A broken diagnostic is issued for the following testcase since GCC 4.0.2: ===================================================== int v __attribute((vector_size(8)));
bool b = !(v - v); ===================================================== bug.cc:3: error: could not convert '#'vector_cst' not supported by dump_expr#<expression error>' to 'bool' bug.cc:3: error: in argument to unary ! -- Summary: [4.1/4.2/4.3 regression] Broken diagnostic: 'vector_cst' not supported by dump_expr Product: gcc Version: 4.3.0 Status: UNCONFIRMED Keywords: diagnostic, monitored Severity: normal Priority: P3 Component: c++ AssignedTo: unassigned at gcc dot gnu dot org ReportedBy: reichelt at gcc dot gnu dot org http://gcc.gnu.org/bugzilla/show_bug.cgi?id=34918