On Thu, May 9, 2019 at 12:28 PM Steven Rostedt <rost...@goodmis.org> wrote:
>
> But it probably would probably still be good to know why this fixes the
> issues you see.
Looks like a compiler bug, plain and simple.
The simplified case really simplifies a lot for the internal IR, and
has a single conditional that then increments a constant location and
returns a constant value. That means that any branch following code in
the compiler has a much simpler setup, and doesn't need to try to
follow any chain of condirional branches with the same conditional to
generate sane code.
But the code generation problem is clearly a compiler bug, although
I'd not be surprised if it's also triggered by whatever horrid things
ASAN does internally to gcc state.
Linus
