refactor(codegen): remove dead parameters, fields and branches

Drop the never-read StackObject::IsCopy flag and registerStackObject
parameter, the unused NewExprAST forward declaration, the unused Ret
parameter of FunctionGen::emitReturn and CG parameter of
ArrayHandler::loadElement, unused <cstdio> includes, and the
coerceValueToType early returns already covered by the exact LLVM type
check (builtin kinds always map to double/i64/i1/i8).

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

3 files changed, 3 insertions, 5 deletions

diff --git a/include/cps/ArrayHandler.h b/include/cps/ArrayHandler.h
index e678af4..8ba631f 100644
--- a/include/cps/ArrayHandler.h
+++ b/include/cps/ArrayHandler.h
@@ -53,7 +53,7 @@ class ArrayHandler {
                             bool RequireExact,
                             CodeGen &CG,
                             std::vector<llvm::Value*> &Out);
-    llvm::Value *loadElement(const std::string &Name, llvm::Value *Offset, CodeGen &CG);
+    llvm::Value *loadElement(const std::string &Name, llvm::Value *Offset);
     void emitPrintLoop(const std::string &Name,
                        int CurrentDim,
                        std::vector<llvm::Value*> CurrentIndices,
diff --git a/include/cps/CodeGen.h b/include/cps/CodeGen.h
index 6477406..73068bf 100644
--- a/include/cps/CodeGen.h
+++ b/include/cps/CodeGen.h
@@ -24,7 +24,6 @@ class FileHandler;
 class MemoryHandler;
 class ExceptionHandler;
 class CastExprAST;
-class NewExprAST;
 class TemplateDeclAST;
 class ClassTypeDeclAST;
 
@@ -97,12 +96,11 @@ class CodeGen {
         llvm::AllocaInst *Alive;
         llvm::AllocaInst *Count; // Non-null for an array; Addr then holds its buffer pointer.
         int Line;
-        bool IsCopy;
         bool Temporary = false;
     };
     std::vector<StackObject> StackObjects;
     size_t registerStackObject(llvm::Value *Addr, const std::string &TypeName, int Line,
-                               bool IsArray = false, bool IsCopy = false);
+                               bool IsArray = false);
     void activateStackObject(size_t Index, llvm::Value *Count = nullptr);
     void emitStackObjectCleanup(const StackObject &Object);
     void finishStackObjects(llvm::Function *F);
diff --git a/include/cps/FunctionGen.h b/include/cps/FunctionGen.h
index a176e84..7bf7eca 100644
--- a/include/cps/FunctionGen.h
+++ b/include/cps/FunctionGen.h
@@ -120,7 +120,7 @@ public:
     llvm::Value *emitCall(const std::string &Callee, const std::vector<llvm::Value*> &Args);
     llvm::Value *emitCall(const FuncSig &Sig, const std::vector<llvm::Value*> &Args);
 
-    void emitReturn(ReturnStmtAST *Ret, llvm::Value *RetVal);
+    void emitReturn(llvm::Value *RetVal);
 };
 
 }