Hi Martin,
+++ b/gcc/testsuite/gcc.c-torture/pr90263.c
@@ -0,0 +1,9 @@
+/* PR middle-end/90263 */
+
+int *f (int *p, int *q, long n)
+{
+ return __builtin_mempcpy (p, q, n);
+}
+
+/* { dg-final { scan-assembler "mempcpy" { target { i?86-*-* x86_64-*-* } } }
} */
+/* { dg-final { scan-assembler "memcpy" { target { ! { i?86-*-* x86_64-*-* } }
} } } */
This should be gcc/testsuite/gcc.c-torture/compile/pr90263.c, otherwise it is
ignored. The scan-assembler would also need to check for GLIBC unless you
always skip it on x86 (we don't seem to have a check_effective_target_glibc,
maybe it's worth adding?).
Wilco
