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-rw-r--r--include/llvm/ADT/APInt.h5
1 files changed, 5 insertions, 0 deletions
diff --git a/include/llvm/ADT/APInt.h b/include/llvm/ADT/APInt.h
index 6c418bd..88aa995 100644
--- a/include/llvm/ADT/APInt.h
+++ b/include/llvm/ADT/APInt.h
@@ -1234,6 +1234,11 @@ public:
return BitWidth - 1 - countLeadingZeros();
}
+ /// @returns the ceil log base 2 of this APInt.
+ unsigned ceilLogBase2() const {
+ return BitWidth - (*this - 1).countLeadingZeros();
+ }
+
/// @returns the log base 2 of this APInt if its an exact power of two, -1
/// otherwise
int32_t exactLogBase2() const {