lld/test/COFF/associative-comdat.s

   1 # REQUIRES: x86
   2 # RUN: llvm-mc -triple=x86_64-windows-msvc %s -filetype=obj -o %t1.obj
   3 # RUN: llvm-mc -triple=x86_64-windows-msvc %S/Inputs/associative-comdat-2.s -filetype=obj -o %t2.obj
   4
   5 # RUN: lld-link -entry:main %t1.obj %t2.obj -out:%t.gc.exe
   6 # RUN: llvm-readobj --sections %t.gc.exe | FileCheck %s
   7
   8 # RUN: lld-link -entry:main %t1.obj %t2.obj -opt:noref -out:%t.nogc.exe
   9 # RUN: llvm-readobj --sections %t.nogc.exe | FileCheck %s
  10
  11 # CHECK: Sections [
  12 # CHECK:   Section {
  13 # CHECK:     Number: 2
  14 # CHECK-LABEL:     Name: .rdata (2E 72 64 61 74 61 00 00)
  15 #             This is the critical check to show that only *one* definition of
  16 #             foo_assoc was retained. This *must* be 8, not 16.
  17 # CHECK-NEXT:     VirtualSize: 0x8
  18 # CHECK:   Section {
  19 # CHECK:     Number: 3
  20 # CHECK-LABEL:     Name: .data (2E 64 61 74 61 00 00 00)
  21 # CHECK-NEXT:     VirtualSize: 0x4
  22
  23         .text
  24         .def     main;
  25         .scl    2;
  26         .type   32;
  27         .endef
  28         .globl  main                    # -- Begin function main
  29         .p2align        4, 0x90
  30 main:                                   # @main
  31 # BB#0:
  32         movl    foo(%rip), %eax
  33         retq
  34                                         # -- End function
  35
  36 # Defines foo and foo_assoc globals. foo is comdat, and foo_assoc is comdat
  37 # associative with it. foo_assoc should be discarded iff foo is discarded,
  38 # either by linker GC or normal comdat merging.
  39
  40         .section        .rdata,"dr",associative,foo
  41         .p2align        3
  42         .quad   foo
  43
  44         .section        .data,"dw",discard,foo
  45         .globl  foo                     # @foo
  46         .p2align        2
  47 foo:
  48         .long   42