Bootstrapped/regtested on x86_64-pc-linux-gnu, ok for trunk?
-- >8 --
Here, cxx_eval_outermost_expression gets a sequence of initialization
statements:
D.2912.t = TARGET_EXPR <...>;
TARGET_EXPR <D.2922, 1>;
D.2922 = 0;
the last of which wasn't converted to void and so we, since r15-6369,
do not take the "if (VOID_TYPE_P (type))" path, and try to set
D.2912 to false.
The last statement comes from build_disable_temp_cleanup.
convert_to_void is typically called from finish_expr_stmt, but we are
adding the cleanup statement via add_stmt which doesn't convert to void.
So I think we can use finish_expr_stmt instead.
PR c++/118169
gcc/cp/ChangeLog:
* typeck2.cc (split_nonconstant_init): Call finish_expr_stmt instead
of add_stmt.
gcc/testsuite/ChangeLog:
* g++.dg/cpp1y/constexpr-prvalue2.C: New test.
---
gcc/cp/typeck2.cc | 2 +-
gcc/testsuite/g++.dg/cpp1y/constexpr-prvalue2.C | 13 +++++++++++++
2 files changed, 14 insertions(+), 1 deletion(-)
create mode 100644 gcc/testsuite/g++.dg/cpp1y/constexpr-prvalue2.C
diff --git a/gcc/cp/typeck2.cc b/gcc/cp/typeck2.cc
index 381f198d0fe..5dae7fccf19 100644
--- a/gcc/cp/typeck2.cc
+++ b/gcc/cp/typeck2.cc
@@ -757,7 +757,7 @@ split_nonconstant_init (tree dest, tree init)
init = NULL_TREE;
for (tree f : flags)
- add_stmt (build_disable_temp_cleanup (f));
+ finish_expr_stmt (build_disable_temp_cleanup (f));
release_tree_vector (flags);
code = pop_stmt_list (code);
diff --git a/gcc/testsuite/g++.dg/cpp1y/constexpr-prvalue2.C
b/gcc/testsuite/g++.dg/cpp1y/constexpr-prvalue2.C
new file mode 100644
index 00000000000..7076c65b96a
--- /dev/null
+++ b/gcc/testsuite/g++.dg/cpp1y/constexpr-prvalue2.C
@@ -0,0 +1,13 @@
+// PR c++/118169
+// { dg-do compile { target c++14 } }
+// { dg-options "-O" }
+
+struct A { constexpr A (int *x) : s(x) {} ~A (); int *s; };
+struct B { A t; int u = 0; };
+void foo (B &&);
+
+void
+bar (int &x)
+{
+ foo ({ &x });
+}
base-commit: d3ccd89fa0d34d44226af47fe82c27ba7833fe65
--
2.47.1
