Use UnboxedInt32 and UnboxedUint32 representation for LoadIndexedInstr

runtime/vm/assembler_x64_test.cc

Index: runtime/vm/assembler_x64_test.cc
diff --git a/runtime/vm/assembler_x64_test.cc b/runtime/vm/assembler_x64_test.cc
index 1d599485f43ea62dbe548cb57d166f00569b4e59..254099c807911b57d3fd9a6d16bc56bfbde571da 100644
--- a/runtime/vm/assembler_x64_test.cc
+++ b/runtime/vm/assembler_x64_test.cc
@@ -2439,18 +2439,20 @@ ASSEMBLER_TEST_RUN(DoubleFPOperations, test) {
 
 
 ASSEMBLER_TEST_GENERATE(Int32ToDoubleConversion, assembler) {
-  __ movl(RDX, Immediate(6));
-  __ cvtsi2sd(XMM0, RDX);
-  __ movl(RDX, Immediate(8));
-  __ cvtsi2sd(XMM8, RDX);
+  // Fill upper bits with garbage.
+  __ movq(RDX, Immediate(0x1111111100000006));
+  __ cvtsi2sd32(XMM0, RDX);
+  // Fill upper bits with garbage.
+  __ movq(RDX, Immediate(0x2222222200000008));
+  __ cvtsi2sd32(XMM8, RDX);
   __ subsd(XMM0, XMM8);
   __ ret();
 }
 
 
 ASSEMBLER_TEST_RUN(Int32ToDoubleConversion, test) {
-  typedef double (*IntToDoubleConversionCode)();
-  double res = reinterpret_cast<IntToDoubleConversionCode>(test->entry())();
+  typedef double (*Int32ToDoubleConversion)();
+  double res = reinterpret_cast<Int32ToDoubleConversion>(test->entry())();
   EXPECT_FLOAT_EQ(-2.0, res, 0.001);
 }