llvm/test/MC/COFF/weak.s

   1 // This tests that default-null weak symbols (a GNU extension) are created
   2 // properly via the .weak directive.
   3
   4 // RUN: llvm-mc -filetype=obj -triple i686-pc-win32 %s | llvm-readobj --symbols - | FileCheck %s
   5 // RUN: llvm-mc -filetype=obj -triple x86_64-pc-win32 %s | llvm-readobj --symbols - | FileCheck %s
   6
   7     .def    _main;
   8     .scl    2;
   9     .type   32;
  10     .endef
  11     .text
  12     .globl  _main
  13     .align  16, 0x90
  14 _main:                                  # @main
  15 # %bb.0:                                # %entry
  16     subl    $4, %esp
  17     movl    $_test_weak, %eax
  18     testl   %eax, %eax
  19     je      LBB0_2
  20 # %bb.1:                                # %if.then
  21     call    _test_weak
  22     movl    $1, %eax
  23     addl    $4, %esp
  24     ret
  25 LBB0_2:                                 # %return
  26     xorl    %eax, %eax
  27     addl    $4, %esp
  28     ret
  29
  30     .weak   _test_weak
  31
  32     .weak   _test_weak_alias
  33     _test_weak_alias=_main
  34
  35     .weak weakfunc
  36     .globl weakfunc
  37 weakfunc:
  38     ret
  39
  40 // CHECK: Symbols [
  41
  42 // CHECK:      Symbol {
  43 // CHECK:        Name: _main
  44 // CHECK-NEXT:   Value: 0
  45 // CHECK-NEXT:   Section: .text
  46 // CHECK-NEXT:   BaseType: Null
  47 // CHECK-NEXT:   ComplexType: Function
  48 // CHECK-NEXT:   StorageClass: External
  49 // CHECK-NEXT:   AuxSymbolCount: 0
  50 // CHECK-NEXT: }
  51
  52 // CHECK:      Symbol {
  53 // CHECK:        Name:           _test_weak
  54 // CHECK-NEXT:   Value:          0
  55 // CHECK-NEXT:   Section:        IMAGE_SYM_UNDEFINED
  56 // CHECK-NEXT:   BaseType:       Null
  57 // CHECK-NEXT:   ComplexType:    Null
  58 // CHECK-NEXT:   StorageClass:   WeakExternal
  59 // CHECK-NEXT:   AuxSymbolCount: 1
  60 // CHECK-NEXT:   AuxWeakExternal {
  61 // CHECK-NEXT:     Linked: .weak._test_weak.default
  62 // CHECK-NEXT:      Search: Alias
  63 // CHECK-NEXT:   }
  64 // CHECK-NEXT: }
  65
  66 // CHECK:      Symbol {
  67 // CHECK:        Name:                .weak._test_weak.default._main
  68 // CHECK-NEXT:   Value:               0
  69 // CHECK-NEXT:   Section:             IMAGE_SYM_ABSOLUTE
  70 // CHECK-NEXT:   BaseType:            Null
  71 // CHECK-NEXT:   ComplexType:         Null
  72 // CHECK-NEXT:   StorageClass:        External
  73 // CHECK-NEXT:   AuxSymbolCount:      0
  74 // CHECK-NEXT: }
  75
  76 // CHECK:      Symbol {
  77 // CHECK:        Name:           _test_weak_alias
  78 // CHECK-NEXT:   Value:          0
  79 // CHECK-NEXT:   Section:        IMAGE_SYM_UNDEFINED
  80 // CHECK-NEXT:   BaseType:       Null
  81 // CHECK-NEXT:   ComplexType:    Null
  82 // CHECK-NEXT:   StorageClass:   WeakExternal
  83 // CHECK-NEXT:   AuxSymbolCount: 1
  84 // CHECK-NEXT:   AuxWeakExternal {
  85 // CHECK-NEXT:     Linked: _main
  86 // CHECK-NEXT:     Search: Alias
  87 // CHECK-NEXT:   }
  88 // CHECK-NEXT: }
  89
  90 // CHECK:      Symbol {
  91 // CHECK:        Name:           weakfunc
  92 // CHECK-NEXT:   Value:          0
  93 // CHECK-NEXT:   Section:        IMAGE_SYM_UNDEFINED
  94 // CHECK-NEXT:   BaseType:       Null
  95 // CHECK-NEXT:   ComplexType:    Null
  96 // CHECK-NEXT:   StorageClass:   WeakExternal
  97 // CHECK-NEXT:   AuxSymbolCount: 1
  98 // CHECK-NEXT:   AuxWeakExternal {
  99 // CHECK-NEXT:     Linked: .weak.weakfunc.default
 100 // CHECK-NEXT:     Search: Alias
 101 // CHECK-NEXT:   }
 102 // CHECK-NEXT: }
 103 // CHECK:      Symbol {
 104 // CHECK:        Name:           .weak.weakfunc.default
 105 // CHECK-NOT:    Value:          0
 106 // CHECK-NOT:  Symbol {
 107 // CHECK:        Section:        .text
 108 // CHECK-NEXT:   BaseType:       Null
 109 // CHECK-NEXT:   ComplexType:    Null
 110 // CHECK-NEXT:   StorageClass:   External
 111 // CHECK-NEXT:   AuxSymbolCount: 0
 112 // CHECK-NEXT: }