1 files changed, 22 insertions, 0 deletions
diff --git a/gcc/testsuite/gcc.c-torture/compile/pr40351.c b/gcc/testsuite/gcc.c-torture/compile/pr40351.c
new file mode 100644
index 000000000..9b7e0ccfa
--- /dev/null
+++ b/gcc/testsuite/gcc.c-torture/compile/pr40351.c
@@ -0,0 +1,22 @@
+/* PR tree-optimizations/40351 */
+
+struct IO_APIC_route_entry {
+    unsigned int vector : 8;
+    unsigned int delivery_mode : 1;
+    unsigned int mask : 1;
+    unsigned int __reserved_2 : 15;
+    unsigned int __reserved_3 : 8;
+} __attribute__ ((packed));
+union entry_union {
+    struct {
+        unsigned int w1, w2;
+    };
+    struct IO_APIC_route_entry entry;
+};
+unsigned int io_apic_read(void);
+struct IO_APIC_route_entry ioapic_read_entry(void)
+{
+  union entry_union eu;
+  eu.w1 = io_apic_read();
+  return eu.entry;
+}