On 06/10/2010 17:20, Andrew Haley wrote:
On 10/06/2010 04:11 PM, Mathieu Lacage wrote:
Is there a way to ask gcc to force a specific variable to be stored on
the stack ?
Take its address.
Taking a variable's address on it's own is not enough. If the compiler
can figure out that you are not using the address, or that it can find a
different way to get the same effect, then the variable will stay in a
register (or be optimised away altogether, if possible).
Of course, there are not many reasons why you would /want/ to force a
variable onto the stack unless it was because you want to be able to
take its address...
(other than write a bit of inline asm ?)
Nothing wrong with that:
asm volatile ("" ::"a"&foo);
Andrew.
"volatile" is always the key to forcing the compiler to do things.
