Imported Upstream version 5.18.0.246

Former-commit-id: 0c7ce5b1a7851e13f22acfd379b7f9fb304e4833

external/llvm/test/CodeGen/X86/catchret-empty-fallthrough.ll

@@ -0,0 +1,53 @@
+; RUN: llc -verify-machineinstrs < %s | FileCheck %s
+
+; BranchFolding used to remove our empty landingpad block, which is
+; undesirable.
+
+target datalayout = "e-m:w-i64:64-f80:128-n8:16:32:64-S128"
+target triple = "x86_64-pc-windows-msvc18.0.0"
+
+declare i32 @__C_specific_handler(...)
+
+declare void @bar()
+
+define void @foo(i1 %cond) personality i32 (...)* @__C_specific_handler {
+entry:
+  br i1 %cond, label %return, label %try
+
+try:                                              ; preds = %entry
+  invoke void @bar()
+          to label %fallthrough unwind label %dispatch
+
+dispatch:                                         ; preds = %try
+  %cs1 = catchswitch within none [label %catch] unwind to caller
+
+catch:                                            ; preds = %dispatch
+  %0 = catchpad within %cs1 [i8* null]
+  catchret from %0 to label %return
+
+fallthrough:                                      ; preds = %try
+  unreachable
+
+return:                                           ; preds = %catch, %entry
+  ret void
+}
+
+; CHECK-LABEL: foo: # @foo
+; CHECK: testb $1, %cl
+; CHECK: je .LBB0_[[try:[0-9]+]]
+; CHECK: .LBB0_[[return:[0-9]+]]:
+; CHECK: retq
+; CHECK: .LBB0_[[try]]:
+; CHECK: .Ltmp0:
+; CHECK: callq bar
+; CHECK: .Ltmp1:
+; CHECK: .LBB0_[[catch:[0-9]+]]:
+
+; CHECK: .seh_handlerdata
+; CHECK-NEXT: .Lfoo$parent_frame_offset = 32
+; CHECK-NEXT: .long   (.Llsda_end0-.Llsda_begin0)/16
+; CHECK-NEXT: .Llsda_begin0:
+; CHECK-NEXT: .long   .Ltmp0@IMGREL+1
+; CHECK-NEXT: .long   .Ltmp1@IMGREL+1
+; CHECK-NEXT: .long   1
+; CHECK-NEXT: .long   .LBB0_[[catch]]@IMGREL