https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70526
Richard Biener <rguenth at gcc dot gnu.org> changed: What |Removed |Added ---------------------------------------------------------------------------- Priority|P3 |P1 Component|rtl-optimization |tree-optimization Target Milestone|--- |6.0 Summary|GCC 6 miscompiles Firefox |[6 Regression] GCC 6 |JIT compiler |miscompiles Firefox JIT | |compiler --- Comment #7 from Richard Biener <rguenth at gcc dot gnu.org> --- The issue is actually older so I'll backport this with my next batch(es).