http://gcc.gnu.org/bugzilla/show_bug.cgi?id=51023
--- Comment #5 from Jakub Jelinek <jakub at gcc dot gnu.org> 2011-11-10 15:36:52 UTC --- Author: jakub Date: Thu Nov 10 15:36:48 2011 New Revision: 181257 URL: http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=181257 Log: PR rtl-optimization/51023 * combine.c (simplify_comparison) <case SIGN_EXTEND>: Don't use val_signbit_known_clear_p for signed comparison narrowing optimization. Don't check for non-VOIDmode, use HWI_COMPUTABLE_MODE_P macro. <case ZERO_EXTEND>: Don't check for non-VOIDmode. Optimize even when const_op is equal to GET_MODE_MASK (mode), don't optimize if const_op is negative. * gcc.c-torture/execute/pr51023.c: New test. Added: trunk/gcc/testsuite/gcc.c-torture/execute/pr51023.c Modified: trunk/gcc/ChangeLog trunk/gcc/combine.c trunk/gcc/testsuite/ChangeLog
