Yet another failure with -ftree-vectorize on mainline (compile with "-ftree-vectorize -msse2 -O" on i686-pc-linux-gnu):
====================================== double x[3]; void foo() { int i; for (i=0; i<3; ++i) x[i]=0; for (i=0; i<2; ++i) ; } ====================================== bug.c: In function 'foo': bug.c:4: internal compiler error: in var_ann, at tree-flow-inline.h:115 Please submit a full bug report, [etc.] -- Summary: [4.1 regression] ICE with -ftree-vectorize in var_ann, at tree-flow-inline.h:115 Product: gcc Version: 4.1.0 Status: UNCONFIRMED Keywords: ice-on-valid-code, monitored Severity: normal Priority: P2 Component: tree-optimization AssignedTo: unassigned at gcc dot gnu dot org ReportedBy: reichelt at gcc dot gnu dot org CC: gcc-bugs at gcc dot gnu dot org http://gcc.gnu.org/bugzilla/show_bug.cgi?id=22506