Return pointer for static members.

[jianlingzhong]

Code should be able handle regular static members and inline const static int member correctly:

Test cpp code

auto* I = Cpp::CreateInterpreter();
std::vector<Decl*> Decls, SubDecls;

std::string code = R"(
  struct MyStruct {
    static const int my_inline_static_var{10086}; 
    static int my_outline_static_var; 
  };

  MyStruct::my_outline_static_var = 1964;
)";

TestUtils::GetAllTopLevelDecls(code, Decls);

full code

#include "clang/Interpreter/CppInterOp.h"
#include "unittests/CppInterOp/Utils.h"
#include "clang/AST/Decl.h"
#include "llvm/IR/Module.h"
#include "llvm/Support/raw_ostream.h"
#include <iostream>

using namespace clang;

int main() {
  auto* I = Cpp::CreateInterpreter();
  std::vector<Decl*> Decls, SubDecls;
  
  std::string code = R"(
    struct MyStruct {
      static const int my_inline_static_var{10086}; 
      static int my_outline_static_var; 
    };

    MyStruct::my_outline_static_var = 1964;
  )";
  
  TestUtils::GetAllTopLevelDecls(code, Decls);
  if(Decls.size() > 0) {
      TestUtils::GetAllSubDecls(Decls[0], SubDecls);
      for(auto* decl : SubDecls) {
          if (decl && decl->getKind() == Decl::Var) {
              auto scope = (Cpp::TCppScope_t)decl;
              auto* VD = cast<VarDecl>(decl);
              std::string var_name = VD->getNameAsString();
              std::string wrapper_name = "wrapper_" + var_name;
              
              auto aot_call = Cpp::MakeAotCallable(scope, wrapper_name);
              if (aot_call.isValid()) {
                 std::cout << "\n========================================\n";
                 std::cout << "IR Dump for: " << var_name << "\n";
                 std::cout << "========================================\n";
                 llvm::Module* M = (llvm::Module*)aot_call.getModule();
                 M->print(llvm::outs(), nullptr);
              } else {
                 std::cout << "Failed to generate AOT wrapper for " << var_name << "\n";
              }
          }
      }
  }
}

output:

inline const static int

; Function Attrs: alwaysinline mustprogress nounwind ssp uwtable(sync)
define linkonce_odr void @wrapper_my_inline_static_var(ptr noundef %0, i32 noundef %1, ptr noundef %2, ptr noundef nonnull %3) #0 {
  %5 = alloca ptr, align 8
  %6 = alloca i32, align 4
  %7 = alloca ptr, align 8
  %8 = alloca ptr, align 8
  store ptr %0, ptr %5, align 8
  store i32 %1, ptr %6, align 4
  store ptr %2, ptr %7, align 8
  store ptr %3, ptr %8, align 8
  %9 = load ptr, ptr %8, align 8
  store i32 10086, ptr %9, align 4  ;; <= wrote 10086 directly and didn't take the address of the variable, 
  ret void
}

out of line const int

define linkonce_odr void @wrapper_my_outline_static_var(ptr noundef %0, i32 noundef %1, ptr noundef %2, ptr noundef nonnull %3) #0 {
  %5 = alloca ptr, align 8
  %6 = alloca i32, align 4
  %7 = alloca ptr, align 8
  %8 = alloca ptr, align 8
  store ptr %0, ptr %5, align 8
  store i32 %1, ptr %6, align 4
  store ptr %2, ptr %7, align 8
  store ptr %3, ptr %8, align 8
  %9 = load ptr, ptr %8, align 8
  store ptr @_ZN8MyStruct21my_outline_static_varE, ptr %9, align 8 ;; <= access ptr
  ret void
}

full ir

========================================
IR Dump for: my_inline_static_var
========================================
; ModuleID = 'incr_module_4'
source_filename = "incr_module_4"
target datalayout = "e-m:o-p270:32:32-p271:32:32-p272:64:64-i64:64-i128:128-n32:64-S128-Fn32"
target triple = "arm64-apple-macosx15.0.0"

@.str = private unnamed_addr constant [23 x i8] c"__cling__ptrcheck(off)\00", section "llvm.metadata"
@.str.1 = private unnamed_addr constant [13 x i8] c"input_line_2\00", section "llvm.metadata"
@llvm.global.annotations = appending global [1 x { ptr, ptr, ptr, i32, ptr }] [{ ptr, ptr, ptr, i32, ptr } { ptr @wrapper_my_inline_static_var, ptr @.str, ptr @.str.1, i32 3, ptr null }], section "llvm.metadata"
@llvm.used = appending global [1 x ptr] [ptr @wrapper_my_inline_static_var], section "llvm.metadata"

; Function Attrs: alwaysinline mustprogress nounwind ssp uwtable(sync)
define linkonce_odr void @wrapper_my_inline_static_var(ptr noundef %0, i32 noundef %1, ptr noundef %2, ptr noundef nonnull %3) #0 {
  %5 = alloca ptr, align 8
  %6 = alloca i32, align 4
  %7 = alloca ptr, align 8
  %8 = alloca ptr, align 8
  store ptr %0, ptr %5, align 8
  store i32 %1, ptr %6, align 4
  store ptr %2, ptr %7, align 8
  store ptr %3, ptr %8, align 8
  %9 = load ptr, ptr %8, align 8
  store i32 10086, ptr %9, align 4
  ret void
}

attributes #0 = { alwaysinline mustprogress nounwind ssp uwtable(sync) "frame-pointer"="non-leaf-no-reserve" "no-trapping-math"="true" "stack-protector-buffer-size"="8" "target-cpu"="apple-m1" "target-features"="+aes,+altnzcv,+ccdp,+ccidx,+ccpp,+complxnum,+crc,+dit,+dotprod,+flagm,+fp-armv8,+fp16fml,+fptoint,+fullfp16,+jsconv,+lse,+neon,+pauth,+perfmon,+predres,+ras,+rcpc,+rdm,+sb,+sha2,+sha3,+specrestrict,+ssbs,+v8.1a,+v8.2a,+v8.3a,+v8.4a,+v8a" }

!llvm.module.flags = !{!0, !1, !2, !3, !4}
!llvm.ident = !{!5}

!0 = !{i32 2, !"SDK Version", [2 x i32] [i32 26, i32 2]}
!1 = !{i32 1, !"wchar_size", i32 4}
!2 = !{i32 8, !"PIC Level", i32 2}
!3 = !{i32 7, !"uwtable", i32 1}
!4 = !{i32 7, !"frame-pointer", i32 4}
!5 = !{!"clang version 22.1.0-rc1 (https://github.com/jank-lang/llvm-project.git 8164f1a0c17b192e133817436bdb07598b7402a3)"}
VarDecl code generation for my_outline_static_var: Static=1 MissingDef=1 ConstUsable=0 MissingConstDef=0

========================================
IR Dump for: my_outline_static_var
========================================
; ModuleID = 'incr_module_5'
source_filename = "incr_module_5"
target datalayout = "e-m:o-p270:32:32-p271:32:32-p272:64:64-i64:64-i128:128-n32:64-S128-Fn32"
target triple = "arm64-apple-macosx15.0.0"

@_ZN8MyStruct21my_outline_static_varE = external global i32, align 4
@.str = private unnamed_addr constant [23 x i8] c"__cling__ptrcheck(off)\00", section "llvm.metadata"
@.str.1 = private unnamed_addr constant [13 x i8] c"input_line_3\00", section "llvm.metadata"
@llvm.global.annotations = appending global [1 x { ptr, ptr, ptr, i32, ptr }] [{ ptr, ptr, ptr, i32, ptr } { ptr @wrapper_my_outline_static_var, ptr @.str, ptr @.str.1, i32 3, ptr null }], section "llvm.metadata"
@llvm.used = appending global [1 x ptr] [ptr @wrapper_my_outline_static_var], section "llvm.metadata"

; Function Attrs: alwaysinline mustprogress nounwind ssp uwtable(sync)
define linkonce_odr void @wrapper_my_outline_static_var(ptr noundef %0, i32 noundef %1, ptr noundef %2, ptr noundef nonnull %3) #0 {
  %5 = alloca ptr, align 8
  %6 = alloca i32, align 4
  %7 = alloca ptr, align 8
  %8 = alloca ptr, align 8
  store ptr %0, ptr %5, align 8
  store i32 %1, ptr %6, align 4
  store ptr %2, ptr %7, align 8
  store ptr %3, ptr %8, align 8
  %9 = load ptr, ptr %8, align 8
  store ptr @_ZN8MyStruct21my_outline_static_varE, ptr %9, align 8
  ret void
}

attributes #0 = { alwaysinline mustprogress nounwind ssp uwtable(sync) "frame-pointer"="non-leaf-no-reserve" "no-trapping-math"="true" "stack-protector-buffer-size"="8" "target-cpu"="apple-m1" "target-features"="+aes,+altnzcv,+ccdp,+ccidx,+ccpp,+complxnum,+crc,+dit,+dotprod,+flagm,+fp-armv8,+fp16fml,+fptoint,+fullfp16,+jsconv,+lse,+neon,+pauth,+perfmon,+predres,+ras,+rcpc,+rdm,+sb,+sha2,+sha3,+specrestrict,+ssbs,+v8.1a,+v8.2a,+v8.3a,+v8.4a,+v8a" }

!llvm.module.flags = !{!0, !1, !2, !3, !4}
!llvm.ident = !{!5}

!0 = !{i32 2, !"SDK Version", [2 x i32] [i32 26, i32 2]}
!1 = !{i32 1, !"wchar_size", i32 4}
!2 = !{i32 8, !"PIC Level", i32 2}
!3 = !{i32 7, !"uwtable", i32 1}
!4 = !{i32 7, !"frame-pointer", i32 4}
!5 = !{!"clang version 22.1.0-rc1 (https://github.com/jank-lang/llvm-project.git 8164f1a0c17b192e133817436bdb07598b7402a3)"}