test/Transforms/Coroutines/coro-await-suspend-lower-invoke.ll

; Tests that invoke <type> @llvm.coro.await.suspend lowers to invoke @helper
; RUN: opt < %s -passes='module(coro-early),cgscc(coro-split),simplifycfg' -S | FileCheck %s

%Awaiter = type {}

; CHECK:     define {{[^@]*}} @f.resume(ptr {{[^%]*}} %[[HDL:.+]])
; CHECK:       %[[AWAITER:.+]] = getelementptr inbounds %f.Frame, ptr %[[HDL]], i32 0, i32 0
define void @f() presplitcoroutine personality i32 0 {
entry:
  %awaiter = alloca %Awaiter
  %id = call token @llvm.coro.id(i32 0, ptr null, ptr null, ptr null)
  %size = call i32 @llvm.coro.size.i32()
  %alloc = call ptr @malloc(i32 %size)
  %hdl = call ptr @llvm.coro.begin(token %id, ptr %alloc)
  ; Initial suspend so that all 3 await_suspend invocations are inside f.resume
  %suspend.init = call i8 @llvm.coro.suspend(token none, i1 false)
  switch i8 %suspend.init, label %ret [
    i8 0, label %step
    i8 1, label %cleanup
  ]

; CHECK:        invoke void @await_suspend_wrapper_void(ptr %[[AWAITER]], ptr %[[HDL]])
; CHECK-NEXT:       to label %[[STEP_CONT:[^ ]+]] unwind label %[[PAD:[^ ]+]]
step:
  %save = call token @llvm.coro.save(ptr null)
  invoke void @llvm.coro.await.suspend.void(ptr %awaiter, ptr %hdl, ptr @await_suspend_wrapper_void)
    to label %step.continue unwind label %pad

; CHECK       [[STEP_CONT]]:
step.continue:
  %suspend = call i8 @llvm.coro.suspend(token %save, i1 false)
  switch i8 %suspend, label %ret [
    i8 0, label %step1
    i8 1, label %cleanup
  ]

; CHECK:        %[[RESUME:.+]] = invoke i1 @await_suspend_wrapper_bool(ptr %[[AWAITER]], ptr %[[HDL]])
; CHECK-NEXT:       to label %[[STEP1_CONT:[^ ]+]] unwind label %[[PAD]]
step1:
  %save1 = call token @llvm.coro.save(ptr null)
  %resume.bool = invoke i1 @llvm.coro.await.suspend.bool(ptr %awaiter, ptr %hdl, ptr @await_suspend_wrapper_bool)
    to label %step1.continue unwind label %pad

; CHECK:      [[STEP1_CONT]]:
; CHECK-NEXT:   br i1 %[[RESUME]], label %{{[^,]+}}, label %[[STEP2:.+]]
step1.continue:
  br i1 %resume.bool, label %suspend.cond, label %step2

suspend.cond:
  %suspend1 = call i8 @llvm.coro.suspend(token %save1, i1 false)
  switch i8 %suspend1, label %ret [
    i8 0, label %step2
    i8 1, label %cleanup
  ]

; CHECK:      [[STEP2]]:
; CHECK:        %[[NEXT_HDL:.+]] = invoke ptr @await_suspend_wrapper_handle(ptr %[[AWAITER]], ptr %[[HDL]])
; CHECK-NEXT:       to label %[[STEP2_CONT:[^ ]+]] unwind label %[[PAD]]
step2:
  %save2 = call token @llvm.coro.save(ptr null)
  invoke void @llvm.coro.await.suspend.handle(ptr %awaiter, ptr %hdl, ptr @await_suspend_wrapper_handle)
    to label %step2.continue unwind label %pad

; CHECK:      [[STEP2_CONT]]:
; CHECK-NEXT:   %[[NEXT_RESUME:.+]] = call ptr @llvm.coro.subfn.addr(ptr %[[NEXT_HDL]], i8 0)
; CHECK-NEXT:   musttail call {{.*}} void %[[NEXT_RESUME]](ptr %[[NEXT_HDL]])
step2.continue:
  %suspend2 = call i8 @llvm.coro.suspend(token %save2, i1 false)
  switch i8 %suspend2, label %ret [
    i8 0, label %step3
    i8 1, label %cleanup
  ]

step3:
  br label %cleanup

pad:
  %lp = landingpad { ptr, i32 }
          catch ptr null
  %exn = extractvalue { ptr, i32 } %lp, 0
  call ptr @__cxa_begin_catch(ptr %exn)
  call void @__cxa_end_catch()
  br label %cleanup

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

ret:
  call i1 @llvm.coro.end(ptr %hdl, i1 0, token none)
  ret void
}

; check that we were haven't accidentally went out of @f.resume body
; CHECK-LABEL: @f.destroy(
; CHECK-LABEL: @f.cleanup(

declare void @await_suspend_wrapper_void(ptr, ptr)
declare i1 @await_suspend_wrapper_bool(ptr, ptr)
declare ptr @await_suspend_wrapper_handle(ptr, ptr)

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

declare token @llvm.coro.id(i32, ptr, ptr, ptr)
declare i1 @llvm.coro.alloc(token)
declare ptr @llvm.coro.begin(token, ptr)
declare void @llvm.coro.await.suspend.void(ptr, ptr, ptr)
declare i1 @llvm.coro.await.suspend.bool(ptr, ptr, ptr)
declare void @llvm.coro.await.suspend.handle(ptr, ptr, ptr)
declare i1 @llvm.coro.end(ptr, i1, token)

declare ptr @__cxa_begin_catch(ptr)
declare void @use_val(i32)
declare void @__cxa_end_catch()

declare noalias ptr @malloc(i32)
declare void @free(ptr)