split_nonconstant_init was doing the wrong thing for both the initialization
and cleanup here; we know the size from the initializer, and we can pass it
along. This doesn't make the testcase work, since the y destructor is still
broken, but it removes the wrong error for the aggregate initialization.
Tested x86_64-pc-linux-gnu, applying to trunk.
gcc/cp/ChangeLog:
* typeck2.c (split_nonconstant_init_1): Handle flexarrays better.
gcc/testsuite/ChangeLog:
* g++.dg/ext/flexary37.C: Remove expected error.
---
gcc/cp/typeck2.c | 9 +++++++++
gcc/testsuite/g++.dg/ext/flexary37.C | 2 +-
2 files changed, 10 insertions(+), 1 deletion(-)
diff --git a/gcc/cp/typeck2.c b/gcc/cp/typeck2.c
index c01f2f8ced4..e98fbf7f5fa 100644
--- a/gcc/cp/typeck2.c
+++ b/gcc/cp/typeck2.c
@@ -484,6 +484,15 @@ split_nonconstant_init_1 (tree dest, tree init, bool
nested)
&& TYPE_HAS_NONTRIVIAL_DESTRUCTOR (type))
|| vla_type_p (type))
{
+ if (!TYPE_DOMAIN (type)
+ && TREE_CODE (init) == CONSTRUCTOR
+ && CONSTRUCTOR_NELTS (init))
+ {
+ /* Flexible array. */
+ cp_complete_array_type (&type, init, /*default*/true);
+ dest = build1 (VIEW_CONVERT_EXPR, type, dest);
+ }
+
/* For an array, we only need/want a single cleanup region rather
than one per element. */
tree code = build_vec_init (dest, NULL_TREE, init, false, 1,
diff --git a/gcc/testsuite/g++.dg/ext/flexary37.C
b/gcc/testsuite/g++.dg/ext/flexary37.C
index ceb5053de2e..5cd48c1f773 100644
--- a/gcc/testsuite/g++.dg/ext/flexary37.C
+++ b/gcc/testsuite/g++.dg/ext/flexary37.C
@@ -12,4 +12,4 @@ public:
struct y { // { dg-error "unknown array size in delete" }
int a; C b[];
-} y = { 1, { { 2, 3 } } }; // { dg-error "unknown array size in delete" }
+} y = { 1, { { 2, 3 } } };
base-commit: 323026c7dfe23e1093e80f7db5f4851d1a867b62
--
2.27.0
