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; First example from Doc/Coroutines.rst (one block loop)
; RUN: opt < %s -aa-pipeline=basic-aa -passes='default<O2>' -preserve-alignment-assumptions-during-inlining=false -S | FileCheck %s
define ptr @f(i32 %n) presplitcoroutine {
entry:
%id = call token @llvm.coro.id(i32 0, ptr null, ptr null, ptr null)
%size = call i32 @llvm.coro.size.i32()
%alloc = call ptr @malloc(i32 %size)
%hdl = call noalias ptr @llvm.coro.begin(token %id, ptr %alloc)
br label %loop
loop:
%n.val = phi i32 [ %n, %entry ], [ %inc, %loop ]
%inc = add nsw i32 %n.val, 1
call void @print(i32 %n.val)
%0 = call i8 @llvm.coro.suspend(token none, i1 false)
switch i8 %0, label %suspend [i8 0, label %loop
i8 1, label %cleanup]
cleanup:
%mem = call ptr @llvm.coro.free(token %id, ptr %hdl)
call void @free(ptr %mem)
br label %suspend
suspend:
call i1 @llvm.coro.end(ptr %hdl, i1 false, token none)
ret ptr %hdl
}
; CHECK-LABEL: @main(
define i32 @main() {
entry:
%hdl = call ptr @f(i32 4)
call void @llvm.coro.resume(ptr %hdl)
call void @llvm.coro.resume(ptr %hdl)
call void @llvm.coro.destroy(ptr %hdl)
ret i32 0
; CHECK-NEXT: entry:
; CHECK: call void @print(i32 4)
; CHECK: call void @print(i32 5)
; CHECK: call void @print(i32 6)
; CHECK: ret i32 0
}
declare ptr @malloc(i32)
declare void @free(ptr)
declare void @print(i32)
declare token @llvm.coro.id(i32, ptr, ptr, ptr)
declare i32 @llvm.coro.size.i32()
declare ptr @llvm.coro.begin(token, ptr)
declare i8 @llvm.coro.suspend(token, i1)
declare ptr @llvm.coro.free(token, ptr)
declare i1 @llvm.coro.end(ptr, i1, token)
declare void @llvm.coro.resume(ptr)
declare void @llvm.coro.destroy(ptr)
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