[clang][CodeGen] Return RValue from `EmitVAArg` (#94635)

This should simplify handling of resulting value by the callers.

1 files changed, 14 insertions, 1 deletions

diff --git a/clang/lib/CodeGen/CodeGenFunction.h b/clang/lib/CodeGen/CodeGenFunction.h
index 06fc725..8525f66 100644
--- a/clang/lib/CodeGen/CodeGenFunction.h
+++ b/clang/lib/CodeGen/CodeGenFunction.h
@@ -3014,7 +3014,8 @@ public:
   /// \returns A pointer to the argument.
   // FIXME: We should be able to get rid of this method and use the va_arg
   // instruction in LLVM instead once it works well enough.
-  Address EmitVAArg(VAArgExpr *VE, Address &VAListAddr);
+  RValue EmitVAArg(VAArgExpr *VE, Address &VAListAddr,
+                   AggValueSlot Slot = AggValueSlot::ignored());
 
   /// emitArrayLength - Compute the length of an array, even if it's a
   /// VLA, and drill down to the base element type.
@@ -4215,6 +4216,11 @@ public:
   RValue EmitLoadOfBitfieldLValue(LValue LV, SourceLocation Loc);
   RValue EmitLoadOfGlobalRegLValue(LValue LV);
 
+  /// Like EmitLoadOfLValue but also handles complex and aggregate types.
+  RValue EmitLoadOfAnyValue(LValue V,
+                            AggValueSlot Slot = AggValueSlot::ignored(),
+                            SourceLocation Loc = {});
+
   /// EmitStoreThroughLValue - Store the specified rvalue into the specified
   /// lvalue, where both are guaranteed to the have the same type, and that type
   /// is 'Ty'.
@@ -4775,6 +4781,13 @@ public:
   /// aggregate type into a temporary LValue.
   LValue EmitAggExprToLValue(const Expr *E);
 
+  enum ExprValueKind { EVK_RValue, EVK_NonRValue };
+
+  /// EmitAggFinalDestCopy - Emit copy of the specified aggregate into
+  /// destination address.
+  void EmitAggFinalDestCopy(QualType Type, AggValueSlot Dest, const LValue &Src,
+                            ExprValueKind SrcKind);
+
   /// Build all the stores needed to initialize an aggregate at Dest with the
   /// value Val.
   void EmitAggregateStore(llvm::Value *Val, Address Dest, bool DestIsVolatile);