56 lines
1.0 KiB
C
56 lines
1.0 KiB
C
/* Copyright (C) 2003 Free Software Foundation.
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Check that constant folding of built-in math functions doesn't
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break anything and produces the expected results.
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Written by Roger Sayle, 2nd April 2003. */
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/* { dg-do link } */
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/* { dg-options "-O2 -ffast-math" } */
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extern void link_error(void);
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extern double exp(double);
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extern double log(double);
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extern double sqrt(double);
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extern double pow(double,double);
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extern double fabs(double);
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void test(double x)
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{
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if (sqrt(pow(x,4.0)) != x*x)
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link_error ();
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if (pow(sqrt(x),4.0) != x*x)
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link_error ();
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if (pow(pow(x,4.0),0.25) != x)
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/* XFAIL. PR41098. */;
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}
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void test2(double x, double y, double z)
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{
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if (sqrt(pow(x,y)) != pow(fabs(x),y*0.5))
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link_error ();
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if (log(pow(x,y)) != y*log(x))
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link_error ();
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if (pow(exp(x),y) != exp(x*y))
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link_error ();
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if (pow(sqrt(x),y) != pow(x,y*0.5))
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link_error ();
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if (pow(pow(fabs(x),y),z) != pow(fabs(x),y*z))
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link_error ();
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}
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int main()
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{
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test (2.0);
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test2 (2.0, 3.0, 4.0);
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return 0;
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}
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