llvm/test/Transforms/Coroutines/coro-split-hidden.ll

; Tests that coro-split can convert functions with hidden visibility.
; These may be generated by a frontend such as Clang, when inlining with
; '-fvisibility-inlines-hidden'.
; RUN: opt < %s -passes='cgscc(coro-split),simplifycfg,early-cse' -S | FileCheck %s

define hidden ptr @f() presplitcoroutine {
entry:
  %id = call token @llvm.coro.id(i32 0, ptr null, ptr null, ptr null)
  %need.alloc = call i1 @llvm.coro.alloc(token %id)
  br i1 %need.alloc, label %dyn.alloc, label %begin

dyn.alloc:
  %size = call i32 @llvm.coro.size.i32()
  %alloc = call ptr @malloc(i32 %size)
  br label %begin

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
}

; CHECK-LABEL: hidden{{.*}}@f(
; CHECK: call ptr @malloc
; CHECK: @llvm.coro.begin(token %id, ptr %phi)
; CHECK: store ptr @f.resume, ptr %hdl
; CHECK: %[[SEL:.+]] = select i1 %need.alloc, ptr @f.destroy, ptr @f.cleanup
; CHECK: store ptr %[[SEL]], ptr %destroy.addr
; CHECK: call void @print(i32 0)
; CHECK-NOT: call void @print(i32 1)
; CHECK-NOT: call void @free(
; CHECK: ret ptr %hdl

; CHECK-LABEL: internal{{.*}}@f.resume(
; CHECK-NOT: call ptr @malloc
; CHECK-NOT: call void @print(i32 0)
; CHECK: call void @print(i32 1)
; CHECK-NOT: call void @print(i32 0)
; CHECK: call void @free(
; CHECK: ret void

; CHECK-LABEL: internal{{.*}}@f.destroy(
; CHECK-NOT: call ptr @malloc
; CHECK-NOT: call void @print(
; CHECK: call void @free(
; CHECK: ret void

; CHECK-LABEL: internal{{.*}}@f.cleanup(
; CHECK-NOT: call ptr @malloc
; CHECK-NOT: call void @print(
; CHECK-NOT: call void @free(
; CHECK: ret void

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) allockind("alloc,uninitialized")
declare void @print(i32)
declare void @free(ptr) willreturn allockind("free")