[Bug tree-optimization/84486] [7 Regression] code hoisting removes alignment assumption

[rguenth at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=84486

Richard Biener  changed:

   What|Removed |Added

 Status|ASSIGNED|RESOLVED
 Resolution|--- |FIXED

--- Comment #7 from Richard Biener  ---
Fixed.

[Bug tree-optimization/84486] [7 Regression] code hoisting removes alignment assumption

[rguenth at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=84486

--- Comment #6 from Richard Biener  ---
Author: rguenth
Date: Tue Mar  6 10:01:52 2018
New Revision: 258274

URL: https://gcc.gnu.org/viewcvs?rev=258274&root=gcc&view=rev
Log:
2018-03-06  Richard Biener  

Backport from mainline
2018-03-05  Richard Biener  

PR tree-optimization/84486
* tree-ssa-pre.c (create_expression_by_pieces): Remove dead code.
When inserting a __builtin_assume_aligned call set the LHS
SSA name alignment info accordingly.

2018-02-28  Richard Biener  

PR middle-end/84607
* genmatch.c (capture_info::walk_match): Do not mark
captured expressions without operands as expr_p given
they act more like predicates and should be subject to
"lost tail" side-effect preserving.

* gcc.dg/pr84607.c: New testcase.

Added:
branches/gcc-7-branch/gcc/testsuite/gcc.dg/pr84607.c
Modified:
branches/gcc-7-branch/gcc/ChangeLog
branches/gcc-7-branch/gcc/genmatch.c
branches/gcc-7-branch/gcc/testsuite/ChangeLog
branches/gcc-7-branch/gcc/tree-ssa-pre.c

[Bug tree-optimization/84486] [7 Regression] code hoisting removes alignment assumption

[rguenth at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=84486

Richard Biener  changed:

   What|Removed |Added

  Known to work||8.0
Summary|[7/8 Regression] code   |[7 Regression] code
   |hoisting removes alignment  |hoisting removes alignment
   |assumption  |assumption
  Known to fail||7.3.0

--- Comment #5 from Richard Biener  ---
Fixed on trunk sofar.  Will backport with next batch.