1 files changed, 44 insertions, 0 deletions
diff --git a/test/Transforms/Inline/frameescape.ll b/test/Transforms/Inline/frameescape.ll
new file mode 100644
index 0000000..fb33602
--- /dev/null
+++ b/test/Transforms/Inline/frameescape.ll
@@ -0,0 +1,44 @@
+; RUN: opt -inline -S < %s | FileCheck %s
+
+; PR23216: We can't inline functions using llvm.frameescape.
+
+declare void @llvm.frameescape(...)
+declare i8* @llvm.frameaddress(i32)
+declare i8* @llvm.framerecover(i8*, i8*, i32)
+
+define internal void @foo(i8* %fp) {
+  %a.i8 = call i8* @llvm.framerecover(i8* bitcast (i32 ()* @bar to i8*), i8* %fp, i32 0)
+  %a = bitcast i8* %a.i8 to i32*
+  store i32 42, i32* %a
+  ret void
+}
+
+define internal i32 @bar() {
+entry:
+  %a = alloca i32
+  call void (...) @llvm.frameescape(i32* %a)
+  %fp = call i8* @llvm.frameaddress(i32 0)
+  tail call void @foo(i8* %fp)
+  %r = load i32, i32* %a
+  ret i32 %r
+}
+
+; We even bail when someone marks it alwaysinline.
+define internal i32 @bar_alwaysinline() alwaysinline {
+entry:
+  %a = alloca i32
+  call void (...) @llvm.frameescape(i32* %a)
+  tail call void @foo(i8* null)
+  ret i32 0
+}
+
+define i32 @bazz() {
+entry:
+  %r = tail call i32 @bar()
+  %r1 = tail call i32 @bar_alwaysinline()
+  ret i32 %r
+}
+
+; CHECK: define i32 @bazz()
+; CHECK: call i32 @bar()
+; CHECK: call i32 @bar_alwaysinline()