lld/test/wasm/lto/tls.ll

   1 ; Test that LTO objects build with TLS and threading support can be linked into
   2 ; a single threaded binary.  Specifically the references to `__tls_base` that
   3 ; can be generated at LTO-time need to trigger the creation of the internal/fake
   4 ; `__tls_base` symbol in the linker.
   5
   6 ; RUN: llvm-as %s -o %t1.o
   7 ; RUN: wasm-ld --export=tls_int --export=get_tls %t1.o -o %t
   8 ; RUN: obj2yaml %t | FileCheck %s
   9
  10 target datalayout = "e-m:e-p:32:32-p10:8:8-p20:8:8-i64:64-f128:64-n32:64-S128-ni:1:10:20"
  11 target triple = "wasm32-unknown-emscripten"
  12
  13 @tls_int = dso_local thread_local global i32 99
  14
  15 define i32 @get_tls() #0 {
  16   %val = load i32, ptr @tls_int
  17   ret i32 %val
  18 }
  19
  20 define void @_start() #0 {
  21   ret void
  22 }
  23
  24 attributes #0 = { noinline nounwind optnone "target-features"="+atomics,+bulk-memory,+mutable-globals,+sign-ext" }
  25
  26 ;      CHECK:   - Type:            GLOBAL
  27 ; CHECK-NEXT:     Globals:
  28 ; CHECK-NEXT:       - Index:           0
  29 ; CHECK-NEXT:         Type:            I32
  30 ; CHECK-NEXT:         Mutable:         true
  31 ; CHECK-NEXT:         InitExpr:
  32 ; CHECK-NEXT:           Opcode:          I32_CONST
  33 ; CHECK-NEXT:           Value:           66576
  34 ; CHECK-NEXT:       - Index:           1
  35 ; CHECK-NEXT:         Type:            I32
  36 ; CHECK-NEXT:         Mutable:         false
  37 ; CHECK-NEXT:         InitExpr:
  38 ; CHECK-NEXT:           Opcode:          I32_CONST
  39 ; CHECK-NEXT:           Value:           1024
  40
  41 ;      CHECK:     GlobalNames:
  42 ; CHECK-NEXT:       - Index:           0
  43 ; CHECK-NEXT:         Name:            __stack_pointer
  44 ; CHECK-NEXT:       - Index:           1
  45 ; CHECK-NEXT:         Name:            __tls_base