On Tue, Jan 27, 2009 at 9:33 AM, Paolo Bonzini <bonz...@gnu.org> wrote: > James Dennett wrote: >> On Mon, Jan 26, 2009 at 11:52 PM, <zol...@bendor.com.au> wrote: >>> I was debugging a function and by inserting the debug statement crashed >>> the system. Some investigation revealed that gcc 4.3.2 arm-eabi (compiled >>> from sources) with -O2 under some circumstances assumes that if a pointer >>> is dereferenced, it can not be NULL therefore explicite tests against >>> NULL can be later eliminated. >> >> That's an optimization permitted by the language standard, but >> possibly unhelpful on your particular target. > > Not really, he's just using the sloppiness allowed by MMU-less targets, > but he doesn't care about the value passed to Debug if tst == NULL. > > However, -fno-delete-null-pointer-checks will do.
Not for PTA though ;) Richard.
