[coldfire-gnu-discuss] Optimizing problem

[Nathan Sidwell]

DMS Tech, John wrote:
> When I use the optimize option –O1 I have a problem that a small delay 
> loop, used in a boot-loader program, gets optimized out of the code. 
> Only the function call stays but the actual while loop is removed. Is 
> there any compiler option to make sure this loop stays intact or a 
> ‘__attribute__’, which will make sure this function is not optimized?

for (i = 0; i != limit; i++)
   __asm__ volatile ("");

The compiler will not optimize this loop away, and the body of the loop will be 
an empty asm.

nathan

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