The following invalid code snippet triggers an ICE since GCC 3.4.5 / 4.0.2:
================================================= void foo(int __attribute__((vector_size(8))) i) { switch (i) {} } ================================================= bug.cc: In function 'void foo(int __vector__)': bug.cc:3: internal compiler error: in perform_integral_promotions, at cp/typeck.c:1588 Please submit a full bug report, [etc.] -- Summary: [4.0/4.1/4.2/4.3 regression] ICE with vector in switch condition Product: gcc Version: 4.3.0 Status: UNCONFIRMED Keywords: ice-on-invalid-code, 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=29734