1 files changed, 16 insertions, 0 deletions
diff --git a/gcc/testsuite/gcc.dg/pr43564.c b/gcc/testsuite/gcc.dg/pr43564.c
new file mode 100644
index 000000000..39e0f3ac3
--- /dev/null
+++ b/gcc/testsuite/gcc.dg/pr43564.c
@@ -0,0 +1,16 @@
+/* { dg-options "-O0" } */
+/* { dg-do compile } */
+
+static inline __attribute__ ((__always_inline__))
+unsigned __clz (unsigned input)
+{
+  unsigned output;
+  __asm__ __volatile__ ("clz %0, %1":"=r" (output):"r" (input));
+}
+__attribute__ ((optimize ("O2")))
+void foo ()
+{
+  unsigned a;
+  unsigned b;
+  a = __clz (b);
+}