1; Tests that sinked lifetime markers wouldn't provent optimization 2; to convert a coro.await.suspend.handle call to a musttail call. 3; The difference between this and coro-split-musttail5.ll is that there is 4; an extra bitcast instruction in the path, which makes it harder to 5; optimize. 6; RUN: opt < %s -passes='cgscc(coro-split),simplifycfg,early-cse' -S | FileCheck %s 7; RUN: opt < %s -passes='pgo-instr-gen,cgscc(coro-split),simplifycfg,early-cse' -S | FileCheck %s 8 9declare void @fakeresume1(ptr align 8) 10 11define void @g() #0 { 12entry: 13 %id = call token @llvm.coro.id(i32 0, ptr null, ptr null, ptr null) 14 %alloc = call ptr @malloc(i64 16) #3 15 %alloc.var = alloca i64 16 call void @llvm.lifetime.start.p0(i64 1, ptr %alloc.var) 17 %vFrame = call noalias nonnull ptr @llvm.coro.begin(token %id, ptr %alloc) 18 19 %save = call token @llvm.coro.save(ptr null) 20 %suspend = call i8 @llvm.coro.suspend(token %save, i1 false) 21 22 switch i8 %suspend, label %exit [ 23 i8 0, label %await.suspend 24 i8 1, label %exit 25 ] 26await.suspend: 27 %save2 = call token @llvm.coro.save(ptr null) 28 call void @llvm.coro.await.suspend.handle(ptr null, ptr null, ptr @await_suspend_function) 29 %suspend2 = call i8 @llvm.coro.suspend(token %save2, i1 false) 30 switch i8 %suspend2, label %exit [ 31 i8 0, label %await.ready 32 i8 1, label %exit 33 ] 34await.ready: 35 call void @consume(ptr %alloc.var) 36 call void @llvm.lifetime.end.p0(i64 1, ptr %alloc.var) 37 br label %exit 38exit: 39 call i1 @llvm.coro.end(ptr null, i1 false, token none) 40 ret void 41} 42 43; Verify that in the resume part resume call is marked with musttail. 44; CHECK-LABEL: @g.resume( 45; CHECK: musttail call fastcc void 46; CHECK-NEXT: ret void 47 48; It has a cleanup bb. 49define void @f() #0 { 50entry: 51 %id = call token @llvm.coro.id(i32 0, ptr null, ptr null, ptr null) 52 %alloc = call ptr @malloc(i64 16) #3 53 %alloc.var = alloca i64 54 call void @llvm.lifetime.start.p0(i64 1, ptr %alloc.var) 55 %vFrame = call noalias nonnull ptr @llvm.coro.begin(token %id, ptr %alloc) 56 57 %save = call token @llvm.coro.save(ptr null) 58 %suspend = call i8 @llvm.coro.suspend(token %save, i1 false) 59 60 switch i8 %suspend, label %exit [ 61 i8 0, label %await.suspend 62 i8 1, label %exit 63 ] 64await.suspend: 65 %save2 = call token @llvm.coro.save(ptr null) 66 call void @llvm.coro.await.suspend.handle(ptr null, ptr null, ptr @await_suspend_function) 67 %suspend2 = call i8 @llvm.coro.suspend(token %save2, i1 false) 68 switch i8 %suspend2, label %exit [ 69 i8 0, label %await.ready 70 i8 1, label %cleanup 71 ] 72await.ready: 73 call void @consume(ptr %alloc.var) 74 call void @llvm.lifetime.end.p0(i64 1, ptr %alloc.var) 75 br label %exit 76 77cleanup: 78 %free.handle = call ptr @llvm.coro.free(token %id, ptr %vFrame) 79 %.not = icmp eq ptr %free.handle, null 80 br i1 %.not, label %exit, label %coro.free 81 82coro.free: 83 call void @delete(ptr nonnull %free.handle) #2 84 br label %exit 85 86exit: 87 call i1 @llvm.coro.end(ptr null, i1 false, token none) 88 ret void 89} 90 91; Verify that in the resume part resume call is marked with musttail. 92; CHECK-LABEL: @f.resume( 93; CHECK: musttail call fastcc void 94; CHECK-NEXT: ret void 95 96declare token @llvm.coro.id(i32, ptr readnone, ptr nocapture readonly, ptr) #1 97declare i1 @llvm.coro.alloc(token) #2 98declare i64 @llvm.coro.size.i64() #3 99declare ptr @llvm.coro.begin(token, ptr writeonly) #2 100declare token @llvm.coro.save(ptr) #2 101declare ptr @llvm.coro.frame() #3 102declare i8 @llvm.coro.suspend(token, i1) #2 103declare ptr @llvm.coro.free(token, ptr nocapture readonly) #1 104declare i1 @llvm.coro.end(ptr, i1, token) #2 105declare ptr @llvm.coro.subfn.addr(ptr nocapture readonly, i8) #1 106declare ptr @malloc(i64) 107declare void @delete(ptr nonnull) #2 108declare void @consume(ptr) 109declare void @llvm.lifetime.start.p0(i64, ptr nocapture) 110declare void @llvm.lifetime.end.p0(i64, ptr nocapture) 111declare ptr @await_suspend_function(ptr %awaiter, ptr %hdl) 112 113attributes #0 = { presplitcoroutine } 114attributes #1 = { argmemonly nounwind readonly } 115attributes #2 = { nounwind } 116attributes #3 = { nounwind readnone } 117