1; Tests that coro-split can handle the case when a code after coro.suspend uses 2; a value produces between coro.save and coro.suspend (%Result.i19) 3; and checks whether stray coro.saves are properly removed 4; RUN: opt < %s -passes='cgscc(coro-split),simplifycfg,early-cse,simplifycfg' -S | FileCheck %s 5 6%"struct.std::coroutine_handle" = type { ptr } 7%"struct.std::coroutine_handle.0" = type { %"struct.std::coroutine_handle" } 8%"struct.lean_future<int>::Awaiter" = type { i32, %"struct.std::coroutine_handle.0" } 9 10declare ptr @malloc(i64) 11declare void @print(i32) 12 13define void @a() presplitcoroutine { 14entry: 15 %ref.tmp7 = alloca %"struct.lean_future<int>::Awaiter", align 8 16 %testval = alloca i32 17 %id = call token @llvm.coro.id(i32 0, ptr null, ptr null, ptr null) 18 %alloc = call ptr @malloc(i64 16) #3 19 %vFrame = call noalias nonnull ptr @llvm.coro.begin(token %id, ptr %alloc) 20 21 %save = call token @llvm.coro.save(ptr null) 22 %suspend = call i8 @llvm.coro.suspend(token %save, i1 false) 23 switch i8 %suspend, label %exit [ 24 i8 0, label %await.ready 25 i8 1, label %exit 26 ] 27await.ready: 28 %StrayCoroSave = call token @llvm.coro.save(ptr null) 29 %val = load i32, ptr %ref.tmp7 30 call void @llvm.lifetime.start.p0(i64 4, ptr %testval) 31 %test = load i32, ptr %testval 32 call void @print(i32 %test) 33 call void @llvm.lifetime.end.p0(i64 4, ptr %testval) 34 call void @print(i32 %val) 35 br label %exit 36exit: 37 call i1 @llvm.coro.end(ptr null, i1 false, token none) 38 ret void 39} 40 41; CHECK-LABEL: @a.resume( 42; CHECK: %testval = alloca i32 43; CHECK-NOT: call token @llvm.coro.save(ptr null) 44; CHECK: %val = load i32, ptr %ref.tmp7 45; CHECK-NEXT: call void @llvm.lifetime.start.p0(i64 4, ptr %testval) 46; CHECK-NEXT: %test = load i32, ptr %testval 47; CHECK-NEXT: call void @print(i32 %test) 48; CHECK-NEXT: call void @llvm.lifetime.end.p0(i64 4, ptr %testval) 49; CHECK-NEXT: call void @print(i32 %val) 50; CHECK-NEXT: ret void 51 52declare token @llvm.coro.id(i32, ptr readnone, ptr nocapture readonly, ptr) 53declare i1 @llvm.coro.alloc(token) #3 54declare noalias nonnull ptr @"\01??2@YAPEAX_K@Z"(i64) local_unnamed_addr 55declare i64 @llvm.coro.size.i64() #5 56declare ptr @llvm.coro.begin(token, ptr writeonly) #3 57declare void @"\01?puts@@YAXZZ"(...) 58declare token @llvm.coro.save(ptr) #3 59declare ptr @llvm.coro.frame() #5 60declare i8 @llvm.coro.suspend(token, i1) #3 61declare void @"\01??3@YAXPEAX@Z"(ptr) local_unnamed_addr #10 62declare ptr @llvm.coro.free(token, ptr nocapture readonly) #2 63declare i1 @llvm.coro.end(ptr, i1, token) #3 64declare void @llvm.lifetime.start.p0(i64, ptr nocapture) #4 65declare void @llvm.lifetime.end.p0(i64, ptr nocapture) #4 66