[clang] [clang][bytecode] Add InitLinkScope for temporary variables (PR #106552)

[Timm Baeder via cfe-commits]

https://github.com/tbaederr created 
https://github.com/llvm/llvm-project/pull/106552

None

>From 5d313ed583f9ca8209fbdc04ecb0fd8174e74239 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Timm=20B=C3=A4der?= <tbae...@redhat.com>
Date: Thu, 29 Aug 2024 13:46:18 +0200
Subject: [PATCH] [clang][bytecode] Add InitLinkScope for temporary variables

---
 clang/lib/AST/ByteCode/Compiler.cpp | 4 +---
 clang/test/AST/ByteCode/records.cpp | 6 ++++++
 2 files changed, 7 insertions(+), 3 deletions(-)

diff --git a/clang/lib/AST/ByteCode/Compiler.cpp 
b/clang/lib/AST/ByteCode/Compiler.cpp
index 0fc942a4f1bc4f..46545a5b3267e6 100644
--- a/clang/lib/AST/ByteCode/Compiler.cpp
+++ b/clang/lib/AST/ByteCode/Compiler.cpp
@@ -3287,6 +3287,7 @@ template <class Emitter> bool 
Compiler<Emitter>::visit(const Expr *E) {
 
     if (!this->emitGetPtrLocal(*LocalIndex, E))
       return false;
+    InitLinkScope<Emitter> ILS(this, InitLink::Temp(*LocalIndex));
     return this->visitInitializer(E);
   }
 
@@ -4254,9 +4255,6 @@ bool Compiler<Emitter>::VisitCXXThisExpr(const 
CXXThisExpr *E) {
   // instance pointer of the current function frame, but e.g. to the 
declaration
   // currently being initialized. Here we emit the necessary instruction(s) for
   // this scenario.
-  if (!InitStackActive || !E->isImplicit())
-    return this->emitThis(E);
-
   if (InitStackActive && !InitStack.empty()) {
     unsigned StartIndex = 0;
     for (StartIndex = InitStack.size() - 1; StartIndex > 0; --StartIndex) {
diff --git a/clang/test/AST/ByteCode/records.cpp 
b/clang/test/AST/ByteCode/records.cpp
index 7e3cf5b94518f7..2799afa9577b78 100644
--- a/clang/test/AST/ByteCode/records.cpp
+++ b/clang/test/AST/ByteCode/records.cpp
@@ -1653,3 +1653,9 @@ namespace ExprWithCleanups {
   constexpr auto F = true ? 1i : 2i;
   static_assert(F == 1i, "");
 }
+
+namespace ExplicitThisInTemporary {
+  struct B { B *p = this; };
+  constexpr bool g(B b) { return &b == b.p; }
+  static_assert(g({}), "");
+}

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