https://gcc.gnu.org/bugzilla/show_bug.cgi?id=95118
Sergei Trofimovich <slyfox at inbox dot ru> changed:
What |Removed |Added
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CC| |rguenth at gcc dot gnu.org
--- Comment #3 from Sergei Trofimovich <slyfox at inbox dot ru> ---
Bisect points to an old revision. Might be a coincidence?
38988cbf9ebaa96fb1e891a46aa063f0c298a2e2 is the first bad commit
commit 38988cbf9ebaa96fb1e891a46aa063f0c298a2e2
Author: Richard Biener <rguent...@suse.de>
Date: Mon Jul 8 07:09:24 2019 +0000
re PR tree-optimization/83518 (Missing optimization: useless instructions
should be dropped)
2019-07-08 Richard Biener <rguent...@suse.de>
PR tree-optimization/83518
* tree-ssa-sccvn.c: Include splay-tree.h.
(struct pd_range, struct pd_data): New.
(struct vn_walk_cb_data): Add data to track partial definitions.
(vn_walk_cb_data::~vn_walk_cb_data): New.
(vn_walk_cb_data::push_partial_def): New.
(pd_tree_alloc, pd_tree_dealloc, pd_range_compare): New.
(vn_reference_lookup_2): When partial defs are registered give up.
(vn_reference_lookup_3): Track partial defs for memset and
constructor zeroing and for defs from constants.
* gcc.dg/tree-ssa/ssa-fre-73.c: New testcase.
* gcc.dg/tree-ssa/ssa-fre-74.c: Likewise.
* gcc.dg/tree-ssa/ssa-fre-75.c: Likewise.
* gcc.dg/tree-ssa/ssa-fre-76.c: Likewise.
* g++.dg/tree-ssa/pr83518.C: Likewise.
From-SVN: r273194
gcc/ChangeLog | 13 +
gcc/testsuite/ChangeLog | 9 +
gcc/testsuite/g++.dg/tree-ssa/pr83518.C | 27 ++
gcc/testsuite/gcc.dg/tree-ssa/ssa-fre-73.c | 14 ++
gcc/testsuite/gcc.dg/tree-ssa/ssa-fre-74.c | 16 ++
gcc/testsuite/gcc.dg/tree-ssa/ssa-fre-75.c | 34 +++
gcc/testsuite/gcc.dg/tree-ssa/ssa-fre-76.c | 16 ++
gcc/tree-ssa-sccvn.c | 389 +++++++++++++++++++++++++----
8 files changed, 469 insertions(+), 49 deletions(-)
create mode 100644 gcc/testsuite/g++.dg/tree-ssa/pr83518.C
create mode 100644 gcc/testsuite/gcc.dg/tree-ssa/ssa-fre-73.c
create mode 100644 gcc/testsuite/gcc.dg/tree-ssa/ssa-fre-74.c
create mode 100644 gcc/testsuite/gcc.dg/tree-ssa/ssa-fre-75.c
create mode 100644 gcc/testsuite/gcc.dg/tree-ssa/ssa-fre-76.c
