[turbofan] IA: Float64ToUint32 supports mem operand

src/compiler/x64/code-generator-x64.cc

Index: src/compiler/x64/code-generator-x64.cc
diff --git a/src/compiler/x64/code-generator-x64.cc b/src/compiler/x64/code-generator-x64.cc
index f93ad21a219a09c0ca51f556dbf9d457a8a58ad1..1c2d3ee88535559fe4c737d5c39ff6d0b139e18d 100644
--- a/src/compiler/x64/code-generator-x64.cc
+++ b/src/compiler/x64/code-generator-x64.cc
@@ -469,11 +469,13 @@ void CodeGenerator::AssembleArchInstruction(Instruction* instr) {
       break;
     }
     case kSSEFloat64ToUint32: {
-      // TODO(turbofan): X64 SSE cvttsd2siq should support operands.
-      __ cvttsd2siq(i.OutputRegister(), i.InputDoubleRegister(0));
+      RegisterOrOperand input = i.InputRegisterOrOperand(0);
+      if (input.type == kDoubleRegister) {
+        __ cvttsd2siq(i.OutputRegister(), input.double_reg);
+      } else {
+        __ cvttsd2siq(i.OutputRegister(), input.operand);
+      }
       __ andl(i.OutputRegister(), i.OutputRegister());  // clear upper bits.
-      // TODO(turbofan): generated code should not look at the upper 32 bits
-      // of the result, but those bits could escape to the outside world.
       break;
     }
     case kSSEInt32ToFloat64: {