http://gcc.gnu.org/bugzilla/show_bug.cgi?id=49799
--- Comment #6 from Carrot <carrot at google dot com> 2011-07-25 09:25:22 UTC --- (In reply to comment #5) > We should never generate a shift of -1. Instead the code that does that > should > return (clobber const_int 0). I'm afraid this method may impact gcc too much. I added the following to the source code K[1] = K[1] << -1; gcc only generates a warning auto_corr_to_refl_coef.i:19:5: warning: left shift count is negative [enabled by default] and generates following code ldrsh r1, [r0, #2] mvn ip, #0 mov r1, r1, asl ip strh r1, [r0, #2] What do you think?
