lld/test/wasm/lto/stub-library-libcall.s

   1 # RUN: split-file %s %t
   2 # RUN: llvm-mc -filetype=obj -triple=wasm32-unknown-unknown -o %t_main.o %t/main.s
   3 # RUN: llvm-as %S/Inputs/foo.ll -o %t_foo.o
   4 # RUN: llvm-as %S/Inputs/libcall.ll -o %t_libcall.o
   5 # RUN: wasm-ld %t_main.o %t_libcall.o %t_foo.o %p/Inputs/stub.so -o %t.wasm
   6 # RUN: obj2yaml %t.wasm | FileCheck %s
   7
   8 # The function `func_with_libcall` will generate an undefined reference to
   9 # `memcpy` at LTO time.  `memcpy` itself also declared in stub.so and depends
  10 # on `foo`
  11
  12 # If %t_foo.o is not included in the link we get an undefined symbol reported
  13 # to the dependency of memcpy on the foo export:
  14
  15 # RUN: not wasm-ld %t_main.o %t_libcall.o %p/Inputs/stub.so -o %t.wasm 2>&1 | FileCheck --check-prefix=MISSING %s
  16 # MISSING: stub.so: undefined symbol: foo. Required by memcpy
  17
  18 #--- main.s
  19 .functype func_with_libcall (i32, i32) -> ()
  20 .globl _start
  21 _start:
  22     .functype _start () -> ()
  23     i32.const 0
  24     i32.const 0
  25     call func_with_libcall
  26     end_function
  27
  28 # CHECK:         Imports:
  29 # CHECK-NEXT:      - Module:          env
  30 # CHECK-NEXT:        Field:           memcpy
  31 # CHECK-NEXT:        Kind:            FUNCTION
  32 # CHECK-NEXT:        SigIndex:        0
  33
  34 # CHECK:         Exports:
  35 # CHECK-NEXT:       - Name:            memory
  36 # CHECK-NEXT:         Kind:            MEMORY
  37 # CHECK-NEXT:         Index:           0
  38 # CHECK-NEXT:       - Name:            _start
  39 # CHECK-NEXT:         Kind:            FUNCTION
  40 # CHECK-NEXT:         Index:           1
  41 # CHECK-NEXT:       - Name:            foo
  42 # CHECK-NEXT:         Kind:            FUNCTION
  43 # CHECK-NEXT:         Index:           3