On 07/24/2018 09:06 PM, Alexandre Oliva wrote: > On Jul 24, 2018, Tom de Vries <tdevr...@suse.de> wrote: > >> There's a design principle in GCC that code generation and debug generation >> are independent. This guarantees that if you're encountering a problem in an >> application without debug info, you can recompile it with -g and be certain >> that you can reproduce the same problem, and use the debug info to debug the >> problem. This invariant is enforced by bootstrap-debug. The fdebug-nops >> breaks this invariant > > I thought of a way to not break it: enable the debug info generation > machinery, including VTA and SFN, but discard those only at the very end > if -g is not enabled. The downside is that it would likely slow -Og > down significantly, but who uses it without -g anyway?
I thought of the same. I've submitted a patch here that uses SFN: https://gcc.gnu.org/ml/gcc-patches/2018-07/msg01391.html . VTA is not needed AFAIU. Thanks, - Tom
