builtins-21.c

用于进行gcc测试

/* Copyright (C) 2003  Free Software Foundation.

   Verify that built-in math function constant folding doesn't
   cause any problems for the compiler.

   Written by Roger Sayle, 7th June 2003.  */

/* { dg-do compile } */
/* { dg-options "-O2 -ffast-math" } */

extern double fabs (double);
extern float fabsf (float);
extern long double fabsl (long double);
extern double sqrt (double);
extern float sqrtf (float);
extern long double sqrtl (long double);
extern double exp (double);
extern float expf (float);
extern long double expl (long double);

double test1(double x)
{
  return fabs(x*x);
}

double test2(double x)
{
  return fabs(sqrt(x)+2.0);
}

double test3(double x)
{
  return fabs(3.0*exp(x));
}

float test1f(float x)
{
  return fabsf(x*x);
}

float test2f(float x)
{
  return fabsf(sqrtf(x)+2.0f);
}

float test3f(float x)
{
  return fabsf(3.0f*expf(x));
}

long double test1l(long double x)
{
  return fabsl(x*x);
}

long double test2l(long double x)
{
  return fabsl(sqrtl(x)+2.0l);
}

long double test3l(long double x)
{
  return fabsl(3.0l*expl(x));
}