New linear scan allocator.

runtime/vm/intermediate_language_x64.cc

Index: runtime/vm/intermediate_language_x64.cc
diff --git a/runtime/vm/intermediate_language_x64.cc b/runtime/vm/intermediate_language_x64.cc
index 1db3c598dacc6ee128ae69dd2376b0d4570223f4..b50d4c524f93425150ebc8fb6e0cbfd8e29af7b6 100644
--- a/runtime/vm/intermediate_language_x64.cc
+++ b/runtime/vm/intermediate_language_x64.cc
@@ -501,8 +501,7 @@ LocationSummary* RelationalOpComp::MakeLocationSummary() const {
     const intptr_t kNumInputs = 2;
     const intptr_t kNumTemps = 1;
     LocationSummary* summary = new LocationSummary(kNumInputs,
-                                                   kNumTemps,
-                                                   LocationSummary::kCall);
+                                                   kNumTemps);
     summary->set_in(0, Location::RequiresRegister());
     summary->set_in(1, Location::RequiresRegister());
     summary->set_out(Location::RequiresRegister());
@@ -1456,7 +1455,7 @@ LocationSummary* CheckStackOverflowComp::MakeLocationSummary() const {
   LocationSummary* summary = new LocationSummary(kNumInputs,
                                                  kNumTemps,
                                                  LocationSummary::kCall);
-  summary->set_temp(0, Location::RequiresRegister());
+  summary->set_temp(0, Location::RegisterLocation(R10));

[srdjan, 2012/07/22 15:09:24]

Why R10?

[Vyacheslav Egorov (Google), 2012/07/24 12:26:42]

It should be any fixed register. Replaced with RAX.

   return summary;
 }