From af947da7a78ce3393b3aab0184170b2164062fab Mon Sep 17 00:00:00 2001 From: Richard Guenther Date: Thu, 30 Aug 2007 14:52:28 +0000 Subject: [PATCH] re PR middle-end/33199 (tr1/2_general_utilities/shared_ptr/assign/auto_ptr.cc) 2007-08-30 Richard Guenther PR tree-optimization/33199 * tree-ssa-structalias.c (handle_lhs_call): New function. (find_func_aliases): In non-IPA mode make sure that for calls that return a pointer we add a constraint for the result to point to anything. From-SVN: r127927 --- gcc/ChangeLog | 8 ++++++++ gcc/tree-ssa-structalias.c | 27 ++++++++++++++++++++++++++- 2 files changed, 34 insertions(+), 1 deletion(-) diff --git a/gcc/ChangeLog b/gcc/ChangeLog index e5d5249c84b..f706cff5993 100644 --- a/gcc/ChangeLog +++ b/gcc/ChangeLog @@ -1,3 +1,11 @@ +2007-08-30 Richard Guenther + + PR tree-optimization/33199 + * tree-ssa-structalias.c (handle_lhs_call): New function. + (find_func_aliases): In non-IPA mode make sure that for + calls that return a pointer we add a constraint for the + result to point to anything. + 2007-08-30 Richard Guenther * doc/invoke.texi (-mveclibabi): Document new target option. diff --git a/gcc/tree-ssa-structalias.c b/gcc/tree-ssa-structalias.c index dbece90fc5b..a379e7e2a8d 100644 --- a/gcc/tree-ssa-structalias.c +++ b/gcc/tree-ssa-structalias.c @@ -3655,6 +3655,27 @@ handle_rhs_call (tree rhs) } } +/* For non-IPA mode, generate constraints necessary for a call + that returns a pointer and assigns it to LHS. This simply makes + the LHS point to anything. */ + +static void +handle_lhs_call (tree lhs) +{ + VEC(ce_s, heap) *lhsc = NULL; + struct constraint_expr rhsc; + unsigned int j; + struct constraint_expr *lhsp; + + rhsc.var = anything_id; + rhsc.offset = 0; + rhsc.type = ADDRESSOF; + get_constraint_for (lhs, &lhsc); + for (j = 0; VEC_iterate (ce_s, lhsc, j, lhsp); j++) + process_constraint_1 (new_constraint (*lhsp, rhsc), true); + VEC_free (ce_s, heap, lhsc); +} + /* Walk statement T setting up aliasing constraints according to the references found in T. This function is the main part of the constraint builder. AI points to auxiliary alias information used @@ -3726,7 +3747,11 @@ find_func_aliases (tree origt) if (!in_ipa_mode) { if (TREE_CODE (t) == GIMPLE_MODIFY_STMT) - handle_rhs_call (GIMPLE_STMT_OPERAND (t, 1)); + { + handle_rhs_call (GIMPLE_STMT_OPERAND (t, 1)); + if (POINTER_TYPE_P (TREE_TYPE (GIMPLE_STMT_OPERAND (t, 1)))) + handle_lhs_call (GIMPLE_STMT_OPERAND (t, 0)); + } else handle_rhs_call (t); } -- 2.30.2