From 9362abf5e81eb2e6e35f55f36ff8e7a31aef4e9d Mon Sep 17 00:00:00 2001
From: Eric Botcazou <ebotcazou@adacore.com>
Date: Fri, 23 Aug 2024 09:44:06 +0200
Subject: [PATCH] ada: Plug loophole exposed by previous change
The change causes more temporaries to be created at call sites for unaligned
actual parameters, thus revealing that the machinery does not properly deal
with unconstrained nominal subtypes for them.
gcc/ada/
* gcc-interface/trans.cc (create_temporary): Deal with types whose
size is self-referential by allocating the maximum size.
---
gcc/ada/gcc-interface/trans.cc | 3 +++
1 file changed, 3 insertions(+)
diff --git a/gcc/ada/gcc-interface/trans.cc b/gcc/ada/gcc-interface/trans.cc
index caa0f56a34d9..fadd6b483d5a 100644
--- a/gcc/ada/gcc-interface/trans.cc
+++ b/gcc/ada/gcc-interface/trans.cc
@@ -4527,6 +4527,9 @@ storage_model_access_required_p (Node_Id gnat_node, Entity_Id *gnat_smo)
static tree
create_temporary (const char *prefix, tree type)
{
+ if (CONTAINS_PLACEHOLDER_P (TYPE_SIZE (type)))
+ type = maybe_pad_type (type, max_size (TYPE_SIZE (type), true), 0,
+ Empty, false, false, true);
tree gnu_temp
= create_var_decl (create_tmp_var_name (prefix), NULL_TREE,
type, NULL_TREE,
--
GitLab