Viewing file:  predict-18.c (1.15 KB) -rw-r--r--
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/* { dg-do compile } */
/* { dg-options "-O2 -fdump-tree-profile_estimate" } */
extern int global;
int x;
short v = 0;
short expected = 0;
short max = ~0;
#define STRONG 0
void foo (int a, int b)
{
if (__builtin_expect_with_probability (a < b, 1, 0.6f) > __builtin_expect (b, 0))
global++;
if (__builtin_expect_with_probability (a < b, 1, 0.777f) > 0)
global++;
if (__builtin_expect_with_probability (a < b, 1, 0.99) == __atomic_compare_exchange_n (&v, &expected, max, STRONG , __ATOMIC_RELAXED, __ATOMIC_RELAXED))
global++;
if (__builtin_expect_with_probability (a < 10, 1, 0.9f) > __builtin_expect_with_probability (b, 0, 0.8f))
global++;
}
/* { dg-final { scan-tree-dump "__builtin_expect_with_probability heuristics of edge .*->.*: 54.00%" "profile_estimate"} } */
/* { dg-final { scan-tree-dump "__builtin_expect_with_probability heuristics of edge .*->.*: 77.70%" "profile_estimate"} } */
/* { dg-final { scan-tree-dump "__builtin_expect_with_probability heuristics of edge .*->.*: 98.96%" "profile_estimate"} } */
/* { dg-final { scan-tree-dump "__builtin_expect_with_probability heuristics of edge .*->.*: 71.99%" "profile_estimate"} } */
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