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1; Tests that sinked lifetime markers wouldn't provent optimization2; to convert a coro.await.suspend.handle call to a musttail call.3; The difference between this and coro-split-musttail5.ll and coro-split-musttail6.ll4; is that this contains dead instruction generated during the transformation,5; which makes the optimization harder.6; RUN: opt < %s -passes='cgscc(coro-split),simplifycfg,early-cse' -S | FileCheck %s7; RUN: opt < %s -passes='pgo-instr-gen,cgscc(coro-split),simplifycfg,early-cse' -S | FileCheck %s8 9define i64 @g() #0 {10entry:11 %id = call token @llvm.coro.id(i32 0, ptr null, ptr null, ptr null)12 %alloc = call ptr @malloc(i64 16) #313 %alloc.var = alloca i6414 call void @llvm.lifetime.start.p0(ptr %alloc.var)15 %vFrame = call noalias nonnull ptr @llvm.coro.begin(token %id, ptr %alloc)16 17 %save = call token @llvm.coro.save(ptr null)18 %suspend = call i8 @llvm.coro.suspend(token %save, i1 false)19 20 switch i8 %suspend, label %exit [21 i8 0, label %await.suspend22 i8 1, label %exit23 ]24await.suspend:25 %save2 = call token @llvm.coro.save(ptr null)26 call void @llvm.coro.await.suspend.handle(ptr null, ptr null, ptr @await_suspend_function)27 %suspend2 = call i8 @llvm.coro.suspend(token %save2, i1 false)28 29 ; These (non-trivially) dead instructions are in the way.30 %gep = getelementptr inbounds i64, ptr %alloc.var, i32 031 %foo = ptrtoint ptr %gep to i6432 33 switch i8 %suspend2, label %exit [34 i8 0, label %await.ready35 i8 1, label %exit36 ]37await.ready:38 call void @consume(ptr %alloc.var)39 call void @llvm.lifetime.end.p0(ptr %alloc.var)40 br label %exit41exit:42 %result = phi i64 [0, %entry], [0, %entry], [%foo, %await.suspend], [%foo, %await.suspend], [%foo, %await.ready]43 call void @llvm.coro.end(ptr null, i1 false, token none)44 ret i64 %result45}46 47; Verify that in the resume part resume call is marked with musttail.48; CHECK-LABEL: @g.resume(49; CHECK: %[[FRAME:[0-9]+]] = call ptr @await_suspend_function(ptr null, ptr null)50; CHECK: %[[RESUMEADDR:[0-9]+]] = call ptr @llvm.coro.subfn.addr(ptr %[[FRAME]], i8 0)51; CHECK: musttail call fastcc void %[[RESUMEADDR]](ptr %[[FRAME]])52; CHECK-NEXT: ret void53 54; It has a cleanup bb.55define void @f() #0 {56entry:57 %id = call token @llvm.coro.id(i32 0, ptr null, ptr null, ptr null)58 %alloc = call ptr @malloc(i64 16) #359 %alloc.var = alloca i6460 call void @llvm.lifetime.start.p0(ptr %alloc.var)61 %vFrame = call noalias nonnull ptr @llvm.coro.begin(token %id, ptr %alloc)62 63 %save = call token @llvm.coro.save(ptr null)64 %suspend = call i8 @llvm.coro.suspend(token %save, i1 false)65 66 switch i8 %suspend, label %exit [67 i8 0, label %await.suspend68 i8 1, label %exit69 ]70await.suspend:71 %save2 = call token @llvm.coro.save(ptr null)72 call void @llvm.coro.await.suspend.handle(ptr null, ptr null, ptr @await_suspend_function)73 %suspend2 = call i8 @llvm.coro.suspend(token %save2, i1 false)74 switch i8 %suspend2, label %exit [75 i8 0, label %await.ready76 i8 1, label %cleanup77 ]78await.ready:79 call void @consume(ptr %alloc.var)80 call void @llvm.lifetime.end.p0(ptr %alloc.var)81 br label %exit82 83cleanup:84 %free.handle = call ptr @llvm.coro.free(token %id, ptr %vFrame)85 %.not = icmp eq ptr %free.handle, null86 br i1 %.not, label %exit, label %coro.free87 88coro.free:89 call void @delete(ptr nonnull %free.handle) #290 br label %exit91 92exit:93 call void @llvm.coro.end(ptr null, i1 false, token none)94 ret void95}96 97; Verify that in the resume part resume call is marked with musttail.98; CHECK-LABEL: @f.resume(99; CHECK: %[[FRAME:[0-9]+]] = call ptr @await_suspend_function(ptr null, ptr null)100; CHECK: %[[RESUMEADDR:[0-9]+]] = call ptr @llvm.coro.subfn.addr(ptr %[[FRAME]], i8 0)101; CHECK: musttail call fastcc void %[[RESUMEADDR]](ptr %[[FRAME]])102; CHECK-NEXT: ret void103 104declare token @llvm.coro.id(i32, ptr readnone, ptr nocapture readonly, ptr) #1105declare i1 @llvm.coro.alloc(token) #2106declare i64 @llvm.coro.size.i64() #3107declare ptr @llvm.coro.begin(token, ptr writeonly) #2108declare token @llvm.coro.save(ptr) #2109declare ptr @llvm.coro.frame() #3110declare i8 @llvm.coro.suspend(token, i1) #2111declare ptr @llvm.coro.free(token, ptr nocapture readonly) #1112declare void @llvm.coro.end(ptr, i1, token) #2113declare ptr @llvm.coro.subfn.addr(ptr nocapture readonly, i8) #1114declare ptr @malloc(i64)115declare void @delete(ptr nonnull) #2116declare void @consume(ptr)117declare void @llvm.lifetime.start.p0(ptr nocapture)118declare void @llvm.lifetime.end.p0(ptr nocapture)119declare ptr @await_suspend_function(ptr %awaiter, ptr %hdl)120 121attributes #0 = { presplitcoroutine }122attributes #1 = { argmemonly nounwind readonly }123attributes #2 = { nounwind }124attributes #3 = { nounwind readnone }125