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| -rw-r--r-- | lib/Target/README.txt | 12 |
1 files changed, 12 insertions, 0 deletions
diff --git a/lib/Target/README.txt b/lib/Target/README.txt index c2635dade4..be390961d7 100644 --- a/lib/Target/README.txt +++ b/lib/Target/README.txt @@ -138,3 +138,15 @@ And teach the dag combiner enough to simplify the code expanded before legalize. It seems plausible that this knowledge would let it simplify other stuff too. +//===---------------------------------------------------------------------===// + +The loop unroller should be enhanced to be able to unroll loops that aren't +single basic blocks. It should be able to handle stuff like this: + + for (i = 0; i < c1; ++i) + if (c2 & (1 << i)) + foo + +where c1/c2 are constants. + + |