Index: lib/Transforms/Coroutines/CoroSplit.cpp
===================================================================
--- lib/Transforms/Coroutines/CoroSplit.cpp
+++ lib/Transforms/Coroutines/CoroSplit.cpp
@@ -250,8 +250,7 @@
   auto *FnTy = cast<FunctionType>(FnPtrTy->getElementType());
 
   Function *NewF =
-      Function::Create(FnTy, GlobalValue::LinkageTypes::InternalLinkage,
-                       F.getName() + Suffix, M);
+      Function::Create(FnTy, F.getLinkage(), F.getName() + Suffix, M);
   NewF->addParamAttr(0, Attribute::NonNull);
   NewF->addParamAttr(0, Attribute::NoAlias);
 
Index: test/Transforms/Coroutines/coro-debug.ll
===================================================================
--- test/Transforms/Coroutines/coro-debug.ll
+++ test/Transforms/Coroutines/coro-debug.ll
@@ -127,9 +127,9 @@
 !24 = !DILocation(line: 62, column: 3, scope: !6)
 
 ; CHECK: define i8* @f(i32 %x) #0 !dbg ![[ORIG:[0-9]+]]
-; CHECK: define internal fastcc void @f.resume(%f.Frame* %FramePtr) #0 !dbg ![[RESUME:[0-9]+]]
-; CHECK: define internal fastcc void @f.destroy(%f.Frame* %FramePtr) #0 !dbg ![[DESTROY:[0-9]+]]
-; CHECK: define internal fastcc void @f.cleanup(%f.Frame* %FramePtr) #0 !dbg ![[CLEANUP:[0-9]+]]
+; CHECK: define dso_local fastcc void @f.resume(%f.Frame* %FramePtr) #0 !dbg ![[RESUME:[0-9]+]]
+; CHECK: define dso_local fastcc void @f.destroy(%f.Frame* %FramePtr) #0 !dbg ![[DESTROY:[0-9]+]]
+; CHECK: define dso_local fastcc void @f.cleanup(%f.Frame* %FramePtr) #0 !dbg ![[CLEANUP:[0-9]+]]
 
 ; CHECK: ![[ORIG]] = distinct !DISubprogram(name: "f", linkageName: "flink"
 ; CHECK: !DILocalVariable(name: "x", arg: 1, scope: ![[ORIG]]
Index: test/Transforms/Coroutines/coro-eh-aware-edge-split.ll
===================================================================
--- test/Transforms/Coroutines/coro-eh-aware-edge-split.ll
+++ test/Transforms/Coroutines/coro-eh-aware-edge-split.ll
@@ -4,7 +4,7 @@
 target datalayout = "e-m:e-i64:64-f80:128-n8:16:32:64-S128"
 target triple = "x86_64-unknown-linux-gnu"
 
-; CHECK-LABEL: define internal fastcc void @f.resume(
+; CHECK-LABEL: define dso_local fastcc void @f.resume(
 define void @f(i1 %cond) "coroutine.presplit"="1" personality i32 0 {
 entry:
   %id = call token @llvm.coro.id(i32 16, i8* null, i8* null, i8* null)
@@ -72,7 +72,7 @@
   unreachable
 }
 
-; CHECK-LABEL: define internal fastcc void @g.resume(
+; CHECK-LABEL: define dso_local fastcc void @g.resume(
 define void @g(i1 %cond, i32 %x, i32 %y) "coroutine.presplit"="1" personality i32 0 {
 entry:
   %id = call token @llvm.coro.id(i32 16, i8* null, i8* null, i8* null)
@@ -134,7 +134,7 @@
   unreachable
 }
 
-; CHECK-LABEL: define internal fastcc void @h.resume(
+; CHECK-LABEL: define dso_local fastcc void @h.resume(
 define void @h(i1 %cond, i32 %x, i32 %y) "coroutine.presplit"="1" personality i32 0 {
 entry:
   %id = call token @llvm.coro.id(i32 16, i8* null, i8* null, i8* null)
Index: test/Transforms/Coroutines/coro-split-eh.ll
===================================================================
--- test/Transforms/Coroutines/coro-split-eh.ll
+++ test/Transforms/Coroutines/coro-split-eh.ll
@@ -102,7 +102,7 @@
 ; VERIFY Resume Parts
 
 ; Verify that resume function does not contains both print calls appearing after coro.end
-; CHECK-LABEL: define internal fastcc void @f.resume
+; CHECK-LABEL: define dso_local fastcc void @f.resume
 ; CHECK: invoke void @print(i32 1)
 ; CHECK:   to label %CoroEnd unwind label %lpad
 
@@ -116,7 +116,7 @@
 ; CHECK-NEXT:      resume { i8*, i32 } %lpval
 
 ; Verify that resume function does not contains both print calls appearing after coro.end
-; CHECK-LABEL: define internal fastcc void @f2.resume
+; CHECK-LABEL: define dso_local fastcc void @f2.resume
 ; CHECK: invoke void @print(i32 1)
 ; CHECK:   to label %CoroEnd unwind label %lpad
 
Index: test/Transforms/Coroutines/coro-split-hidden.ll
===================================================================
--- /dev/null
+++ test/Transforms/Coroutines/coro-split-hidden.ll
@@ -0,0 +1,81 @@
+; 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 -coro-split -S | FileCheck %s
+
+define hidden i8* @f() "coroutine.presplit"="1" {
+entry:
+  %id = call token @llvm.coro.id(i32 0, i8* null, i8* null, i8* 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 i8* @malloc(i32 %size)
+  br label %begin
+
+begin:
+  %phi = phi i8* [ null, %entry ], [ %alloc, %dyn.alloc ]
+  %hdl = call i8* @llvm.coro.begin(token %id, i8* %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 i8* @llvm.coro.free(token %id, i8* %hdl)
+  call void @free(i8* %mem)
+  br label %suspend
+suspend:
+  call i1 @llvm.coro.end(i8* %hdl, i1 0)  
+  ret i8* %hdl
+}
+
+; CHECK-LABEL: hidden{{.*}}@f(
+; CHECK: call i8* @malloc
+; CHECK: @llvm.coro.begin(token %id, i8* %phi)
+; CHECK: store void (%f.Frame*)* @f.resume, void (%f.Frame*)** %resume.addr
+; CHECK: %[[SEL:.+]] = select i1 %need.alloc, void (%f.Frame*)* @f.destroy, void (%f.Frame*)* @f.cleanup
+; CHECK: store void (%f.Frame*)* %[[SEL]], void (%f.Frame*)** %destroy.addr
+; CHECK: call void @print(i32 0)
+; CHECK-NOT: call void @print(i32 1)
+; CHECK-NOT: call void @free(
+; CHECK: ret i8* %hdl
+
+; CHECK-LABEL: hidden{{.*}}@f.resume(
+; CHECK-NOT: call i8* @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: hidden{{.*}}@f.destroy(
+; CHECK-NOT: call i8* @malloc
+; CHECK-NOT: call void @print(
+; CHECK: call void @free(
+; CHECK: ret void
+
+; CHECK-LABEL: hidden{{.*}}@f.cleanup(
+; CHECK-NOT: call i8* @malloc
+; CHECK-NOT: call void @print(
+; CHECK-NOT: call void @free(
+; CHECK: ret void
+
+declare i8* @llvm.coro.free(token, i8*)
+declare i32 @llvm.coro.size.i32()
+declare i8  @llvm.coro.suspend(token, i1)
+declare void @llvm.coro.resume(i8*)
+declare void @llvm.coro.destroy(i8*)
+
+declare token @llvm.coro.id(i32, i8*, i8*, i8*)
+declare i1 @llvm.coro.alloc(token)
+declare i8* @llvm.coro.begin(token, i8*)
+declare i1 @llvm.coro.end(i8*, i1) 
+
+declare noalias i8* @malloc(i32)
+declare void @print(i32)
+declare void @free(i8*)