modernc.org/ccgo/v3@v3.16.14/lib/testdata/gcc-9.1.0/gcc/testsuite/gcc.c-torture/compile/20020312-1.c (about)

     1  /* { dg-do assemble } */
     2  /* { dg-skip-if "" { pdp11-*-* } { "-O0" } { "" } } */
     3  
     4  /* PR optimization/5892 */
     5  typedef struct { unsigned long a; unsigned int b, c; } A;
     6  typedef struct { unsigned long a; A *b; int c; } B;
     7  
     8  static inline unsigned int
     9  bar (unsigned int x)
    10  {
    11    unsigned long r;
    12    asm ("" : "=r" (r) : "0" (x));
    13    return r >> 31;
    14  }
    15  
    16  int foo (B *x)
    17  {
    18    A *y;
    19    y = x->b;
    20    y->b = bar (x->c);
    21    y->c = ({ unsigned int z = 1; (z << 24) | (z >> 24); });
    22  }