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Diffstat (limited to 'lib/Target/README.txt')
| -rw-r--r-- | lib/Target/README.txt | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/lib/Target/README.txt b/lib/Target/README.txt index 2a0d8e1..32a2e7c 100644 --- a/lib/Target/README.txt +++ b/lib/Target/README.txt @@ -64,4 +64,8 @@ Number 1 is the preferred solution. //===---------------------------------------------------------------------===// +For dag combiner and instcombine: +Fold: "A / (B << N)" where B is a power of 2, to "A >> (N + log2(B))". +Fold: "A % (B << N)" where B is a power of 2, to "A & ((B << N) - 1)". +//===---------------------------------------------------------------------===// |