11.6. Debugging Optimized Programs
An optimized program no longer has an exactly matching relationship between the programmer's sequence of instructions in assembly language or a high-level language and the generated sequence of machine instructions. Accordingly, the recommended practice is to inhibit or sharply curtail optimizations when using a debugger, in order to avoid confusion.
In rare instances, an unoptimized program may appear to work correctly, yet the optimized version seems to operate peculiarly. Some debugger capabilities can still be of use, such as stopping on entry to a routine or perhaps watching for changes to a variable. Optimized instruction sequences may keep variables from a high-level language in registers and update them ...
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