From a1fd6acc923db555c62f2fcf251d4b71f8569c4d Mon Sep 17 00:00:00 2001
From: David Majda <david@majda.cz>
Date: Fri, 6 Jul 2012 15:02:46 +0200
Subject: [PATCH] Do not compute |resultIndex| for "rule" nodes

Computing |resultIndex| for their expressions is enough.
---
 src/compiler/passes/allocate-registers.js | 3 +--
 src/compiler/passes/generate-code.js      | 4 ++--
 2 files changed, 3 insertions(+), 4 deletions(-)

diff --git a/src/compiler/passes/allocate-registers.js b/src/compiler/passes/allocate-registers.js
index aee8c50..c6e1d8d 100644
--- a/src/compiler/passes/allocate-registers.js
+++ b/src/compiler/passes/allocate-registers.js
@@ -42,7 +42,6 @@ PEG.compiler.passes.allocateRegisters = function(ast) {
     grammar:
       function(node, index) {
         each(node.rules, function(node) {
-          node.resultIndex = index;
           compute(node, index);
         });
       },
@@ -51,7 +50,7 @@ PEG.compiler.passes.allocateRegisters = function(ast) {
       function(node, index) {
         var depth;
 
-        node.expression.resultIndex = node.resultIndex;
+        node.expression.resultIndex = index;
 
         depth = compute(node.expression, index);
 
diff --git a/src/compiler/passes/generate-code.js b/src/compiler/passes/generate-code.js
index 1575fc5..93c6a67 100644
--- a/src/compiler/passes/generate-code.js
+++ b/src/compiler/passes/generate-code.js
@@ -567,10 +567,10 @@ PEG.compiler.passes.generateCode = function(ast, options) {
             '    ',
             '    cache[cacheKey] = {',
             '      nextPos: #{posClone("pos")},',
-            '      result:  #{r(node.resultIndex)}',
+            '      result:  #{r(node.expression.resultIndex)}',
             '    };',
             '  #end',
-            '  return #{r(node.resultIndex)};',
+            '  return #{r(node.expression.resultIndex)};',
             '}'
           ],
           named: [