VM: Enable branch merging of isnan, isinf.

runtime/vm/intermediate_language.cc

Index: runtime/vm/intermediate_language.cc
diff --git a/runtime/vm/intermediate_language.cc b/runtime/vm/intermediate_language.cc
index c3359f1f23fe46637922f5369b64a07f62f3c7f3..c2a59e5a102d9957aa4b5e70e24f3965624cc30c 100644
--- a/runtime/vm/intermediate_language.cc
+++ b/runtime/vm/intermediate_language.cc
@@ -3022,13 +3022,13 @@ StrictCompareInstr::StrictCompareInstr(TokenPosition token_pos,
                                        Value* left,
                                        Value* right,
                                        bool needs_number_check)
-    : ComparisonInstr(token_pos,
+    : TemplateComparison(token_pos,
                       kind,

[zra, 2016/10/31 17:28:14]

weird indent

[Florian Schneider, 2016/10/31 18:48:16]

Done.

-                      left,
-                      right,
                       Thread::Current()->GetNextDeoptId()),
       needs_number_check_(needs_number_check) {
   ASSERT((kind == Token::kEQ_STRICT) || (kind == Token::kNE_STRICT));
+  SetInputAt(0, left);
+  SetInputAt(1, right);
 }
 
 
@@ -3424,6 +3424,13 @@ void Environment::DeepCopyToOuter(Zone* zone, Instruction* instr) const {
 }
 
 
+ComparisonInstr* DoubleTestOpInstr::CopyWithNewOperands(Value* new_left,
+                                                        Value* new_right) {
+  UNREACHABLE();
+  return NULL;
+}
+
+
 ComparisonInstr* EqualityCompareInstr::CopyWithNewOperands(Value* new_left,
                                                            Value* new_right) {
   return new EqualityCompareInstr(token_pos(),