[clang][bytecode] Fix allocating primitive arrays of unknown bound

[tbaederr]

No description provided.

[llvmbot]

@llvm/pr-subscribers-clang

Author: Timm Baeder (tbaederr)

Changes

---

Full diff: https://github.com/llvm/llvm-project/pull/127788.diff

2 Files Affected:

• (modified) clang/lib/AST/ByteCode/Compiler.cpp (+2-1)
• (modified) clang/test/AST/ByteCode/new-delete.cpp (+6)

diff --git a/clang/lib/AST/ByteCode/Compiler.cpp b/clang/lib/AST/ByteCode/Compiler.cpp
index 503c58a67adeb..a35aa9471a73d 100644
--- a/clang/lib/AST/ByteCode/Compiler.cpp
+++ b/clang/lib/AST/ByteCode/Compiler.cpp
@@ -3397,7 +3397,8 @@ bool Compiler<Emitter>::VisitCXXNewExpr(const CXXNewExpr *E) {
           CtorFunc = getFunction(CE->getConstructor());
           if (!CtorFunc)
             return false;
-        }
+        } else if (!DynamicInit)
+          DynamicInit = Init;
 
         LabelTy EndLabel = this->getLabel();
         LabelTy StartLabel = this->getLabel();
diff --git a/clang/test/AST/ByteCode/new-delete.cpp b/clang/test/AST/ByteCode/new-delete.cpp
index 7e5f6ab8815ea..5be1bb944c18c 100644
--- a/clang/test/AST/ByteCode/new-delete.cpp
+++ b/clang/test/AST/ByteCode/new-delete.cpp
@@ -907,6 +907,12 @@ namespace IncompleteArray {
     return c;
   }
   static_assert(test4() == 12);
+
+
+  constexpr char *f(int n) {
+    return new char[n]();
+  }
+  static_assert((delete[] f(2), true));
 }
 
 namespace NonConstexprArrayCtor {