llvm/test/Transforms/Coroutines/coro-frame-unreachable.ll

; Check that coro-split doesn't choke on intrinsics in unreachable blocks
; RUN: opt < %s -coro-split -S
; RUN: opt < %s -passes=coro-split -S

define i8* @f(i1 %arg) "coroutine.presplit"="1" personality i32 0 {
entry:
  %arg.addr = alloca i1
  store i1 %arg, i1* %arg.addr
  %id = call token @llvm.coro.id(i32 0, i8* null, i8* null, i8* null)
  %size = call i32 @llvm.coro.size.i32()
  %alloc = call i8* @malloc(i32 %size)
  %hdl = call i8* @llvm.coro.begin(token %id, i8* %alloc)
  br label %cont

cont:
  %0 = call i8 @llvm.coro.suspend(token none, i1 false)
  switch i8 %0, label %suspend [i8 0, label %resume
                                i8 1, label %cleanup]
resume:
  br label %cleanup

cleanup:
  %mem = call i8* @llvm.coro.free(token %id, i8* %hdl)
  call void @free(i8* %mem)
  br label %suspend

suspend:
  call i1 @llvm.coro.end(i8* %hdl, i1 0)
  ret i8* %hdl

no.predecessors:
  %argval = load i1, i1* %arg.addr
  call void @print(i1 %argval)
  br label %suspend

}

declare i8* @llvm.coro.free(token, i8*)
declare i32 @llvm.coro.size.i32()
declare i8  @llvm.coro.suspend(token, i1)
declare void @llvm.coro.resume(i8*)
declare void @llvm.coro.destroy(i8*)

declare token @llvm.coro.id(i32, i8*, i8*, i8*)
declare i1 @llvm.coro.alloc(token)
declare i8* @llvm.coro.begin(token, i8*)
declare i1 @llvm.coro.end(i8*, i1)

declare noalias i8* @malloc(i32)
declare void @print(i1)
declare void @free(i8*)