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 在我的问题评论的帮助下，我自己找到了anwser：错误在代码中已经过去了。 价值的加速是问题所在。 在那里，我做了一个超出绑定访问的数组，似乎当if条件中的两个语句都相同时，编译器会优化它。 
 
 这个： 
 
...
int value = stupidArray[wrongIndex];

if( value == 0 )
{
  result = make_float4(0,0,1,0.01);
}
else
{
  result = make_float4(0,0,1,0.01);
}
...
 
 优化到这个： 
 
...
result = make_float4(0,0,1,0.01);
...
 
 所以在这种情况下没有产生错误。 

I found the anwser by myself with the help of the comments on my question: The error was way before in the code. The calcutation of value was the problem. There, I did an array out of bound access and it seems that the compiler optimizes this away when both the statements in the if-condition are the same.
 
This:
 
...
int value = stupidArray[wrongIndex];

if( value == 0 )
{
  result = make_float4(0,0,1,0.01);
}
else
{
  result = make_float4(0,0,1,0.01);
}
...
 
was optimized to this:
 
...
result = make_float4(0,0,1,0.01);
...
 
and so in this case no error was generated.