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1; Tests that CoroSplit can succesfully determine allocas should live on the frame2; if their aliases are used across suspension points through PHINode.3; RUN: opt < %s -passes='cgscc(coro-split),simplifycfg,early-cse' -S | FileCheck %s4 5define ptr @f(i1 %n) presplitcoroutine {6entry:7 %x = alloca i648 %y = alloca i649 %id = call token @llvm.coro.id(i32 0, ptr null, ptr null, ptr null)10 %size = call i32 @llvm.coro.size.i32()11 %alloc = call ptr @malloc(i32 %size)12 %hdl = call ptr @llvm.coro.begin(token %id, ptr %alloc)13 br i1 %n, label %flag_true, label %flag_false14 15flag_true:16 br label %merge17 18flag_false:19 br label %merge20 21merge:22 %alias_phi = phi ptr [ %x, %flag_true ], [ %y, %flag_false ]23 %sp1 = call i8 @llvm.coro.suspend(token none, i1 false)24 switch i8 %sp1, label %suspend [i8 0, label %resume25 i8 1, label %cleanup]26resume:27 call void @print(ptr %alias_phi)28 br label %cleanup29 30cleanup:31 %mem = call ptr @llvm.coro.free(token %id, ptr %hdl)32 call void @free(ptr %mem)33 br label %suspend34 35suspend:36 call void @llvm.coro.end(ptr %hdl, i1 0, token none)37 ret ptr %hdl38}39 40; both %x and %y, as well as %alias_phi would all go to the frame.41; CHECK: %f.Frame = type { ptr, ptr, i64, i64, ptr, i1 }42; CHECK-LABEL: @f(43; CHECK: %x.reload.addr = getelementptr inbounds %f.Frame, ptr %hdl, i32 0, i32 244; CHECK: %y.reload.addr = getelementptr inbounds %f.Frame, ptr %hdl, i32 0, i32 345; CHECK: %alias_phi = phi ptr [ %y.reload.addr, %merge.from.flag_false ], [ %x.reload.addr, %entry ]46; CHECK: %alias_phi.spill.addr = getelementptr inbounds %f.Frame, ptr %hdl, i32 0, i32 447; CHECK: store ptr %alias_phi, ptr %alias_phi.spill.addr, align 848 49declare ptr @llvm.coro.free(token, ptr)50declare i32 @llvm.coro.size.i32()51declare i8 @llvm.coro.suspend(token, i1)52declare void @llvm.coro.resume(ptr)53declare void @llvm.coro.destroy(ptr)54 55declare token @llvm.coro.id(i32, ptr, ptr, ptr)56declare i1 @llvm.coro.alloc(token)57declare ptr @llvm.coro.begin(token, ptr)58declare void @llvm.coro.end(ptr, i1, token)59 60declare void @print(ptr)61declare noalias ptr @malloc(i32)62declare void @free(ptr)63