Support for promoting Method* and compiler temps

This CL completes the support for allowing compiler-generated
data to be treated as a Dalvik register and become subject to
the normal register promotion and live temp tracking machinery.

Also:
   o Removes some vestigal and useless Method* loads from
     range argument setup.
   o Changes the Method* pseudo vReg number from -1 to -2 to
     avoid a conflict with the 0xffff marker in the register map.
   o Removes some experimental code for CSE at the basic block
     level.

Change-Id: I112a8bbe20f95a8d789f63908c84e5fa167c74ac
diff --git a/src/compiler/codegen/mips/ArchFactory.cc b/src/compiler/codegen/mips/ArchFactory.cc
index 9050cf9..b7f055d 100644
--- a/src/compiler/codegen/mips/ArchFactory.cc
+++ b/src/compiler/codegen/mips/ArchFactory.cc
@@ -185,7 +185,7 @@
         opRegImm(cUnit, kOpSub, rSP,
                  cUnit->frameSize - (spillCount * 4));
     }
-    storeBaseDisp(cUnit, rSP, 0, rARG0, kWord);
+
     flushIns(cUnit);
 
     if (cUnit->genDebugger) {