[Bug middle-end/70526] [5/6 Regression] GCC 6 miscompiles Firefox JIT compiler

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70526 --- Comment #34 from Vittorio Zecca --- The Intel icpc compiler complains that in the reduced testcase ansi-alias rules are violated. icpc gccerr45.C -Wstrict-aliasing gccerr45.C(77) (col. 32): warning #2102: violation of ansi-alias rules This

[Bug middle-end/70526] [5/6 Regression] GCC 6 miscompiles Firefox JIT compiler

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70526 --- Comment #33 from rguenther at suse dot de --- On May 17, 2016 8:55:26 PM GMT+02:00, guido at trentalancia dot net wrote: >https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70526 > >guido at trentalancia dot net changed:

[Bug middle-end/70526] [5/6 Regression] GCC 6 miscompiles Firefox JIT compiler

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70526 guido at trentalancia dot net changed: What|Removed |Added CC||guido at trentalancia dot

[Bug middle-end/70526] [5/6 Regression] GCC 6 miscompiles Firefox JIT compiler

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70526 --- Comment #31 from Vittorio Zecca --- It seems the following is related to the FF compilation issue: The program runs differently depending on the optimization level. With gcc 5.3.0 runs same regardless of the optimization level. // g++

[Bug middle-end/70526] [5/6 Regression] GCC 6 miscompiles Firefox JIT compiler

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70526 --- Comment #30 from rguenther at suse dot de --- On Tue, 17 May 2016, zeccav at gmail dot com wrote: > https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70526 > > Vittorio Zecca changed: > >What|Removed |Added

[Bug middle-end/70526] [5/6 Regression] GCC 6 miscompiles Firefox JIT compiler

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70526 Vittorio Zecca changed: What|Removed |Added CC||zeccav at gmail dot com --- Comment

[Bug middle-end/70526] [5/6 Regression] GCC 6 miscompiles Firefox JIT compiler

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70526 --- Comment #28 from Jonathan Wakely --- (As I mentioned, std::aligned_storage takes a size as its template argument, not a type, so it can't put requirements on a type T, since there is no type T :)

[Bug middle-end/70526] [5/6 Regression] GCC 6 miscompiles Firefox JIT compiler

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70526 --- Comment #27 from Jonathan Wakely --- (In reply to rguent...@suse.de from comment #26) > std::aligned_storage has the requirement of a POD type T. So I > wondered about whether the intent was to make copying it by plain > assignment

[Bug middle-end/70526] [5/6 Regression] GCC 6 miscompiles Firefox JIT compiler

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70526 --- Comment #26 from rguenther at suse dot de --- On Tue, 3 May 2016, redi at gcc dot gnu.org wrote: > https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70526 > > --- Comment #25 from Jonathan Wakely --- > std::aligned_storage has no equivalent of

[Bug middle-end/70526] [5/6 Regression] GCC 6 miscompiles Firefox JIT compiler

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70526 --- Comment #25 from Jonathan Wakely --- std::aligned_storage has no equivalent of the addr() member function that would need adjusting, it's just the union U part of the AlignedStorage2 type in comment 23, where sizeof(T) is a template

[Bug middle-end/70526] [5/6 Regression] GCC 6 miscompiles Firefox JIT compiler

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70526 --- Comment #23 from Richard Biener --- A fix for your testcase would also be to do template struct AlignedStorage2 { union U { char mBytes[sizeof(T)]; uint64_t mDummy; } u; typedef T _T __attribute__((may_alias)); const _T*

[Bug middle-end/70526] [5/6 Regression] GCC 6 miscompiles Firefox JIT compiler

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70526 Richard Biener changed: What|Removed |Added CC||jwakely.gcc at gmail dot com ---

[Bug middle-end/70526] [5/6 Regression] GCC 6 miscompiles Firefox JIT compiler

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70526 Richard Biener changed: What|Removed |Added Status|ASSIGNED|RESOLVED