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1; Tests that coro-split will convert coro.await.suspend.handle to a musttail call.2; RUN: opt < %s -passes='cgscc(coro-split),simplifycfg,early-cse' -S | FileCheck --check-prefixes=CHECK %s3; RUN: opt < %s -passes='pgo-instr-gen,cgscc(coro-split),simplifycfg,early-cse' -S | FileCheck --check-prefixes=CHECK %s4 5define void @f() #0 {6entry:7 %id = call token @llvm.coro.id(i32 0, ptr null, ptr null, ptr null)8 %alloc = call ptr @malloc(i64 16) #39 %vFrame = call noalias nonnull ptr @llvm.coro.begin(token %id, ptr %alloc)10 11 %save = call token @llvm.coro.save(ptr null)12 %addr1 = call ptr @llvm.coro.subfn.addr(ptr null, i8 0)13 call fastcc void %addr1(ptr null)14 15 %suspend = call i8 @llvm.coro.suspend(token %save, i1 false)16 switch i8 %suspend, label %exit [17 i8 0, label %await.ready18 i8 1, label %exit19 ]20await.ready:21 %save2 = call token @llvm.coro.save(ptr null)22 call void @llvm.coro.await.suspend.handle(ptr null, ptr null, ptr @await_suspend_function)23 24 %suspend2 = call i8 @llvm.coro.suspend(token %save2, i1 false)25 switch i8 %suspend2, label %exit [26 i8 0, label %exit27 i8 1, label %exit28 ]29exit:30 call void @llvm.coro.end(ptr null, i1 false, token none)31 ret void32}33 34; Verify that in the initial function resume is not marked with musttail.35; CHECK-LABEL: @f(36; CHECK: %[[addr1:.+]] = call ptr @llvm.coro.subfn.addr(ptr null, i8 0)37; CHECK-NOT: musttail call fastcc void %[[addr1]](ptr null)38 39; Verify that in the resume part resume call is marked with musttail.40; CHECK-LABEL: @f.resume(41; CHECK: %[[addr2:.+]] = call ptr @llvm.coro.subfn.addr42; CHECK-NEXT: musttail call fastcc void %[[addr2]]43; CHECK-NEXT: ret void44 45declare token @llvm.coro.id(i32, ptr readnone, ptr nocapture readonly, ptr) #146declare i1 @llvm.coro.alloc(token) #247declare i64 @llvm.coro.size.i64() #348declare ptr @llvm.coro.begin(token, ptr writeonly) #249declare token @llvm.coro.save(ptr) #250declare ptr @llvm.coro.frame() #351declare i8 @llvm.coro.suspend(token, i1) #252declare ptr @llvm.coro.free(token, ptr nocapture readonly) #153declare void @llvm.coro.end(ptr, i1, token) #254declare ptr @llvm.coro.subfn.addr(ptr nocapture readonly, i8) #155declare ptr @malloc(i64)56declare ptr @await_suspend_function(ptr %awaiter, ptr %hdl)57 58attributes #0 = { presplitcoroutine }59attributes #1 = { argmemonly nounwind readonly }60attributes #2 = { nounwind }61attributes #3 = { nounwind readnone }62