Remove -Wno-unused-parameter and -Wno-sign-promo from base cflags.

Fix associated errors about unused paramenters and implict sign conversions.
For sign conversion this was largely in the area of enums, so add ostream
operators for the effected enums and fix tools/generate-operator-out.py.
Tidy arena allocation code and arena allocated data types, rather than fixing
new and delete operators.
Remove dead code.

Change-Id: I5b433e722d2f75baacfacae4d32aef4a828bfe1b
diff --git a/compiler/utils/assembler.cc b/compiler/utils/assembler.cc
index 8a1289d..6834512 100644
--- a/compiler/utils/assembler.cc
+++ b/compiler/utils/assembler.cc
@@ -125,77 +125,91 @@
   }
 }
 
-void Assembler::StoreImmediateToThread32(ThreadOffset<4> dest, uint32_t imm,
-                                         ManagedRegister scratch) {
+void Assembler::StoreImmediateToThread32(ThreadOffset<4> dest ATTRIBUTE_UNUSED,
+                                         uint32_t imm ATTRIBUTE_UNUSED,
+                                         ManagedRegister scratch ATTRIBUTE_UNUSED) {
   UNIMPLEMENTED(FATAL);
 }
 
-void Assembler::StoreImmediateToThread64(ThreadOffset<8> dest, uint32_t imm,
-                                         ManagedRegister scratch) {
+void Assembler::StoreImmediateToThread64(ThreadOffset<8> dest ATTRIBUTE_UNUSED,
+                                         uint32_t imm ATTRIBUTE_UNUSED,
+                                         ManagedRegister scratch ATTRIBUTE_UNUSED) {
   UNIMPLEMENTED(FATAL);
 }
 
-void Assembler::StoreStackOffsetToThread32(ThreadOffset<4> thr_offs,
-                                           FrameOffset fr_offs,
-                                           ManagedRegister scratch) {
+void Assembler::StoreStackOffsetToThread32(ThreadOffset<4> thr_offs ATTRIBUTE_UNUSED,
+                                           FrameOffset fr_offs ATTRIBUTE_UNUSED,
+                                           ManagedRegister scratch ATTRIBUTE_UNUSED) {
   UNIMPLEMENTED(FATAL);
 }
 
-void Assembler::StoreStackOffsetToThread64(ThreadOffset<8> thr_offs,
-                                           FrameOffset fr_offs,
-                                           ManagedRegister scratch) {
+void Assembler::StoreStackOffsetToThread64(ThreadOffset<8> thr_offs ATTRIBUTE_UNUSED,
+                                           FrameOffset fr_offs ATTRIBUTE_UNUSED,
+                                           ManagedRegister scratch ATTRIBUTE_UNUSED) {
   UNIMPLEMENTED(FATAL);
 }
 
-void Assembler::StoreStackPointerToThread32(ThreadOffset<4> thr_offs) {
+void Assembler::StoreStackPointerToThread32(ThreadOffset<4> thr_offs ATTRIBUTE_UNUSED) {
   UNIMPLEMENTED(FATAL);
 }
 
-void Assembler::StoreStackPointerToThread64(ThreadOffset<8> thr_offs) {
+void Assembler::StoreStackPointerToThread64(ThreadOffset<8> thr_offs ATTRIBUTE_UNUSED) {
   UNIMPLEMENTED(FATAL);
 }
 
-void Assembler::LoadFromThread32(ManagedRegister dest, ThreadOffset<4> src, size_t size) {
+void Assembler::LoadFromThread32(ManagedRegister dest ATTRIBUTE_UNUSED,
+                                 ThreadOffset<4> src ATTRIBUTE_UNUSED,
+                                 size_t size ATTRIBUTE_UNUSED) {
   UNIMPLEMENTED(FATAL);
 }
 
-void Assembler::LoadFromThread64(ManagedRegister dest, ThreadOffset<8> src, size_t size) {
+void Assembler::LoadFromThread64(ManagedRegister dest ATTRIBUTE_UNUSED,
+                                 ThreadOffset<8> src ATTRIBUTE_UNUSED,
+                                 size_t size ATTRIBUTE_UNUSED) {
   UNIMPLEMENTED(FATAL);
 }
 
-void Assembler::LoadRawPtrFromThread32(ManagedRegister dest, ThreadOffset<4> offs) {
+void Assembler::LoadRawPtrFromThread32(ManagedRegister dest ATTRIBUTE_UNUSED,
+                                       ThreadOffset<4> offs ATTRIBUTE_UNUSED) {
   UNIMPLEMENTED(FATAL);
 }
 
-void Assembler::LoadRawPtrFromThread64(ManagedRegister dest, ThreadOffset<8> offs) {
+void Assembler::LoadRawPtrFromThread64(ManagedRegister dest ATTRIBUTE_UNUSED,
+                                       ThreadOffset<8> offs ATTRIBUTE_UNUSED) {
   UNIMPLEMENTED(FATAL);
 }
 
-void Assembler::CopyRawPtrFromThread32(FrameOffset fr_offs, ThreadOffset<4> thr_offs,
-                                       ManagedRegister scratch) {
+void Assembler::CopyRawPtrFromThread32(FrameOffset fr_offs ATTRIBUTE_UNUSED,
+                                       ThreadOffset<4> thr_offs ATTRIBUTE_UNUSED,
+                                       ManagedRegister scratch ATTRIBUTE_UNUSED) {
   UNIMPLEMENTED(FATAL);
 }
 
-void Assembler::CopyRawPtrFromThread64(FrameOffset fr_offs, ThreadOffset<8> thr_offs,
-                                       ManagedRegister scratch) {
+void Assembler::CopyRawPtrFromThread64(FrameOffset fr_offs ATTRIBUTE_UNUSED,
+                                       ThreadOffset<8> thr_offs ATTRIBUTE_UNUSED,
+                                       ManagedRegister scratch ATTRIBUTE_UNUSED) {
   UNIMPLEMENTED(FATAL);
 }
 
-void Assembler::CopyRawPtrToThread32(ThreadOffset<4> thr_offs, FrameOffset fr_offs,
-                                     ManagedRegister scratch) {
+void Assembler::CopyRawPtrToThread32(ThreadOffset<4> thr_offs ATTRIBUTE_UNUSED,
+                                     FrameOffset fr_offs ATTRIBUTE_UNUSED,
+                                     ManagedRegister scratch ATTRIBUTE_UNUSED) {
   UNIMPLEMENTED(FATAL);
 }
 
-void Assembler::CopyRawPtrToThread64(ThreadOffset<8> thr_offs, FrameOffset fr_offs,
-                                     ManagedRegister scratch) {
+void Assembler::CopyRawPtrToThread64(ThreadOffset<8> thr_offs ATTRIBUTE_UNUSED,
+                                     FrameOffset fr_offs ATTRIBUTE_UNUSED,
+                                     ManagedRegister scratch ATTRIBUTE_UNUSED) {
   UNIMPLEMENTED(FATAL);
 }
 
-void Assembler::CallFromThread32(ThreadOffset<4> offset, ManagedRegister scratch) {
+void Assembler::CallFromThread32(ThreadOffset<4> offset ATTRIBUTE_UNUSED,
+                                 ManagedRegister scratch ATTRIBUTE_UNUSED) {
   UNIMPLEMENTED(FATAL);
 }
 
-void Assembler::CallFromThread64(ThreadOffset<8> offset, ManagedRegister scratch) {
+void Assembler::CallFromThread64(ThreadOffset<8> offset ATTRIBUTE_UNUSED,
+                                 ManagedRegister scratch ATTRIBUTE_UNUSED) {
   UNIMPLEMENTED(FATAL);
 }