Performing constant calculations depending on template parameters causes an
internal compiler error. Compile the code below with g++ -c foo.cpp to
reproduce.
template <class T> struct A {
static const unsigned a = (sizeof(T[3])-sizeof(T[2]));
unsigned foo(unsigned b) { return a*b; }
};
I do not get the ICE when compiling the code with my distribution compiler
(Ubuntu Dapper gcc 4.0.3), only with my self-compiled 4.0.3 that has checking
enabled. I only noticed this by accident when I build a checking compiler to
hunt a different gcc bug.
My configuration options as shown by g++ -v (mostly copied from the
distribution compiler):
../configure --enable-languages=c,c++ --prefix=/home/tneumann/gcc4
--enable-shared --with-system-zlib --without-included-gettext
--enable-threads=posix --enable-nls --enable-__cxa_atexit --enable-clocale=gnu
--enable-libstdcxx-debug --disable-werror --enable-checking --disable-multilib
x86_64-linux-gnu
--
Summary: ICE on dependent const folding
Product: gcc
Version: 4.0.3
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c++
AssignedTo: unassigned at gcc dot gnu dot org
ReportedBy: tneumann at pi3 dot informatik dot uni-mannheim dot de
GCC host triplet: x86_64-linux-gnu
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=27465
