https://gcc.gnu.org/bugzilla/show_bug.cgi?id=52339
--- Comment #11 from Andrew Pinski ---
(In reply to Andrew Pinski from comment #10)
> (In reply to Jakub Jelinek from comment #7)
> > Created attachment 54994 [details]
> > gcc14-pr52339.patch
> >
> > Untested fix.
>
> I think this might fix
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=52339
--- Comment #10 from Andrew Pinski ---
(In reply to Jakub Jelinek from comment #7)
> Created attachment 54994 [details]
> gcc14-pr52339.patch
>
> Untested fix.
I think this might fix PR 108789 too ...
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=52339
--- Comment #9 from Jason Merrill ---
(In reply to Jakub Jelinek from comment #5)
> in main it doesn't, as the nop is stripped and the COMPONENT_REF is
> TREE_READONLY and !TREE_SIDE_EFFECTS.
> tree.cc (save_expr) documents that:
>Constants,
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=52339
--- Comment #8 from joseph at codesourcery dot com ---
I think it's valid C99, yes: the VLA size should be evaluated exactly
once, when the declaration is passed in the order of execution.
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=52339
--- Comment #7 from Jakub Jelinek ---
Created attachment 54994
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=54994=edit
gcc14-pr52339.patch
Untested fix.
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=52339
--- Comment #6 from Jakub Jelinek ---
Though, walking the whole tree to find them in tree_invariant_p_1 would result
in bad compile time complexity, because e.g. skip_simple_arithmetic can call
that on both operands of binary expression etc.
So,
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=52339
Jakub Jelinek changed:
What|Removed |Added
CC||jakub at gcc dot gnu.org,
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=52339
Jonathan Wakely changed:
What|Removed |Added
Known to fail||13.1.0, 14.0, 4.1.0, 4.6.2
Last
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=52339
Jonathan Wakely changed:
What|Removed |Added
CC||gjl at gcc dot gnu.org
--- Comment #3
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=52339
Jonathan Wakely redi at gcc dot gnu.org changed:
What|Removed |Added
Keywords||wrong-code
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=52339
--- Comment #2 from Jonathan Wakely redi at gcc dot gnu.org 2012-02-22
12:48:04 UTC ---
b = b.0;
a = b-a;
D.2361 = a-b;
if (D.2361 != 0B) goto D.2362; else goto D.2363;
D.2362:
D.2364 = a-b;
B::~B (D.2364);
D.2365
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