diff options
Diffstat (limited to 'chapter07/src/main/java/com/seaofnodes')
| -rw-r--r-- | chapter07/src/main/java/com/seaofnodes/simple/node/SubNode.java | 7 |
1 files changed, 4 insertions, 3 deletions
diff --git a/chapter07/src/main/java/com/seaofnodes/simple/node/SubNode.java b/chapter07/src/main/java/com/seaofnodes/simple/node/SubNode.java index 98aa679f..af66b950 100644 --- a/chapter07/src/main/java/com/seaofnodes/simple/node/SubNode.java +++ b/chapter07/src/main/java/com/seaofnodes/simple/node/SubNode.java @@ -21,15 +21,16 @@ public class SubNode extends Node { @Override public Type compute() { + // Sub of same is 0 + if( in(1)==in(2) ) + return TypeInteger.ZERO; + if (in(1)._type instanceof TypeInteger i0 && in(2)._type instanceof TypeInteger i1) { if (i0.isConstant() && i1.isConstant()) return TypeInteger.constant(i0.value()-i1.value()); return i0.meet(i1); } - // Sub of same is 0 - if( in(1)==in(2) ) - return TypeInteger.ZERO; return Type.BOTTOM; } |