From 703f88dbb2e1e4352a0725b7e742151739b82ea1 Mon Sep 17 00:00:00 2001 From: Cliff Click Date: Fri, 13 Sep 2024 09:23:19 -0700 Subject: x-x==0 Move x-x==0 to compute. Add x/1 ==> x All chapters --- chapter11/src/main/java/com/seaofnodes/simple/node/DivNode.java | 7 ++++++- chapter11/src/main/java/com/seaofnodes/simple/node/SubNode.java | 7 +++---- 2 files changed, 9 insertions(+), 5 deletions(-) (limited to 'chapter11/src/main/java') diff --git a/chapter11/src/main/java/com/seaofnodes/simple/node/DivNode.java b/chapter11/src/main/java/com/seaofnodes/simple/node/DivNode.java index ba06d037..08ce70b8 100644 --- a/chapter11/src/main/java/com/seaofnodes/simple/node/DivNode.java +++ b/chapter11/src/main/java/com/seaofnodes/simple/node/DivNode.java @@ -32,7 +32,12 @@ public class DivNode extends Node { } @Override - public Node idealize() { return null; } + public Node idealize() { + // Div of 1. + if( in(2)._type.isConstant() && in(2)._type instanceof TypeInteger i && i.value()==1 ) + return in(1); + return null; + } @Override Node copy(Node lhs, Node rhs) { return new DivNode(lhs,rhs); } } diff --git a/chapter11/src/main/java/com/seaofnodes/simple/node/SubNode.java b/chapter11/src/main/java/com/seaofnodes/simple/node/SubNode.java index 7137f38e..128678a7 100644 --- a/chapter11/src/main/java/com/seaofnodes/simple/node/SubNode.java +++ b/chapter11/src/main/java/com/seaofnodes/simple/node/SubNode.java @@ -27,15 +27,14 @@ public class SubNode extends Node { if (i0.isConstant() && i1.isConstant()) return TypeInteger.constant(i0.value()-i1.value()); } + // Sub of same is 0 + if( in(1)==in(2) ) + return TypeInteger.ZERO; return in(1)._type.meet(in(2)._type); } @Override public Node idealize() { - // Sub of same is 0 - if( in(1)==in(2) ) - return Parser.ZERO; - // x - (-y) is x+y if( in(2) instanceof MinusNode minus ) return new AddNode(in(1),minus.in(1)); -- cgit v1.2.3