gcc/testsuite/gcc.dg/tree-prof/section-attr-1.c

   1 /* Checks for a bug where a function with a section attribute would prevent
   2    all later functions from being partitioned into hot and cold blocks.  */
   3 /* { dg-require-effective-target freorder } */
   4 /* { dg-options "-O2 -fno-profile-reorder-functions -freorder-blocks-and-partition -save-temps" } */
   5
   6 #ifdef FOR_AUTOFDO_TESTING
   7 #define MAXITER 1000000
   8 #else
   9 #define MAXITER 10000
  10 #endif
  11
  12 #define SIZE 10000
  13
  14 #define NOINLINE __attribute__((noinline)) __attribute__ ((noclone))
  15
  16 const char *sarr[SIZE];
  17 const char *buf_hot;
  18 const char *buf_cold;
  19
  20 void foo (int path);
  21
  22 #ifdef __APPLE__
  23 __attribute__ ((section ("__TEXT,__text")))
  24 #else
  25 __attribute__((section(".text")))
  26 #endif
  27 int
  28 main (int argc, char *argv[])
  29 {
  30   int i;
  31   buf_hot =  "hello";
  32   buf_cold = "world";
  33   for (i = 0; i < MAXITER; i++)
  34     foo (argc);
  35   return 0;
  36 }
  37
  38
  39 void NOINLINE
  40 foo (int path)
  41 {
  42   int i;
  43   if (path)
  44     {
  45       for (i = 0; i < SIZE; i++)
  46         sarr[i] = buf_hot;
  47     }
  48   else
  49     {
  50       for (i = 0; i < SIZE; i++)
  51         sarr[i] = buf_cold;
  52     }
  53 }
  54
  55 /* { dg-final-use-not-autofdo { scan-assembler "\.section\[\t \]*\.text\.unlikely\[\\n\\r\]+\[\t \]*\.size\[\t \]*foo\.cold" { target *-*-linux* *-*-gnu* } } } */
  56 /* { dg-final-use-not-autofdo { scan-assembler {.section[\t ]*__TEXT,__text_cold[^\n]*[\n\r]+_foo.cold:} { target *-*-darwin* } } } */