File: atomics.ll

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llvm-toolchain-9 1%3A9.0.1-16
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; RUN: llvm-as < %s | llvm-dis > %t.orig
; RUN: llvm-as < %s | llvm-c-test --echo > %t.echo
; RUN: diff -w %t.orig %t.echo

define i32 @main() {
  %1 = alloca i32
  %2 = cmpxchg i32* %1, i32 2, i32 3 seq_cst acquire
  %3 = extractvalue { i32, i1 } %2, 0
  ret i32 %3
}