Broken optimiser?

Hi, We are encountering unexpected behaviour following an increase in optimisation levels from 8 to 9. The problem we are seeing centres around an XDATA variable assignment (vt_safety_u = B0_SAFETY...
code optimisation

what is meant by code optimization?how is it carried out?
Disappointing optimisation...

Hi, I'm doing a comparison between BL51 and Lx51 to determine the code space savings- I'm a bit suprised to see that for the same project, Lx51 yields a code reduction of only 0.6%- I've enabled the...
typedef & optimisation

In the book "TCP/IP Lean" [1], the author states: "I have used #define in preference to typedef because compilers use better optimisation strategies for their native data types." Is this true of...
Compiler optimisation

Hello, 1.when i use printf with no var_args then the compiler should call puts instead of printf. ex1: #include <REGX51.H> #include <stdio.h> void main(void) { printf("This must call puts...