From a41e5e86c0bbcb0dca6311a5e6dab8d7e005a076 Mon Sep 17 00:00:00 2001 From: Richard Guenther Date: Mon, 5 Jul 2010 14:51:16 +0000 Subject: tree.c (reference_alias_ptr_type): New function. 2010-07-05 Richard Guenther * tree.c (reference_alias_ptr_type): New function. * tree.h (reference_alias_ptr_type): Declare. * tree-ssa-loop-ivopts.c (copy_ref_info): Restructure to allow non-TARGET_MEM_REF new refs. (rewrite_use_address): Pass old alias pointer type to create_mem_ref. * tree-ssa-address.c (create_mem_ref_raw): Get alias pointer type. Build a MEM_REF instead of a TARGET_MEM_REF if possible. (create_mem_ref): Get alias pointer type. Adjust calls to create_mem_ref_raw. (maybe_fold_tmr): Likewise. * tree-flow.h (create_mem_ref): Adjust prototype. From-SVN: r161840 --- gcc/tree.c | 19 +++++++++++++++++++ 1 file changed, 19 insertions(+) (limited to 'gcc/tree.c') diff --git a/gcc/tree.c b/gcc/tree.c index cb2c276..e6deacc 100644 --- a/gcc/tree.c +++ b/gcc/tree.c @@ -3913,6 +3913,25 @@ mem_ref_offset (const_tree t) TYPE_PRECISION (TREE_TYPE (toff))); } +/* Return the pointer-type relevant for TBAA purposes from the + gimple memory reference tree T. This is the type to be used for + the offset operand of MEM_REF or TARGET_MEM_REF replacements of T. */ + +tree +reference_alias_ptr_type (const_tree t) +{ + const_tree base = t; + while (handled_component_p (base)) + base = TREE_OPERAND (base, 0); + if (TREE_CODE (base) == MEM_REF) + return TREE_TYPE (TREE_OPERAND (base, 1)); + else if (TREE_CODE (base) == TARGET_MEM_REF + || TREE_CODE (base) == MISALIGNED_INDIRECT_REF) + return NULL_TREE; + else + return build_pointer_type (TYPE_MAIN_VARIANT (TREE_TYPE (base))); +} + /* Similar except don't specify the TREE_TYPE and leave the TREE_SIDE_EFFECTS as 0. It is permissible for arguments to be null, -- cgit v1.1