lld/test/ELF/ppc64-toc-restore.s

   1 // REQUIRES: ppc
   2
   3 // RUN: llvm-mc -filetype=obj -triple=powerpc64le-unknown-linux %s -o %t.o
   4 // RUN: llvm-mc -filetype=obj -triple=powerpc64le-unknown-linux %p/Inputs/shared-ppc64.s -o %t2.o
   5 // RUN: llvm-mc -filetype=obj -triple=powerpc64le-unknown-linux %p/Inputs/ppc64-func.s -o %t3.o
   6 // RUN: ld.lld -shared -soname=t2.so %t2.o -o %t2.so
   7 // RUN: ld.lld %t.o %t2.so %t3.o -o %t
   8 // RUN: llvm-objdump -d --no-show-raw-insn %t | FileCheck %s
   9
  10 // RUN: llvm-mc -filetype=obj -triple=powerpc64-unknown-linux %s -o %t.o
  11 // RUN: llvm-mc -filetype=obj -triple=powerpc64-unknown-linux %p/Inputs/shared-ppc64.s -o %t2.o
  12 // RUN: llvm-mc -filetype=obj -triple=powerpc64-unknown-linux %p/Inputs/ppc64-func.s -o %t3.o
  13 // RUN: ld.lld -shared -soname=t2.so %t2.o -o %t2.so
  14 // RUN: ld.lld %t.o %t2.so %t3.o -o %t
  15 // RUN: llvm-objdump -d --no-show-raw-insn %t | FileCheck %s
  16
  17     .text
  18     .abiversion 2
  19 .global bar_local
  20 bar_local:
  21   li 3, 2
  22   blr
  23
  24 # Calling external function foo in a shared object needs a nop.
  25 # Calling local function bar_local doe not need a nop.
  26 .global _start
  27 _start:
  28   bl foo
  29   nop
  30   bl bar_local
  31 // CHECK-LABEL: <_start>:
  32 // CHECK-NEXT:  100102c8:       bl 0x10010310
  33 // CHECK-NEXT:  100102cc:       ld 2, 24(1)
  34 // CHECK-NEXT:  100102d0:       bl 0x100102c0
  35 // CHECK-EMPTY:
  36
  37 # Calling a function in another object file which will have same
  38 # TOC base does not need a nop. If nop present, do not rewrite to
  39 # a toc restore
  40 .global diff_object
  41 _diff_object:
  42   bl foo_not_shared
  43   bl foo_not_shared
  44   nop
  45 // CHECK-LABEL: <_diff_object>:
  46 // CHECK-NEXT:  100102d4:       bl 0x100102f0
  47 // CHECK-NEXT:  100102d8:       bl 0x100102f0
  48 // CHECK-NEXT:  100102dc:       nop
  49
  50 # Branching to a local function does not need a nop
  51 .global noretbranch
  52 noretbranch:
  53   b bar_local
  54 // CHECK-LABEL: <noretbranch>:
  55 // CHECK-NEXT:  100102e0:        b 0x100102c0
  56 // CHECK-EMPTY:
  57
  58 // This should come last to check the end-of-buffer condition.
  59 .global last
  60 last:
  61   bl foo
  62   nop
  63 // CHECK-LABEL: <last>:
  64 // CHECK-NEXT:  100102e4:       bl 0x10010310
  65 // CHECK-NEXT:  100102e8:       ld 2, 24(1)