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).