Revert "VM: New calling convention for generated code."

runtime/vm/instructions_ia32.h

Index: runtime/vm/instructions_ia32.h
diff --git a/runtime/vm/instructions_ia32.h b/runtime/vm/instructions_ia32.h
index 9cf5243311e768159e13aa1905e7a54b2b12f617..1a839c84dec8a0e6592ab2038c34bcee0e35bef2 100644
--- a/runtime/vm/instructions_ia32.h
+++ b/runtime/vm/instructions_ia32.h
@@ -104,6 +104,23 @@ class CallPattern : public CallOrJumpPattern<CallPattern> {
 };
 
 
+class JumpPattern : public CallOrJumpPattern<JumpPattern> {
+ public:
+  JumpPattern(uword pc, const Code& code) : CallOrJumpPattern(pc) {}
+
+  static int pattern_length_in_bytes() { return kLengthInBytes; }
+  static const int* pattern() {
+    static const int kJumpPattern[kLengthInBytes] = {0xE9, -1, -1, -1, -1};
+    return kJumpPattern;
+  }
+
+ private:
+  static const int kLengthInBytes = 5;
+
+  DISALLOW_COPY_AND_ASSIGN(JumpPattern);
+};
+
+
 class ReturnPattern : public InstructionPattern<ReturnPattern> {
  public:
   explicit ReturnPattern(uword pc) : InstructionPattern(pc) {}