X64 Crankshaft: Implement MathRound, MathFloor, MathSqrt, and MathPowHalf Una...

src/ia32/lithium-ia32.cc

Index: src/ia32/lithium-ia32.cc
===================================================================
--- src/ia32/lithium-ia32.cc	(revision 6849)
+++ src/ia32/lithium-ia32.cc	(working copy)
@@ -1223,7 +1223,7 @@
       case kMathSqrt:
         return DefineSameAsFirst(result);
       case kMathPowHalf:
-        return AssignEnvironment(DefineSameAsFirst(result));
+        return DefineSameAsFirst(result);
       default:
         UNREACHABLE();
         return NULL;