lld/test/COFF/associative-comdat-mingw.s

   1 # REQUIRES: x86
   2
   3 # RUN: llvm-mc -triple=x86_64-windows-gnu %s -filetype=obj -o %t1.obj
   4 # RUN: llvm-mc -triple=x86_64-windows-gnu %S/Inputs/associative-comdat-mingw-2.s -filetype=obj -o %t2.obj
   5
   6 # RUN: lld-link -lldmingw -entry:main %t1.obj %t2.obj -out:%t.gc.exe -verbose
   7 # RUN: llvm-readobj --sections %t.gc.exe | FileCheck %s
   8
   9 # CHECK: Sections [
  10 # CHECK:   Section {
  11 # CHECK:     Number: 2
  12 # CHECK-LABEL:     Name: .rdata (2E 72 64 61 74 61 00 00)
  13 #             This is the critical check to show that only *one* definition of
  14 #             .xdata$foo was retained. This *must* be 0x24 (0x4 for the .xdata
  15 #             section and 0x20 for the .ctors/.dtors headers/ends).
  16 #             Make sure that no other .xdata sections get included, which would
  17 #             increase the size here.
  18 # CHECK-NEXT:     VirtualSize: 0x24
  19
  20         .text
  21         .def            main;
  22         .scl            2;
  23         .type           32;
  24         .endef
  25         .globl          main
  26         .p2align        4, 0x90
  27 main:
  28         call            foo
  29         retq
  30
  31 # Defines .text$foo (which has a leader symbol and is referenced like
  32 # normally), and .xdata$foo (which lacks a leader symbol, which normally
  33 # would be declared associative to the symbol foo).
  34 # .xdata$foo should be implicitly treated as associative to foo and brought
  35 # in, while .xdata$bar, implicitly associative to bar, not included, and
  36 # .xdata$baz not included since there's no symbol baz.
  37
  38 # GNU binutils ld doesn't do this at all, but always includes all .xdata/.pdata
  39 # comdat sections, even if --gc-sections is used.
  40
  41         .section        .xdata$foo,"dr"
  42         .linkonce       discard
  43         .p2align        3
  44         .long           42
  45
  46         .section        .xdata$bar,"dr"
  47         .linkonce       discard
  48         .p2align        3
  49         .long           43
  50
  51         .section        .xdata$baz,"dr"
  52         .linkonce       discard
  53         .p2align        3
  54         .long           44
  55
  56         .def            foo;
  57         .scl            2;
  58         .type           32;
  59         .endef
  60         .section        .text$foo,"xr",discard,foo
  61         .globl          foo
  62         .p2align        4
  63 foo:
  64         ret
  65
  66         .def            bar;
  67         .scl            2;
  68         .type           32;
  69         .endef
  70         .section        .text$bar,"xr",discard,bar
  71         .globl          bar
  72         .p2align        4
  73 bar:
  74         ret