lld/test/MachO/cstring-align.s

   1 # REQUIRES: x86
   2 # RUN: rm -rf %t; split-file %s %t
   3 # RUN: llvm-mc -filetype=obj -triple=x86_64-apple-darwin %t/align-empty.s -o %t/align-empty.o
   4 # RUN: llvm-mc -filetype=obj -triple=x86_64-apple-darwin %t/align-4-0.s -o %t/align-4-0.o
   5 # RUN: llvm-mc -filetype=obj -triple=x86_64-apple-darwin %t/align-4-2.s -o %t/align-4-2.o
   6 # RUN: llvm-mc -filetype=obj -triple=x86_64-apple-darwin %t/align-16-0.s -o %t/align-16-0.o
   7 # RUN: llvm-mc -filetype=obj -triple=x86_64-apple-darwin %t/align-16-2.s -o %t/align-16-2.o
   8 # RUN: llvm-mc -filetype=obj -triple=x86_64-apple-darwin %t/align-16-4.s -o %t/align-16-4.o
   9 # RUN: llvm-mc -filetype=obj -triple=x86_64-apple-darwin %t/align-16-8.s -o %t/align-16-8.o
  10
  11 ## Check that we preserve the alignment of cstrings. Alignment is determined
  12 ## not by section alignment but by the number of trailing zeros of the cstring's
  13 ## address in the input object file.
  14
  15 ## The non-dedup case is not particularly interesting since the null bytes don't
  16 ## get dedup'ed, meaning that the output strings get their offsets "naturally"
  17 ## preserved.
  18
  19 # RUN: %lld -dylib --no-deduplicate-strings %t/align-empty.o %t/align-4-0.o %t/align-16-0.o -o %t/align-4-0-16-0
  20 # RUN: llvm-objdump --macho --section="__TEXT,__cstring" %t/align-4-0-16-0 | \
  21 # RUN:   FileCheck %s -D#OFF1=4 -D#OFF2=16
  22 # RUN: %lld -dylib --no-deduplicate-strings %t/align-empty.o %t/align-16-0.o %t/align-4-0.o -o %t/align-16-0-4-0
  23 # RUN: llvm-objdump --macho --section="__TEXT,__cstring" %t/align-16-0-4-0 | \
  24 # RUN:   FileCheck %s -D#OFF1=16 -D#OFF2=20
  25
  26 # RUN: %lld -dylib --no-deduplicate-strings %t/align-empty.o %t/align-4-2.o %t/align-16-0.o -o %t/align-4-2-16-0
  27 # RUN: llvm-objdump --macho --section="__TEXT,__cstring" %t/align-4-2-16-0 | \
  28 # RUN:   FileCheck %s -D#OFF1=6 -D#OFF2=16
  29 # RUN: %lld -dylib --no-deduplicate-strings %t/align-empty.o %t/align-16-0.o %t/align-4-2.o -o %t/align-16-0-4-2
  30 # RUN: llvm-objdump --macho --section="__TEXT,__cstring" %t/align-16-0-4-2 | \
  31 # RUN:   FileCheck %s -D#OFF1=16 -D#OFF2=22
  32
  33 # RUN: %lld -dylib --no-deduplicate-strings %t/align-empty.o %t/align-4-0.o %t/align-16-2.o -o %t/align-4-0-16-2
  34 # RUN: llvm-objdump --macho --section="__TEXT,__cstring" %t/align-4-0-16-2 | \
  35 # RUN:   FileCheck %s -D#OFF1=4 -D#OFF2=18
  36 # RUN: %lld -dylib --no-deduplicate-strings %t/align-empty.o %t/align-16-2.o %t/align-4-0.o -o %t/align-16-2-4-0
  37 # RUN: llvm-objdump --macho --section="__TEXT,__cstring" %t/align-16-2-4-0 | \
  38 # RUN:   FileCheck %s -D#OFF1=18 -D#OFF2=20
  39
  40 # CHECK:       Contents of (__TEXT,__cstring) section
  41 # CHECK-NEXT:  [[#%.16x,START:]]     {{$}}
  42 # CHECK:       [[#%.16x,START+OFF1]] a{{$}}
  43 # CHECK:       [[#%.16x,START+OFF2]] a{{$}}
  44 # CHECK-EMPTY:
  45
  46 ## The dedup cases are more interesting...
  47
  48 ## Same offset, different alignments => pick higher alignment
  49 # RUN: %lld -dylib %t/align-empty.o %t/align-4-0.o %t/align-16-0.o -o %t/dedup-4-0-16-0
  50 # RUN: llvm-objdump --macho --section="__TEXT,__cstring" %t/dedup-4-0-16-0 | \
  51 # RUN:   FileCheck %s --check-prefix=DEDUP -D#OFF=16
  52 # RUN: %lld -dylib %t/align-empty.o %t/align-16-0.o %t/align-4-0.o -o %t/dedup-16-0-4-0
  53 # RUN: llvm-objdump --macho --section="__TEXT,__cstring" %t/dedup-16-0-4-0 | \
  54 # RUN:   FileCheck %s --check-prefix=DEDUP -D#OFF=16
  55
  56 ## 16 byte alignment vs 2 byte offset => align to 16 bytes
  57 # RUN: %lld -dylib %t/align-empty.o %t/align-4-2.o %t/align-16-0.o -o %t/dedup-4-2-16-0
  58 # RUN: llvm-objdump --macho --section="__TEXT,__cstring" %t/dedup-4-2-16-0 | \
  59 # RUN:   FileCheck %s --check-prefix=DEDUP -D#OFF=16
  60 # RUN: %lld -dylib %t/align-empty.o %t/align-16-0.o %t/align-4-2.o -o %t/dedup-16-0-4-2
  61 # RUN: llvm-objdump --macho --section="__TEXT,__cstring" %t/dedup-16-0-4-2 | \
  62 # RUN:   FileCheck %s --check-prefix=DEDUP -D#OFF=16
  63
  64 ## 4 byte alignment vs 2 byte offset => align to 4 bytes
  65 # RUN: %lld -dylib %t/align-empty.o %t/align-4-0.o %t/align-16-2.o -o %t/dedup-4-0-16-2
  66 # RUN: llvm-objdump --macho --section="__TEXT,__cstring" %t/dedup-4-0-16-2 | \
  67 # RUN:   FileCheck %s --check-prefix=DEDUP -D#OFF=4
  68 # RUN: %lld -dylib %t/align-empty.o %t/align-16-2.o %t/align-4-0.o -o %t/dedup-16-2-4-0
  69 # RUN: llvm-objdump --macho --section="__TEXT,__cstring" %t/dedup-16-2-4-0 | \
  70 # RUN:   FileCheck %s --check-prefix=DEDUP -D#OFF=4
  71
  72 ## Both inputs are 4-byte aligned, one via offset and the other via section alignment
  73 # RUN: %lld -dylib %t/align-empty.o %t/align-4-0.o %t/align-16-4.o -o %t/dedup-4-0-16-4
  74 # RUN: llvm-objdump --macho --section="__TEXT,__cstring" %t/dedup-4-0-16-4 | \
  75 # RUN:   FileCheck %s --check-prefix=DEDUP -D#OFF=4
  76 # RUN: %lld -dylib %t/align-empty.o %t/align-16-4.o %t/align-4-0.o -o %t/dedup-16-4-4-0
  77 # RUN: llvm-objdump --macho --section="__TEXT,__cstring" %t/dedup-16-4-4-0 | \
  78 # RUN:   FileCheck %s --check-prefix=DEDUP -D#OFF=4
  79
  80 ## 8-byte offset vs 4-byte section alignment => align to 8 bytes
  81 # RUN: %lld -dylib %t/align-empty.o %t/align-4-0.o %t/align-16-8.o -o %t/dedup-4-0-16-8
  82 # RUN: llvm-objdump --macho --section="__TEXT,__cstring" %t/dedup-4-0-16-8 | \
  83 # RUN:   FileCheck %s --check-prefix=DEDUP -D#OFF=8
  84 # RUN: %lld -dylib %t/align-empty.o %t/align-16-8.o %t/align-4-0.o -o %t/dedup-16-8-4-0
  85 # RUN: llvm-objdump --macho --section="__TEXT,__cstring" %t/dedup-16-8-4-0 | \
  86 # RUN:   FileCheck %s --check-prefix=DEDUP -D#OFF=8
  87
  88 # DEDUP:       Contents of (__TEXT,__cstring) section
  89 # DEDUP-NEXT:  [[#%.16x,START:]]    {{$}}
  90 # DEDUP:       [[#%.16x,START+OFF]] a{{$}}
  91 # DEDUP-EMPTY:
  92
  93 #--- align-empty.s
  94 ## We use this file to create an empty string at the start of every output
  95 ## file's .cstring section. This makes the test cases more interesting since LLD
  96 ## can't place the string "a" at the trivially-aligned zero offset.
  97 .cstring
  98 .p2align 2
  99 .asciz ""
 100
 101 #--- align-4-0.s
 102 .cstring
 103 .p2align 2
 104 .asciz "a"
 105
 106 #--- align-4-2.s
 107 .cstring
 108 .p2align 2
 109 .zero 0x2
 110 .asciz "a"
 111
 112 #--- align-16-0.s
 113 .cstring
 114 .p2align 4
 115 .asciz "a"
 116
 117 #--- align-16-2.s
 118 .cstring
 119 .p2align 4
 120 .zero 0x2
 121 .asciz "a"
 122
 123 #--- align-16-4.s
 124 .cstring
 125 .p2align 4
 126 .zero 0x4
 127 .asciz "a"
 128
 129 #--- align-16-8.s
 130 .cstring
 131 .p2align 4
 132 .zero 0x8
 133 .asciz "a"