Displaying 2 results from an estimated 2 matches for "f6njdg".
2020 Feb 03
3
Questions about jump threading optimization and what we can do
Hm. I assumed that JumpThreading would be the primary factor in optimizing
code like this. Guess not. I'll need to look into SimplifyCFG to see what
prevents it from doing the same thing to the other loop:
https://godbolt.org/z/F6NjdG
On Mon, Feb 3, 2020 at 3:09 PM Michael Kruse <llvmdev at meinersbur.de> wrote:
> I assumed the LLVM-IR behind the godbolt link represented the C code
> you used before.
>
> SimplifyCFG actually helps the loop being removed:
> https://godbolt.org/z/5v7SXh
>
> But this do...
2020 Feb 03
2
Questions about jump threading optimization and what we can do
Wait, you used the same example as I did. I'm confused then; if ScEv is
having troubles but it still gets optimized away somewhere, what do you
think is doing it?
On Mon, Feb 3, 2020 at 2:16 PM Karl Rehm <klrehm123 at gmail.com> wrote:
> Ah, I see. I think there's something else going on here too, though.
> https://godbolt.org/z/dCqdvv is optimized away but ScEv doesn't