Revert "Rework Quick compiler's register handling"

This reverts commit 2c1ed456dcdb027d097825dd98dbe48c71599b6c.

Change-Id: If88d69ba88e0af0b407ff2240566d7e4545d8a99
diff --git a/compiler/dex/quick/x86/utility_x86.cc b/compiler/dex/quick/x86/utility_x86.cc
index d5d6b0e..48a39bb 100644
--- a/compiler/dex/quick/x86/utility_x86.cc
+++ b/compiler/dex/quick/x86/utility_x86.cc
@@ -514,7 +514,7 @@
         // We don't know the proper offset for the value, so pick one that will force
         // 4 byte offset.  We will fix this up in the assembler later to have the right
         // value.
-        res = LoadBaseDisp(rl_method.reg.GetReg(), 256 /* bogus */, r_dest_lo, kDouble, INVALID_SREG);
+        res = LoadBaseDisp(rl_method.low_reg, 256 /* bogus */, r_dest_lo, kDouble, INVALID_SREG);
         res->target = data_target;
         res->flags.fixup = kFixupLoad;
         SetMemRefType(res, true, kLiteral);
@@ -714,7 +714,7 @@
       opcode = is_array ? kX86Mov8AR : kX86Mov8MR;
       break;
     default:
-      LOG(FATAL) << "Bad case in StoreBaseIndexedDispBody";
+      LOG(FATAL) << "Bad case in LoadBaseIndexedDispBody";
   }
 
   if (!is_array) {