We want the number of bits needed, not the power of 2.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@35977 91177308-0d34-0410-b5e6-96231b3b80d8

diff --git a/lib/Support/APInt.cpp b/lib/Support/APInt.cpp
index a35b116b42e4316da3a19d3f680148b2066317cf..d7933fc5a387cdeed2167c2e5979440d79a03514 100644 (file)
--- a/lib/Support/APInt.cpp
+++ b/lib/Support/APInt.cpp
@@ -693,7 +693,7 @@ uint32_t APInt::getBitsNeeded(const char* str, uint32_t slen, uint8_t radix) {
   APInt tmp(sufficient, str, slen, radix);
 
   // Compute how many bits are required.
-  return isNegative + tmp.logBase2();
+  return isNegative + tmp.logBase2() + 1;
 }
 
 uint64_t APInt::getHashValue() const {