lld/test/MachO/eh-frame-dead-strip.s

   1 # REQUIRES: x86, aarch64
   2
   3 # RUN: rm -rf %t; split-file %s %t
   4 # RUN: llvm-mc -filetype=obj -triple=x86_64-apple-macos11.0 %t/strong.s -o %t/strong_x86_64.o
   5 # RUN: llvm-mc -filetype=obj -triple=x86_64-apple-macos11.0 %t/weak.s -o %t/weak_x86_64.o
   6 # RUN: %lld -dylib -dead_strip %t/strong_x86_64.o %t/weak_x86_64.o -o %t/libstrongweak_x86_64.dylib
   7 # RUN: llvm-dwarfdump --eh-frame %t/libstrongweak_x86_64.dylib | FileCheck --check-prefixes CHECK,X86_64 %s
   8 # RUN: %lld -dylib -dead_strip %t/weak_x86_64.o %t/strong_x86_64.o -o %t/libweakstrong_x86_64.dylib
   9 # RUN: llvm-dwarfdump --eh-frame %t/libweakstrong_x86_64.dylib | FileCheck --check-prefixes CHECK,X86_64 %s
  10
  11 # RUN: llvm-mc -filetype=obj -triple=arm64-apple-macos11.0 %t/strong.s -o %t/strong_arm64.o
  12 # RUN: llvm-mc -filetype=obj -triple=arm64-apple-macos11.0 %t/weak.s -o %t/weak_arm64.o
  13 # RUN: %lld -arch arm64 -dylib -dead_strip %t/strong_arm64.o %t/weak_arm64.o -o %t/libstrongweak_arm64.dylib
  14 # RUN: llvm-dwarfdump --eh-frame %t/libstrongweak_arm64.dylib | FileCheck --check-prefixes CHECK,ARM64 %s
  15 # RUN: %lld -arch arm64 -dylib -dead_strip %t/weak_arm64.o %t/strong_arm64.o -o %t/libweakstrong_arm64.dylib
  16 # RUN: llvm-dwarfdump --eh-frame %t/libweakstrong_arm64.dylib | FileCheck --check-prefixes CHECK,ARM64 %s
  17
  18 ## Verify that unneeded FDEs (and their CIEs) are dead-stripped even if they
  19 ## point to a live symbol (e.g. because we had multiple weak definitions).
  20
  21 # CHECK: .eh_frame contents:
  22 # X86_64: 00000000 00000014 00000000 CIE
  23 # X86_64: 00000018 0000001c 0000001c FDE cie=00000000
  24 # ARM64: 00000000 00000010 00000000 CIE
  25 # ARM64: 00000014 00000018 00000018 FDE cie=00000000
  26 # CHECK-NOT: CIE
  27 # CHECK-NOT: FDE
  28
  29 #--- strong.s
  30 .globl _fun
  31 _fun:
  32   .cfi_startproc
  33   ## cfi_escape cannot be encoded in compact unwind
  34   .cfi_escape 0
  35   ret
  36   .cfi_endproc
  37
  38 #--- weak.s
  39 .globl _fun
  40 .weak_definition _fun
  41 _fun:
  42   .cfi_startproc
  43   ## cfi_escape cannot be encoded in compact unwind
  44   .cfi_escape 0
  45   ret
  46   .cfi_endproc