[clang] [clang][bytecode] Fix CK_ToVoid casts for Complex values (PR #175709)

[Timm Baeder via cfe-commits]

https://github.com/tbaederr created https://github.com/llvm/llvm-project/pull/175709

We need to remove the pointer to the local variable we've created specifically for this complex binary operator.

Fixes https://github.com/llvm/llvm-project/issues/175670

>From f8d4ca6f8e5da04408157293986b021a773cde15 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Timm=20B=C3=A4der?= <tbaeder at redhat.com>
Date: Tue, 13 Jan 2026 06:49:32 +0100
Subject: [PATCH] [clang][bytecode] Fix CK_ToVoid casts for Complex values

We need to remove the pointer to the local variable we've created
specifically for this complex binary operator.

Fixes https://github.com/llvm/llvm-project/issues/175670
---
 clang/lib/AST/ByteCode/Compiler.cpp | 4 ++++
 clang/test/AST/ByteCode/complex.cpp | 4 ++++
 2 files changed, 8 insertions(+)

diff --git a/clang/lib/AST/ByteCode/Compiler.cpp b/clang/lib/AST/ByteCode/Compiler.cpp
index b68576158decc..a67648aa2aff9 100644
--- a/clang/lib/AST/ByteCode/Compiler.cpp
+++ b/clang/lib/AST/ByteCode/Compiler.cpp
@@ -1381,6 +1381,10 @@ bool Compiler<Emitter>::VisitComplexBinOp(const BinaryOperator *E) {
     } else {
       if (!this->emitPop(ResultElemT, E))
         return false;
+      // Remove the Complex temporary pointer we created ourselves at the
+      // beginning of this function.
+      if (!Initializing)
+        return this->emitPopPtr(E);
     }
   }
   return true;
diff --git a/clang/test/AST/ByteCode/complex.cpp b/clang/test/AST/ByteCode/complex.cpp
index 182162d251ece..41e5dc0605c23 100644
--- a/clang/test/AST/ByteCode/complex.cpp
+++ b/clang/test/AST/ByteCode/complex.cpp
@@ -434,5 +434,9 @@ namespace Discard {
   }
   static_assert(test3() == 10, ""); // both-error {{not an integral constant expression}}
 
+  constexpr void V() {
+    (void)(1 + 2i);
+  }
+  static_assert((V(), true));
 
 }