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1; Third example from Doc/Coroutines.rst (two suspend points)2; RUN: opt < %s -aa-pipeline=basic-aa -passes='default<O2>' -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 %need.dyn.alloc = call i1 @llvm.coro.alloc(token %id)9 br i1 %need.dyn.alloc, label %dyn.alloc, label %coro.begin10dyn.alloc:11 %alloc = call ptr @malloc(i32 %size)12 br label %coro.begin13coro.begin:14 %phi = phi ptr [ null, %entry ], [ %alloc, %dyn.alloc ]15 %hdl = call noalias ptr @llvm.coro.begin(token %id, ptr %phi)16 br label %loop17loop:18 %n.val = phi i32 [ %n, %coro.begin ], [ %inc, %loop.resume ]19 call void @print(i32 %n.val) #420 %0 = call i8 @llvm.coro.suspend(token none, i1 false)21 switch i8 %0, label %suspend [i8 0, label %loop.resume22 i8 1, label %cleanup]23loop.resume:24 %inc = add nsw i32 %n.val, 125 %sub = xor i32 %n.val, -126 call void @print(i32 %sub)27 %1 = call i8 @llvm.coro.suspend(token none, i1 false)28 switch i8 %1, label %suspend [i8 0, label %loop29 i8 1, label %cleanup]30cleanup:31 %mem = call ptr @llvm.coro.free(token %id, ptr %hdl)32 call void @free(ptr %mem)33 br label %suspend34suspend:35 call void @llvm.coro.end(ptr %hdl, i1 false, token none)36 ret ptr %hdl37}38 39; CHECK-LABEL: @main40define i32 @main() {41entry:42 %hdl = call ptr @f(i32 4)43 call void @llvm.coro.resume(ptr %hdl)44 call void @llvm.coro.resume(ptr %hdl)45 %c = ptrtoint ptr %hdl to i6446 %to = icmp eq i64 %c, 047 br i1 %to, label %return, label %destroy48destroy:49 call void @llvm.coro.destroy(ptr %hdl)50 br label %return51return:52 ret i32 053; CHECK-NOT: ptr @malloc54; CHECK: call void @print(i32 4)55; CHECK-NEXT: call void @print(i32 -5)56; CHECK-NEXT: call void @print(i32 5)57; CHECK: ret i32 058}59 60declare ptr @malloc(i32)61declare void @free(ptr)62declare void @print(i32)63 64declare token @llvm.coro.id(i32, ptr, ptr, ptr)65declare i1 @llvm.coro.alloc(token)66declare i32 @llvm.coro.size.i32()67declare ptr @llvm.coro.begin(token, ptr)68declare i8 @llvm.coro.suspend(token, i1)69declare ptr @llvm.coro.free(token, ptr)70declare void @llvm.coro.end(ptr, i1, token)71 72declare void @llvm.coro.resume(ptr)73declare void @llvm.coro.destroy(ptr)74