clang/test/CodeGen/thread_local.c

   1 // RUN: %clang_cc1 -triple i686-pc-linux-gnu -std=c23 -emit-llvm -o - %s | FileCheck %s
   2
   3 // Ensure that thread_local and _Thread_local emit the same codegen. See
   4 // https://github.com/llvm/llvm-project/issues/70068 for details.
   5
   6 void func(void) {
   7   static thread_local int i = 12;
   8   static _Thread_local int j = 13;
   9
  10   extern thread_local int k;
  11   extern thread_local int l;
  12
  13   (void)k;
  14   (void)l;
  15 }
  16
  17 // CHECK:      @func.i = internal thread_local global i32 12, align 4
  18 // CHECK-NEXT: @func.j = internal thread_local global i32 13, align 4
  19 // CHECK-NEXT: @k = external thread_local global i32, align 4
  20 // CHECK-NEXT: @l = external thread_local global i32, align 4
  21
  22 // CHECK:      define dso_local void @func()
  23 // CHECK-NEXT: entry:
  24 // CHECK-NEXT: %[[K:.+]] = call align 4 ptr @llvm.threadlocal.address.p0(ptr align 4 @k)
  25 // CHECK-NEXT: load i32, ptr %[[K]], align 4
  26 // CHECK-NEXT: %[[L:.+]] = call align 4 ptr @llvm.threadlocal.address.p0(ptr align 4 @l)
  27 // CHECK-NEXT: load i32, ptr %[[L]], align 4