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,simplifycfg' -S | FileCheck %s 4 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 ptr @malloc(i64) 10declare void @print(i32) 11declare void @consume.i8(i8) 12 13define void @a() presplitcoroutine { 14entry: 15 %ref.tmp7 = alloca %"struct.lean_future<int>::Awaiter", align 8 16 %testval = alloca i8 17 ; lifetime of %testval starts here, but not used until await.ready. 18 call void @llvm.lifetime.start.p0(i64 1, ptr %testval) 19 %id = call token @llvm.coro.id(i32 0, ptr null, ptr null, ptr null) 20 %alloc = call ptr @malloc(i64 16) #3 21 %vFrame = call noalias nonnull ptr @llvm.coro.begin(token %id, ptr %alloc) 22 23 %save = call token @llvm.coro.save(ptr null) 24 %suspend = call i8 @llvm.coro.suspend(token %save, i1 false) 25 switch i8 %suspend, label %exit [ 26 i8 0, label %await.ready 27 i8 1, label %exit 28 ] 29await.ready: 30 %StrayCoroSave = call token @llvm.coro.save(ptr null) 31 %val = load i32, ptr %ref.tmp7 32 %test = load i8, ptr %testval 33 call void @consume.i8(i8 %test) 34 call void @llvm.lifetime.end.p0(i64 1, ptr %testval) 35 call void @print(i32 %val) 36 br label %exit 37exit: 38 call i1 @llvm.coro.end(ptr null, i1 false, token none) 39 ret void 40} 41 42; CHECK-LABEL: @a.resume( 43; CHECK: %testval = alloca i8, align 1 44; CHECK: call void @llvm.lifetime.start.p0(i64 1, ptr %testval) 45; CHECK-NEXT: %val = load i32, ptr %ref.tmp7 46; CHECK-NEXT: %test = load i8, ptr %testval 47; CHECK-NEXT: call void @consume.i8(i8 %test) 48; CHECK-NEXT: call void @llvm.lifetime.end.p0(i64 1, ptr %testval) 49; CHECK-NEXT: call void @print(i32 %val) 50; CHECK-NEXT: ret void 51 52 53declare token @llvm.coro.id(i32, ptr readnone, ptr nocapture readonly, ptr) 54declare i1 @llvm.coro.alloc(token) #3 55declare noalias nonnull ptr @"\01??2@YAPEAX_K@Z"(i64) local_unnamed_addr 56declare i64 @llvm.coro.size.i64() #5 57declare ptr @llvm.coro.begin(token, ptr writeonly) #3 58declare void @"\01?puts@@YAXZZ"(...) 59declare token @llvm.coro.save(ptr) #3 60declare ptr @llvm.coro.frame() #5 61declare i8 @llvm.coro.suspend(token, i1) #3 62declare void @"\01??3@YAXPEAX@Z"(ptr) local_unnamed_addr #10 63declare ptr @llvm.coro.free(token, ptr nocapture readonly) #2 64declare i1 @llvm.coro.end(ptr, i1, token) #3 65declare void @llvm.lifetime.start.p0(i64, ptr nocapture) #4 66declare void @llvm.lifetime.end.p0(i64, ptr nocapture) #4 67