaris2.11 GCC target triplet: sparc-sun-solaris2.11 http://gcc.gnu.org/bugzilla/show_bug.cgi?id=40788