[Interpreter] Add support for JS calls.

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 56260804806fd904a506bf5c776b2ee7005cf200..b444900f581850e2cfecb19d60472602208ad23b 100644
--- a/src/compiler/x64/code-generator-x64.cc
+++ b/src/compiler/x64/code-generator-x64.cc
@@ -1238,6 +1238,20 @@ void CodeGenerator::AssembleArchInstruction(Instruction* instr) {
       }
       break;
     }
+    case kX64PushMultiple: {
+      Register args_start = i.InputRegister(0);
+      Register args_end = i.InputRegister(1);
+      Label loop_header, loop_check;
+      __ j(always, &loop_check);
+      __ bind(&loop_header);
+      __ movp(kScratchRegister, Operand(args_start, 0));

[Benedikt Meurer, 2015/09/07 05:14:30]

This sequence is probably not x32 safe. You should just use
Push(Operand(args_start, 0)) instead.

+      __ pushq(kScratchRegister);
+      __ subp(args_start, Immediate(kPointerSize));
+      __ bind(&loop_check);
+      __ cmpp(args_start, args_end);
+      __ j(greater, &loop_header, Label::kNear);
+      break;
+    }
     case kX64StoreWriteBarrier: {
       Register object = i.InputRegister(0);
       Register value = i.InputRegister(2);