For __builtin_bswap vectorization we still require an equal vector
type size. Re-instantiate that check.
Bootstrapped and tested on x86_64-unknown-linux-gnu, pushed.
PR tree-optimization/112818
* tree-vect-stmts.cc (vectorizable_bswap): Check input and
output vector types have the same size.
* gcc.dg/vect/pr112818.c: New testcase.
---
gcc/testsuite/gcc.dg/vect/pr112818.c | 34 ++++++++++++++++++++++++++++
gcc/tree-vect-stmts.cc | 9 ++++++++
2 files changed, 43 insertions(+)
create mode 100644 gcc/testsuite/gcc.dg/vect/pr112818.c
diff --git a/gcc/testsuite/gcc.dg/vect/pr112818.c
b/gcc/testsuite/gcc.dg/vect/pr112818.c
new file mode 100644
index 00000000000..61a30a576b7
--- /dev/null
+++ b/gcc/testsuite/gcc.dg/vect/pr112818.c
@@ -0,0 +1,34 @@
+/* { dg-do compile } */
+
+extern char tag_data[];
+struct pppoe_tag {
+ unsigned short tag_type;
+ unsigned short tag_len;
+};
+
+char code;
+int *add_tag_pack;
+void *add_tag_data;
+short e;
+long c, d;
+
+static int add_tag(int type, int len) {
+ short a, b;
+ struct pppoe_tag *tag = (struct pppoe_tag *)add_tag_pack;
+ if (e + len || len < 0)
+ return 1;
+ b = __builtin_bswap16(type);
+ tag->tag_type = b;
+ a = __builtin_bswap16(len);
+ tag->tag_len = a;
+ if (add_tag_data)
+ __builtin___memcpy_chk(tag_data, add_tag_data, len, c);
+ return 0;
+}
+void pppoe_serv_read() {
+ switch (code)
+ case 9: {
+ add_tag(2, d);
+ add_tag(0, 2);
+ }
+}
diff --git a/gcc/tree-vect-stmts.cc b/gcc/tree-vect-stmts.cc
index 067abac3917..390c8472fd6 100644
--- a/gcc/tree-vect-stmts.cc
+++ b/gcc/tree-vect-stmts.cc
@@ -2976,6 +2976,15 @@ vectorizable_bswap (vec_info *vinfo,
gcc_assert (ncopies >= 1);
+ if (TYPE_SIZE (vectype_in) != TYPE_SIZE (vectype))
+ {
+ if (dump_enabled_p ())
+ dump_printf_loc (MSG_MISSED_OPTIMIZATION, vect_location,
+ "mismatched vector sizes %T and %T\n",
+ vectype_in, vectype);
+ return false;
+ }
+
tree char_vectype = get_same_sized_vectype (char_type_node, vectype_in);
if (! char_vectype)
return false;
--
2.35.3
