From b75f996e846d079251f3a6134617f0405c3ed535 Mon Sep 17 00:00:00 2001 From: Richard Biener Date: Thu, 31 Mar 2022 08:20:43 +0200 Subject: [PATCH] rtl-optimization/105091 - wrong DSE with missed TREE_ADDRESSABLE When expanding an aggregate copy into a memcpy call RTL expansion uses mark_addressable to ensure the base object is addressable but that function doesn't handle TARGET_MEM_REF bases. Fixed as follows. 2022-03-31 Richard Biener PR rtl-optimization/105091 * gimple-expr.cc (mark_addressable): Handle TARGET_MEM_REF bases. --- gcc/gimple-expr.cc | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/gcc/gimple-expr.cc b/gcc/gimple-expr.cc index f9a650b..5faaf43 100644 --- a/gcc/gimple-expr.cc +++ b/gcc/gimple-expr.cc @@ -910,7 +910,8 @@ mark_addressable (tree x) x = TREE_OPERAND (x, 0); while (handled_component_p (x)) x = TREE_OPERAND (x, 0); - if (TREE_CODE (x) == MEM_REF + if ((TREE_CODE (x) == MEM_REF + || TREE_CODE (x) == TARGET_MEM_REF) && TREE_CODE (TREE_OPERAND (x, 0)) == ADDR_EXPR) x = TREE_OPERAND (TREE_OPERAND (x, 0), 0); if (!VAR_P (x) -- 2.7.4