test/CodeGen/Thumb2/2012-01-13-CBNZBug.ll

; RUN: llc < %s -mtriple=thumbv7-apple-ios -relocation-model=pic -disable-fp-elim -mcpu=cortex-a8 | FileCheck %s
; rdar://10676853

%struct.Dict_node_struct = type { i8*, %struct.Word_file_struct*, %struct.Exp_struct*, %struct.Dict_node_struct*, %struct.Dict_node_struct* }
%struct.Word_file_struct = type { [60 x i8], i32, %struct.Word_file_struct* }
%struct.Exp_struct = type { i8, i8, i8, i8, %union.anon }
%union.anon = type { %struct.E_list_struct* }
%struct.E_list_struct = type { %struct.E_list_struct*, %struct.Exp_struct* }

@lookup_list = external hidden unnamed_addr global %struct.Dict_node_struct*, align 4

declare void @llvm.memcpy.p0i8.p0i8.i32(i8* nocapture, i8* nocapture, i32, i1) nounwind

define hidden fastcc void @rdictionary_lookup(%struct.Dict_node_struct* %dn, i8* nocapture %s) nounwind ssp {
; CHECK-LABEL: rdictionary_lookup:
entry:
  br label %tailrecurse

tailrecurse:                                      ; preds = %if.then10, %entry
  %dn.tr = phi %struct.Dict_node_struct* [ %dn, %entry ], [ %9, %if.then10 ]
  %cmp = icmp eq %struct.Dict_node_struct* %dn.tr, null
  br i1 %cmp, label %if.end11, label %if.end

if.end:                                           ; preds = %tailrecurse
  %string = getelementptr inbounds %struct.Dict_node_struct, %struct.Dict_node_struct* %dn.tr, i32 0, i32 0
  %0 = load i8*, i8** %string, align 4
  br label %while.cond.i

while.cond.i:                                     ; preds = %while.body.i, %if.end
  %1 = phi i8* [ %s, %if.end ], [ %incdec.ptr.i, %while.body.i ]
  %storemerge.i = phi i8* [ %0, %if.end ], [ %incdec.ptr6.i, %while.body.i ]
  %2 = load i8, i8* %1, align 1
  %cmp.i = icmp eq i8 %2, 0
  %.pre.i = load i8, i8* %storemerge.i, align 1
  br i1 %cmp.i, label %lor.lhs.false.i, label %land.end.i

land.end.i:                                       ; preds = %while.cond.i
  %cmp4.i = icmp eq i8 %2, %.pre.i
  br i1 %cmp4.i, label %while.body.i, label %while.end.i

while.body.i:                                     ; preds = %land.end.i
  %incdec.ptr.i = getelementptr inbounds i8, i8* %1, i32 1
  %incdec.ptr6.i = getelementptr inbounds i8, i8* %storemerge.i, i32 1
  br label %while.cond.i

while.end.i:                                      ; preds = %land.end.i
  %cmp8.i = icmp eq i8 %2, 42
  br i1 %cmp8.i, label %if.end3, label %lor.lhs.false.i

lor.lhs.false.i:                                  ; preds = %while.end.i, %while.cond.i
  %3 = phi i8 [ %2, %while.end.i ], [ 0, %while.cond.i ]
  %cmp11.i = icmp eq i8 %.pre.i, 42
  br i1 %cmp11.i, label %if.end3, label %dict_match.exit

dict_match.exit:                                  ; preds = %lor.lhs.false.i
  %cmp14.i = icmp eq i8 %3, 46
  %conv16.i = sext i8 %3 to i32
  %.conv16.i = select i1 %cmp14.i, i32 0, i32 %conv16.i
  %cmp18.i = icmp eq i8 %.pre.i, 46
  %conv22.i = sext i8 %.pre.i to i32
  %cond24.i = select i1 %cmp18.i, i32 0, i32 %conv22.i
  %sub.i = sub nsw i32 %.conv16.i, %cond24.i
  %cmp1 = icmp sgt i32 %sub.i, -1
  br i1 %cmp1, label %if.end3, label %if.then10

if.end3:                                          ; preds = %dict_match.exit, %lor.lhs.false.i, %while.end.i
; CHECK: %if.end3
; CHECK: cmp
; CHECK-NOT: cbnz
  %storemerge1.i3 = phi i32 [ %sub.i, %dict_match.exit ], [ 0, %lor.lhs.false.i ], [ 0, %while.end.i ]
  %right = getelementptr inbounds %struct.Dict_node_struct, %struct.Dict_node_struct* %dn.tr, i32 0, i32 4
  %4 = load %struct.Dict_node_struct*, %struct.Dict_node_struct** %right, align 4
  tail call fastcc void @rdictionary_lookup(%struct.Dict_node_struct* %4, i8* %s)
  %cmp4 = icmp eq i32 %storemerge1.i3, 0
  br i1 %cmp4, label %if.then5, label %if.end8

if.then5:                                         ; preds = %if.end3
  %call6 = tail call fastcc i8* @xalloc(i32 20)
  %5 = bitcast i8* %call6 to %struct.Dict_node_struct*
  %6 = bitcast %struct.Dict_node_struct* %dn.tr to i8*
  tail call void @llvm.memcpy.p0i8.p0i8.i32(i8* align 4 %call6, i8* align 4 %6, i32 16, i1 false)
  %7 = load %struct.Dict_node_struct*, %struct.Dict_node_struct** @lookup_list, align 4
  %right7 = getelementptr inbounds i8, i8* %call6, i32 16
  %8 = bitcast i8* %right7 to %struct.Dict_node_struct**
  store %struct.Dict_node_struct* %7, %struct.Dict_node_struct** %8, align 4
  store %struct.Dict_node_struct* %5, %struct.Dict_node_struct** @lookup_list, align 4
  br label %if.then10

if.end8:                                          ; preds = %if.end3
  %cmp9 = icmp slt i32 %storemerge1.i3, 1
  br i1 %cmp9, label %if.then10, label %if.end11

if.then10:                                        ; preds = %if.end8, %if.then5, %dict_match.exit
  %left = getelementptr inbounds %struct.Dict_node_struct, %struct.Dict_node_struct* %dn.tr, i32 0, i32 3
  %9 = load %struct.Dict_node_struct*, %struct.Dict_node_struct** %left, align 4
  br label %tailrecurse

if.end11:                                         ; preds = %if.end8, %tailrecurse
  ret void
}

; Materializable
declare hidden fastcc i8* @xalloc(i32) nounwind ssp