modernc.org/cc@v1.0.1/testdata/gcc-6.3.0/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 "jump beyond 128K not supported" { xtensa*-*-* } { "-O0" } { "" } } */
     5  /* { dg-xfail-if "PR36698" { spu-*-* } { "-O0" } { "" } } */
     6  /* { dg-skip-if "" { m32c-*-* } { "*" } { "" } } */
     7  /* { dg-timeout-factor 4.0 } */
     8  
     9  /* This testcase exposed two branch shortening bugs on powerpc.  */
    10  
    11  #define C(a,b) \
    12    if (a > b)  goto gt; \
    13    if (a < b)  goto lt;
    14  
    15  #define C4(x,b) C((x)[0], b) C((x)[1],b) C((x)[2],b) C((x)[3],b)
    16  #define C16(x,y) C4(x, (y)[0]) C4(x, (y)[1]) C4(x, (y)[2]) C4(x, (y)[3])
    17  
    18  #define C64(x,y) C16(x,y) C16(x+4,y) C16(x+8,y) C16(x+12,y)
    19  #define C256(x,y) C64(x,y) C64(x,y+4) C64(x,y+8) C64(x,y+12)
    20  
    21  #define C1024(x,y) C256(x,y) C256(x+16,y) C256(x+32,y) C256(x+48,y)
    22  #define C4096(x,y) C1024(x,y) C1024(x,y+16) C1024(x,y+32) C1024(x,y+48)
    23  
    24  unsigned foo(int x[64], int y[64])
    25  {
    26    C4096(x,y);
    27    
    28    return 0x01234567;
    29   gt:
    30    return 0x12345678;
    31   lt:
    32    return 0xF0123456;
    33  }
    34