https://github.com/bonktree updated
https://github.com/llvm/llvm-project/pull/68435
>From 021a0664905385b0bfb212316810bd15032d1df2 Mon Sep 17 00:00:00 2001
From: Arseny Maslennikov <ars...@altlinux.org>
Date: Thu, 5 Oct 2023 10:05:14 +0300
Subject: [PATCH] [AST] Use explicit type erasure in TypeSourceInfo constructor
When this file is included in a project compiled with GCC 13 -Werror,
compilation fails with the following diagnostic:
/usr/lib/llvm-17.0/include/clang/AST/TypeLoc.h: In constructor
'clang::TypeSourceInfo::TypeSourceInfo(clang::QualType, size_t)':
/usr/lib/llvm-17.0/include/clang/AST/TypeLoc.h:245:9: error: 'void*
memset(void*, int, size_t)' clearing an object of non-trivial type 'class
clang::TypeSourceInfo'; use assignment instead
+[-Werror=class-memaccess]
245 | memset(this + 1, 0, DataSize);
| ~~~~~~^~~~~~~~~~~~~~~~~~~~~~~
To avoid this, we add an explicit type cast. The cast to void makes
sense, since other member functions of TypeSourceInfo also treat the
buffer `(this + 1)` of length `DataSize` as opaque memory, and was
likely left out by mistake.
Fixes: 4498663f3de0 ("[AST] Initialized data after TypeSourceInfo")
---
clang/include/clang/AST/TypeLoc.h | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/clang/include/clang/AST/TypeLoc.h
b/clang/include/clang/AST/TypeLoc.h
index 98427a8dcbfe660..5bb487f1a7f4455 100644
--- a/clang/include/clang/AST/TypeLoc.h
+++ b/clang/include/clang/AST/TypeLoc.h
@@ -243,7 +243,7 @@ class TypeLoc {
inline TypeSourceInfo::TypeSourceInfo(QualType ty, size_t DataSize) : Ty(ty) {
// Init data attached to the object. See getTypeLoc.
- memset(this + 1, 0, DataSize);
+ memset(static_cast<void *>(this + 1), 0, DataSize);
}
/// Return the TypeLoc for a type source info.
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