[Bug middle-end/65855] SCEV / SCCP missing optimization: triangular numbers

[roger at nextmovesoftware dot com via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=65855

Roger Sayle  changed:

   What|Removed |Added

 CC||roger at nextmovesoftware dot 
com

--- Comment #15 from Roger Sayle  ---
For the record, I proposed a patch for PR65855 back in 2022,
https://gcc.gnu.org/pipermail/gcc-patches/2022-February/590579.html
but this solution needed some refinement, and wasn't suitable given
the stage back then.

[Bug middle-end/65855] SCEV / SCCP missing optimization: triangular numbers

[amonakov at gcc dot gnu.org via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=65855

Alexander Monakov  changed:

   What|Removed |Added

 CC||uecker at gcc dot gnu.org

--- Comment #14 from Alexander Monakov  ---
*** Bug 123291 has been marked as a duplicate of this bug. ***

[Bug middle-end/65855] SCEV / SCCP missing optimization: triangular numbers

[pinskia at gcc dot gnu.org via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=65855

Andrew Pinski  changed:

   What|Removed |Added

 CC||goon.pri.low at gmail dot com

--- Comment #13 from Andrew Pinski  ---
*** Bug 112663 has been marked as a duplicate of this bug. ***

[Bug middle-end/65855] SCEV / SCCP missing optimization: triangular numbers

[pinskia at gcc dot gnu.org via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=65855

Andrew Pinski  changed:

   What|Removed |Added

 CC||gabravier at gmail dot com

--- Comment #12 from Andrew Pinski  ---
*** Bug 98960 has been marked as a duplicate of this bug. ***

[Bug middle-end/65855] SCEV / SCCP missing optimization: triangular numbers

[pinskia at gcc dot gnu.org via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=65855

Andrew Pinski  changed:

   What|Removed |Added

 CC||j...@jak-linux.org

--- Comment #11 from Andrew Pinski  ---
*** Bug 46186 has been marked as a duplicate of this bug. ***

[Bug middle-end/65855] SCEV / SCCP missing optimization: triangular numbers

[pinskia at gcc dot gnu.org via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=65855

Andrew Pinski  changed:

   What|Removed |Added

 CC||dmalcolm at gcc dot gnu.org

--- Comment #10 from Andrew Pinski  ---
*** Bug 82519 has been marked as a duplicate of this bug. ***

[Bug middle-end/65855] SCEV / SCCP missing optimization: triangular numbers

[amonakov at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=65855

Alexander Monakov  changed:

   What|Removed |Added

 CC||giuliano.belinassi at usp dot 
br

--- Comment #9 from Alexander Monakov  ---
*** Bug 88186 has been marked as a duplicate of this bug. ***

[Bug middle-end/65855] SCEV / SCCP missing optimization: triangular numbers

[pinskia at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=65855

Andrew Pinski  changed:

   What|Removed |Added

 CC||nightstrike at gmail dot com

--- Comment #8 from Andrew Pinski  ---
*** Bug 86923 has been marked as a duplicate of this bug. ***

[Bug middle-end/65855] SCEV / SCCP missing optimization: triangular numbers

[rguenth at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=65855

Richard Biener  changed:

   What|Removed |Added

Summary|missing optimization:   |SCEV / SCCP missing
   |triangular numbers  |optimization: triangular
   ||numbers

--- Comment #7 from Richard Biener  ---
From the duplicate a related testcase:

int square(int x) {
  int result = 0;
  for (int i = 0; i < x; ++i)
result += x;
  return result;
}

is not optimized into return x * x; while llvm can do that.