--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/llvm/test/Transforms/CodeGenPrepare/X86/pr27536.ll	Thu Feb 13 15:10:13 2020 +0900
@@ -0,0 +1,32 @@
+; RUN: opt -S -codegenprepare < %s | FileCheck %s
+target datalayout = "e-m:w-i64:64-f80:128-n8:16:32:64-S128"
+target triple = "x86_64-pc-windows-msvc"
+
+@rtti = external global i8
+
+define void @test1() personality i32 (...)* @__CxxFrameHandler3 {
+entry:
+  %e = alloca i8
+  %tmpcast = bitcast i8* %e to i16*
+  invoke void @_CxxThrowException(i8* null, i8* null)
+          to label %catchret.dest unwind label %catch.dispatch
+
+catch.dispatch:                                   ; preds = %entry
+  %0 = catchswitch within none [label %catch] unwind to caller
+
+catch:                                            ; preds = %catch.dispatch
+  %1 = catchpad within %0 [i8* @rtti, i32 0, i16* %tmpcast]
+  catchret from %1 to label %catchret.dest
+
+catchret.dest:                                    ; preds = %catch
+  ret void
+}
+; CHECK-LABEL: define void @test1(
+; CHECK: %[[alloca:.*]] = alloca i8
+; CHECK-NEXT: %[[bc:.*]] = bitcast i8* %[[alloca]] to i16*
+
+; CHECK: catchpad within {{.*}} [i8* @rtti, i32 0, i16* %[[bc]]]
+
+declare void @_CxxThrowException(i8*, i8*)
+
+declare i32 @__CxxFrameHandler3(...)