Reland arguments access support for inlined functions (r11109,r11118).

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 e4de40f0a8c128d76c0aa0cbf81108f354cda763..7be773e8d1b02571d4c00baa6c61c5f6853160b8 100644
--- a/src/mips/lithium-codegen-mips.cc
+++ b/src/mips/lithium-codegen-mips.cc
@@ -2651,16 +2651,20 @@ void LCodeGen::DoArgumentsElements(LArgumentsElements* instr) {
   Register temp = scratch1();
   Register result = ToRegister(instr->result());
 
-  // Check if the calling frame is an arguments adaptor frame.
-  Label done, adapted;
-  __ lw(scratch, MemOperand(fp, StandardFrameConstants::kCallerFPOffset));
-  __ lw(result, MemOperand(scratch, StandardFrameConstants::kContextOffset));
-  __ Xor(temp, result, Operand(Smi::FromInt(StackFrame::ARGUMENTS_ADAPTOR)));
-
-  // Result is the frame pointer for the frame if not adapted and for the real
-  // frame below the adaptor frame if adapted.
-  __ Movn(result, fp, temp);  // Move only if temp is not equal to zero (ne).
-  __ Movz(result, scratch, temp);  // Move only if temp is equal to zero (eq).
+  if (instr->from_inlined()) {
+    __ Subu(result, sp, 2 * kPointerSize);
+  } else {
+    // Check if the calling frame is an arguments adaptor frame.
+    Label done, adapted;
+    __ lw(scratch, MemOperand(fp, StandardFrameConstants::kCallerFPOffset));
+    __ lw(result, MemOperand(scratch, StandardFrameConstants::kContextOffset));
+    __ Xor(temp, result, Operand(Smi::FromInt(StackFrame::ARGUMENTS_ADAPTOR)));
+
+    // Result is the frame pointer for the frame if not adapted and for the real
+    // frame below the adaptor frame if adapted.
+    __ Movn(result, fp, temp);  // Move only if temp is not equal to zero (ne).
+    __ Movz(result, scratch, temp);  // Move only if temp is equal to zero (eq).
+  }
 }
 
 
@@ -2793,6 +2797,11 @@ void LCodeGen::DoPushArgument(LPushArgument* instr) {
 }
 
 
+void LCodeGen::DoDrop(LDrop* instr) {
+  __ Drop(instr->count());
+}
+
+
 void LCodeGen::DoThisFunction(LThisFunction* instr) {
   Register result = ToRegister(instr->result());
   __ LoadHeapObject(result, instr->hydrogen()->closure());