Improve dead phi elimination....

src/hydrogen-instructions.cc

Index: src/hydrogen-instructions.cc
===================================================================
--- src/hydrogen-instructions.cc	(revision 7081)
+++ src/hydrogen-instructions.cc	(working copy)
@@ -933,6 +933,18 @@
 }
 
 
+bool HPhi::HasRealUses() {

[Kevin Millikin (Chromium), 2011/03/08 08:51:03]

The boolean variable seems too much:

for (...) {
  if (!uses()->at(i)->IsPhi()) return true;
}
return false;

[fschneider, 2011/03/08 10:03:39]

Done.

+  bool result = false;
+  for (int i = 0; i < uses()->length(); i++) {
+    if (!uses()->at(i)->IsPhi()) {
+      result = true;
+      break;
+    }
+  }
+  return result;
+}
+
+
 HValue* HPhi::GetRedundantReplacement() {
   HValue* candidate = NULL;
   int count = OperandCount();