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/* { dg-do compile } */
/* { dg-options "-O -fdump-tree-backprop-details" } */
void start (void *);
void end (void *);
/* Test that we optimize the contents of infinite loops. */
#define TEST_FUNCTION(TYPE, SUFFIX) \
void \
test##SUFFIX (TYPE *array, TYPE y, int n) \
{ \
for (;;) \
{ \
start (array); \
TYPE x = -__builtin_fabs##SUFFIX (array[-1]); \
for (int i = 0; i < n; ++i) \
x = -x / array[i]; \
array[-1] = x * x; \
array[-2] = __builtin_fma##SUFFIX (x, x, y); \
array[-3] = __builtin_pow##SUFFIX (x, 20); \
end (array); \
} \
}
TEST_FUNCTION (float, f)
TEST_FUNCTION (double, )
TEST_FUNCTION (long double, l)
/* { dg-final { scan-tree-dump-times {Deleting[^\n]* = -} 6 "backprop" } } */
/* { dg-final { scan-tree-dump-times {Deleting[^\n]* = ABS_EXPR <} 3 "backprop" } } */
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