Conditional jump or move depends on uninitialised value(s)
   at 0x........: test (cds.c:17)
   by 0x........: op1_undefined (cds.c:50)
   by 0x........: main (cds.c:77)

Conditional jump or move depends on uninitialised value(s)
   at 0x........: test (cds.c:17)
   by 0x........: op2_undefined (cds.c:61)
   by 0x........: main (cds.c:78)