MIPS: Reland and fix "Add support for keyed-call on arrays of fast elements”.

src/mips/lithium-codegen-mips.cc

Index: src/mips/lithium-codegen-mips.cc
diff --git a/src/mips/lithium-codegen-mips.cc b/src/mips/lithium-codegen-mips.cc
index 7f6e86980872e1c79cd66f4bfdabecdfe81cf0ab..6f1ecdfc474928593ffec49ab29cb0169b4ddb0f 100644
--- a/src/mips/lithium-codegen-mips.cc
+++ b/src/mips/lithium-codegen-mips.cc
@@ -488,17 +488,36 @@ Operand LCodeGen::ToOperand(LOperand* op) {
 }
 
 
+static int ArgumentsOffsetWithoutFrame(int index) {
+  ASSERT(index < 0);
+  return -(index + 1) * kPointerSize;
+}
+
+
 MemOperand LCodeGen::ToMemOperand(LOperand* op) const {
   ASSERT(!op->IsRegister());
   ASSERT(!op->IsDoubleRegister());
   ASSERT(op->IsStackSlot() || op->IsDoubleStackSlot());
-  return MemOperand(fp, StackSlotOffset(op->index()));
+  if (NeedsEagerFrame()) {
+    return MemOperand(fp, StackSlotOffset(op->index()));
+  } else {
+    // Retrieve parameter without eager stack-frame relative to the
+    // stack-pointer.
+    return MemOperand(sp, ArgumentsOffsetWithoutFrame(op->index()));
+  }
 }
 
 
 MemOperand LCodeGen::ToHighMemOperand(LOperand* op) const {
   ASSERT(op->IsDoubleStackSlot());
-  return MemOperand(fp, StackSlotOffset(op->index()) + kPointerSize);
+  if (NeedsEagerFrame()) {
+    return MemOperand(fp, StackSlotOffset(op->index()) + kPointerSize);
+  } else {
+    // Retrieve parameter without eager stack-frame relative to the
+    // stack-pointer.
+    return MemOperand(
+        sp, ArgumentsOffsetWithoutFrame(op->index()) + kPointerSize);
+  }
 }
 
 
@@ -4015,7 +4034,12 @@ void LCodeGen::DoCallFunction(LCallFunction* instr) {
 
   int arity = instr->arity();
   CallFunctionStub stub(arity, NO_CALL_FUNCTION_FLAGS);
-  CallCode(stub.GetCode(isolate()), RelocInfo::CODE_TARGET, instr);
+  if (instr->hydrogen()->IsTailCall()) {
+    if (NeedsEagerFrame()) __ mov(sp, fp);
+    __ Jump(stub.GetCode(isolate()), RelocInfo::CODE_TARGET);
+  } else {
+    CallCode(stub.GetCode(isolate()), RelocInfo::CODE_TARGET, instr);
+  }
 }