[Bug tree-optimization/101009] [10/11 Regression] wrong code with "-O3 -fno-tree-sra"

2021-06-16 Thread cvs-commit at gcc dot gnu.org via Gcc-bugs 
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=101009

--- Comment #13 from CVS Commits  ---
The releases/gcc-11 branch has been updated by Richard Biener
:

https://gcc.gnu.org/g:83758b7b67629ef4492a51e5a255f0070c07574a

commit r11-8581-g83758b7b67629ef4492a51e5a255f0070c07574a
Author: Richard Biener 
Date:   Fri Jun 11 09:33:58 2021 +0200

middle-end/101009 - fix distance vector recording

This fixes recording of distance vectors in case the DDR has just
constant equal indexes.  In that case we expect distance vectors
with zero distances to be recorded which is what was done when
any distance was computed for affine indexes.

2021-06-11  Richard Biener  

PR middle-end/101009
* tree-data-ref.c (build_classic_dist_vector_1): Make sure
to set *init_b to true when we encounter a constant equal
index pair.
(compute_affine_dependence): Also dump the actual DR_REF.

* gcc.dg/torture/pr101009.c: New testcase.

(cherry picked from commit 336c41dbcb21740f8964021e157bc69ca547059b)

[Bug tree-optimization/101009] [10/11 Regression] wrong code with "-O3 -fno-tree-sra"

2021-06-11 Thread rguenth at gcc dot gnu.org via Gcc-bugs 
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=101009

Richard Biener  changed:

   What|Removed |Added

  Known to work||12.0
Summary|[10/11/12 Regression] wrong |[10/11 Regression] wrong
   |code with "-O3  |code with "-O3
   |-fno-tree-sra"  |-fno-tree-sra"

--- Comment #12 from Richard Biener  ---
Fixed on trunk sofar - the underlying issue is latent everywhere and not really
a regression.