Dear all,
I've been working on a loop unrolling scheme and I have a few questions:
1) Is there an interest in having a loop unrolling scheme for GCC? I'm
working on the 4.3.2 version but can port it afterwards to the 4.5
version or any version you think is appropriate.
2) I was using a simple example:
#pragma unroll 2
for (i=0;i<6;i++)
{
printf ("Hello world\n");
}
If I do this, instead of transforming the code into :
for (i=0;i<3;i++)
{
printf ("Hello world\n");
printf ("Hello world\n");
}
as we could expect, it is transformed into:
for (i=0;i<2;i++)
{
printf ("Hello world\n");
printf ("Hello world\n");
}
for (i=0;i<2;i++)
{
printf ("Hello world\n");
}
(I am using 4.3.2 currently)
I am using the tree_unroll_loop function to perform the unrolling and
it seems to always want to keep that epilogue. Is there a reason for
this? Or is this a bug of some sorts?
It seems that because the unrolling function wants always have this epilogue.
I've moved forwards (debugging wise) on this also but will wait to
know a bit of your input. I'll be looking at how to remove this
epilogue when it is not needed.
Thanks in advance,
Jc
