test/Transforms/JumpThreading/2011-04-02-SimplifyDeadBlock.ll

; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
; RUN: opt -S -passes=jump-threading < %s | FileCheck %s
; PR9446
; Just check that it doesn't crash

define void @int327() nounwind {
; CHECK-LABEL: @int327(
; CHECK-NEXT:  entry:
; CHECK-NEXT:    unreachable
; CHECK:       for.cond:
; CHECK-NEXT:    [[TOBOOL3:%.*]] = icmp eq i8 undef, 0
; CHECK-NEXT:    br i1 [[TOBOOL3]], label [[FOR_COND23:%.*]], label [[FOR_COND4:%.*]]
; CHECK:       for.cond4:
; CHECK-NEXT:    br label [[FOR_COND:%.*]]
; CHECK:       for.cond23:
; CHECK-NEXT:    [[CONV321:%.*]] = phi i32 [ [[CONV32:%.*]], [[FOR_BODY28:%.*]] ], [ 0, [[FOR_COND]] ], [ [[CONV321]], [[FOR_COND23]] ]
; CHECK-NEXT:    [[L_266_0:%.*]] = phi i32 [ [[PHITMP:%.*]], [[FOR_BODY28]] ], [ 0, [[FOR_COND]] ], [ 0, [[FOR_COND23]] ]
; CHECK-NEXT:    [[CMP26:%.*]] = icmp eq i32 [[L_266_0]], 0
; CHECK-NEXT:    br i1 [[CMP26]], label [[FOR_BODY28]], label [[FOR_COND23]]
; CHECK:       for.body28:
; CHECK-NEXT:    [[AND:%.*]] = and i32 [[CONV321]], 1
; CHECK-NEXT:    [[CONV32]] = zext i8 undef to i32
; CHECK-NEXT:    [[ADD:%.*]] = add nsw i32 [[L_266_0]], 1
; CHECK-NEXT:    [[PHITMP]] = and i32 [[ADD]], 255
; CHECK-NEXT:    br label [[FOR_COND23]]
; CHECK:       if.end43:
; CHECK-NEXT:    ret void
;
entry:
  unreachable

for.cond:                                         ; preds = %for.cond4
  %tobool3 = icmp eq i8 undef, 0
  br i1 %tobool3, label %for.cond23, label %for.cond4

for.cond4:                                        ; preds = %for.cond
  br label %for.cond

for.cond23:                                       ; preds = %for.body28, %for.cond23, %for.cond
  %conv321 = phi i32 [ %conv32, %for.body28 ], [ 0, %for.cond ], [ %conv321, %for.cond23 ]
  %l_266.0 = phi i32 [ %phitmp, %for.body28 ], [ 0, %for.cond ], [ 0, %for.cond23 ]
  %cmp26 = icmp eq i32 %l_266.0, 0
  br i1 %cmp26, label %for.body28, label %for.cond23

for.body28:                                       ; preds = %for.cond23
  %and = and i32 %conv321, 1
  %conv32 = zext i8 undef to i32
  %add = add nsw i32 %l_266.0, 1
  %phitmp = and i32 %add, 255
  br label %for.cond23

if.end43:                                         ; No predecessors!
  ret void
}