From 302d22f6ec4706459e12b6ca93e4ac4b5c3590e7 Mon Sep 17 00:00:00 2001 From: Richard Biener Date: Thu, 27 Feb 2025 14:51:44 +0100 Subject: [PATCH] tree-optimization/119044 - predcom fails to preserve alias info Predictive commoning fails to preserve alias info for the refs it creates. The following adds this to see whether it fixes the observed regression in 436.cactusADM after r15-7665. PR tree-optimization/119044 * tree-predcom.cc (ref_at_iteration): Copy alias info from the original ref. --- gcc/tree-predcom.cc | 2 ++ 1 file changed, 2 insertions(+) diff --git a/gcc/tree-predcom.cc b/gcc/tree-predcom.cc index d45aa3857b9..509d112a0a0 100644 --- a/gcc/tree-predcom.cc +++ b/gcc/tree-predcom.cc @@ -234,6 +234,7 @@ along with GCC; see the file COPYING3. If not see #include "tree-affine.h" #include "builtins.h" #include "opts.h" +#include "tree-ssa-address.h" /* The maximum number of iterations between the considered memory references. */ @@ -1824,6 +1825,7 @@ ref_at_iteration (data_reference_p dr, int iter, tree type = build_aligned_type (TREE_TYPE (ref), get_object_alignment (ref)); ref = build2 (MEM_REF, type, addr, alias_ptr); + copy_ref_info (ref, DR_REF (dr)); if (ref_type) ref = build3 (ref_code, ref_type, ref, ref_op1, ref_op2); return ref; -- 2.47.2