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; Tests that a coroutine is split, inlined into the caller and devirtualized.
; RUN: opt < %s -S -passes='default<O2>' | FileCheck %s
define ptr @f() presplitcoroutine {
entry:
%id = call token @llvm.coro.id(i32 0, ptr null, ptr null, ptr null)
%need.dyn.alloc = call i1 @llvm.coro.alloc(token %id)
br i1 %need.dyn.alloc, label %dyn.alloc, label %coro.begin
dyn.alloc:
%size = call i32 @llvm.coro.size.i32()
%alloc = call ptr @malloc(i32 %size)
br label %coro.begin
coro.begin:
%phi = phi ptr [ null, %entry ], [ %alloc, %dyn.alloc ]
%hdl = call ptr @llvm.coro.begin(token %id, ptr %phi)
call void @print(i32 0)
%0 = call i8 @llvm.coro.suspend(token none, i1 false)
switch i8 %0, label %suspend [i8 0, label %resume
i8 1, label %cleanup]
resume:
call void @print(i32 1)
br 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 0, token none)
ret ptr %hdl
}
define i32 @main() {
entry:
%hdl = call ptr @f()
call void @llvm.coro.resume(ptr %hdl)
ret i32 0
; CHECK-LABEL: @main(
; CHECK: call void @print(i32 0)
; CHECK: call void @print(i32 1)
; CHECK: ret i32 0
}
declare ptr @llvm.coro.free(token, ptr)
declare i32 @llvm.coro.size.i32()
declare i8 @llvm.coro.suspend(token, i1)
declare void @llvm.coro.resume(ptr)
declare void @llvm.coro.destroy(ptr)
declare token @llvm.coro.id(i32, ptr, ptr, ptr)
declare i1 @llvm.coro.alloc(token)
declare ptr @llvm.coro.begin(token, ptr)
declare i1 @llvm.coro.end(ptr, i1, token)
declare noalias ptr @malloc(i32)
declare void @print(i32)
declare void @free(ptr)
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