1 files changed, 21 insertions, 0 deletions
diff --git a/gcc/testsuite/gcc.dg/pr33667.c b/gcc/testsuite/gcc.dg/pr33667.c
new file mode 100644
index 000000000..676c4a46d
--- /dev/null
+++ b/gcc/testsuite/gcc.dg/pr33667.c
@@ -0,0 +1,21 @@
+/* { dg-do compile } */
+/* { dg-options "-O2" } */
+
+__extension__ typedef __SIZE_TYPE__ size_t;
+typedef unsigned char uint8_t;
+typedef unsigned short int uint16_t;
+typedef unsigned long long int uint64_t;
+struct magic {
+  uint8_t mask_op;
+  union {
+   uint64_t _mask;
+  } _u;
+  union VALUETYPE {
+   uint16_t h;
+  } value;
+};
+void cvt_16(union VALUETYPE *p, const struct magic *m)
+{
+  if (m->_u._mask)
+    p->h %= (uint16_t) m->_u._mask;
+}