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

   1 ; RUN: llc -verify-machineinstrs < %s | FileCheck %s
   2
   3 ; BranchFolding used to remove our empty landingpad block, which is
   4 ; undesirable.
   5
   6 target datalayout = "e-m:w-i64:64-f80:128-n8:16:32:64-S128"
   7 target triple = "x86_64-pc-windows-msvc18.0.0"
   8
   9 declare i32 @__C_specific_handler(...)
  10
  11 declare void @bar()
  12
  13 define void @foo(i1 %cond) personality i32 (...)* @__C_specific_handler {
  14 entry:
  15   br i1 %cond, label %return, label %try
  16
  17 try:                                              ; preds = %entry
  18   invoke void @bar()
  19           to label %fallthrough unwind label %dispatch
  20
  21 dispatch:                                         ; preds = %try
  22   %cs1 = catchswitch within none [label %catch] unwind to caller
  23
  24 catch:                                            ; preds = %dispatch
  25   %0 = catchpad within %cs1 [i8* null]
  26   catchret from %0 to label %return
  27
  28 fallthrough:                                      ; preds = %try
  29   unreachable
  30
  31 return:                                           ; preds = %catch, %entry
  32   ret void
  33 }
  34
  35 ; CHECK-LABEL: foo: # @foo
  36 ; CHECK: testb $1, %cl
  37 ; CHECK: je .LBB0_[[try:[0-9]+]]
  38 ; CHECK: .LBB0_[[return:[0-9]+]]:
  39 ; CHECK: retq
  40 ; CHECK: .LBB0_[[try]]:
  41 ; CHECK: .Ltmp0:
  42 ; CHECK: callq bar
  43 ; CHECK: .Ltmp1:
  44 ; CHECK: .LBB0_[[catch:[0-9]+]]:
  45
  46 ; CHECK: .seh_handlerdata
  47 ; CHECK-NEXT: .Lfoo$parent_frame_offset = 32
  48 ; CHECK-NEXT: .long   (.Llsda_end0-.Llsda_begin0)/16
  49 ; CHECK-NEXT: .Llsda_begin0:
  50 ; CHECK-NEXT: .long   .Ltmp0@IMGREL+1
  51 ; CHECK-NEXT: .long   .Ltmp1@IMGREL+1
  52 ; CHECK-NEXT: .long   1
  53 ; CHECK-NEXT: .long   .LBB0_[[catch]]@IMGREL