The following testcase causes an ICE on i686-pc-linux-gnu when compiled with "-O -march=pentium4 -ftree-vectorize":
=============================== double d[3]; void foo() { int i; for (i=0; i<3; ++i) d[i] = 0; } =============================== bug.c: In function 'foo': bug.c:4: internal compiler error: in get_bb_copy, at cfg.c:1078 Please submit a full bug report, [etc.] The regression was introduced yesterday (2005-06-15). -- Summary: [4.1 regression] ICE with -ftree-vectorize 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=22088