Better sequences for class id loading on ia32.

runtime/vm/assembler_ia32_test.cc

Index: runtime/vm/assembler_ia32_test.cc
===================================================================
--- runtime/vm/assembler_ia32_test.cc	(revision 38158)
+++ runtime/vm/assembler_ia32_test.cc	(working copy)
@@ -3073,14 +3073,34 @@
 
 
 ASSEMBLER_TEST_RUN(ConditionalMovesEqual, test) {
-  typedef int (*ConditionalMovesSignCode)(int i);
-  int res = reinterpret_cast<ConditionalMovesSignCode>(test->entry())(785);
+  typedef int (*ConditionalMovesEqualCode)(int i);
+  int res = reinterpret_cast<ConditionalMovesEqualCode>(test->entry())(785);
   EXPECT_EQ(1, res);
-  res = reinterpret_cast<ConditionalMovesSignCode>(test->entry())(-12);
+  res = reinterpret_cast<ConditionalMovesEqualCode>(test->entry())(-12);
   EXPECT_EQ(0, res);
 }
 
 
+// Return 1 if not equal, 0 if equal.
+ASSEMBLER_TEST_GENERATE(ConditionalMovesNotEqual, assembler) {
+  __ xorl(EAX, EAX);
+  __ movl(ECX, Immediate(1));
+  __ movl(EDX, Address(ESP, 1 * kWordSize));
+  __ cmpl(EDX, Immediate(785));
+  __ cmovne(EAX, ECX);
+  __ ret();
+}
+
+
+ASSEMBLER_TEST_RUN(ConditionalMovesNotEqual, test) {
+  typedef int (*ConditionalMovesNotEqualCode)(int i);
+  int res = reinterpret_cast<ConditionalMovesNotEqualCode>(test->entry())(785);
+  EXPECT_EQ(0, res);
+  res = reinterpret_cast<ConditionalMovesNotEqualCode>(test->entry())(-12);
+  EXPECT_EQ(1, res);
+}
+
+
 ASSEMBLER_TEST_GENERATE(ConditionalMovesCompare, assembler) {
   __ movl(EDX, Immediate(1));  // Greater equal.
   __ movl(ECX, Immediate(-1));  // Less