Bernd Jendrissek wrote:
On Tue, May 13, 2008 at 9:13 PM, Nick Spence <nick.spence@xxxxxxxxxxxxx> wrote:addr = 0; for (i = 0; i < 16; i++) *(addr++) = 0;I got a conditional jump by replacing your initialization of addr with: asm("" : "=g" (addr) : "0" (0)); That should make the NULL-ness of addr invisible to GCC.
Thanks - I ended up loading the value from a DRAM base address register, which effectively hid it from the optimizer.
I still don't like the silent corruption of code by the optimizer, and would like to see an optimizer warning message added.
