Add support for long-to-int in the optimizing compiler.

- Add support for the long-to-int Dex instruction in the
  optimizing compiler.
- Generate x86, x86-64 and ARM (but not ARM64) code for
  long-to-int HTypeConversion nodes.
- Add related tests to test/422-type-conversion.
- Also fix comments in test/415-optimizing-arith-neg and
  in test/416-optimizing-arith-not.

Change-Id: I3084af30f2a495d178362ae1154dc7ceb7bf3a58

1 files changed, 17 insertions, 0 deletions

diff --git a/compiler/optimizing/codegen_test.cc b/compiler/optimizing/codegen_test.cc
index ecee44392e..de2253b6fe 100644
--- a/compiler/optimizing/codegen_test.cc
+++ b/compiler/optimizing/codegen_test.cc
@@ -362,6 +362,23 @@ NOT_LONG_TEST(ReturnNotLongINT64_MAX,
 
 #undef NOT_LONG_TEST
 
+TEST(CodegenTest, IntToLongOfLongToInt) {
+  const int64_t input = INT64_C(4294967296);            // 2^32
+  const uint16_t word0 = Low16Bits(Low32Bits(input));   // LSW.
+  const uint16_t word1 = High16Bits(Low32Bits(input));
+  const uint16_t word2 = Low16Bits(High32Bits(input));
+  const uint16_t word3 = High16Bits(High32Bits(input)); // MSW.
+  const uint16_t data[] = FIVE_REGISTERS_CODE_ITEM(
+      Instruction::CONST_WIDE | 0 << 8, word0, word1, word2, word3,
+      Instruction::CONST_WIDE | 2 << 8, 1, 0, 0, 0,
+      Instruction::ADD_LONG | 0, 0 << 8 | 2,            // v0 <- 2^32 + 1
+      Instruction::LONG_TO_INT | 4 << 8 | 0 << 12,
+      Instruction::INT_TO_LONG | 2 << 8 | 4 << 12,
+      Instruction::RETURN_WIDE | 2 << 8);
+
+  TestCodeLong(data, true, 1);
+}
+
 TEST(CodegenTest, ReturnAdd1) {
   const uint16_t data[] = TWO_REGISTERS_CODE_ITEM(
     Instruction::CONST_4 | 3 << 12 | 0,