From 824ff0cd22d948a72853f6aad98b9cd5a832a2a5 Mon Sep 17 00:00:00 2001 From: Richard Guenther Date: Thu, 24 Sep 2009 13:47:26 +0000 Subject: re PR middle-end/36143 (FAIL: g++.dg/tree-ssa/pr19637.C) 2009-09-24 Richard Guenther PR tree-optimization/36143 PR tree-optimization/38747 * tree-ssa-forwprop.c (forward_propagate_addr_expr_1): Only create VIEW_CONVERT_EXPRs for TBAA compatible accesses. * gcc.dg/tree-ssa/fre-vce-1.c: XFAIL. * gcc.dg/tree-ssa/forwprop-6.c: Likewise. * g++.dg/torture/pr38747.C: New testcase. * g++.dg/tree-ssa/pr19637.C: Un-XFAIL. From-SVN: r152122 --- gcc/tree-ssa-forwprop.c | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-) (limited to 'gcc/tree-ssa-forwprop.c') diff --git a/gcc/tree-ssa-forwprop.c b/gcc/tree-ssa-forwprop.c index 5aec334..87795a2 100644 --- a/gcc/tree-ssa-forwprop.c +++ b/gcc/tree-ssa-forwprop.c @@ -831,7 +831,9 @@ forward_propagate_addr_expr_1 (tree name, tree def_rhs, && !TYPE_VOLATILE (TREE_TYPE (rhs)) && !TYPE_VOLATILE (TREE_TYPE (TREE_OPERAND (def_rhs, 0))) && operand_equal_p (TYPE_SIZE (TREE_TYPE (rhs)), - TYPE_SIZE (TREE_TYPE (TREE_OPERAND (def_rhs, 0))), 0)) + TYPE_SIZE (TREE_TYPE (TREE_OPERAND (def_rhs, 0))), 0) + /* Make sure we only do TBAA compatible replacements. */ + && get_alias_set (TREE_OPERAND (def_rhs, 0)) == get_alias_set (rhs)) { tree def_rhs_base, new_rhs = unshare_expr (TREE_OPERAND (def_rhs, 0)); new_rhs = fold_build1 (VIEW_CONVERT_EXPR, TREE_TYPE (rhs), new_rhs); -- cgit v1.1