Bug 31756

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Try compiling the included test program with gcc-c++-2.96-69 on x86 with
-O2, you will
get an internal compiler error:

$ g++ -c -O2 sqrt.C 
sqrt.C: In function `float process_pixel (X)':
sqrt.C:12: Internal compiler error in change_stack, at reg-stack.c:2214
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Reproducible: Always
Steps to Reproduce:
Here is the test program:

__inline float sqrtf (float __x) 
{
  register float __result;
  __asm __volatile__ ("fsqrt" : "=t" (__result) : "0" (__x));
  return __result; 
}

class X
{
public:
  X();
  virtual ~X() {}
};

class Y
{
public:
  Y();
  bool foo();
};

float
process_pixel(X x)
{
  Y y;
  if ( !y.foo() )
    return 1.0;
  return 28.0f * sqrtf(28.0);
}
	

Actual Results:  g++ internal compiler error (only with -O2, with -g, it
compiles fine).


Expected Results:  g++ shouldn't die.

The __inline definition of sqrtf() comes from math.h