https://gcc.gnu.org/bugzilla/show_bug.cgi?id=66930
--- Comment #9 from John Paul Adrian Glaubitz <glaubitz at physik dot fu-berlin.de> --- (In reply to Kazumoto Kojima from comment #8) > (In reply to John Paul Adrian Glaubitz from comment #7) > > What do you mean? Using -O1 will trigger all kinds of bugs? Or is it rather > > about PR target/66358? > > Just my 2 cents. Even on the primary targets, bootstrap with other > than '-g -O2' are not so well tested. Ah, I didn't know that. Really interesting fact! > Most packages are built with -O2, aren't they? They are, true. > After all, -O1 should work but not safer than -O2, > IMO. O2 does many optimizations, and some of them might cause bug. > OTOH, some of them simplify the intermediate code. With -O1, we could > see highly complex intermediate code in some cases and they might cause > problem. We have just seen an example in this PR. I agree and, as I said, I already asked Matthias to revert to -O2. Let's see how far we'll get this time. My board is still building. Adrian
