Setup valid pool pointer in assembler tests

runtime/vm/assembler_x64_test.cc

 // Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 #include "vm/globals.h"
 #if defined(TARGET_ARCH_X64)
 
 #include "vm/assembler.h"
 #include "vm/os.h"
 #include "vm/unit_test.h"
@@ skipping 1455 matching lines @@
   double res = reinterpret_cast<PackedDoubleSub>(test->entry())();
   EXPECT_FLOAT_EQ(-2.0, res, 0.000001f);
 }
 
 
 ASSEMBLER_TEST_GENERATE(PackedDoubleNegate, assembler) {
   static const struct ALIGN16 {
     double a;
     double b;
   } constant0 = { 1.0, 2.0 };
+  __ pushq(PP);  // Save caller's pool pointer and load a new one here.
+  __ LoadPoolPointer(PP);
   __ movq(RAX, Immediate(reinterpret_cast<uword>(&constant0)));
   __ movups(XMM10, Address(RAX, 0));
   __ negatepd(XMM10);
   __ movaps(XMM0, XMM10);
+  __ popq(PP);  // Restore caller's pool pointer.
   __ ret();
 }
 
 
 ASSEMBLER_TEST_RUN(PackedDoubleNegate, test) {
   typedef double (*PackedDoubleNegate)();
   double res = reinterpret_cast<PackedDoubleNegate>(test->entry())();
   EXPECT_FLOAT_EQ(-1.0, res, 0.000001f);
 }
 
 
 ASSEMBLER_TEST_GENERATE(PackedDoubleAbsolute, assembler) {
   static const struct ALIGN16 {
     double a;
     double b;
   } constant0 = { -1.0, 2.0 };
+  __ pushq(PP);  // Save caller's pool pointer and load a new one here.
+  __ LoadPoolPointer(PP);
   __ movq(RAX, Immediate(reinterpret_cast<uword>(&constant0)));
   __ movups(XMM10, Address(RAX, 0));
   __ abspd(XMM10);
   __ movaps(XMM0, XMM10);
+  __ popq(PP);  // Restore caller's pool pointer.
   __ ret();
 }
 
 
 ASSEMBLER_TEST_RUN(PackedDoubleAbsolute, test) {
   typedef double (*PackedDoubleAbsolute)();
   double res = reinterpret_cast<PackedDoubleAbsolute>(test->entry())();
   EXPECT_FLOAT_EQ(1.0, res, 0.000001f);
 }
 
@@ skipping 1404 matching lines @@
   EXPECT_EQ(1, res);  // Greater equal.
   res = reinterpret_cast<ConditionalMovesCompareCode>(test->entry())(5, 5);
   EXPECT_EQ(1, res);  // Greater equal.
   res = reinterpret_cast<ConditionalMovesCompareCode>(test->entry())(2, 5);
   EXPECT_EQ(-1, res);  // Less.
 }
 
 }  // namespace dart
 
 #endif  // defined TARGET_ARCH_X64