* [pushed] c++: alignment of local typedef in template [PR65211]
@ 2022-04-14 2:56 Jason Merrill
2022-04-26 7:56 ` [committed] testsuite: Fix up g++.target/i386/vec-tmpl1.C testcase [PR65211] Jakub Jelinek
0 siblings, 1 reply; 2+ messages in thread
From: Jason Merrill @ 2022-04-14 2:56 UTC (permalink / raw)
To: gcc-patches
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.
Tested x86_64-pc-linux-gnu, applying to trunk.
PR c++/65211
gcc/cp/ChangeLog:
* pt.cc (tsubst_decl) [TYPE_DECL]: Copy TYPE_ALIGN.
gcc/testsuite/ChangeLog:
* g++.target/i386/vec-tmpl1.C: New test.
---
gcc/cp/pt.cc | 6 ++++++
gcc/testsuite/g++.target/i386/vec-tmpl1.C | 16 ++++++++++++++++
2 files changed, 22 insertions(+)
create mode 100644 gcc/testsuite/g++.target/i386/vec-tmpl1.C
diff --git a/gcc/cp/pt.cc b/gcc/cp/pt.cc
index adc863de702..dde62ee052d 100644
--- a/gcc/cp/pt.cc
+++ b/gcc/cp/pt.cc
@@ -15084,6 +15084,12 @@ 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..d512072a2a2
--- /dev/null
+++ b/gcc/testsuite/g++.target/i386/vec-tmpl1.C
@@ -0,0 +1,16 @@
+// PR c++/65211
+// { 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);
+}
base-commit: 1824da60663b4532199ecd051d8ba6da8995821d
--
2.27.0
^ permalink raw reply [flat|nested] 2+ messages in thread
* [committed] testsuite: Fix up g++.target/i386/vec-tmpl1.C testcase [PR65211]
2022-04-14 2:56 [pushed] c++: alignment of local typedef in template [PR65211] Jason Merrill
@ 2022-04-26 7:56 ` Jakub Jelinek
0 siblings, 0 replies; 2+ messages in thread
From: Jakub Jelinek @ 2022-04-26 7:56 UTC (permalink / raw)
To: Jason Merrill; +Cc: gcc-patches
Hi!
This test fails on i686-linux:
Excess errors:
.../gcc/testsuite/g++.target/i386/vec-tmpl1.C:13:27: warning: SSE vector return without SSE enabled changes the ABI [-Wpsabi]
Fixed thusly, tested on x86_64-linux with
make check-g++ RUNTESTFLAGS='--target_board=unix\{-m32,-m64,-m32/-mno-sse\} i386.exp=vec-tmpl*'
and committed to trunk as obvious.
2022-04-26 Jakub Jelinek <jakub@redhat.com>
PR c++/65211
* g++.target/i386/vec-tmpl1.C: Add -Wno-psabi as
dg-additional-options.
--- gcc/testsuite/g++.target/i386/vec-tmpl1.C.jj 2022-04-14 13:46:59.621141017 +0200
+++ gcc/testsuite/g++.target/i386/vec-tmpl1.C 2022-04-26 09:51:10.336944403 +0200
@@ -1,4 +1,5 @@
// PR c++/65211
+// { dg-additional-options "-Wno-psabi" }
// { dg-final { scan-assembler-not "movdqa" } }
typedef unsigned v4ui __attribute__ ((vector_size(16), aligned (16)));
Jakub
^ permalink raw reply [flat|nested] 2+ messages in thread
end of thread, other threads:[~2022-04-26 7:57 UTC | newest]
Thread overview: 2+ messages (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
2022-04-14 2:56 [pushed] c++: alignment of local typedef in template [PR65211] Jason Merrill
2022-04-26 7:56 ` [committed] testsuite: Fix up g++.target/i386/vec-tmpl1.C testcase [PR65211] Jakub Jelinek
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).