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1; Tests that coro-split can handle the case when a code after coro.suspend uses2; a value produces between coro.save and coro.suspend (%Result.i19)3; and checks whether stray coro.saves are properly removed4; RUN: opt < %s -passes='cgscc(coro-split),simplifycfg,early-cse,simplifycfg' -S | FileCheck %s5 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 816 %testval = alloca i3217 %id = call token @llvm.coro.id(i32 0, ptr null, ptr null, ptr null)18 %alloc = call ptr @malloc(i64 16) #319 %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.ready25 i8 1, label %exit26 ]27await.ready:28 %StrayCoroSave = call token @llvm.coro.save(ptr null)29 %val = load i32, ptr %ref.tmp730 call void @llvm.lifetime.start.p0(ptr %testval)31 %test = load i32, ptr %testval32 call void @print(i32 %test)33 call void @llvm.lifetime.end.p0(ptr %testval)34 call void @print(i32 %val)35 br label %exit36exit:37 call void @llvm.coro.end(ptr null, i1 false, token none)38 ret void39}40 41; CHECK-LABEL: @a.resume(42; CHECK: %testval = alloca i3243; CHECK-NOT: call token @llvm.coro.save(ptr null)44; CHECK: %val = load i32, ptr %ref.tmp745; CHECK-NEXT: call void @llvm.lifetime.start.p0(ptr %testval)46; CHECK-NEXT: %test = load i32, ptr %testval47; CHECK-NEXT: call void @print(i32 %test)48; CHECK-NEXT: call void @llvm.lifetime.end.p0(ptr %testval)49; CHECK-NEXT: call void @print(i32 %val)50; CHECK-NEXT: ret void51 52declare token @llvm.coro.id(i32, ptr readnone, ptr nocapture readonly, ptr)53declare i1 @llvm.coro.alloc(token) #354declare noalias nonnull ptr @"\01??2@YAPEAX_K@Z"(i64) local_unnamed_addr55declare i64 @llvm.coro.size.i64() #556declare ptr @llvm.coro.begin(token, ptr writeonly) #357declare void @"\01?puts@@YAXZZ"(...)58declare token @llvm.coro.save(ptr) #359declare ptr @llvm.coro.frame() #560declare i8 @llvm.coro.suspend(token, i1) #361declare void @"\01??3@YAXPEAX@Z"(ptr) local_unnamed_addr #1062declare ptr @llvm.coro.free(token, ptr nocapture readonly) #263declare void @llvm.coro.end(ptr, i1, token) #364declare void @llvm.lifetime.start.p0(ptr nocapture) #465declare void @llvm.lifetime.end.p0(ptr nocapture) #466