graal/com.oracle.graal.replacements/src/com/oracle/graal/replacements/nodes/BitScanReverseNode.java

*** 53,63 ****
          int min;
          int max;
          long mask = CodeUtil.mask(valueStamp.getBits());
          int lastAlwaysSetBit = scan(valueStamp.downMask() & mask);
          if (lastAlwaysSetBit == -1) {
!             min = -1;
          } else {
              min = lastAlwaysSetBit;
          }
          int lastMaybeSetBit = scan(valueStamp.upMask() & mask);
          max = lastMaybeSetBit;
--- 53,64 ----
          int min;
          int max;
          long mask = CodeUtil.mask(valueStamp.getBits());
          int lastAlwaysSetBit = scan(valueStamp.downMask() & mask);
          if (lastAlwaysSetBit == -1) {
!             int firstMaybeSetBit = BitScanForwardNode.scan(valueStamp.upMask() & mask);
!             min = firstMaybeSetBit;
          } else {
              min = lastAlwaysSetBit;
          }
          int lastMaybeSetBit = scan(valueStamp.upMask() & mask);
          max = lastMaybeSetBit;