test/FrontendC/2010-07-14-ref-off-end.c

   1 // RUN: %llvmgcc %s -S -m32 -o - | FileCheck %s
   2 // Formerly this generated code that did a load past the end of the structure.
   3 // That was fixed by 46726, but that patch had bad side effects and was
   4 // reverted.  This has been fixed another way in the meantime.
   5 extern void abort();
   6 extern void exit(int);
   7 struct T
   8 {
   9 unsigned i:8;
  10 unsigned c:24;
  11 };
  12 f(struct T t)
  13 {
  14 struct T s[1];
  15 s[0]=t;
  16 return(char)s->c;
  17 }
  18 main()
  19 {
  20 // CHECK:  getelementptr inbounds %struct.T* %t, i32 0, i32 0
  21 // CHECK:  getelementptr inbounds %struct.T* %t, i32 0, i32 0
  22 struct T t;
  23 t.i=0xff;
  24 t.c=0xffff11;
  25 if(f(t)!=0x11)abort();
  26 exit(0);
  27 }