Harmony: optimize Math.clz32.

src/hydrogen.cc

Index: src/hydrogen.cc
diff --git a/src/hydrogen.cc b/src/hydrogen.cc
index b471faa9b27e8b38617d4759ff5ffa6f414593fd..d40c37b0685ed649d6af811fd92c65b00b12645c 100644
--- a/src/hydrogen.cc
+++ b/src/hydrogen.cc
@@ -7459,6 +7459,7 @@ bool HOptimizedGraphBuilder::TryInlineBuiltinFunctionCall(Call* expr) {
     case kMathAbs:
     case kMathSqrt:
     case kMathLog:
+    case kMathClz32:
       if (expr->arguments()->length() == 1) {
         HValue* argument = Pop();
         Drop(2);  // Receiver and function.
@@ -7529,6 +7530,7 @@ bool HOptimizedGraphBuilder::TryInlineBuiltinMethodCall(
     case kMathAbs:
     case kMathSqrt:
     case kMathLog:
+    case kMathClz32:
       if (argument_count == 2) {
         HValue* argument = Pop();
         Drop(2);  // Receiver and function.