Switchable call scheduling.

runtime/vm/code_patcher_x64.cc

Index: runtime/vm/code_patcher_x64.cc
diff --git a/runtime/vm/code_patcher_x64.cc b/runtime/vm/code_patcher_x64.cc
index 8e3e8898fd99f5bc7c35c912241310cabefa1f6e..0426ae785ffc090047f9e1c75dd62cb95e7cf7d9 100644
--- a/runtime/vm/code_patcher_x64.cc
+++ b/runtime/vm/code_patcher_x64.cc
@@ -207,9 +207,9 @@ class SwitchableCall : public ValueObject {
 
   bool IsValid() const {
     static int16_t pattern[kCallPatternSize] = {
-      0x49, 0x8b, 0x9f, -1, -1, -1, -1,  // movq rbx, [PP + cache_offs]
       0x4d, 0x8b, 0xa7, -1, -1, -1, -1,  // movq r12, [PP + code_offs]
       0x49, 0x8b, 0x4c, 0x24, 0x0f,      // movq rcx, [r12 + entrypoint_off]
+      0x49, 0x8b, 0x9f, -1, -1, -1, -1,  // movq rbx, [PP + cache_offs]
       0xff, 0xd1,                        // call rcx
     };
     ASSERT(ARRAY_SIZE(pattern) == kCallPatternSize);
@@ -217,10 +217,10 @@ class SwitchableCall : public ValueObject {
   }
 
   intptr_t data_index() const {
-    return IndexFromPPLoad(start_ + 3);
+    return IndexFromPPLoad(start_ + 15);
   }
   intptr_t target_index() const {
-    return IndexFromPPLoad(start_ + 10);
+    return IndexFromPPLoad(start_ + 3);
   }
 
   RawObject* data() const {