Hi Hideyuki Tokuhisa,
You can try : _attribute__((optimize("O4")))
#if ((defined __GNUC__) && (CPU_CORE == ARM_CORTEX_M))
#define SIZE_OPTIMIZATION __attribute__((optimize("O4")))
#else
#define SIZE_OPTIMIZATION
#endif
void SIZE_OPTIMIZATION testFun(void)
{
uint16_t i=0,j=0;
for(i=0;i<100;i++)
{
j=i+1;
PRINTF("j=%d",&j);
}
}
Wish it helps you!
If you still have questions about it, please kindly let me know.
Kerry
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