lld/test/ELF/ppc64-toc-relax-constants.s

   1 # REQUIRES: ppc
   2
   3 # RUN: llvm-mc -filetype=obj -triple=powerpc64le-unkown-linux %p/Inputs/ppc64-toc-relax-shared.s -o %t.o
   4 # RUN: ld.lld -shared -soname=t.so %t.o -o %t.so
   5 # RUN: llvm-mc -filetype=obj -triple=powerpc64le-unknown-linux %s -o %t1.o
   6 # RUN: llvm-mc -filetype=obj -triple=powerpc64le-unknown-linux %p/Inputs/ppc64-toc-relax.s -o %t2.o
   7 # RUN: llvm-readobj -r %t1.o | FileCheck --check-prefix=RELOCS %s
   8 # RUN: ld.lld %t1.o %t2.o %t.so -o %t
   9 # RUN: llvm-readelf -S %t | FileCheck --check-prefix=SECTIONS %s
  10 # RUN: llvm-nm %t | FileCheck --check-prefix=NM %s
  11 # RUN: llvm-objdump -D %t | FileCheck %s
  12
  13 # In most cases, .toc contains exclusively addresses relocated by R_PPC64_ADDR16.
  14 # Rarely .toc contain constants or variables.
  15 # Test we can still perform toc-indirect to toc-relative relaxation.
  16
  17 # RELOCS:      .rela.text {
  18 # RELOCS-NEXT:   0x0 R_PPC64_TOC16_HA .toc 0x0
  19 # RELOCS-NEXT:   0x4 R_PPC64_TOC16_LO_DS .toc 0x0
  20 # RELOCS-NEXT:   0x8 R_PPC64_TOC16_HA .toc 0x8
  21 # RELOCS-NEXT:   0xC R_PPC64_TOC16_LO_DS .toc 0x8
  22 # RELOCS-NEXT:   0x10 R_PPC64_TOC16_HA .toc 0x10
  23 # RELOCS-NEXT:   0x14 R_PPC64_TOC16_LO_DS .toc 0x10
  24 # RELOCS-NEXT: }
  25
  26 # SECTIONS: .got              PROGBITS        0000000010020308
  27 # SECTIONS: .toc              PROGBITS        0000000010020308
  28
  29 # NM: 0000000010030320 D default
  30
  31 # .LCONST1 is .toc[0].
  32 # .LCONST1 - (.got+0x8000) = 0x10020350 - (0x10020350+0x8000) = -32768
  33 # CHECK: nop
  34 # CHECK: lwa 3, -32768(2)
  35   addis 3, 2, .LCONST1@toc@ha
  36   lwa 3, .LCONST1@toc@l(3)
  37
  38 # .LCONST2 is .toc[1]
  39 # .LCONST2 - (.got+0x8000) = 0x10020358 - (0x10020350+0x8000) = -32760
  40 # CHECK: nop
  41 # CHECK: ld 4, -32760(2)
  42   addis 4, 2, .LCONST2@toc@ha
  43   ld 4, .LCONST2@toc@l(4)
  44
  45 # .Ldefault is .toc[2]. `default` is not preemptable when producing an executable.
  46 # After toc-indirection to toc-relative relaxation, it is loaded using an
  47 # offset relative to r2.
  48 # CHECK: addis 5, 2, 1
  49 # CHECK: addi 5, 5, -32744
  50 # CHECK: lwa 5, 0(5)
  51   addis 5, 2, .Ldefault@toc@ha
  52   ld    5, .Ldefault@toc@l(5)
  53   lwa   5, 0(5)
  54
  55 .section .toc,"aw",@progbits
  56 .LCONST1:
  57   .quad 11
  58 .LCONST2:
  59   .quad 22
  60 .Ldefault:
  61   .tc default[TC],default