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1; First example from Doc/Coroutines.rst (two block loop)2; RUN: opt < %s -aa-pipeline=basic-aa -passes='default<O2>' -preserve-alignment-assumptions-during-inlining=false -S | FileCheck %s3 4define ptr @f(i32 %n) presplitcoroutine {5entry:6 %id = call token @llvm.coro.id(i32 0, ptr null, ptr null, ptr null)7 %size = call i32 @llvm.coro.size.i32()8 %alloc = call ptr @malloc(i32 %size)9 %hdl = call ptr @llvm.coro.begin(token %id, ptr %alloc)10 br label %loop11 12loop:13 %n.val = phi i32 [ %n, %entry ], [ %inc, %resume ]14 call void @print(i32 %n.val)15 %0 = call i8 @llvm.coro.suspend(token none, i1 false)16 switch i8 %0, label %suspend [i8 0, label %resume 17 i8 1, label %cleanup]18resume:19 %inc = add i32 %n.val, 120 br label %loop21 22cleanup:23 %mem = call ptr @llvm.coro.free(token %id, ptr %hdl)24 call void @free(ptr %mem)25 br label %suspend26suspend:27 call void @llvm.coro.end(ptr %hdl, i1 0, token none) 28 ret ptr %hdl29}30 31; CHECK-LABEL: @main(32define i32 @main() {33entry:34 %hdl = call ptr @f(i32 4)35 call void @llvm.coro.resume(ptr %hdl)36 call void @llvm.coro.resume(ptr %hdl)37 call void @llvm.coro.destroy(ptr %hdl)38 ret i32 039; CHECK: entry:40; CHECK: call void @print(i32 4)41; CHECK: call void @print(i32 5)42; CHECK: call void @print(i32 6)43; CHECK: ret i32 044}45 46declare token @llvm.coro.id(i32, ptr, ptr, ptr)47declare ptr @llvm.coro.alloc(token)48declare ptr @llvm.coro.free(token, ptr)49declare i32 @llvm.coro.size.i32()50declare i8 @llvm.coro.suspend(token, i1)51declare void @llvm.coro.resume(ptr)52declare void @llvm.coro.destroy(ptr)53 54declare ptr @llvm.coro.begin(token, ptr)55declare void @llvm.coro.end(ptr, i1, token) 56 57declare noalias ptr @malloc(i32)58declare void @print(i32)59declare void @free(ptr)60