Add unboxed Mint for X64

runtime/vm/intermediate_language_arm.cc

Index: runtime/vm/intermediate_language_arm.cc
diff --git a/runtime/vm/intermediate_language_arm.cc b/runtime/vm/intermediate_language_arm.cc
index 273cf851aaafb39bfe096a21117297193a4383b1..dabacbf0ca0d357e8f210a84b90b4e0c365bca56 100644
--- a/runtime/vm/intermediate_language_arm.cc
+++ b/runtime/vm/intermediate_language_arm.cc
@@ -6281,15 +6281,6 @@ void ShiftMintOpInstr::EmitNativeCode(FlowGraphCompiler* compiler) {
     ASSERT(locs()->in(1).constant().IsSmi());
     const int32_t shift =
         reinterpret_cast<int32_t>(locs()->in(1).constant().raw()) >> 1;
-    if ((shift < 0) || (shift > kMintShiftCountLimit)) {
-      __ b(deopt);
-      return;
-    } else if (shift == 0) {
-      // Nothing to do for zero shift amount.
-      __ mov(out_lo, Operand(left_lo));
-      __ mov(out_hi, Operand(left_hi));
-      return;
-    }
     switch (op_kind()) {
       case Token::kSHR: {
         if (shift < 32) {
@@ -6521,13 +6512,7 @@ void ShiftUint32OpInstr::EmitNativeCode(FlowGraphCompiler* compiler) {
     const intptr_t shift_value = Smi::Cast(constant).Value();
 
     // Check constant shift value.
-    if (shift_value == 0) {
-      // Nothing to do.
-      __ mov(out, Operand(left));
-    } else if (shift_value < 0) {
-      // Invalid shift value.
-      __ b(deopt);
-    } else if (shift_value > kShifterLimit) {
+    if (shift_value > kShifterLimit) {

[Vyacheslav Egorov (Google), 2014/10/07 12:03:50]

Can't this also be handled in Canonicalize just like other cases?

If it's not handled yet, please just move there so that all platforms will
benefit.

[Cutch, 2014/10/21 17:42:11]

Done.

       // Result is 0.
       __ eor(out, out, Operand(out));
     } else {