[clang] 5d08625 - [clang][bytecode] Activate pointers in Init{, Pop} (#112832)
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cfe-commits at lists.llvm.org
Thu Oct 17 22:38:25 PDT 2024
Author: Timm Baeder
Date: 2024-10-18T07:38:22+02:00
New Revision: 5d08625347a5467d463ff4377816709e262edb59
URL: https://github.com/llvm/llvm-project/commit/5d08625347a5467d463ff4377816709e262edb59
DIFF: https://github.com/llvm/llvm-project/commit/5d08625347a5467d463ff4377816709e262edb59.diff
LOG: [clang][bytecode] Activate pointers in Init{,Pop} (#112832)
Added:
Modified:
clang/lib/AST/ByteCode/Interp.h
clang/test/AST/ByteCode/placement-new.cpp
Removed:
################################################################################
diff --git a/clang/lib/AST/ByteCode/Interp.h b/clang/lib/AST/ByteCode/Interp.h
index a1a92562cc5e3d..f034bde309035f 100644
--- a/clang/lib/AST/ByteCode/Interp.h
+++ b/clang/lib/AST/ByteCode/Interp.h
@@ -1841,6 +1841,7 @@ bool Init(InterpState &S, CodePtr OpPC) {
assert(false);
return false;
}
+ Ptr.activate();
Ptr.initialize();
new (&Ptr.deref<T>()) T(Value);
return true;
@@ -1852,6 +1853,7 @@ bool InitPop(InterpState &S, CodePtr OpPC) {
const Pointer &Ptr = S.Stk.pop<Pointer>();
if (!CheckInit(S, OpPC, Ptr))
return false;
+ Ptr.activate();
Ptr.initialize();
new (&Ptr.deref<T>()) T(Value);
return true;
diff --git a/clang/test/AST/ByteCode/placement-new.cpp b/clang/test/AST/ByteCode/placement-new.cpp
index 6bd83f2372eab6..8e6d802e93295c 100644
--- a/clang/test/AST/ByteCode/placement-new.cpp
+++ b/clang/test/AST/ByteCode/placement-new.cpp
@@ -300,3 +300,14 @@ namespace UsedToCrash {
}
int alloc1 = (alloc(), 0);
}
+
+constexpr bool change_union_member() {
+ union U {
+ int a;
+ int b;
+ };
+ U u = {.a = 1};
+ std::construct_at<int>(&u.b, 2);
+ return u.b == 2;
+}
+static_assert(change_union_member());
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