File: unreachable-loop-block.ll

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llvm-toolchain-21 1%3A21.1.6-3
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; RUN: opt -mtriple amdgcn-- -passes='print<uniformity>' -disable-output %s 2>&1 | FileCheck %s

; CHECK: DIVERGENT:  %tmp = cmpxchg volatile
define amdgpu_kernel void @unreachable_loop(i32 %tidx) #0 {
entry:
  unreachable

unreachable_loop:                                        ; preds = %do.body.i, %if.then11
  %tmp = cmpxchg volatile ptr addrspace(1) null, i32 0, i32 0 seq_cst seq_cst
  %cmp.i = extractvalue { i32, i1 } %tmp, 1
  br i1 %cmp.i, label %unreachable_loop, label %end

end:                                      ; preds = %do.body.i51, %atomicAdd_g_f.exit
  unreachable
}

attributes #0 = { norecurse nounwind }