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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 %s3; RUN: opt < %s -passes='pgo-instr-gen,cgscc(coro-split),simplifycfg,early-cse' -S | FileCheck %s4 5define void @fakeresume1(ptr) {6entry:7 ret void;8}9 10define void @g() #0 {11entry:12 %id = call token @llvm.coro.id(i32 0, ptr null, ptr null, ptr null)13 %alloc = call ptr @malloc(i64 16) #314 %vFrame = call noalias nonnull ptr @llvm.coro.begin(token %id, ptr %alloc)15 16 %save = call token @llvm.coro.save(ptr null)17 call fastcc void @fakeresume1(ptr null)18 19 %suspend = call i8 @llvm.coro.suspend(token %save, i1 false)20 switch i8 %suspend, label %exit [21 i8 0, label %await.ready22 i8 1, label %exit23 ]24await.ready: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 28 %suspend2 = call i8 @llvm.coro.suspend(token %save2, i1 false)29 switch i8 %suspend2, label %exit [30 i8 0, label %exit31 i8 1, label %exit32 ]33exit:34 call void @llvm.coro.end(ptr null, i1 false, token none)35 ret void36}37 38; Verify that in the initial function resume is not marked with musttail.39; CHECK-LABEL: @g(40; CHECK-NOT: musttail call fastcc void @fakeresume1(ptr null)41 42; Verify that in the resume part resume call is marked with musttail.43; CHECK-LABEL: @g.resume(44; CHECK: call ptr @await_suspend_function45; CHECK-NEXT: call ptr @llvm.coro.subfn.addr46; CHECK-NEXT: musttail call fastcc void47; CHECK-NEXT: ret void48 49declare token @llvm.coro.id(i32, ptr readnone, ptr nocapture readonly, ptr) #150declare i1 @llvm.coro.alloc(token) #251declare i64 @llvm.coro.size.i64() #352declare ptr @llvm.coro.begin(token, ptr writeonly) #253declare token @llvm.coro.save(ptr) #254declare ptr @llvm.coro.frame() #355declare i8 @llvm.coro.suspend(token, i1) #256declare ptr @llvm.coro.free(token, ptr nocapture readonly) #157declare void @llvm.coro.end(ptr, i1, token) #258declare ptr @llvm.coro.subfn.addr(ptr nocapture readonly, i8) #159declare ptr @malloc(i64)60declare ptr @await_suspend_function(ptr %awaiter, ptr %hdl)61 62attributes #0 = { presplitcoroutine }63attributes #1 = { argmemonly nounwind readonly }64attributes #2 = { nounwind }65attributes #3 = { nounwind readnone }66