1; Fifth example from Doc/Coroutines.rst (final suspend) 2; RUN: opt < %s -O2 -enable-coroutines -preserve-alignment-assumptions-during-inlining=false -S | FileCheck %s 3; RUN: opt < %s -aa-pipeline=basic-aa -passes='default<O2>' -enable-coroutines -preserve-alignment-assumptions-during-inlining=false -S | FileCheck %s 4 5define i8* @f(i32 %n) { 6entry: 7 %id = call token @llvm.coro.id(i32 0, i8* null, i8* null, i8* null) 8 %size = call i32 @llvm.coro.size.i32() 9 %alloc = call i8* @malloc(i32 %size) 10 %hdl = call noalias i8* @llvm.coro.begin(token %id, i8* %alloc) 11 br label %while.cond 12while.cond: 13 %n.val = phi i32 [ %n, %entry ], [ %dec, %while.body ] 14 %cmp = icmp sgt i32 %n.val, 0 15 br i1 %cmp, label %while.body, label %while.end 16 17while.body: 18 %dec = add nsw i32 %n.val, -1 19 call void @print(i32 %n.val) #4 20 %s = call i8 @llvm.coro.suspend(token none, i1 false) 21 switch i8 %s, label %suspend [i8 0, label %while.cond 22 i8 1, label %cleanup] 23while.end: 24 %s.final = call i8 @llvm.coro.suspend(token none, i1 true) 25 switch i8 %s.final, label %suspend [i8 0, label %trap 26 i8 1, label %cleanup] 27trap: 28 call void @llvm.trap() 29 unreachable 30cleanup: 31 %mem = call i8* @llvm.coro.free(token %id, i8* %hdl) 32 call void @free(i8* %mem) 33 br label %suspend 34suspend: 35 call i1 @llvm.coro.end(i8* %hdl, i1 false) 36 ret i8* %hdl 37} 38 39declare noalias i8* @malloc(i32) 40declare void @print(i32) 41declare void @llvm.trap() 42declare void @free(i8* nocapture) 43 44declare token @llvm.coro.id( i32, i8*, i8*, i8*) 45declare i32 @llvm.coro.size.i32() 46declare i8* @llvm.coro.begin(token, i8*) 47declare token @llvm.coro.save(i8*) 48declare i8 @llvm.coro.suspend(token, i1) 49declare i8* @llvm.coro.free(token, i8*) 50declare i1 @llvm.coro.end(i8*, i1) 51 52; CHECK-LABEL: @main 53define i32 @main() { 54entry: 55 %hdl = call i8* @f(i32 4) 56 br label %while 57while: 58 call void @llvm.coro.resume(i8* %hdl) 59 %done = call i1 @llvm.coro.done(i8* %hdl) 60 br i1 %done, label %end, label %while 61end: 62 call void @llvm.coro.destroy(i8* %hdl) 63 ret i32 0 64 65; CHECK: call void @print(i32 4) 66; CHECK: call void @print(i32 3) 67; CHECK: call void @print(i32 2) 68; CHECK: call void @print(i32 1) 69; CHECK: ret i32 0 70} 71 72declare i1 @llvm.coro.done(i8*) 73declare void @llvm.coro.resume(i8*) 74declare void @llvm.coro.destroy(i8*) 75