Inline Math.sqrt in new compilers.

runtime/vm/flow_graph_compiler_ia32.cc

Index: runtime/vm/flow_graph_compiler_ia32.cc
===================================================================
--- runtime/vm/flow_graph_compiler_ia32.cc	(revision 8700)
+++ runtime/vm/flow_graph_compiler_ia32.cc	(working copy)
@@ -71,6 +71,30 @@
 }
 
 
+void FlowGraphCompiler::GenerateInlinedMathSqrt(Label* done) {
+  Label smi_to_double, double_op, call_method;
+  __ movl(EAX, Address(ESP, 0));
+  __ testl(EAX, Immediate(kSmiTagMask));
+  __ j(ZERO, &smi_to_double);
+  __ CompareClassId(EAX, kDouble, EBX);
+  __ j(NOT_EQUAL, &call_method);
+  __ movsd(XMM1, FieldAddress(EAX, Double::value_offset()));
+  __ Bind(&double_op);
+  __ sqrtsd(XMM0, XMM1);
+  AssemblerMacros::TryAllocate(assembler_,
+                               double_class_,
+                               &call_method,
+                               EAX);  // Result register.
+  __ movsd(FieldAddress(EAX, Double::value_offset()), XMM0);
+  __ jmp(done);
+  __ Bind(&smi_to_double);
+  __ SmiUntag(EAX);
+  __ cvtsi2sd(XMM1, EAX);
+  __ jmp(&double_op);
+  __ Bind(&call_method);
+}
+
+
 void FlowGraphCompiler::GenerateCallRuntime(intptr_t cid,
                                             intptr_t token_index,
                                             intptr_t try_index,