https://github.com/mahtohappy updated
https://github.com/llvm/llvm-project/pull/83124
>From 4661010da31d7fa83dd0e7282bcea8732b3598f0 Mon Sep 17 00:00:00 2001
From: mahtohappy <happy.ku...@windriver.com>
Date: Tue, 27 Feb 2024 03:13:51 -0800
Subject: [PATCH] [Clang][Sema] placement new initializes typedef array with
correct size
---
clang/lib/Sema/TreeTransform.h | 2 +-
.../X86/instantiate-new-placement-size.cpp | 19 +++++++++++++++++++
2 files changed, 20 insertions(+), 1 deletion(-)
create mode 100644 clang/test/CodeGen/X86/instantiate-new-placement-size.cpp
diff --git a/clang/lib/Sema/TreeTransform.h b/clang/lib/Sema/TreeTransform.h
index 7389a48fe56fcc..0a46deda194826 100644
--- a/clang/lib/Sema/TreeTransform.h
+++ b/clang/lib/Sema/TreeTransform.h
@@ -12731,7 +12731,7 @@ TreeTransform<Derived>::TransformCXXNewExpr(CXXNewExpr
*E) {
}
QualType AllocType = AllocTypeInfo->getType();
- if (!ArraySize) {
+ if (ArraySize) {
// If no array size was specified, but the new expression was
// instantiated with an array type (e.g., "new T" where T is
// instantiated with "int[4]"), extract the outer bound from the
diff --git a/clang/test/CodeGen/X86/instantiate-new-placement-size.cpp
b/clang/test/CodeGen/X86/instantiate-new-placement-size.cpp
new file mode 100644
index 00000000000000..8916376a61fa21
--- /dev/null
+++ b/clang/test/CodeGen/X86/instantiate-new-placement-size.cpp
@@ -0,0 +1,19 @@
+// RUN: %clang -S -Xclang -triple=x86_64-unknown-unknown
-fno-discard-value-names -emit-llvm -o - %s | FileCheck %s
+#include <new>
+
+// CHECK: call void @llvm.memset.p0.i64(ptr align 1 %x, i8 0, i64 8, i1 false)
+// CHECK: call void @llvm.memset.p0.i64(ptr align 16 %x, i8 0, i64 32, i1
false)
+template <typename TYPE>
+void f()
+{
+ typedef TYPE TArray[8];
+
+ TArray x;
+ new(&x) TArray();
+}
+
+int main()
+{
+ f<char>();
+ f<int>();
+}
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