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      1 ; RUN: llvm-as < %s | llvm-dis > %t.orig
      2 ; RUN: llvm-as < %s | llvm-c-test --echo > %t.echo
      3 ; RUN: diff -w %t.orig %t.echo
      4 
      5 define i32 @main() {
      6   %1 = alloca i32
      7   %2 = cmpxchg i32* %1, i32 2, i32 3 seq_cst acquire
      8   %3 = extractvalue { i32, i1 } %2, 0
      9   ret i32 %3
     10 }
     11