[WinEH] Visit 'unwind to caller' catchswitches nested in catchswitches

We had the right logic for the nested cleanuppad case but omitted it for
catchswitches.

llvm-svn: 261615

1 files changed, 55 insertions, 0 deletions

diff --git a/llvm/test/CodeGen/WinEH/wineh-nested-unwind.ll b/llvm/test/CodeGen/WinEH/wineh-nested-unwind.ll
new file mode 100644
index 00000000000..b568be52160
--- /dev/null
+++ b/llvm/test/CodeGen/WinEH/wineh-nested-unwind.ll
@@ -0,0 +1,55 @@
+; RUN: llc < %s | FileCheck %s
+target datalayout = "e-m:w-i64:64-f80:128-n8:16:32:64-S128"
+target triple = "x86_64-pc-windows-msvc18.0.0"
+
+; Function Attrs: uwtable
+define void @f() #0 personality i8* bitcast (i32 (...)* @__CxxFrameHandler3 to i8*) {
+entry:
+  invoke void @g()
+          to label %try.cont unwind label %catch.dispatch
+
+catch.dispatch:                                   ; preds = %entry
+  %0 = catchswitch within none [label %catch] unwind label %ehcleanup
+
+catch:                                            ; preds = %catch.dispatch
+  %1 = catchpad within %0 [i8* null, i32 64, i8* null]
+  invoke void @g() [ "funclet"(token %1) ]
+          to label %dtor.exit unwind label %catch.dispatch.i
+
+catch.dispatch.i:                                 ; preds = %catch
+  %2 = catchswitch within %1 [label %catch.i] unwind to caller
+
+catch.i:                                          ; preds = %catch.dispatch.i
+  %3 = catchpad within %2 [i8* null, i32 64, i8* null]
+  catchret from %3 to label %dtor.exit
+
+dtor.exit:
+  catchret from %1 to label %try.cont
+
+try.cont:
+  ret void
+
+ehcleanup:                                        ; preds = %catch.dispatch
+  %4 = cleanuppad within none []
+  call void @dtor() #1 [ "funclet"(token %4) ]
+  cleanupret from %4 unwind to caller
+}
+
+declare void @g()
+
+declare i32 @__CxxFrameHandler3(...)
+
+; Function Attrs: nounwind
+declare void @dtor() #1
+
+attributes #0 = { uwtable }
+attributes #1 = { nounwind }
+
+; CHECK-LABEL: $ip2state$f:
+; CHECK: -1
+; CHECK: 1
+; CHECK: -1
+; CHECK: 4
+; CHECK: 2
+; CHECK: 3
+; CHECK: 2