ARM: Fix lithium codegeneration of TypeofIs

The previous implementation was incomplete and wrong.

TBR=karlklose@chromium.org
Review URL: http://codereview.chromium.org/6113003

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@6231 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

src/arm/lithium-codegen-arm.cc

@@ -2484,10 +2484,15 @@ void LCodeGen::DoTypeofIs(LTypeofIs* instr) {
                                                   &false_label,
                                                   input,
                                                   instr->type_literal());
+  __ b(final_branch_condition, &true_label);
+  __ bind(&false_label);
+  __ LoadRoot(result, Heap::kFalseValueRootIndex);
+  __ b(&done);
+
+  __ bind(&true_label);
+  __ LoadRoot(result, Heap::kTrueValueRootIndex);
 
-  __ LoadRoot(result, Heap::kTrueValueRootIndex, final_branch_condition);
-  __ LoadRoot(result, Heap::kFalseValueRootIndex,
-              NegateCondition(final_branch_condition));
+  __ bind(&done);
 }