A64: Implement division in Lithium for smis

src/a64/lithium-a64.cc

Index: src/a64/lithium-a64.cc
diff --git a/src/a64/lithium-a64.cc b/src/a64/lithium-a64.cc
index e32bb2dc4ad66bd2dc6c47bc7092dab9817dce5f..62e309f2e3c9c6e7d5079b6f4b812ed5249fbba4 100644
--- a/src/a64/lithium-a64.cc
+++ b/src/a64/lithium-a64.cc
@@ -1377,22 +1377,28 @@ LInstruction* LChunkBuilder::DoDeoptimize(HDeoptimize* instr) {
 
 
 LInstruction* LChunkBuilder::DoDiv(HDiv* instr) {
-  if (instr->representation().IsInteger32()) {
-    // TODO(all): Update this case to support smi inputs.
+  if (instr->representation().IsSmiOrInteger32()) {
     ASSERT(instr->left()->representation().Equals(instr->representation()));
     ASSERT(instr->right()->representation().Equals(instr->representation()));
+
+    LOperand* dividend = UseRegister(instr->left());
+
     if (instr->RightIsPowerOf2()) {
       ASSERT(!instr->CheckFlag(HValue::kCanBeDivByZero));
-      LOperand* value = UseRegisterAtStart(instr->left());
-      LDivI* div = new(zone()) LDivI(value, UseConstant(instr->right()), NULL);
+      LOperand* divisor = UseConstant(instr->right());
+      LDivConstI* div = new(zone()) LDivConstI(dividend, divisor);
+      return AssignEnvironment(DefineAsRegister(div));
+    } else {
+      LOperand* divisor = UseRegister(instr->right());
+      LOperand* temp1 =
+          instr->CheckFlag(HInstruction::kAllUsesTruncatingToInt32)
+          ? NULL : TempRegister();
+      LOperand* temp2 = instr->representation().IsSmi() ? TempRegister() : NULL;
+      LOperand* temp3 = instr->representation().IsSmi() ? TempRegister() : NULL;
+
+      LDivI* div = new(zone()) LDivI(dividend, divisor, temp1, temp2, temp3);
       return AssignEnvironment(DefineAsRegister(div));
     }
-    LOperand* dividend = UseRegister(instr->left());
-    LOperand* divisor = UseRegister(instr->right());
-    LOperand* temp = instr->CheckFlag(HInstruction::kAllUsesTruncatingToInt32)
-        ? NULL : TempRegister();
-    LDivI* div = new(zone()) LDivI(dividend, divisor, temp);
-    return AssignEnvironment(DefineAsRegister(div));
   } else if (instr->representation().IsDouble()) {
     return DoArithmeticD(Token::DIV, instr);
   } else {