Quick backend: rename target-specific #defines

Another step towards a single compiler.  The #include build mechanism
relies on macros with the same name to take on different values for
our various targets.  This CL prepends a target-specific string
(and exposes some needed by common code as functions rather than #defines).

Macros and #defines still available for use from target-dependent code,
but functions added for target independent use.  For example,
rRET0 for Arm becomes rARM_RET0 in target-dependent code, and
targetRegister(kRet0) in target-independent code.

No logic changes, other than adding functions to return previously #defined
values.  As of this CL, the primary target includes, xxxLIR.h, have no
macro collisions.

Change-Id: I5e11df844815b7d129b525a209dd7c46bd9a4a09
diff --git a/src/compiler/codegen/LocalOptimizations.cc b/src/compiler/codegen/LocalOptimizations.cc
index d2275aa..2688d65 100644
--- a/src/compiler/codegen/LocalOptimizations.cc
+++ b/src/compiler/codegen/LocalOptimizations.cc
@@ -151,7 +151,7 @@
           DCHECK(!(EncodingMap[checkLIR->opcode].flags & IS_STORE));
           /* Same value && same register type */
           if (checkLIR->aliasInfo == thisLIR->aliasInfo &&
-            REGTYPE(checkLIR->operands[0]) == REGTYPE(nativeRegId)) {
+              sameRegType(checkLIR->operands[0], nativeRegId)) {
             /*
              * Different destination register - insert
              * a move
@@ -166,8 +166,7 @@
           /* Must alias */
           if (checkLIR->aliasInfo == thisLIR->aliasInfo) {
             /* Only optimize compatible registers */
-            bool regCompatible =
-                REGTYPE(checkLIR->operands[0]) == REGTYPE(nativeRegId);
+            bool regCompatible = sameRegType(checkLIR->operands[0], nativeRegId);
             if ((isThisLIRLoad && isCheckLIRLoad) ||
                 (!isThisLIRLoad && isCheckLIRLoad)) {
               /* RAR or RAW */