1 files changed, 82 insertions, 0 deletions
diff --git a/gcc/testsuite/gcc.c-torture/execute/pr40493.c b/gcc/testsuite/gcc.c-torture/execute/pr40493.c
new file mode 100644
index 00000000000..c30786525ea
--- /dev/null
+++ b/gcc/testsuite/gcc.c-torture/execute/pr40493.c
@@ -0,0 +1,82 @@
+extern void abort (void);
+
+typedef union i386_operand_type
+{
+  struct
+    {
+      unsigned int reg8:1;
+      unsigned int reg16:1;
+      unsigned int reg32:1;
+      unsigned int reg64:1;
+      unsigned int floatreg:1;
+      unsigned int regmmx:1;
+      unsigned int regxmm:1;
+      unsigned int regymm:1;
+      unsigned int control:1;
+      unsigned int debug:1;
+      unsigned int test:1;
+      unsigned int sreg2:1;
+      unsigned int sreg3:1;
+      unsigned int imm1:1;
+      unsigned int imm8:1;
+      unsigned int imm8s:1;
+      unsigned int imm16:1;
+      unsigned int imm32:1;
+      unsigned int imm32s:1;
+      unsigned int imm64:1;
+      unsigned int disp8:1;
+      unsigned int disp16:1;
+      unsigned int disp32:1;
+      unsigned int disp32s:1;
+      unsigned int disp64:1;
+      unsigned int acc:1;
+      unsigned int floatacc:1;
+      unsigned int baseindex:1;
+      unsigned int inoutportreg:1;
+      unsigned int shiftcount:1;
+      unsigned int jumpabsolute:1;
+      unsigned int esseg:1;
+      unsigned int regmem:1;
+      unsigned int mem:1;
+      unsigned int byte:1;
+      unsigned int word:1;
+      unsigned int dword:1;
+      unsigned int fword:1;
+      unsigned int qword:1;
+      unsigned int tbyte:1;
+      unsigned int xmmword:1;
+      unsigned int ymmword:1;
+      unsigned int unspecified:1;
+      unsigned int anysize:1;
+    } bitfield;
+  unsigned int array[2];
+} i386_operand_type;
+
+unsigned int x00, x01, y00, y01;
+
+int main (int argc, char *argv[])
+{
+  i386_operand_type a,b,c,d;
+
+  a.bitfield.reg16 = 1;
+  a.bitfield.imm16 = 0;
+  a.array[1] = 22;
+
+  b = a;
+  x00 = b.array[0];
+  x01 = b.array[1];
+
+  c = b;
+  y00 = c.array[0];
+  y01 = c.array[1];
+
+  d = c;
+  if (d.bitfield.reg16 != 1)
+    abort();
+  if (d.bitfield.imm16 != 0)
+    abort();
+  if (d.array[1] != 22)
+    abort();
+
+  return 0;
+}