Question on Dwarf2 unwind info and optimized code

[Richard Henderson]

On Tue, Oct 25, 2005 at 10:08:59AM +0200, Christophe LYON wrote:
> On occasions, I wonder whether it wouldn't make sense to generate
> different infos in debug_frame and eh_frame: IIUC, GCC tries to
> 'compress' the debug frame info by generating few advance_loc
> instructions (eg only 1 for the whole prologue), which makes sense in
> the C++ EH stack unwinding context, but my cause problems in a debugger.

No it doesn't.  Look closer at the optimization.  It compresses
the advances only when the original register is still unmodified.


r~