[clang] [clang][constexpr] Evaluate parenthesized array new with the allocated bound (PR #228675)

[Macro Terra via cfe-commits]

hongtaihu wrote:

> You need to fix the bytecode interpreter too:
> 
> ```diff
> diff --git i/clang/lib/AST/ByteCode/Compiler.cpp w/clang/lib/AST/ByteCode/Compiler.cpp
> index 313687f53816..58e68de845c9 100644
> --- i/clang/lib/AST/ByteCode/Compiler.cpp
> +++ w/clang/lib/AST/ByteCode/Compiler.cpp
> @@ -4384,6 +4384,10 @@ bool Compiler<Emitter>::VisitCXXNewExpr(const CXXNewExpr *E) {
>              DynamicInit = ILE->getArrayFiller();
>            else if (StaticInitElems > 0 && isa<StringLiteral>(ILE->getInit(0)))
>              ElemT = classifyPrim(CAT->getElementType());
> +        } else if (const auto *PLI = dyn_cast<CXXParenListInitExpr>(Init)) {
> +          DynamicInit = PLI->getArrayFiller();
> +          if (StaticInitElems > 0 && isa<StringLiteral>(PLI->getInitExprs()[0]))
> +            ElemT = classifyPrim(CAT->getElementType());
>          }
>        }
> ```

done

https://github.com/llvm/llvm-project/pull/228675