Quick compiler: Single .so for all targets

With this CL, all targets can be built into a single .so (but
we're not yet doing so - the compiler driver needs to be reworked).

A new Codgen class is introduced (see compiler/codegen/codegen.h),
along with target-specific sub-classes ArmCodegen, MipsCodegens and
X86Codegen (see compiler/codegen/*/codegen_[Arm|Mips|X86].h).

Additional minor code, comment and format refactoring.  Some source
files combined, temporary header files deleted and a few file
renames to better identify their function.

Next up is combining the Quick and Portable .so files.

Note: building all targets into libdvm-compiler.so increases its
size by 140K bytes.  I'm inclined to not bother introducing conditional
compilation to limit code to the specific target - the added build and
testing complexity doesn't doesn't seem worth such a modest size savings.

Change-Id: Id9c5b4502ad6b77cdb31f71d3126f51a4f2e9dfe
diff --git a/src/compiler/dataflow.h b/src/compiler/dataflow.h
index 00e6487..28b9a32 100644
--- a/src/compiler/dataflow.h
+++ b/src/compiler/dataflow.h
@@ -33,17 +33,17 @@
   kSetsConst,
   kFormat35c,
   kFormat3rc,
-  kNullCheckSrc0,        // Null check of uses[0]
-  kNullCheckSrc1,        // Null check of uses[1]
-  kNullCheckSrc2,        // Null check of uses[2]
-  kNullCheckOut0,        // Null check out outgoing arg0
-  kDstNonNull,           // May assume dst is non-null
-  kRetNonNull,           // May assume retval is non-null
-  kNullTransferSrc0,     // Object copy src[0] -> dst
-  kNullTransferSrcN,     // Phi null check state transfer
-  kRangeCheckSrc1,       // Range check of uses[1]
-  kRangeCheckSrc2,       // Range check of uses[2]
-  kRangeCheckSrc3,       // Range check of uses[3]
+  kNullCheckSrc0,        // Null check of uses[0].
+  kNullCheckSrc1,        // Null check of uses[1].
+  kNullCheckSrc2,        // Null check of uses[2].
+  kNullCheckOut0,        // Null check out outgoing arg0.
+  kDstNonNull,           // May assume dst is non-null.
+  kRetNonNull,           // May assume retval is non-null.
+  kNullTransferSrc0,     // Object copy src[0] -> dst.
+  kNullTransferSrcN,     // Phi null check state transfer.
+  kRangeCheckSrc1,       // Range check of uses[1].
+  kRangeCheckSrc2,       // Range check of uses[2].
+  kRangeCheckSrc3,       // Range check of uses[3].
   kFPA,
   kFPB,
   kFPC,
@@ -53,7 +53,7 @@
   kRefA,
   kRefB,
   kRefC,
-  kUsesMethodStar,       // Implicit use of Method*
+  kUsesMethodStar,       // Implicit use of Method*.
 };
 
 #define DF_NOP                  0
@@ -147,8 +147,8 @@
 struct ArrayAccessInfo {
   int array_reg;
   int iv_reg;
-  int max_c;                   // For DIV - will affect upper bound checking
-  int min_c;                   // For DIV - will affect lower bound checking
+  int max_c;                   // For DIV - will affect upper bound checking.
+  int min_c;                   // For DIV - will affect lower bound checking.
 };
 
 struct LoopInfo {
@@ -166,7 +166,8 @@
 bool DoConstantPropogation(CompilationUnit* cu, BasicBlock* bb);
 void CompilerInitializeSSAConversion(CompilationUnit* cu);
 bool ClearVisitedFlag(struct CompilationUnit* cu, struct BasicBlock* bb);
-void DataFlowAnalysisDispatcher(CompilationUnit* cu, bool (*func)(CompilationUnit*, BasicBlock*), DataFlowAnalysisMode dfa_mode, bool is_iterative);
+void DataFlowAnalysisDispatcher(CompilationUnit* cu, bool (*func)(CompilationUnit*, BasicBlock*),
+                                DataFlowAnalysisMode dfa_mode, bool is_iterative);
 MIR* FindMoveResult(CompilationUnit* cu, BasicBlock* bb, MIR* mir);
 void NullCheckElimination(CompilationUnit *cu);
 void BasicBlockCombine(CompilationUnit* cu);