loop-ivopts-1.c

来自「Mac OS X 10.4.9 for x86 Source Code gcc」· C语言 代码 · 共 31 行

/* From PR 18977.  */
void foo(float * x);

int main()
{
  float x[4];
  foo (x);
  return 0;
}

void foo (float *x)
{
    int i,j,k;
    float temp;
    static float t16[16]={1.,2.,3.,4.,5.,6.,7.,8.,9.,
			  10.,11.,12.,13.,14.,15.,16.};
    static float tmp[4]={0.,0.,0.,0.};

    for (i=0; i<4; i++) {
	k = 3 - i;
	temp = t16[5*k];
	for(j=k+1; j<4; j++) {
	    tmp[k] = t16[k+  j*4] * temp;
	}
    }
    x[0] = tmp[0];
    x[1] = tmp[1];
    x[2] = tmp[2];
    x[3] = tmp[3];
}