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| author | Jason Merrill <jason@redhat.com> | 2022-04-13 21:56:03 -0400 |
|---|---|---|
| committer | Jason Merrill <jason@redhat.com> | 2022-04-13 21:56:43 -0400 |
| commit | 8369b4e4c6433535981d377edc1d4abb799c9225 (patch) | |
| tree | f8c984355172013ae244a8055c54f29bd5729df4 /gcc | |
| parent | 1824da60663b4532199ecd051d8ba6da8995821d (diff) | |
| download | gcc-8369b4e4c6433535981d377edc1d4abb799c9225.zip gcc-8369b4e4c6433535981d377edc1d4abb799c9225.tar.gz gcc-8369b4e4c6433535981d377edc1d4abb799c9225.tar.bz2 | |
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.cc (tsubst_decl) [TYPE_DECL]: Copy TYPE_ALIGN.
gcc/testsuite/ChangeLog:
* g++.target/i386/vec-tmpl1.C: New test.
Diffstat (limited to 'gcc')
| -rw-r--r-- | gcc/cp/pt.cc | 6 | ||||
| -rw-r--r-- | gcc/testsuite/g++.target/i386/vec-tmpl1.C | 16 |
2 files changed, 22 insertions, 0 deletions
diff --git a/gcc/cp/pt.cc b/gcc/cp/pt.cc index adc863d..dde62ee 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 0000000..d512072 --- /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); +} |