CSiBe builds broke because of this change here to fix PR42879. http://gcc.gnu.org/ml/gcc-cvs/2010-05/msg00263.html
Attached is a reduced testcase that shows the problem. The problem appears to be due to incorrect generation of the tst instruction as a result of the pattern added where the tst instruction appears to be generating a tst with 32767 which is an invalid immediate for the tst instruction in Thumb2 state. Carrot, can you look at this further ? Ramana -- Summary: Invalid instruction generation in Thumb2 for tst instruction. Product: gcc Version: 4.5.0 Status: UNCONFIRMED Keywords: wrong-code Severity: normal Priority: P3 Component: target AssignedTo: unassigned at gcc dot gnu dot org ReportedBy: ramana at gcc dot gnu dot org GCC host triplet: X86_64-linux-gnu GCC target triplet: arm-eabi http://gcc.gnu.org/bugzilla/show_bug.cgi?id=44227