modernc.org/ccgo/v3@v3.16.14/lib/testdata/gcc-9.1.0/gcc/testsuite/gcc.c-torture/compile/20001226-1.c (about)

     1  /* { dg-do assemble } */
     2  /* { dg-skip-if "too much code for avr" { "avr-*-*" } } */
     3  /* { dg-skip-if "too much code for pdp11" { "pdp11-*-*" } } */
     4  /* { dg-xfail-if "PR36698" { spu-*-* } { "-O0" } { "" } } */
     5  /* { dg-skip-if "" { m32c-*-* } } */
     6  /* { dg-timeout-factor 4.0 } */
     7  
     8  /* This testcase exposed two branch shortening bugs on powerpc.  */
     9  
    10  #define C(a,b) \
    11    if (a > b)  goto gt; \
    12    if (a < b)  goto lt;
    13  
    14  #define C4(x,b) C((x)[0], b) C((x)[1],b) C((x)[2],b) C((x)[3],b)
    15  #define C16(x,y) C4(x, (y)[0]) C4(x, (y)[1]) C4(x, (y)[2]) C4(x, (y)[3])
    16  
    17  #define C64(x,y) C16(x,y) C16(x+4,y) C16(x+8,y) C16(x+12,y)
    18  #define C256(x,y) C64(x,y) C64(x,y+4) C64(x,y+8) C64(x,y+12)
    19  
    20  #define C1024(x,y) C256(x,y) C256(x+16,y) C256(x+32,y) C256(x+48,y)
    21  #define C4096(x,y) C1024(x,y) C1024(x,y+16) C1024(x,y+32) C1024(x,y+48)
    22  
    23  unsigned foo(int x[64], int y[64])
    24  {
    25    C4096(x,y);
    26    
    27    return 0x01234567;
    28   gt:
    29    return 0x12345678;
    30   lt:
    31    return 0xF0123456;
    32  }
    33