From fca821b51c6cf7367d78251644e39ee370eb38c3 Mon Sep 17 00:00:00 2001 From: Richard Guenther Date: Fri, 2 Jul 2010 12:28:54 +0000 Subject: tree-ssa-structalias.c (find_func_aliases): Handle pointer alignment via BIT_AND_EXPR. 2010-07-02 Richard Guenther * tree-ssa-structalias.c (find_func_aliases): Handle pointer alignment via BIT_AND_EXPR. * tree-vrp.c (extract_range_from_binary_expr): Likewise. From-SVN: r161707 --- gcc/tree-ssa-structalias.c | 8 ++++++++ 1 file changed, 8 insertions(+) (limited to 'gcc/tree-ssa-structalias.c') diff --git a/gcc/tree-ssa-structalias.c b/gcc/tree-ssa-structalias.c index 77ff17a..b0efcfa 100644 --- a/gcc/tree-ssa-structalias.c +++ b/gcc/tree-ssa-structalias.c @@ -4395,6 +4395,14 @@ find_func_aliases (gimple origt) if (gimple_assign_rhs_code (t) == POINTER_PLUS_EXPR) get_constraint_for_ptr_offset (gimple_assign_rhs1 (t), gimple_assign_rhs2 (t), &rhsc); + else if (gimple_assign_rhs_code (t) == BIT_AND_EXPR + && TREE_CODE (gimple_assign_rhs2 (t)) == INTEGER_CST) + { + /* Aligning a pointer via a BIT_AND_EXPR is offsetting + the pointer. Handle it by offsetting it by UNKNOWN. */ + get_constraint_for_ptr_offset (gimple_assign_rhs1 (t), + NULL_TREE, &rhsc); + } else if ((CONVERT_EXPR_CODE_P (gimple_assign_rhs_code (t)) && !(POINTER_TYPE_P (gimple_expr_type (t)) && !POINTER_TYPE_P (TREE_TYPE (rhsop)))) -- cgit v1.1