Pass key and receiver in registers for keyed load IC on ARM...

src/arm/stub-cache-arm.cc

Index: src/arm/stub-cache-arm.cc
===================================================================
--- src/arm/stub-cache-arm.cc	(revision 4607)
+++ src/arm/stub-cache-arm.cc	(working copy)
@@ -1813,8 +1813,7 @@
   // ----------- S t a t e -------------
   //  -- lr    : return address
   //  -- r0    : key
-  //  -- sp[0] : key
-  //  -- sp[4] : receiver
+  //  -- r1    : receiver
   // -----------------------------------
   Label miss;
 
@@ -1822,7 +1821,6 @@
   __ cmp(r0, Operand(Handle<String>(name)));
   __ b(ne, &miss);
 
-  __ ldr(r1, MemOperand(sp, kPointerSize));  // Receiver.
   GenerateLoadField(receiver, holder, r1, r2, r3, index, name, &miss);
   __ bind(&miss);
   GenerateLoadMiss(masm(), Code::KEYED_LOAD_IC);
@@ -1838,8 +1836,7 @@
   // ----------- S t a t e -------------
   //  -- lr    : return address
   //  -- r0    : key
-  //  -- sp[0] : key
-  //  -- sp[4] : receiver
+  //  -- r1    : receiver
   // -----------------------------------
   Label miss;
 
@@ -1848,7 +1845,6 @@
   __ b(ne, &miss);
 
   Failure* failure = Failure::InternalError();
-  __ ldr(r1, MemOperand(sp, kPointerSize));  // Receiver.
   bool success = GenerateLoadCallback(receiver, holder, r1, r0, r2, r3,
                                       callback, name, &miss, &failure);
   if (!success) return failure;
@@ -1867,8 +1863,7 @@
   // ----------- S t a t e -------------
   //  -- lr    : return address
   //  -- r0    : key
-  //  -- sp[0] : key
-  //  -- sp[4] : receiver
+  //  -- r1    : receiver
   // -----------------------------------
   Label miss;
 
@@ -1876,7 +1871,6 @@
   __ cmp(r0, Operand(Handle<String>(name)));
   __ b(ne, &miss);
 
-  __ ldr(r1, MemOperand(sp, kPointerSize));  // Receiver.
   GenerateLoadConstant(receiver, holder, r1, r2, r3, value, name, &miss);
   __ bind(&miss);
   GenerateLoadMiss(masm(), Code::KEYED_LOAD_IC);
@@ -1892,8 +1886,7 @@
   // ----------- S t a t e -------------
   //  -- lr    : return address
   //  -- r0    : key
-  //  -- sp[0] : key
-  //  -- sp[4] : receiver
+  //  -- r1    : receiver
   // -----------------------------------
   Label miss;
 
@@ -1903,7 +1896,6 @@
 
   LookupResult lookup;
   LookupPostInterceptor(holder, name, &lookup);
-  __ ldr(r1, MemOperand(sp, kPointerSize));  // Receiver.
   GenerateLoadInterceptor(receiver,
                           holder,
                           &lookup,
@@ -1924,8 +1916,7 @@
   // ----------- S t a t e -------------
   //  -- lr    : return address
   //  -- r0    : key
-  //  -- sp[0] : key
-  //  -- sp[4] : receiver
+  //  -- r1    : receiver
   // -----------------------------------
   Label miss;
 
@@ -1933,7 +1924,6 @@
   __ cmp(r0, Operand(Handle<String>(name)));
   __ b(ne, &miss);
 
-  __ ldr(r1, MemOperand(sp, kPointerSize));  // Receiver.
   GenerateLoadArrayLength(masm(), r1, r2, &miss);
   __ bind(&miss);
   GenerateLoadMiss(masm(), Code::KEYED_LOAD_IC);
@@ -1946,8 +1936,7 @@
   // ----------- S t a t e -------------
   //  -- lr    : return address
   //  -- r0    : key
-  //  -- sp[0] : key
-  //  -- sp[4] : receiver
+  //  -- r1    : receiver
   // -----------------------------------
   Label miss;
   __ IncrementCounter(&Counters::keyed_load_string_length, 1, r1, r3);
@@ -1956,7 +1945,6 @@
   __ cmp(r0, Operand(Handle<String>(name)));
   __ b(ne, &miss);
 
-  __ ldr(r1, MemOperand(sp, kPointerSize));  // Receiver.
   GenerateLoadStringLength(masm(), r1, r2, r3, &miss);
   __ bind(&miss);
   __ DecrementCounter(&Counters::keyed_load_string_length, 1, r1, r3);
@@ -1972,8 +1960,7 @@
   // ----------- S t a t e -------------
   //  -- lr    : return address
   //  -- r0    : key
-  //  -- sp[0] : key
-  //  -- sp[4] : receiver
+  //  -- r1    : receiver
   // -----------------------------------
   GenerateLoadMiss(masm(), Code::KEYED_LOAD_IC);