Range feedback for binary integer operations.

runtime/vm/assembler_ia32_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_IA32)
 
 #include "vm/assembler.h"
 #include "vm/cpu.h"
 #include "vm/os.h"
@@ skipping 3381 matching lines @@
   __ ret();
 }
 
 
 ASSEMBLER_TEST_RUN(BitTest, test) {
   typedef int (*BitTest)();
   EXPECT_EQ(1, reinterpret_cast<BitTest>(test->entry())());
 }
 
 
+ASSEMBLER_TEST_GENERATE(ComputeRange, assembler) {
+  Label miss, done;
+  __ movl(ECX, Address(ESP, 1 * kWordSize));
+
+  __ pushl(ESI);
+  __ pushl(EDI);
+  __ ComputeRange(EAX, ECX, ESI, EDI, &miss);
+  __ jmp(&done);
+
+  __ Bind(&miss);
+  __ movl(EAX, Immediate(-1));
+
+  __ Bind(&done);
+  __ popl(EDI);
+  __ popl(ESI);
+  __ ret();
+}
+
+
+ASSEMBLER_TEST_RUN(ComputeRange, test) {
+  typedef intptr_t (*ComputeRange)(RawObject* value);
+  ComputeRange range_of = reinterpret_cast<ComputeRange>(test->entry());
+
+  EXPECT_EQ(0, range_of(Smi::New(0)));
+  EXPECT_EQ(0, range_of(Smi::New(1)));
+  EXPECT_EQ(ICData::kSignBit, range_of(Smi::New(-1)));
+  EXPECT_EQ(0, range_of(Smi::New(Smi::kMaxValue)));
+  EXPECT_EQ(ICData::kSignBit, range_of(Smi::New(Smi::kMinValue)));
+
+  EXPECT_EQ(ICData::kInt32Bit, range_of(Integer::New(Smi::kMaxValue + 1)));
+  EXPECT_EQ(ICData::kInt32Bit | ICData::kSignBit,
+            range_of(Integer::New(Smi::kMinValue - 1)));
+  EXPECT_EQ(ICData::kInt32Bit, range_of(Integer::New(kMaxInt32)));
+  EXPECT_EQ(ICData::kInt32Bit | ICData::kSignBit,
+            range_of(Integer::New(kMinInt32)));
+
+  EXPECT_EQ(ICData::kUint32Bit,
+            range_of(Integer::New(static_cast<int64_t>(kMaxInt32) + 1)));
+  EXPECT_EQ(ICData::kUint32Bit, range_of(Integer::New(kMaxUint32)));
+
+  EXPECT_EQ(ICData::kInt64Bit,
+            range_of(Integer::New(static_cast<int64_t>(kMaxUint32) + 1)));
+  EXPECT_EQ(ICData::kInt64Bit,
+            range_of(Integer::New(static_cast<int64_t>(kMinInt32) - 1)));
+  EXPECT_EQ(ICData::kInt64Bit, range_of(Integer::New(kMaxInt64)));
+  EXPECT_EQ(ICData::kInt64Bit, range_of(Integer::New(kMinInt64)));
+
+  EXPECT_EQ(-1, range_of(Bool::True().raw()));
+}
+
+
 }  // namespace dart
 
 #endif  // defined TARGET_ARCH_IA32