1 files changed, 18 insertions, 0 deletions
diff --git a/gcc/testsuite/gcc.target/i386/pr42589.c b/gcc/testsuite/gcc.target/i386/pr42589.c
new file mode 100644
index 000000000..1366ef5b3
--- /dev/null
+++ b/gcc/testsuite/gcc.target/i386/pr42589.c
@@ -0,0 +1,18 @@
+/* { dg-do compile } */
+/* { dg-require-effective-target ilp32 } */
+/* { dg-skip-if "" { i?86-*-* x86_64-*-* } { "-march=*" } { "-march=i486" } } */
+/* { dg-options "-O2 -march=i486" } */
+
+void
+foo (unsigned long long *p)
+{
+  unsigned long long tmp;
+  tmp = *p;
+  tmp = (tmp >> 32) | (tmp << 32);
+  tmp = (((tmp & 0xff00ff00ff00ff00ULL) >> 8)
+	 | ((tmp & 71777214294589695ULL) << 8));
+  *p = (((tmp & 0xffff0000ffff0000ULL) >> 16)
+	| ((tmp & 281470681808895ULL) << 16));
+}
+
+/* { dg-final { scan-assembler-times "bswap" 2 } } */