Variable is unused when opt mode is on and assert is turned off

[google-yfyang]

No description provided.

[llvmbot]

@llvm/pr-subscribers-clang

Author: None (google-yfyang)

Changes

---

Full diff: https://github.com/llvm/llvm-project/pull/142049.diff

1 Files Affected:

• (modified) clang/lib/AST/ByteCode/InterpBuiltin.cpp (+2-1)

diff --git a/clang/lib/AST/ByteCode/InterpBuiltin.cpp b/clang/lib/AST/ByteCode/InterpBuiltin.cpp
index e84d8fba7ae32..3b47d868cfbc6 100644
--- a/clang/lib/AST/ByteCode/InterpBuiltin.cpp
+++ b/clang/lib/AST/ByteCode/InterpBuiltin.cpp
@@ -764,7 +764,8 @@ static bool interp__builtin_addressof(InterpState &S, CodePtr OpPC,
                                       const InterpFrame *Frame,
                                       const CallExpr *Call) {
   assert(Call->getArg(0)->isLValue());
-  PrimType PtrT = S.getContext().classify(Call->getArg(0)).value_or(PT_Ptr);
+  [[maybe_unused]] PrimType PtrT =
+      S.getContext().classify(Call->getArg(0)).value_or(PT_Ptr);
   assert(PtrT == PT_Ptr &&
          "Unsupported pointer type passed to __builtin_addressof()");
   return true;

[shafik]

Typically we use #ifndef NDEBUG to avoid doing unnecessary computations example here:

llvm-project/clang/include/clang/AST/Type.h

Lines 8993 to 8997 in 4d650ef

	#ifndef NDEBUG
	QualType Adjusted = getAdjustedType();
	(void)AttributedType::stripOuterNullability(Adjusted);
	assert(isa<PointerType>(Adjusted));
	#endif

but you can find this all over.