Out-of-line constant pool on Arm: Stage 1 - Free up r7 for use as constant pool pointer register

src/arm/lithium-codegen-arm.cc

 // Copyright 2012 the V8 project authors. All rights reserved.
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
 //
 //     * Redistributions of source code must retain the above copyright
 //       notice, this list of conditions and the following disclaimer.
 //     * Redistributions in binary form must reproduce the above
 //       copyright notice, this list of conditions and the following
 //       disclaimer in the documentation and/or other materials provided
@@ skipping 3878 matching lines @@
          ToRegister(instr->right()).is(r2));
   ASSERT(ToDoubleRegister(instr->left()).is(d1));
   ASSERT(ToDoubleRegister(instr->result()).is(d3));
 
   if (exponent_type.IsSmi()) {
     MathPowStub stub(MathPowStub::TAGGED);
     __ CallStub(&stub);
   } else if (exponent_type.IsTagged()) {
     Label no_deopt;
     __ JumpIfSmi(r2, &no_deopt);
-    __ ldr(r7, FieldMemOperand(r2, HeapObject::kMapOffset));
+    __ ldr(r6, FieldMemOperand(r2, HeapObject::kMapOffset));
     __ LoadRoot(ip, Heap::kHeapNumberMapRootIndex);
-    __ cmp(r7, Operand(ip));
+    __ cmp(r6, Operand(ip));
     DeoptimizeIf(ne, instr->environment());
     __ bind(&no_deopt);
     MathPowStub stub(MathPowStub::TAGGED);
     __ CallStub(&stub);
   } else if (exponent_type.IsInteger32()) {
     MathPowStub stub(MathPowStub::INTEGER);
     __ CallStub(&stub);
   } else {
     ASSERT(exponent_type.IsDouble());
     MathPowStub stub(MathPowStub::DOUBLE);
@@ skipping 1520 matching lines @@
 void LCodeGen::DoToFastProperties(LToFastProperties* instr) {
   ASSERT(ToRegister(instr->value()).is(r0));
   __ push(r0);
   CallRuntime(Runtime::kToFastProperties, 1, instr);
 }
 
 
 void LCodeGen::DoRegExpLiteral(LRegExpLiteral* instr) {
   Label materialized;
   // Registers will be used as follows:
-  // r7 = literals array.
+  // r6 = literals array.
   // r1 = regexp literal.
   // r0 = regexp literal clone.
-  // r2 and r4-r6 are used as temporaries.
+  // r2-5 are used as temporaries.
   int literal_offset =
       FixedArray::OffsetOfElementAt(instr->hydrogen()->literal_index());
-  __ LoadHeapObject(r7, instr->hydrogen()->literals());
-  __ ldr(r1, FieldMemOperand(r7, literal_offset));
+  __ LoadHeapObject(r6, instr->hydrogen()->literals());
+  __ ldr(r1, FieldMemOperand(r6, literal_offset));
   __ LoadRoot(ip, Heap::kUndefinedValueRootIndex);
   __ cmp(r1, ip);
   __ b(ne, &materialized);
 
   // Create regexp literal using runtime function
   // Result will be in r0.
-  __ mov(r6, Operand(Smi::FromInt(instr->hydrogen()->literal_index())));
-  __ mov(r5, Operand(instr->hydrogen()->pattern()));
-  __ mov(r4, Operand(instr->hydrogen()->flags()));
-  __ Push(r7, r6, r5, r4);
+  __ mov(r5, Operand(Smi::FromInt(instr->hydrogen()->literal_index())));
+  __ mov(r4, Operand(instr->hydrogen()->pattern()));
+  __ mov(r3, Operand(instr->hydrogen()->flags()));
+  __ Push(r6, r5, r4, r3);
   CallRuntime(Runtime::kMaterializeRegExpLiteral, 4, instr);
   __ mov(r1, r0);
 
   __ bind(&materialized);
   int size = JSRegExp::kSize + JSRegExp::kInObjectFieldCount * kPointerSize;
   Label allocated, runtime_allocate;
 
   __ Allocate(size, r0, r2, r3, &runtime_allocate, TAG_OBJECT);
   __ jmp(&allocated);
 
@@ skipping 368 matching lines @@
   __ sub(scratch, result, Operand::PointerOffsetFromSmiKey(index));
   __ ldr(result, FieldMemOperand(scratch,
                                  FixedArray::kHeaderSize - kPointerSize));
   __ bind(&done);
 }
 
 
 #undef __
 
 } }  // namespace v8::internal