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1; Tests that coro-split will optimize the lifetime.start maker of each local variable,2; sink them to the places after the suspend block.3; RUN: opt < %s -passes='cgscc(coro-split),simplifycfg,early-cse' -S | FileCheck %s4 5%"struct.std::coroutine_handle" = type { ptr }6%"struct.std::coroutine_handle.0" = type { %"struct.std::coroutine_handle" }7%"struct.lean_future<int>::Awaiter" = type { i32, %"struct.std::coroutine_handle.0" }8 9declare i1 @getcond()10declare ptr @malloc(i64)11declare void @print(i32)12 13define void @a() presplitcoroutine {14entry:15 %ref.tmp7 = alloca %"struct.lean_future<int>::Awaiter", align 816 %testval = alloca i3217 ; lifetime of %testval starts here, but not used until await.ready.18 call void @llvm.lifetime.start.p0(ptr %testval)19 %id = call token @llvm.coro.id(i32 0, ptr null, ptr null, ptr null)20 %alloc = call ptr @malloc(i64 16) #321 %vFrame = call noalias nonnull ptr @llvm.coro.begin(token %id, ptr %alloc)22 %testcond = call i1 @getcond()23 br i1 %testcond, label %if.suspend, label %else.direct24 25if.suspend:26 %save = call token @llvm.coro.save(ptr null)27 %suspend = call i8 @llvm.coro.suspend(token %save, i1 false)28 switch i8 %suspend, label %exit [29 i8 0, label %await.ready30 i8 1, label %exit31 ]32 33else.direct:34 br label %after.await35 36await.ready:37 %StrayCoroSave = call token @llvm.coro.save(ptr null)38 %val = load i32, ptr %ref.tmp739 %test = load i32, ptr %testval40 call void @print(i32 %test)41 call void @print(i32 %val)42 br label %after.await43 44after.await:45 %test1 = load i32, ptr %testval46 call void @print(i32 %test1)47 call void @llvm.lifetime.end.p0(ptr %testval)48 br label %exit49 50exit:51 call void @llvm.coro.end(ptr null, i1 false, token none)52 ret void53}54 55; CHECK-LABEL: @a.resume(56; CHECK: %[[VAL:testval.+]] = getelementptr inbounds %a.Frame57; CHECK-NOT: call void @llvm.lifetime.start.p0(ptr %{{.*}})58; CHECK: %test = load i32, ptr %[[VAL]]59 60declare token @llvm.coro.id(i32, ptr readnone, ptr nocapture readonly, ptr)61declare i1 @llvm.coro.alloc(token) #362declare noalias nonnull ptr @"\01??2@YAPEAX_K@Z"(i64) local_unnamed_addr63declare i64 @llvm.coro.size.i64() #564declare ptr @llvm.coro.begin(token, ptr writeonly) #365declare void @"\01?puts@@YAXZZ"(...)66declare token @llvm.coro.save(ptr) #367declare ptr @llvm.coro.frame() #568declare i8 @llvm.coro.suspend(token, i1) #369declare void @"\01??3@YAXPEAX@Z"(ptr) local_unnamed_addr #1070declare ptr @llvm.coro.free(token, ptr nocapture readonly) #271declare void @llvm.coro.end(ptr, i1, token) #372declare void @llvm.lifetime.start.p0(ptr nocapture) #473declare void @llvm.lifetime.end.p0(ptr nocapture) #474