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

1 files changed, 1 insertions, 0 deletions

diff --git a/compiler/utils/stack_checks.h b/compiler/utils/stack_checks.h
index ce01077808..e762f7d266 100644
--- a/compiler/utils/stack_checks.h
+++ b/compiler/utils/stack_checks.h
@@ -35,6 +35,7 @@ static constexpr size_t kSmallFrameSize = 1 * KB;
 //
 // A frame is considered large when it's above kLargeFrameSize.
 static inline bool FrameNeedsStackCheck(size_t size, InstructionSet isa) {
+  UNUSED(isa);
   return size >= kLargeFrameSize;
 }