Will the compiler optimize escaping an inner loop?
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by BCS
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Published on 2010-06-16T01:18:47Z
Indexed on
2010/06/16
1:22 UTC
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Hit count: 230
The code I have looks like this (all uses of done shown):
bool done = false;
for(int i = 0; i < big; i++)
{
...
for(int j = 0; j < wow; j++)
{
...
if(foo(i,j))
{
done = true;
break;
}
...
}
if(done) break;
...
}
will any compilers convert it to this:
for(int i = 0; i < big; i++)
{
...
for(int j = 0; j < wow; j++)
{
...
if(foo(i,j))
goto __done; // same as a labeled break if we had it
...
}
...
}
__done:;
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