1; Tests that variables in a Corotuine whose lifetime range is not overlapping each other 2; re-use the same slot in Coroutine frame. 3; RUN: opt < %s -passes='cgscc(coro-split<reuse-storage>),simplifycfg,early-cse' -S | FileCheck %s 4%"struct.task::promise_type" = type { i8 } 5%struct.awaitable = type { i8 } 6%struct.big_structure = type { [500 x i8] } 7declare ptr @malloc(i64) 8declare void @consume(ptr) 9define void @a(i1 zeroext %cond) presplitcoroutine { 10entry: 11 %__promise = alloca %"struct.task::promise_type", align 1 12 %a = alloca %struct.big_structure, align 1 13 %ref.tmp7 = alloca %struct.awaitable, align 1 14 %b = alloca %struct.big_structure, align 1 15 %ref.tmp18 = alloca %struct.awaitable, align 1 16 %0 = call token @llvm.coro.id(i32 16, ptr nonnull %__promise, ptr @a, ptr null) 17 br label %init.ready 18init.ready: 19 %1 = call noalias nonnull ptr @llvm.coro.begin(token %0, ptr null) 20 call void @llvm.lifetime.start.p0(i64 1, ptr nonnull %__promise) 21 br i1 %cond, label %if.then, label %if.else 22if.then: 23 call void @llvm.lifetime.start.p0(i64 500, ptr nonnull %a) 24 call void @consume(ptr nonnull %a) 25 %save = call token @llvm.coro.save(ptr null) 26 %suspend = call i8 @llvm.coro.suspend(token %save, i1 false) 27 switch i8 %suspend, label %coro.ret [ 28 i8 0, label %await.ready 29 i8 1, label %cleanup1 30 ] 31await.ready: 32 call void @llvm.lifetime.end.p0(i64 500, ptr nonnull %a) 33 br label %cleanup1 34if.else: 35 call void @llvm.lifetime.start.p0(i64 500, ptr nonnull %b) 36 call void @consume(ptr nonnull %b) 37 %save2 = call token @llvm.coro.save(ptr null) 38 %suspend2 = call i8 @llvm.coro.suspend(token %save2, i1 false) 39 switch i8 %suspend2, label %coro.ret [ 40 i8 0, label %await2.ready 41 i8 1, label %cleanup2 42 ] 43await2.ready: 44 call void @llvm.lifetime.end.p0(i64 500, ptr nonnull %b) 45 br label %cleanup2 46cleanup1: 47 call void @llvm.lifetime.end.p0(i64 500, ptr nonnull %a) 48 br label %cleanup 49cleanup2: 50 call void @llvm.lifetime.end.p0(i64 500, ptr nonnull %b) 51 br label %cleanup 52cleanup: 53 call ptr @llvm.coro.free(token %0, ptr %1) 54 br label %coro.ret 55coro.ret: 56 call i1 @llvm.coro.end(ptr null, i1 false, token none) 57 ret void 58} 59 60; check that there is only one %struct.big_structure in the frame. 61; CHECK: %a.Frame = type { ptr, ptr, %"struct.task::promise_type", %struct.big_structure, i1 } 62 63declare token @llvm.coro.id(i32, ptr readnone, ptr nocapture readonly, ptr) 64declare i1 @llvm.coro.alloc(token) #3 65declare i64 @llvm.coro.size.i64() #5 66declare ptr @llvm.coro.begin(token, ptr writeonly) #3 67declare token @llvm.coro.save(ptr) #3 68declare ptr @llvm.coro.frame() #5 69declare i8 @llvm.coro.suspend(token, i1) #3 70declare ptr @llvm.coro.free(token, ptr nocapture readonly) #2 71declare i1 @llvm.coro.end(ptr, i1, token) #3 72declare void @llvm.lifetime.start.p0(i64, ptr nocapture) #4 73declare void @llvm.lifetime.end.p0(i64, ptr nocapture) #4 74