public inbox for gcc-cvs@sourceware.org
help / color / mirror / Atom feed
* [gcc r11-9993] c++: alignment of local typedef in template [PR65211]
@ 2022-05-13 16:28 Jason Merrill
0 siblings, 0 replies; only message in thread
From: Jason Merrill @ 2022-05-13 16:28 UTC (permalink / raw)
To: gcc-cvs
https://gcc.gnu.org/g:e60f7127b3282e0201a1bba8ff550dc3c3fdbe61
commit r11-9993-ge60f7127b3282e0201a1bba8ff550dc3c3fdbe61
Author: Jason Merrill <jason@redhat.com>
Date: Wed Apr 13 21:56:03 2022 -0400
c++: alignment of local typedef in template [PR65211]
Because common_handle_aligned_attribute only applies the alignment to the
TREE_TYPE of a typedef, not the DECL_ORIGINAL_TYPE, we need to copy it
explicitly in tsubst.
PR c++/65211
gcc/cp/ChangeLog:
* pt.c (tsubst_decl) [TYPE_DECL]: Copy TYPE_ALIGN.
gcc/testsuite/ChangeLog:
* g++.target/i386/vec-tmpl1.C: New test.
Diff:
---
gcc/cp/pt.c | 6 ++++++
gcc/testsuite/g++.target/i386/vec-tmpl1.C | 17 +++++++++++++++++
2 files changed, 23 insertions(+)
diff --git a/gcc/cp/pt.c b/gcc/cp/pt.c
index ba505820c6a..f5154418594 100644
--- a/gcc/cp/pt.c
+++ b/gcc/cp/pt.c
@@ -15117,6 +15117,12 @@ tsubst_decl (tree t, tree args, tsubst_flags_t complain)
{
DECL_ORIGINAL_TYPE (r) = NULL_TREE;
set_underlying_type (r);
+
+ /* common_handle_aligned_attribute doesn't apply the alignment
+ to DECL_ORIGINAL_TYPE. */
+ if (TYPE_USER_ALIGN (TREE_TYPE (t)))
+ TREE_TYPE (r) = build_aligned_type (TREE_TYPE (r),
+ TYPE_ALIGN (TREE_TYPE (t)));
}
layout_decl (r, 0);
diff --git a/gcc/testsuite/g++.target/i386/vec-tmpl1.C b/gcc/testsuite/g++.target/i386/vec-tmpl1.C
new file mode 100644
index 00000000000..e0865e3515b
--- /dev/null
+++ b/gcc/testsuite/g++.target/i386/vec-tmpl1.C
@@ -0,0 +1,17 @@
+// PR c++/65211
+// { dg-additional-options "-Wno-psabi" }
+// { dg-final { scan-assembler-not "movdqa" } }
+
+typedef unsigned v4ui __attribute__ ((vector_size(16), aligned (16)));
+
+template<int I>
+static v4ui t1(unsigned *dest_data)
+{
+ typedef unsigned v4ui_1 __attribute__ ((vector_size (16), aligned (4)));
+ return ((const v4ui_1*)dest_data)[0];
+}
+
+v4ui f(unsigned int *array)
+{
+ return t1<1>(array+7);
+}
^ permalink raw reply [flat|nested] only message in thread
only message in thread, other threads:[~2022-05-13 16:28 UTC | newest]
Thread overview: (only message) (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
2022-05-13 16:28 [gcc r11-9993] c++: alignment of local typedef in template [PR65211] Jason Merrill
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for read-only IMAP folder(s) and NNTP newsgroup(s).