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; Tests lowerings of different versions of coro.await.suspend
; 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 {
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)
%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: call void @await_suspend_wrapper_void(ptr %[[AWAITER]], ptr %[[HDL]])
; CHECK-NEXT: br label %{{.*}}
step:
%save = call token @llvm.coro.save(ptr null)
call void @llvm.coro.await.suspend.void(ptr %awaiter, ptr %hdl, ptr @await_suspend_wrapper_void)
%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:.+]] = call i1 @await_suspend_wrapper_bool(ptr %[[AWAITER]], ptr %[[HDL]])
; CHECK-NEXT: br i1 %[[RESUME]], label %{{[^,]+}}, label %[[STEP2:.+]]
step1:
%save1 = call token @llvm.coro.save(ptr null)
%resume.bool = call i1 @llvm.coro.await.suspend.bool(ptr %awaiter, ptr %hdl, ptr @await_suspend_wrapper_bool)
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:.+]] = call ptr @await_suspend_wrapper_handle(ptr %[[AWAITER]], ptr %[[HDL]])
; CHECK-NEXT: %[[CONT:.+]] = call ptr @llvm.coro.subfn.addr(ptr %[[NEXT_HDL]], i8 0)
; CHECK-NEXT: musttail call {{.*}} void %[[CONT]](ptr %[[NEXT_HDL]])
step2:
%save2 = call token @llvm.coro.save(ptr null)
call void @llvm.coro.await.suspend.handle(ptr %awaiter, ptr %hdl, ptr @await_suspend_wrapper_handle)
%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
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 noalias ptr @malloc(i32)
declare void @free(ptr)
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