https://gcc.gnu.org/bugzilla/show_bug.cgi?id=83518
--- Comment #10 from Richard Biener <rguenth at gcc dot gnu.org> --- Author: rguenth Date: Mon Jul 8 07:09:24 2019 New Revision: 273194 URL: https://gcc.gnu.org/viewcvs?rev=273194&root=gcc&view=rev Log: 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. Added: trunk/gcc/testsuite/g++.dg/tree-ssa/pr83518.C trunk/gcc/testsuite/gcc.dg/tree-ssa/ssa-fre-73.c trunk/gcc/testsuite/gcc.dg/tree-ssa/ssa-fre-74.c trunk/gcc/testsuite/gcc.dg/tree-ssa/ssa-fre-75.c trunk/gcc/testsuite/gcc.dg/tree-ssa/ssa-fre-76.c Modified: trunk/gcc/ChangeLog trunk/gcc/testsuite/ChangeLog trunk/gcc/tree-ssa-sccvn.c
