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

src/arm/deoptimizer-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 250 matching lines @@
   __ add(r1, r4, Operand(r1, LSL, 2));
   __ jmp(&outer_loop_header);
   __ bind(&outer_push_loop);
   // Inner loop state: r2 = current FrameDescription*, r3 = loop index.
   __ ldr(r2, MemOperand(r4, 0));  // output_[ix]
   __ ldr(r3, MemOperand(r2, FrameDescription::frame_size_offset()));
   __ jmp(&inner_loop_header);
   __ bind(&inner_push_loop);
   __ sub(r3, r3, Operand(sizeof(uint32_t)));
   __ add(r6, r2, Operand(r3));
-  __ ldr(r7, MemOperand(r6, FrameDescription::frame_content_offset()));
-  __ push(r7);
+  __ ldr(r6, MemOperand(r6, FrameDescription::frame_content_offset()));
+  __ push(r6);
   __ bind(&inner_loop_header);
   __ cmp(r3, Operand::Zero());
   __ b(ne, &inner_push_loop);  // test for gt?
   __ add(r4, r4, Operand(kPointerSize));
   __ bind(&outer_loop_header);
   __ cmp(r4, r1);
   __ b(lt, &outer_push_loop);
 
   // Check CPU flags for number of registers, setting the Z condition flag.
   __ CheckFor32DRegs(ip);
@@ skipping 25 matching lines @@
   }
 
   // Restore the registers from the stack.
   __ ldm(ia_w, sp, restored_regs);  // all but pc registers.
   __ pop(ip);  // remove sp
   __ pop(ip);  // remove lr
 
   __ InitializeRootRegister();
 
   __ pop(ip);  // remove pc
-  __ pop(r7);  // get continuation, leave pc on stack
+  __ pop(ip);  // get continuation, leave pc on stack
   __ pop(lr);
-  __ Jump(r7);
+  __ Jump(ip);
   __ stop("Unreachable.");
 }
 
 
 void Deoptimizer::TableEntryGenerator::GeneratePrologue() {
   // Create a sequence of deoptimization entries.
   // Note that registers are still live when jumping to an entry.
   Label done;
   for (int i = 0; i < count(); i++) {
     int start = masm()->pc_offset();
@@ skipping 13 matching lines @@
 
 
 void FrameDescription::SetCallerFp(unsigned offset, intptr_t value) {
   SetFrameSlot(offset, value);
 }
 
 
 #undef __
 
 } }  // namespace v8::internal