Fix double allocation of register on arm in DoDeferredMathAbsTaggedHeapNumber...

src/arm/lithium-codegen-arm.cc

 // Copyright 2011 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 2474 matching lines @@
   Register input = ToRegister(instr->input());
   Register scratch = scratch0();
 
   // Deoptimize if not a heap number.
   __ ldr(scratch, FieldMemOperand(input, HeapObject::kMapOffset));
   __ LoadRoot(ip, Heap::kHeapNumberMapRootIndex);
   __ cmp(scratch, Operand(ip));
   DeoptimizeIf(ne, instr->environment());
 
   Label done;
-  Register tmp = input.is(r0) ? r1 : r0;
-  Register tmp2 = r2;
-  Register tmp3 = r3;
 
   Label negative;
   __ ldr(scratch, FieldMemOperand(input, HeapNumber::kExponentOffset));
   // Check the sign of the argument. If the argument is positive, just
   // return it. We do not need to patch the stack since |input| and
   // |result| are the same register and |input| will be restored
   // unchanged by popping safepoint registers.
   __ tst(scratch, Operand(HeapNumber::kSignMask));
   __ b(ne, &negative);
   __ jmp(&done);
 
   __ bind(&negative);
   // Preserve the value of all registers.
   __ PushSafepointRegisters();
 
+  Register tmp = input.is(r0) ? r1 : r0;
+  Register tmp2 = input.is(r2) ? r3 : r2;
+  Register tmp3 = input.is(r4) ? r5 : r4;
+
   Label allocated, slow;
   __ LoadRoot(scratch, Heap::kHeapNumberMapRootIndex);
   __ AllocateHeapNumber(tmp, tmp2, tmp3, scratch, &slow);
   __ b(&allocated);
 
   // Slow case: Call the runtime system to do the number allocation.
   __ bind(&slow);
 
   __ CallRuntimeSaveDoubles(Runtime::kAllocateHeapNumber);
   RecordSafepointWithRegisters(
@@ skipping 1121 matching lines @@
 
 
 void LCodeGen::DoOsrEntry(LOsrEntry* instr) {
   Abort("DoOsrEntry unimplemented.");
 }
 
 
 #undef __
 
 } }  // namespace v8::internal