modernc.org/ccgo/v3@v3.16.14/lib/testdata/gcc-9.1.0/gcc/testsuite/gcc.c-torture/execute/20020206-2.c (about)

     1  /* Origin: PR c/5420 from David Mosberger <davidm@hpl.hp.com>.
     2     This testcase was miscompiled when tail call optimizing, because a
     3     compound literal initialization was emitted only in the tail call insn
     4     chain, not in the normal call insn chain.  */
     5  
     6  typedef struct { unsigned short a; } A;
     7  
     8  extern void abort (void);
     9  extern void exit (int);
    10  
    11  void foo (unsigned int x)
    12  {
    13    if (x != 0x800 && x != 0x810)
    14      abort ();
    15  }
    16  
    17  int
    18  main (int argc, char **argv)
    19  {
    20    int i;
    21    for (i = 0; i < 2; ++i)
    22      foo (((A) { ((!(i >> 4) ? 8 : 64 + (i >> 4)) << 8) + (i << 4) } ).a);
    23    exit (0);
    24  }