diff options
Diffstat (limited to 'gcc/cp/cp-gimplify.cc')
| -rw-r--r-- | gcc/cp/cp-gimplify.cc | 31 |
1 files changed, 28 insertions, 3 deletions
diff --git a/gcc/cp/cp-gimplify.cc b/gcc/cp/cp-gimplify.cc index 83ba128..92cd309 100644 --- a/gcc/cp/cp-gimplify.cc +++ b/gcc/cp/cp-gimplify.cc @@ -952,6 +952,28 @@ cp_genericize_target_expr (tree *stmt_p) gcc_assert (!DECL_INITIAL (slot)); } +/* Similar to if (target_expr_needs_replace) replace_decl, but TP is the + TARGET_EXPR_INITIAL, and this also updates *_SLOT. We need this extra + replacement when cp_folding TARGET_EXPR to preserve the invariant that + AGGR_INIT_EXPR_SLOT agrees with the enclosing TARGET_EXPR_SLOT. */ + +bool +maybe_replace_decl (tree *tp, tree decl, tree replacement) +{ + if (!*tp || !VOID_TYPE_P (TREE_TYPE (*tp))) + return false; + tree t = *tp; + while (TREE_CODE (t) == COMPOUND_EXPR) + t = TREE_OPERAND (t, 1); + if (TREE_CODE (t) == AGGR_INIT_EXPR) + replace_decl (&AGGR_INIT_EXPR_SLOT (t), decl, replacement); + else if (TREE_CODE (t) == VEC_INIT_EXPR) + replace_decl (&VEC_INIT_EXPR_SLOT (t), decl, replacement); + else + replace_decl (tp, decl, replacement); + return true; +} + /* Genericization context. */ struct cp_genericize_data @@ -1116,15 +1138,18 @@ cp_fold_r (tree *stmt_p, int *walk_subtrees, void *data_) cp_genericize_target_expr (stmt_p); /* Folding might replace e.g. a COND_EXPR with a TARGET_EXPR; in - that case, use it in place of this one. */ + that case, strip it in favor of this one. */ if (tree &init = TARGET_EXPR_INITIAL (stmt)) { cp_walk_tree (&init, cp_fold_r, data, NULL); + cp_walk_tree (&TARGET_EXPR_CLEANUP (stmt), cp_fold_r, data, NULL); *walk_subtrees = 0; if (TREE_CODE (init) == TARGET_EXPR) { - TARGET_EXPR_ELIDING_P (init) = TARGET_EXPR_ELIDING_P (stmt); - *stmt_p = init; + tree sub = TARGET_EXPR_INITIAL (init); + maybe_replace_decl (&sub, TARGET_EXPR_SLOT (init), + TARGET_EXPR_SLOT (stmt)); + init = sub; } } break; |