[Bug lto/83201] [7/8 Regression] SPEC CPU2017 505.mcf_r produces incorrect output when built with -flto and FDO
marxin at gcc dot gnu.org
gcc-bugzilla@gcc.gnu.org
Tue Dec 19 12:09:00 GMT 2017
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=83201
Martin Liška <marxin at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |rguenth at gcc dot gnu.org
--- Comment #8 from Martin Liška <marxin at gcc dot gnu.org> ---
But my bisection script points to r217827 as first bad revision:
2014-11-20 Richard Biener <rguenther@suse.de>
PR tree-optimization/63677
* tree-ssa-dom.c: Include gimplify.h for unshare_expr.
(avail_exprs_stack): Make a vector of pairs.
(struct hash_expr_elt): Replace stmt member with vop member.
(expr_elt_hasher::equal): Simplify.
(initialize_hash_element): Adjust.
(initialize_hash_element_from_expr): Likewise.
(dom_opt_dom_walker::thread_across_edge): Likewise.
(record_cond): Likewise.
(dom_opt_dom_walker::before_dom_children): Likewise.
(print_expr_hash_elt): Likewise.
(remove_local_expressions_from_table): Restore previous state
if requested.
(record_equivalences_from_stmt): Record &x + CST as constant
&MEM[&x, CST] for further propagation.
(vuse_eq): New function.
(lookup_avail_expr): For loads use the alias oracle to see
whether a candidate from the expr hash is usable.
(avail_expr_hash): Do not hash VUSEs.
* gcc.dg/tree-ssa/ssa-dom-cse-2.c: New testcase.
* gcc.dg/tree-ssa/ssa-dom-cse-3.c: Likewise.
More information about the Gcc-bugs
mailing list