[Bug tree-optimization/101895] [11 Regression] SLP Vectorizer change pushes VEC_PERM_EXPR into bad location spoiling further optimization opportunities

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

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=101895

Richard Biener  changed:

   What|Removed |Added

   Target Milestone|11.5|12.0
 Resolution|--- |FIXED
  Known to fail||11.5.0
 Status|NEW |RESOLVED

--- Comment #13 from Richard Biener  ---
Fixed in GCC 12.

[Bug tree-optimization/101895] [11 Regression] SLP Vectorizer change pushes VEC_PERM_EXPR into bad location spoiling further optimization opportunities

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

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=101895

Jakub Jelinek  changed:

   What|Removed |Added

   Target Milestone|11.4|11.5

--- Comment #12 from Jakub Jelinek  ---
GCC 11.4 is being released, retargeting bugs to GCC 11.5.

[Bug tree-optimization/101895] [11 Regression] SLP Vectorizer change pushes VEC_PERM_EXPR into bad location spoiling further optimization opportunities

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

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=101895

Richard Biener  changed:

   What|Removed |Added

   Target Milestone|11.3|11.4

--- Comment #11 from Richard Biener  ---
GCC 11.3 is being released, retargeting bugs to GCC 11.4.

[Bug tree-optimization/101895] [11 Regression] SLP Vectorizer change pushes VEC_PERM_EXPR into bad location spoiling further optimization opportunities

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

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=101895

--- Comment #10 from Jeffrey A. Law  ---
And just an FYI.  As expected this resolves the regression on our internal
target.  Thanks Roger!

[Bug tree-optimization/101895] [11 Regression] SLP Vectorizer change pushes VEC_PERM_EXPR into bad location spoiling further optimization opportunities

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

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=101895

--- Comment #9 from Jeffrey A. Law  ---
Yea, no need to backport this.

[Bug tree-optimization/101895] [11 Regression] SLP Vectorizer change pushes VEC_PERM_EXPR into bad location spoiling further optimization opportunities

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

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=101895

Richard Biener  changed:

   What|Removed |Added

   Target Milestone|12.0|11.3
Summary|[11/12 Regression] SLP  |[11 Regression] SLP
   |Vectorizer change pushes|Vectorizer change pushes
   |VEC_PERM_EXPR into bad  |VEC_PERM_EXPR into bad
   |location spoiling further   |location spoiling further
   |optimization opportunities  |optimization opportunities
  Known to work||12.0
 Resolution|FIXED   |---
 Status|RESOLVED|NEW

--- Comment #8 from Richard Biener  ---
Fixed on trunk, keeping for reference purposes (backporting is not intended). 
There's also still the possibility to improve how the vectorizer handles this
instead of fixing up after the fact (but that's for the future).