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llvm/lld/test/wasm/alias.s 

# RUN: llvm-mc -filetype=obj -triple=wasm32-unknown-unknown -o %t.o %s
# RUN: wasm-ld --export=start_alias %t.o -o %t.wasm
# RUN: obj2yaml %t.wasm | FileCheck %s

  .globl  _start
_start:
  .functype _start () -> ()
  end_function

  .globl start_alias
  .type start_alias,@function
.set start_alias, _start

# CHECK:      --- !WASM
# CHECK-NEXT: FileHeader:
# CHECK-NEXT:   Version:         0x1
# CHECK-NEXT: Sections:
# CHECK-NEXT:   - Type:            TYPE
# CHECK-NEXT:     Signatures:
# CHECK-NEXT:       - Index:           0
# CHECK-NEXT:         ParamTypes:
# CHECK-NEXT:         ReturnTypes:     []
# CHECK-NEXT:   - Type:            FUNCTION
# CHECK-NEXT:     FunctionTypes:   [ 0 ]
# CHECK-NEXT:   - Type:            MEMORY
# CHECK-NEXT:     Memories:
# CHECK-NEXT:       - Minimum:         0x2
# CHECK-NEXT:   - Type:            GLOBAL
# CHECK-NEXT:     Globals:
# CHECK-NEXT:       - Index:           0
# CHECK-NEXT:         Type:            I32
# CHECK-NEXT:         Mutable:         true
# CHECK-NEXT:         InitExpr:
# CHECK-NEXT:           Opcode:          I32_CONST
# CHECK-NEXT:           Value:           66560
# CHECK-NEXT:   - Type:            EXPORT
# CHECK-NEXT:     Exports:
# CHECK-NEXT:       - Name:            memory
# CHECK-NEXT:         Kind:            MEMORY
# CHECK-NEXT:         Index:           0
# CHECK-NEXT:       - Name:            _start
# CHECK-NEXT:         Kind:            FUNCTION
# CHECK-NEXT:         Index:           0
# CHECK-NEXT:       - Name:            start_alias
# CHECK-NEXT:         Kind:            FUNCTION
# CHECK-NEXT:         Index:           0
# CHECK-NEXT:   - Type:            CODE
# CHECK-NEXT:     Functions:
# CHECK-NEXT:       - Index:           0
# CHECK-NEXT:         Locals:
# CHECK-NEXT:         Body:            0B
# CHECK-NEXT:   - Type:            CUSTOM
# CHECK-NEXT:     Name:            name
# CHECK-NEXT:     FunctionNames:
# CHECK-NEXT:       - Index:           0
# CHECK-NEXT:         Name:            _start
# CHECK-NEXT:     GlobalNames:
# CHECK-NEXT:       - Index:           0
# CHECK-NEXT:         Name:            __stack_pointer
# CHECK-NEXT: ...