test/Transforms/LoopIdiom/bcmp-negative-tests.ll

; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
; RUN: opt -loop-idiom -verify -verify-each -verify-dom-info -verify-loop-info < %s -S | FileCheck %s --implicit-check-not=bcmp --implicit-check-not=memcmp

; CHECK: source_filename

target datalayout = "e-p:64:64:64-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:64:64-f32:32:32-f64:64:64-v64:64:64-v128:128:128-a0:0:64-s0:64:64-f80:128:128-n8:16:32:64"

define i1 @three_blocks_and_two_latches_in_loop(i8* %ptr0, i8* %ptr1) {
; CHECK-LABEL: @three_blocks_and_two_latches_in_loop(
; CHECK-NEXT:  entry:
; CHECK-NEXT:    br label [[FOR_BODY:%.*]]
; CHECK:       for.body:
; CHECK-NEXT:    [[I_08:%.*]] = phi i64 [ 0, [[ENTRY:%.*]] ], [ [[I_08_BE:%.*]], [[FOR_BODY_BACKEDGE:%.*]] ]
; CHECK-NEXT:    [[ARRAYIDX:%.*]] = getelementptr inbounds i8, i8* [[PTR0:%.*]], i64 [[I_08]]
; CHECK-NEXT:    [[V0:%.*]] = load i8, i8* [[ARRAYIDX]]
; CHECK-NEXT:    [[ARRAYIDX1:%.*]] = getelementptr inbounds i8, i8* [[PTR1:%.*]], i64 [[I_08]]
; CHECK-NEXT:    [[V1:%.*]] = load i8, i8* [[ARRAYIDX1]]
; CHECK-NEXT:    [[CMP3:%.*]] = icmp eq i8 [[V0]], [[V1]]
; CHECK-NEXT:    [[INC:%.*]] = add nuw nsw i64 [[I_08]], 1
; CHECK-NEXT:    br i1 [[CMP3]], label [[FOR_PASSTHROUGH:%.*]], label [[CLEANUP:%.*]]
; CHECK:       for.passthrough:
; CHECK-NEXT:    br i1 true, label [[FOR_COND:%.*]], label [[FOR_BODY_BACKEDGE]]
; CHECK:       for.body.backedge:
; CHECK-NEXT:    [[I_08_BE]] = phi i64 [ [[INC]], [[FOR_COND]] ], [ 0, [[FOR_PASSTHROUGH]] ]
; CHECK-NEXT:    br label [[FOR_BODY]]
; CHECK:       for.cond:
; CHECK-NEXT:    [[CMP:%.*]] = icmp ult i64 [[INC]], 8
; CHECK-NEXT:    br i1 [[CMP]], label [[FOR_BODY_BACKEDGE]], label [[CLEANUP]]
; CHECK:       cleanup:
; CHECK-NEXT:    [[RES:%.*]] = phi i1 [ false, [[FOR_BODY]] ], [ true, [[FOR_COND]] ]
; CHECK-NEXT:    ret i1 [[RES]]
;
entry:
  br label %for.body

for.body:
  %i.08 = phi i64 [ 0, %entry ], [ %inc, %for.cond ], [ 0, %for.passthrough ]
  %arrayidx = getelementptr inbounds i8, i8* %ptr0, i64 %i.08
  %v0 = load i8, i8* %arrayidx
  %arrayidx1 = getelementptr inbounds i8, i8* %ptr1, i64 %i.08
  %v1 = load i8, i8* %arrayidx1
  %cmp3 = icmp eq i8 %v0, %v1
  %inc = add nuw nsw i64 %i.08, 1
  br i1 %cmp3, label %for.passthrough, label %cleanup

for.passthrough:
  br i1 true, label %for.cond, label %for.body

for.cond:
  %cmp = icmp ult i64 %inc, 8
  br i1 %cmp, label %for.body, label %cleanup

cleanup:
  %res = phi i1 [ false, %for.body ], [ true, %for.cond ]
  ret i1 %res
}

define i1 @three_blocks_in_loop(i8* %ptr0, i8* %ptr1) {
; CHECK-LABEL: @three_blocks_in_loop(
; CHECK-NEXT:  entry:
; CHECK-NEXT:    br label [[FOR_BODY:%.*]]
; CHECK:       for.body:
; CHECK-NEXT:    [[I_08:%.*]] = phi i64 [ 0, [[ENTRY:%.*]] ], [ [[INC:%.*]], [[FOR_COND:%.*]] ]
; CHECK-NEXT:    [[ARRAYIDX:%.*]] = getelementptr inbounds i8, i8* [[PTR0:%.*]], i64 [[I_08]]
; CHECK-NEXT:    [[V0:%.*]] = load i8, i8* [[ARRAYIDX]]
; CHECK-NEXT:    [[ARRAYIDX1:%.*]] = getelementptr inbounds i8, i8* [[PTR1:%.*]], i64 [[I_08]]
; CHECK-NEXT:    [[V1:%.*]] = load i8, i8* [[ARRAYIDX1]]
; CHECK-NEXT:    [[CMP3:%.*]] = icmp eq i8 [[V0]], [[V1]]
; CHECK-NEXT:    [[INC]] = add nuw nsw i64 [[I_08]], 1
; CHECK-NEXT:    br i1 [[CMP3]], label [[FOR_PASSTHROUGH:%.*]], label [[CLEANUP:%.*]]
; CHECK:       for.passthrough:
; CHECK-NEXT:    br label [[FOR_COND]]
; CHECK:       for.cond:
; CHECK-NEXT:    [[CMP:%.*]] = icmp ult i64 [[INC]], 8
; CHECK-NEXT:    br i1 [[CMP]], label [[FOR_BODY]], label [[CLEANUP]]
; CHECK:       cleanup:
; CHECK-NEXT:    [[RES:%.*]] = phi i1 [ false, [[FOR_BODY]] ], [ true, [[FOR_COND]] ]
; CHECK-NEXT:    ret i1 [[RES]]
;
entry:
  br label %for.body

for.body:
  %i.08 = phi i64 [ 0, %entry ], [ %inc, %for.cond ]
  %arrayidx = getelementptr inbounds i8, i8* %ptr0, i64 %i.08
  %v0 = load i8, i8* %arrayidx
  %arrayidx1 = getelementptr inbounds i8, i8* %ptr1, i64 %i.08
  %v1 = load i8, i8* %arrayidx1
  %cmp3 = icmp eq i8 %v0, %v1
  %inc = add nuw nsw i64 %i.08, 1
  br i1 %cmp3, label %for.passthrough, label %cleanup

for.passthrough:
  br label %for.cond

for.cond:
  %cmp = icmp ult i64 %inc, 8
  br i1 %cmp, label %for.body, label %cleanup

cleanup:
  %res = phi i1 [ false, %for.body ], [ true, %for.cond ]
  ret i1 %res
}

define i1 @body_cmp_is_not_equality(i8* %ptr0, i8* %ptr1) {
; CHECK-LABEL: @body_cmp_is_not_equality(
; CHECK-NEXT:  entry:
; CHECK-NEXT:    br label [[FOR_BODY:%.*]]
; CHECK:       for.body:
; CHECK-NEXT:    [[I_08:%.*]] = phi i64 [ 0, [[ENTRY:%.*]] ], [ [[INC:%.*]], [[FOR_COND:%.*]] ]
; CHECK-NEXT:    [[ARRAYIDX:%.*]] = getelementptr inbounds i8, i8* [[PTR0:%.*]], i64 [[I_08]]
; CHECK-NEXT:    [[V0:%.*]] = load i8, i8* [[ARRAYIDX]]
; CHECK-NEXT:    [[ARRAYIDX1:%.*]] = getelementptr inbounds i8, i8* [[PTR1:%.*]], i64 [[I_08]]
; CHECK-NEXT:    [[V1:%.*]] = load i8, i8* [[ARRAYIDX1]]
; CHECK-NEXT:    [[CMP3:%.*]] = icmp ult i8 [[V0]], [[V1]]
; CHECK-NEXT:    [[INC]] = add nuw nsw i64 [[I_08]], 1
; CHECK-NEXT:    br i1 [[CMP3]], label [[FOR_COND]], label [[CLEANUP:%.*]]
; CHECK:       for.cond:
; CHECK-NEXT:    [[CMP:%.*]] = icmp ult i64 [[INC]], 8
; CHECK-NEXT:    br i1 [[CMP]], label [[FOR_BODY]], label [[CLEANUP]]
; CHECK:       cleanup:
; CHECK-NEXT:    [[RES:%.*]] = phi i1 [ false, [[FOR_BODY]] ], [ true, [[FOR_COND]] ]
; CHECK-NEXT:    ret i1 [[RES]]
;
entry:
  br label %for.body

for.body:
  %i.08 = phi i64 [ 0, %entry ], [ %inc, %for.cond ]
  %arrayidx = getelementptr inbounds i8, i8* %ptr0, i64 %i.08
  %v0 = load i8, i8* %arrayidx
  %arrayidx1 = getelementptr inbounds i8, i8* %ptr1, i64 %i.08
  %v1 = load i8, i8* %arrayidx1
  %cmp3 = icmp ult i8 %v0, %v1
  %inc = add nuw nsw i64 %i.08, 1
  br i1 %cmp3, label %for.cond, label %cleanup

for.cond:
  %cmp = icmp ult i64 %inc, 8
  br i1 %cmp, label %for.body, label %cleanup

cleanup:
  %res = phi i1 [ false, %for.body ], [ true, %for.cond ]
  ret i1 %res
}

define i1 @only_one_load(i8* %ptr0, i8* %ptr1) {
; CHECK-LABEL: @only_one_load(
; CHECK-NEXT:  entry:
; CHECK-NEXT:    br label [[FOR_BODY:%.*]]
; CHECK:       for.body:
; CHECK-NEXT:    [[I_08:%.*]] = phi i64 [ 0, [[ENTRY:%.*]] ], [ [[INC:%.*]], [[FOR_COND:%.*]] ]
; CHECK-NEXT:    [[ARRAYIDX:%.*]] = getelementptr inbounds i8, i8* [[PTR0:%.*]], i64 [[I_08]]
; CHECK-NEXT:    [[V0:%.*]] = load i8, i8* [[ARRAYIDX]]
; CHECK-NEXT:    [[CMP3:%.*]] = icmp eq i8 [[V0]], 0
; CHECK-NEXT:    [[INC]] = add nuw nsw i64 [[I_08]], 1
; CHECK-NEXT:    br i1 [[CMP3]], label [[FOR_COND]], label [[CLEANUP:%.*]]
; CHECK:       for.cond:
; CHECK-NEXT:    [[CMP:%.*]] = icmp ult i64 [[INC]], 8
; CHECK-NEXT:    br i1 [[CMP]], label [[FOR_BODY]], label [[CLEANUP]]
; CHECK:       cleanup:
; CHECK-NEXT:    [[RES:%.*]] = phi i1 [ false, [[FOR_BODY]] ], [ true, [[FOR_COND]] ]
; CHECK-NEXT:    ret i1 [[RES]]
;
entry:
  br label %for.body

for.body:
  %i.08 = phi i64 [ 0, %entry ], [ %inc, %for.cond ]
  %arrayidx = getelementptr inbounds i8, i8* %ptr0, i64 %i.08
  %v0 = load i8, i8* %arrayidx
  %cmp3 = icmp eq i8 %v0, 0
  %inc = add nuw nsw i64 %i.08, 1
  br i1 %cmp3, label %for.cond, label %cleanup

for.cond:
  %cmp = icmp ult i64 %inc, 8
  br i1 %cmp, label %for.body, label %cleanup

cleanup:
  %res = phi i1 [ false, %for.body ], [ true, %for.cond ]
  ret i1 %res
}

define i1 @loads_of_less_than_byte(i7* %ptr0, i7* %ptr1) {
; CHECK-LABEL: @loads_of_less_than_byte(
; CHECK-NEXT:  entry:
; CHECK-NEXT:    br label [[FOR_BODY:%.*]]
; CHECK:       for.body:
; CHECK-NEXT:    [[I_08:%.*]] = phi i64 [ 0, [[ENTRY:%.*]] ], [ [[INC:%.*]], [[FOR_COND:%.*]] ]
; CHECK-NEXT:    [[ARRAYIDX:%.*]] = getelementptr inbounds i7, i7* [[PTR0:%.*]], i64 [[I_08]]
; CHECK-NEXT:    [[V0:%.*]] = load i7, i7* [[ARRAYIDX]]
; CHECK-NEXT:    [[ARRAYIDX1:%.*]] = getelementptr inbounds i7, i7* [[PTR1:%.*]], i64 [[I_08]]
; CHECK-NEXT:    [[V1:%.*]] = load i7, i7* [[ARRAYIDX1]]
; CHECK-NEXT:    [[CMP3:%.*]] = icmp ult i7 [[V0]], [[V1]]
; CHECK-NEXT:    [[INC]] = add nuw nsw i64 [[I_08]], 1
; CHECK-NEXT:    br i1 [[CMP3]], label [[FOR_COND]], label [[CLEANUP:%.*]]
; CHECK:       for.cond:
; CHECK-NEXT:    [[CMP:%.*]] = icmp ult i64 [[INC]], 8
; CHECK-NEXT:    br i1 [[CMP]], label [[FOR_BODY]], label [[CLEANUP]]
; CHECK:       cleanup:
; CHECK-NEXT:    [[RES:%.*]] = phi i1 [ false, [[FOR_BODY]] ], [ true, [[FOR_COND]] ]
; CHECK-NEXT:    ret i1 [[RES]]
;
entry:
  br label %for.body

for.body:
  %i.08 = phi i64 [ 0, %entry ], [ %inc, %for.cond ]
  %arrayidx = getelementptr inbounds i7, i7* %ptr0, i64 %i.08
  %v0 = load i7, i7* %arrayidx
  %arrayidx1 = getelementptr inbounds i7, i7* %ptr1, i64 %i.08
  %v1 = load i7, i7* %arrayidx1
  %cmp3 = icmp ult i7 %v0, %v1
  %inc = add nuw nsw i64 %i.08, 1
  br i1 %cmp3, label %for.cond, label %cleanup

for.cond:
  %cmp = icmp ult i64 %inc, 8
  br i1 %cmp, label %for.body, label %cleanup

cleanup:
  %res = phi i1 [ false, %for.body ], [ true, %for.cond ]
  ret i1 %res
}

define i1 @loads_of_not_multiple_of_a_byte(i9* %ptr0, i9* %ptr1) {
; CHECK-LABEL: @loads_of_not_multiple_of_a_byte(
; CHECK-NEXT:  entry:
; CHECK-NEXT:    br label [[FOR_BODY:%.*]]
; CHECK:       for.body:
; CHECK-NEXT:    [[I_08:%.*]] = phi i64 [ 0, [[ENTRY:%.*]] ], [ [[INC:%.*]], [[FOR_COND:%.*]] ]
; CHECK-NEXT:    [[ARRAYIDX:%.*]] = getelementptr inbounds i9, i9* [[PTR0:%.*]], i64 [[I_08]]
; CHECK-NEXT:    [[V0:%.*]] = load i9, i9* [[ARRAYIDX]]
; CHECK-NEXT:    [[ARRAYIDX1:%.*]] = getelementptr inbounds i9, i9* [[PTR1:%.*]], i64 [[I_08]]
; CHECK-NEXT:    [[V1:%.*]] = load i9, i9* [[ARRAYIDX1]]
; CHECK-NEXT:    [[CMP3:%.*]] = icmp ult i9 [[V0]], [[V1]]
; CHECK-NEXT:    [[INC]] = add nuw nsw i64 [[I_08]], 1
; CHECK-NEXT:    br i1 [[CMP3]], label [[FOR_COND]], label [[CLEANUP:%.*]]
; CHECK:       for.cond:
; CHECK-NEXT:    [[CMP:%.*]] = icmp ult i64 [[INC]], 8
; CHECK-NEXT:    br i1 [[CMP]], label [[FOR_BODY]], label [[CLEANUP]]
; CHECK:       cleanup:
; CHECK-NEXT:    [[RES:%.*]] = phi i1 [ false, [[FOR_BODY]] ], [ true, [[FOR_COND]] ]
; CHECK-NEXT:    ret i1 [[RES]]
;
entry:
  br label %for.body

for.body:
  %i.08 = phi i64 [ 0, %entry ], [ %inc, %for.cond ]
  %arrayidx = getelementptr inbounds i9, i9* %ptr0, i64 %i.08
  %v0 = load i9, i9* %arrayidx
  %arrayidx1 = getelementptr inbounds i9, i9* %ptr1, i64 %i.08
  %v1 = load i9, i9* %arrayidx1
  %cmp3 = icmp ult i9 %v0, %v1
  %inc = add nuw nsw i64 %i.08, 1
  br i1 %cmp3, label %for.cond, label %cleanup

for.cond:
  %cmp = icmp ult i64 %inc, 8
  br i1 %cmp, label %for.body, label %cleanup

cleanup:
  %res = phi i1 [ false, %for.body ], [ true, %for.cond ]
  ret i1 %res
}

define i1 @loop_instruction_used_in_phi_node_outside_loop(i8* %ptr0, i8* %ptr1) {
; CHECK-LABEL: @loop_instruction_used_in_phi_node_outside_loop(
; CHECK-NEXT:  entry:
; CHECK-NEXT:    br label [[FOR_BODY:%.*]]
; CHECK:       for.body:
; CHECK-NEXT:    [[I_08:%.*]] = phi i64 [ 0, [[ENTRY:%.*]] ], [ [[INC:%.*]], [[FOR_COND:%.*]] ]
; CHECK-NEXT:    [[ARRAYIDX:%.*]] = getelementptr inbounds i8, i8* [[PTR0:%.*]], i64 [[I_08]]
; CHECK-NEXT:    [[V0:%.*]] = load i8, i8* [[ARRAYIDX]]
; CHECK-NEXT:    [[ARRAYIDX1:%.*]] = getelementptr inbounds i8, i8* [[PTR1:%.*]], i64 [[I_08]]
; CHECK-NEXT:    [[V1:%.*]] = load i8, i8* [[ARRAYIDX1]]
; CHECK-NEXT:    [[CMP3:%.*]] = icmp eq i8 [[V0]], [[V1]]
; CHECK-NEXT:    [[INC]] = add nuw nsw i64 [[I_08]], 1
; CHECK-NEXT:    br i1 [[CMP3]], label [[FOR_COND]], label [[CLEANUP:%.*]]
; CHECK:       for.cond:
; CHECK-NEXT:    [[CMP:%.*]] = icmp ult i64 [[INC]], 8
; CHECK-NEXT:    br i1 [[CMP]], label [[FOR_BODY]], label [[CLEANUP]]
; CHECK:       cleanup:
; CHECK-NEXT:    [[RES:%.*]] = phi i1 [ [[CMP3]], [[FOR_BODY]] ], [ true, [[FOR_COND]] ]
; CHECK-NEXT:    ret i1 [[RES]]
;
entry:
  br label %for.body

for.body:
  %i.08 = phi i64 [ 0, %entry ], [ %inc, %for.cond ]
  %arrayidx = getelementptr inbounds i8, i8* %ptr0, i64 %i.08
  %v0 = load i8, i8* %arrayidx
  %arrayidx1 = getelementptr inbounds i8, i8* %ptr1, i64 %i.08
  %v1 = load i8, i8* %arrayidx1
  %cmp3 = icmp eq i8 %v0, %v1
  %inc = add nuw nsw i64 %i.08, 1
  br i1 %cmp3, label %for.cond, label %cleanup

for.cond:
  %cmp = icmp ult i64 %inc, 8
  br i1 %cmp, label %for.body, label %cleanup

cleanup:
  %res = phi i1 [ %cmp3, %for.body ], [ true, %for.cond ]
  ret i1 %res
}

define i1 @loop_has_write(i8* %ptr0, i8* %ptr1, i32* %write) {
; CHECK-LABEL: @loop_has_write(
; CHECK-NEXT:  entry:
; CHECK-NEXT:    br label [[FOR_BODY:%.*]]
; CHECK:       for.body:
; CHECK-NEXT:    [[I_08:%.*]] = phi i64 [ 0, [[ENTRY:%.*]] ], [ [[INC:%.*]], [[FOR_COND:%.*]] ]
; CHECK-NEXT:    [[ARRAYIDX:%.*]] = getelementptr inbounds i8, i8* [[PTR0:%.*]], i64 [[I_08]]
; CHECK-NEXT:    [[V0:%.*]] = load i8, i8* [[ARRAYIDX]]
; CHECK-NEXT:    [[ARRAYIDX1:%.*]] = getelementptr inbounds i8, i8* [[PTR1:%.*]], i64 [[I_08]]
; CHECK-NEXT:    [[V1:%.*]] = load i8, i8* [[ARRAYIDX1]]
; CHECK-NEXT:    [[CMP3:%.*]] = icmp eq i8 [[V0]], [[V1]]
; CHECK-NEXT:    [[INC]] = add nuw nsw i64 [[I_08]], 1
; CHECK-NEXT:    br i1 [[CMP3]], label [[FOR_COND]], label [[CLEANUP:%.*]]
; CHECK:       for.cond:
; CHECK-NEXT:    [[CMP:%.*]] = icmp ult i64 [[INC]], 8
; CHECK-NEXT:    store i32 0, i32* [[WRITE:%.*]]
; CHECK-NEXT:    br i1 [[CMP]], label [[FOR_BODY]], label [[CLEANUP]]
; CHECK:       cleanup:
; CHECK-NEXT:    [[RES:%.*]] = phi i1 [ false, [[FOR_BODY]] ], [ true, [[FOR_COND]] ]
; CHECK-NEXT:    ret i1 [[RES]]
;
entry:
  br label %for.body

for.body:
  %i.08 = phi i64 [ 0, %entry ], [ %inc, %for.cond ]
  %arrayidx = getelementptr inbounds i8, i8* %ptr0, i64 %i.08
  %v0 = load i8, i8* %arrayidx
  %arrayidx1 = getelementptr inbounds i8, i8* %ptr1, i64 %i.08
  %v1 = load i8, i8* %arrayidx1
  %cmp3 = icmp eq i8 %v0, %v1
  %inc = add nuw nsw i64 %i.08, 1
  br i1 %cmp3, label %for.cond, label %cleanup

for.cond:
  %cmp = icmp ult i64 %inc, 8
  store i32 0, i32* %write
  br i1 %cmp, label %for.body, label %cleanup

cleanup:
  %res = phi i1 [ false, %for.body ], [ true, %for.cond ]
  ret i1 %res
}

declare void @sink()
define i1 @loop_has_call(i8* %ptr0, i8* %ptr1, i32* %load) {
; CHECK-LABEL: @loop_has_call(
; CHECK-NEXT:  entry:
; CHECK-NEXT:    br label [[FOR_BODY:%.*]]
; CHECK:       for.body:
; CHECK-NEXT:    [[I_08:%.*]] = phi i64 [ 0, [[ENTRY:%.*]] ], [ [[INC:%.*]], [[FOR_COND:%.*]] ]
; CHECK-NEXT:    [[ARRAYIDX:%.*]] = getelementptr inbounds i8, i8* [[PTR0:%.*]], i64 [[I_08]]
; CHECK-NEXT:    [[V0:%.*]] = load i8, i8* [[ARRAYIDX]]
; CHECK-NEXT:    [[ARRAYIDX1:%.*]] = getelementptr inbounds i8, i8* [[PTR1:%.*]], i64 [[I_08]]
; CHECK-NEXT:    [[V1:%.*]] = load i8, i8* [[ARRAYIDX1]]
; CHECK-NEXT:    [[CMP3:%.*]] = icmp eq i8 [[V0]], [[V1]]
; CHECK-NEXT:    [[INC]] = add nuw nsw i64 [[I_08]], 1
; CHECK-NEXT:    br i1 [[CMP3]], label [[FOR_COND]], label [[CLEANUP:%.*]]
; CHECK:       for.cond:
; CHECK-NEXT:    [[CMP:%.*]] = icmp ult i64 [[INC]], 8
; CHECK-NEXT:    tail call void @sink()
; CHECK-NEXT:    br i1 [[CMP]], label [[FOR_BODY]], label [[CLEANUP]]
; CHECK:       cleanup:
; CHECK-NEXT:    [[RES:%.*]] = phi i1 [ false, [[FOR_BODY]] ], [ true, [[FOR_COND]] ]
; CHECK-NEXT:    ret i1 [[RES]]
;
entry:
  br label %for.body

for.body:
  %i.08 = phi i64 [ 0, %entry ], [ %inc, %for.cond ]
  %arrayidx = getelementptr inbounds i8, i8* %ptr0, i64 %i.08
  %v0 = load i8, i8* %arrayidx
  %arrayidx1 = getelementptr inbounds i8, i8* %ptr1, i64 %i.08
  %v1 = load i8, i8* %arrayidx1
  %cmp3 = icmp eq i8 %v0, %v1
  %inc = add nuw nsw i64 %i.08, 1
  br i1 %cmp3, label %for.cond, label %cleanup

for.cond:
  %cmp = icmp ult i64 %inc, 8
  tail call void @sink()
  br i1 %cmp, label %for.body, label %cleanup

cleanup:
  %res = phi i1 [ false, %for.body ], [ true, %for.cond ]
  ret i1 %res
}

define i1 @loop_has_atomic_load(i8* %ptr0, i8* %ptr1, i32* %load) {
; CHECK-LABEL: @loop_has_atomic_load(
; CHECK-NEXT:  entry:
; CHECK-NEXT:    br label [[FOR_BODY:%.*]]
; CHECK:       for.body:
; CHECK-NEXT:    [[I_08:%.*]] = phi i64 [ 0, [[ENTRY:%.*]] ], [ [[INC:%.*]], [[FOR_COND:%.*]] ]
; CHECK-NEXT:    [[ARRAYIDX:%.*]] = getelementptr inbounds i8, i8* [[PTR0:%.*]], i64 [[I_08]]
; CHECK-NEXT:    [[V0:%.*]] = load i8, i8* [[ARRAYIDX]]
; CHECK-NEXT:    [[ARRAYIDX1:%.*]] = getelementptr inbounds i8, i8* [[PTR1:%.*]], i64 [[I_08]]
; CHECK-NEXT:    [[V1:%.*]] = load i8, i8* [[ARRAYIDX1]]
; CHECK-NEXT:    [[CMP3:%.*]] = icmp eq i8 [[V0]], [[V1]]
; CHECK-NEXT:    [[INC]] = add nuw nsw i64 [[I_08]], 1
; CHECK-NEXT:    br i1 [[CMP3]], label [[FOR_COND]], label [[CLEANUP:%.*]]
; CHECK:       for.cond:
; CHECK-NEXT:    [[CMP:%.*]] = icmp ult i64 [[INC]], 8
; CHECK-NEXT:    [[TMP:%.*]] = load atomic i32, i32* [[LOAD:%.*]] unordered, align 1
; CHECK-NEXT:    br i1 [[CMP]], label [[FOR_BODY]], label [[CLEANUP]]
; CHECK:       cleanup:
; CHECK-NEXT:    [[RES:%.*]] = phi i1 [ false, [[FOR_BODY]] ], [ true, [[FOR_COND]] ]
; CHECK-NEXT:    ret i1 [[RES]]
;
entry:
  br label %for.body

for.body:
  %i.08 = phi i64 [ 0, %entry ], [ %inc, %for.cond ]
  %arrayidx = getelementptr inbounds i8, i8* %ptr0, i64 %i.08
  %v0 = load i8, i8* %arrayidx
  %arrayidx1 = getelementptr inbounds i8, i8* %ptr1, i64 %i.08
  %v1 = load i8, i8* %arrayidx1
  %cmp3 = icmp eq i8 %v0, %v1
  %inc = add nuw nsw i64 %i.08, 1
  br i1 %cmp3, label %for.cond, label %cleanup

for.cond:
  %cmp = icmp ult i64 %inc, 8
  %tmp = load atomic i32, i32* %load unordered, align 1
  br i1 %cmp, label %for.body, label %cleanup

cleanup:
  %res = phi i1 [ false, %for.body ], [ true, %for.cond ]
  ret i1 %res
}

define i1 @different_load_step(i8* %ptr) {
; CHECK-LABEL: @different_load_step(
; CHECK-NEXT:  entry:
; CHECK-NEXT:    [[ADD_PTR:%.*]] = getelementptr inbounds i8, i8* [[PTR:%.*]], i64 8
; CHECK-NEXT:    br label [[FOR_BODY:%.*]]
; CHECK:       for.body:
; CHECK-NEXT:    [[I_015:%.*]] = phi i64 [ 0, [[ENTRY:%.*]] ], [ [[INC:%.*]], [[FOR_INC:%.*]] ]
; CHECK-NEXT:    [[PTR1_014:%.*]] = phi i8* [ [[ADD_PTR]], [[ENTRY]] ], [ [[ADD_PTR3:%.*]], [[FOR_INC]] ]
; CHECK-NEXT:    [[PTR0_013:%.*]] = phi i8* [ [[PTR]], [[ENTRY]] ], [ [[INCDEC_PTR:%.*]], [[FOR_INC]] ]
; CHECK-NEXT:    [[V0:%.*]] = load i8, i8* [[PTR0_013]]
; CHECK-NEXT:    [[V1:%.*]] = load i8, i8* [[PTR1_014]]
; CHECK-NEXT:    [[CMP2:%.*]] = icmp eq i8 [[V0]], [[V1]]
; CHECK-NEXT:    br i1 [[CMP2]], label [[FOR_INC]], label [[CLEANUP:%.*]]
; CHECK:       for.inc:
; CHECK-NEXT:    [[INC]] = add nuw nsw i64 [[I_015]], 1
; CHECK-NEXT:    [[INCDEC_PTR]] = getelementptr inbounds i8, i8* [[PTR0_013]], i64 1
; CHECK-NEXT:    [[ADD_PTR3]] = getelementptr inbounds i8, i8* [[PTR1_014]], i64 2
; CHECK-NEXT:    [[CMP:%.*]] = icmp ult i64 [[INC]], 16
; CHECK-NEXT:    br i1 [[CMP]], label [[FOR_BODY]], label [[CLEANUP]]
; CHECK:       cleanup:
; CHECK-NEXT:    [[RES:%.*]] = phi i1 [ false, [[FOR_BODY]] ], [ true, [[FOR_INC]] ]
; CHECK-NEXT:    ret i1 [[RES]]
;
entry:
  %add.ptr = getelementptr inbounds i8, i8* %ptr, i64 8
  br label %for.body

for.body:
  %i.015 = phi i64 [ 0, %entry ], [ %inc, %for.inc ]
  %ptr1.014 = phi i8* [ %add.ptr, %entry ], [ %add.ptr3, %for.inc ]
  %ptr0.013 = phi i8* [ %ptr, %entry ], [ %incdec.ptr, %for.inc ]
  %v0 = load i8, i8* %ptr0.013
  %v1 = load i8, i8* %ptr1.014
  %cmp2 = icmp eq i8 %v0, %v1
  br i1 %cmp2, label %for.inc, label %cleanup

for.inc:
  %inc = add nuw nsw i64 %i.015, 1
  %incdec.ptr = getelementptr inbounds i8, i8* %ptr0.013, i64 1
  %add.ptr3 = getelementptr inbounds i8, i8* %ptr1.014, i64 2
  %cmp = icmp ult i64 %inc, 16
  br i1 %cmp, label %for.body, label %cleanup

cleanup:
  %res = phi i1 [ false, %for.body ], [ true, %for.inc ]
  ret i1 %res
}

define i1 @step_is_variable(i8* %ptr, i64 %step) {
; CHECK-LABEL: @step_is_variable(
; CHECK-NEXT:  entry:
; CHECK-NEXT:    [[ADD_PTR:%.*]] = getelementptr inbounds i8, i8* [[PTR:%.*]], i64 8
; CHECK-NEXT:    br label [[FOR_BODY:%.*]]
; CHECK:       for.body:
; CHECK-NEXT:    [[I_015:%.*]] = phi i64 [ 0, [[ENTRY:%.*]] ], [ [[INC:%.*]], [[FOR_INC:%.*]] ]
; CHECK-NEXT:    [[PTR1_014:%.*]] = phi i8* [ [[ADD_PTR]], [[ENTRY]] ], [ [[ADD_PTR3:%.*]], [[FOR_INC]] ]
; CHECK-NEXT:    [[PTR0_013:%.*]] = phi i8* [ [[PTR]], [[ENTRY]] ], [ [[INCDEC_PTR:%.*]], [[FOR_INC]] ]
; CHECK-NEXT:    [[V0:%.*]] = load i8, i8* [[PTR0_013]]
; CHECK-NEXT:    [[V1:%.*]] = load i8, i8* [[PTR1_014]]
; CHECK-NEXT:    [[CMP2:%.*]] = icmp eq i8 [[V0]], [[V1]]
; CHECK-NEXT:    br i1 [[CMP2]], label [[FOR_INC]], label [[CLEANUP:%.*]]
; CHECK:       for.inc:
; CHECK-NEXT:    [[INC]] = add nuw nsw i64 [[I_015]], [[STEP:%.*]]
; CHECK-NEXT:    [[INCDEC_PTR]] = getelementptr inbounds i8, i8* [[PTR0_013]], i64 1
; CHECK-NEXT:    [[ADD_PTR3]] = getelementptr inbounds i8, i8* [[PTR1_014]], i64 1
; CHECK-NEXT:    [[CMP:%.*]] = icmp ult i64 [[INC]], 16
; CHECK-NEXT:    br i1 [[CMP]], label [[FOR_BODY]], label [[CLEANUP]]
; CHECK:       cleanup:
; CHECK-NEXT:    [[RES:%.*]] = phi i1 [ false, [[FOR_BODY]] ], [ true, [[FOR_INC]] ]
; CHECK-NEXT:    ret i1 [[RES]]
;
entry:
  %add.ptr = getelementptr inbounds i8, i8* %ptr, i64 8
  br label %for.body

for.body:
  %i.015 = phi i64 [ 0, %entry ], [ %inc, %for.inc ]
  %ptr1.014 = phi i8* [ %add.ptr, %entry ], [ %add.ptr3, %for.inc ]
  %ptr0.013 = phi i8* [ %ptr, %entry ], [ %incdec.ptr, %for.inc ]
  %v0 = load i8, i8* %ptr0.013
  %v1 = load i8, i8* %ptr1.014
  %cmp2 = icmp eq i8 %v0, %v1
  br i1 %cmp2, label %for.inc, label %cleanup

for.inc:
  %inc = add nuw nsw i64 %i.015, %step
  %incdec.ptr = getelementptr inbounds i8, i8* %ptr0.013, i64 1
  %add.ptr3 = getelementptr inbounds i8, i8* %ptr1.014, i64 1
  %cmp = icmp ult i64 %inc, 16
  br i1 %cmp, label %for.body, label %cleanup

cleanup:
  %res = phi i1 [ false, %for.body ], [ true, %for.inc ]
  ret i1 %res
}

define i1 @load_step_is_variable(i8* %ptr, i64 %step) {
; CHECK-LABEL: @load_step_is_variable(
; CHECK-NEXT:  entry:
; CHECK-NEXT:    [[ADD_PTR:%.*]] = getelementptr inbounds i8, i8* [[PTR:%.*]], i64 8
; CHECK-NEXT:    br label [[FOR_BODY:%.*]]
; CHECK:       for.body:
; CHECK-NEXT:    [[I_015:%.*]] = phi i64 [ 0, [[ENTRY:%.*]] ], [ [[INC:%.*]], [[FOR_INC:%.*]] ]
; CHECK-NEXT:    [[PTR1_014:%.*]] = phi i8* [ [[ADD_PTR]], [[ENTRY]] ], [ [[ADD_PTR3:%.*]], [[FOR_INC]] ]
; CHECK-NEXT:    [[PTR0_013:%.*]] = phi i8* [ [[PTR]], [[ENTRY]] ], [ [[INCDEC_PTR:%.*]], [[FOR_INC]] ]
; CHECK-NEXT:    [[V0:%.*]] = load i8, i8* [[PTR0_013]]
; CHECK-NEXT:    [[V1:%.*]] = load i8, i8* [[PTR1_014]]
; CHECK-NEXT:    [[CMP2:%.*]] = icmp eq i8 [[V0]], [[V1]]
; CHECK-NEXT:    br i1 [[CMP2]], label [[FOR_INC]], label [[CLEANUP:%.*]]
; CHECK:       for.inc:
; CHECK-NEXT:    [[INC]] = add nuw nsw i64 [[I_015]], 1
; CHECK-NEXT:    [[INCDEC_PTR]] = getelementptr inbounds i8, i8* [[PTR0_013]], i64 [[STEP:%.*]]
; CHECK-NEXT:    [[ADD_PTR3]] = getelementptr inbounds i8, i8* [[PTR1_014]], i64 [[STEP]]
; CHECK-NEXT:    [[CMP:%.*]] = icmp ult i64 [[INC]], 16
; CHECK-NEXT:    br i1 [[CMP]], label [[FOR_BODY]], label [[CLEANUP]]
; CHECK:       cleanup:
; CHECK-NEXT:    [[RES:%.*]] = phi i1 [ false, [[FOR_BODY]] ], [ true, [[FOR_INC]] ]
; CHECK-NEXT:    ret i1 [[RES]]
;
entry:
  %add.ptr = getelementptr inbounds i8, i8* %ptr, i64 8
  br label %for.body

for.body:
  %i.015 = phi i64 [ 0, %entry ], [ %inc, %for.inc ]
  %ptr1.014 = phi i8* [ %add.ptr, %entry ], [ %add.ptr3, %for.inc ]
  %ptr0.013 = phi i8* [ %ptr, %entry ], [ %incdec.ptr, %for.inc ]
  %v0 = load i8, i8* %ptr0.013
  %v1 = load i8, i8* %ptr1.014
  %cmp2 = icmp eq i8 %v0, %v1
  br i1 %cmp2, label %for.inc, label %cleanup

for.inc:
  %inc = add nuw nsw i64 %i.015, 1
  %incdec.ptr = getelementptr inbounds i8, i8* %ptr0.013, i64 %step
  %add.ptr3 = getelementptr inbounds i8, i8* %ptr1.014, i64 %step
  %cmp = icmp ult i64 %inc, 16
  br i1 %cmp, label %for.body, label %cleanup

cleanup:
  %res = phi i1 [ false, %for.body ], [ true, %for.inc ]
  ret i1 %res
}

define i1 @step_and_load_step_is_variable(i8* %ptr, i64 %step) {
; CHECK-LABEL: @step_and_load_step_is_variable(
; CHECK-NEXT:  entry:
; CHECK-NEXT:    [[ADD_PTR:%.*]] = getelementptr inbounds i8, i8* [[PTR:%.*]], i64 8
; CHECK-NEXT:    br label [[FOR_BODY:%.*]]
; CHECK:       for.body:
; CHECK-NEXT:    [[I_015:%.*]] = phi i64 [ 0, [[ENTRY:%.*]] ], [ [[INC:%.*]], [[FOR_INC:%.*]] ]
; CHECK-NEXT:    [[PTR1_014:%.*]] = phi i8* [ [[ADD_PTR]], [[ENTRY]] ], [ [[ADD_PTR3:%.*]], [[FOR_INC]] ]
; CHECK-NEXT:    [[PTR0_013:%.*]] = phi i8* [ [[PTR]], [[ENTRY]] ], [ [[INCDEC_PTR:%.*]], [[FOR_INC]] ]
; CHECK-NEXT:    [[V0:%.*]] = load i8, i8* [[PTR0_013]]
; CHECK-NEXT:    [[V1:%.*]] = load i8, i8* [[PTR1_014]]
; CHECK-NEXT:    [[CMP2:%.*]] = icmp eq i8 [[V0]], [[V1]]
; CHECK-NEXT:    br i1 [[CMP2]], label [[FOR_INC]], label [[CLEANUP:%.*]]
; CHECK:       for.inc:
; CHECK-NEXT:    [[INC]] = add nuw nsw i64 [[I_015]], [[STEP:%.*]]
; CHECK-NEXT:    [[INCDEC_PTR]] = getelementptr inbounds i8, i8* [[PTR0_013]], i64 [[STEP]]
; CHECK-NEXT:    [[ADD_PTR3]] = getelementptr inbounds i8, i8* [[PTR1_014]], i64 [[STEP]]
; CHECK-NEXT:    [[CMP:%.*]] = icmp ult i64 [[INC]], 16
; CHECK-NEXT:    br i1 [[CMP]], label [[FOR_BODY]], label [[CLEANUP]]
; CHECK:       cleanup:
; CHECK-NEXT:    [[RES:%.*]] = phi i1 [ false, [[FOR_BODY]] ], [ true, [[FOR_INC]] ]
; CHECK-NEXT:    ret i1 [[RES]]
;
entry:
  %add.ptr = getelementptr inbounds i8, i8* %ptr, i64 8
  br label %for.body

for.body:
  %i.015 = phi i64 [ 0, %entry ], [ %inc, %for.inc ]
  %ptr1.014 = phi i8* [ %add.ptr, %entry ], [ %add.ptr3, %for.inc ]
  %ptr0.013 = phi i8* [ %ptr, %entry ], [ %incdec.ptr, %for.inc ]
  %v0 = load i8, i8* %ptr0.013
  %v1 = load i8, i8* %ptr1.014
  %cmp2 = icmp eq i8 %v0, %v1
  br i1 %cmp2, label %for.inc, label %cleanup

for.inc:
  %inc = add nuw nsw i64 %i.015, %step
  %incdec.ptr = getelementptr inbounds i8, i8* %ptr0.013, i64 %step
  %add.ptr3 = getelementptr inbounds i8, i8* %ptr1.014, i64 %step
  %cmp = icmp ult i64 %inc, 16
  br i1 %cmp, label %for.body, label %cleanup

cleanup:
  %res = phi i1 [ false, %for.body ], [ true, %for.inc ]
  ret i1 %res
}

define i1 @load_step_not_affine(i8* %ptr) {
; CHECK-LABEL: @load_step_not_affine(
; CHECK-NEXT:  entry:
; CHECK-NEXT:    [[ADD_PTR:%.*]] = getelementptr inbounds i8, i8* [[PTR:%.*]], i64 8
; CHECK-NEXT:    br label [[FOR_BODY:%.*]]
; CHECK:       for.body:
; CHECK-NEXT:    [[I_018:%.*]] = phi i64 [ 0, [[ENTRY:%.*]] ], [ [[INC:%.*]], [[FOR_INC:%.*]] ]
; CHECK-NEXT:    [[PTR1_017:%.*]] = phi i8* [ [[ADD_PTR]], [[ENTRY]] ], [ [[ADD_PTR4:%.*]], [[FOR_INC]] ]
; CHECK-NEXT:    [[PTR0_016:%.*]] = phi i8* [ [[PTR]], [[ENTRY]] ], [ [[ADD_PTR3:%.*]], [[FOR_INC]] ]
; CHECK-NEXT:    [[V0:%.*]] = load i8, i8* [[PTR0_016]]
; CHECK-NEXT:    [[V1:%.*]] = load i8, i8* [[PTR1_017]]
; CHECK-NEXT:    [[CMP2:%.*]] = icmp eq i8 [[V0]], [[V1]]
; CHECK-NEXT:    br i1 [[CMP2]], label [[FOR_INC]], label [[CLEANUP:%.*]]
; CHECK:       for.inc:
; CHECK-NEXT:    [[INC]] = add nuw nsw i64 [[I_018]], 1
; CHECK-NEXT:    [[ADD_PTR3]] = getelementptr inbounds i8, i8* [[PTR0_016]], i64 [[INC]]
; CHECK-NEXT:    [[ADD_PTR4]] = getelementptr inbounds i8, i8* [[PTR1_017]], i64 [[INC]]
; CHECK-NEXT:    [[CMP:%.*]] = icmp ult i64 [[INC]], 16
; CHECK-NEXT:    br i1 [[CMP]], label [[FOR_BODY]], label [[CLEANUP]]
; CHECK:       cleanup:
; CHECK-NEXT:    [[RES:%.*]] = phi i1 [ false, [[FOR_BODY]] ], [ true, [[FOR_INC]] ]
; CHECK-NEXT:    ret i1 [[RES]]
;
entry:
  %add.ptr = getelementptr inbounds i8, i8* %ptr, i64 8
  br label %for.body

for.body:
  %i.018 = phi i64 [ 0, %entry ], [ %inc, %for.inc ]
  %ptr1.017 = phi i8* [ %add.ptr, %entry ], [ %add.ptr4, %for.inc ]
  %ptr0.016 = phi i8* [ %ptr, %entry ], [ %add.ptr3, %for.inc ]
  %v0 = load i8, i8* %ptr0.016
  %v1 = load i8, i8* %ptr1.017
  %cmp2 = icmp eq i8 %v0, %v1
  br i1 %cmp2, label %for.inc, label %cleanup

for.inc:
  %inc = add nuw nsw i64 %i.018, 1
  %add.ptr3 = getelementptr inbounds i8, i8* %ptr0.016, i64 %inc
  %add.ptr4 = getelementptr inbounds i8, i8* %ptr1.017, i64 %inc
  %cmp = icmp ult i64 %inc, 16
  br i1 %cmp, label %for.body, label %cleanup

cleanup:
  %res = phi i1 [ false, %for.body ], [ true, %for.inc ]
  ret i1 %res
}

define i1 @no_overlap_between_loads(i8* %ptr) {
; CHECK-LABEL: @no_overlap_between_loads(
; CHECK-NEXT:  entry:
; CHECK-NEXT:    [[ADD_PTR:%.*]] = getelementptr inbounds i8, i8* [[PTR:%.*]], i64 8
; CHECK-NEXT:    br label [[FOR_BODY:%.*]]
; CHECK:       for.body:
; CHECK-NEXT:    [[I_016:%.*]] = phi i64 [ 0, [[ENTRY:%.*]] ], [ [[INC:%.*]], [[FOR_INC:%.*]] ]
; CHECK-NEXT:    [[PTR1_015:%.*]] = phi i8* [ [[ADD_PTR]], [[ENTRY]] ], [ [[ADD_PTR4:%.*]], [[FOR_INC]] ]
; CHECK-NEXT:    [[PTR0_014:%.*]] = phi i8* [ [[PTR]], [[ENTRY]] ], [ [[ADD_PTR3:%.*]], [[FOR_INC]] ]
; CHECK-NEXT:    [[V0:%.*]] = load i8, i8* [[PTR0_014]]
; CHECK-NEXT:    [[V1:%.*]] = load i8, i8* [[PTR1_015]]
; CHECK-NEXT:    [[CMP2:%.*]] = icmp eq i8 [[V0]], [[V1]]
; CHECK-NEXT:    br i1 [[CMP2]], label [[FOR_INC]], label [[CLEANUP:%.*]]
; CHECK:       for.inc:
; CHECK-NEXT:    [[INC]] = add nuw nsw i64 [[I_016]], 1
; CHECK-NEXT:    [[ADD_PTR3]] = getelementptr inbounds i8, i8* [[PTR0_014]], i64 2
; CHECK-NEXT:    [[ADD_PTR4]] = getelementptr inbounds i8, i8* [[PTR1_015]], i64 2
; CHECK-NEXT:    [[CMP:%.*]] = icmp ult i64 [[INC]], 16
; CHECK-NEXT:    br i1 [[CMP]], label [[FOR_BODY]], label [[CLEANUP]]
; CHECK:       cleanup:
; CHECK-NEXT:    [[RES:%.*]] = phi i1 [ false, [[FOR_BODY]] ], [ true, [[FOR_INC]] ]
; CHECK-NEXT:    ret i1 [[RES]]
;
entry:
  %add.ptr = getelementptr inbounds i8, i8* %ptr, i64 8
  br label %for.body

for.body:
  %i.016 = phi i64 [ 0, %entry ], [ %inc, %for.inc ]
  %ptr1.015 = phi i8* [ %add.ptr, %entry ], [ %add.ptr4, %for.inc ]
  %ptr0.014 = phi i8* [ %ptr, %entry ], [ %add.ptr3, %for.inc ]
  %v0 = load i8, i8* %ptr0.014
  %v1 = load i8, i8* %ptr1.015
  %cmp2 = icmp eq i8 %v0, %v1
  br i1 %cmp2, label %for.inc, label %cleanup

for.inc:
  %inc = add nuw nsw i64 %i.016, 1
  %add.ptr3 = getelementptr inbounds i8, i8* %ptr0.014, i64 2
  %add.ptr4 = getelementptr inbounds i8, i8* %ptr1.015, i64 2
  %cmp = icmp ult i64 %inc, 16
  br i1 %cmp, label %for.body, label %cleanup

cleanup:
  %res = phi i1 [ false, %for.body ], [ true, %for.inc ]
  ret i1 %res
}

define i1 @volatile_loads(i8* %ptr) {
; CHECK-LABEL: @volatile_loads(
; CHECK-NEXT:  entry:
; CHECK-NEXT:    [[ADD_PTR:%.*]] = getelementptr inbounds i8, i8* [[PTR:%.*]], i64 8
; CHECK-NEXT:    br label [[FOR_BODY:%.*]]
; CHECK:       for.body:
; CHECK-NEXT:    [[I_016:%.*]] = phi i64 [ 0, [[ENTRY:%.*]] ], [ [[INC:%.*]], [[FOR_INC:%.*]] ]
; CHECK-NEXT:    [[PTR1_015:%.*]] = phi i8* [ [[ADD_PTR]], [[ENTRY]] ], [ [[ADD_PTR4:%.*]], [[FOR_INC]] ]
; CHECK-NEXT:    [[PTR0_014:%.*]] = phi i8* [ [[PTR]], [[ENTRY]] ], [ [[ADD_PTR3:%.*]], [[FOR_INC]] ]
; CHECK-NEXT:    [[V0:%.*]] = load volatile i8, i8* [[PTR0_014]]
; CHECK-NEXT:    [[V1:%.*]] = load volatile i8, i8* [[PTR1_015]]
; CHECK-NEXT:    [[CMP2:%.*]] = icmp eq i8 [[V0]], [[V1]]
; CHECK-NEXT:    br i1 [[CMP2]], label [[FOR_INC]], label [[CLEANUP:%.*]]
; CHECK:       for.inc:
; CHECK-NEXT:    [[INC]] = add nuw nsw i64 [[I_016]], 1
; CHECK-NEXT:    [[ADD_PTR3]] = getelementptr inbounds i8, i8* [[PTR0_014]], i64 1
; CHECK-NEXT:    [[ADD_PTR4]] = getelementptr inbounds i8, i8* [[PTR1_015]], i64 1
; CHECK-NEXT:    [[CMP:%.*]] = icmp ult i64 [[INC]], 16
; CHECK-NEXT:    br i1 [[CMP]], label [[FOR_BODY]], label [[CLEANUP]]
; CHECK:       cleanup:
; CHECK-NEXT:    [[RES:%.*]] = phi i1 [ false, [[FOR_BODY]] ], [ true, [[FOR_INC]] ]
; CHECK-NEXT:    ret i1 [[RES]]
;
entry:
  %add.ptr = getelementptr inbounds i8, i8* %ptr, i64 8
  br label %for.body

for.body:
  %i.016 = phi i64 [ 0, %entry ], [ %inc, %for.inc ]
  %ptr1.015 = phi i8* [ %add.ptr, %entry ], [ %add.ptr4, %for.inc ]
  %ptr0.014 = phi i8* [ %ptr, %entry ], [ %add.ptr3, %for.inc ]
  %v0 = load volatile i8, i8* %ptr0.014
  %v1 = load volatile i8, i8* %ptr1.015
  %cmp2 = icmp eq i8 %v0, %v1
  br i1 %cmp2, label %for.inc, label %cleanup

for.inc:
  %inc = add nuw nsw i64 %i.016, 1
  %add.ptr3 = getelementptr inbounds i8, i8* %ptr0.014, i64 1
  %add.ptr4 = getelementptr inbounds i8, i8* %ptr1.015, i64 1
  %cmp = icmp ult i64 %inc, 16
  br i1 %cmp, label %for.body, label %cleanup

cleanup:
  %res = phi i1 [ false, %for.body ], [ true, %for.inc ]
  ret i1 %res
}

define i1 @atomic_loads(i8* %ptr) {
; CHECK-LABEL: @atomic_loads(
; CHECK-NEXT:  entry:
; CHECK-NEXT:    [[ADD_PTR:%.*]] = getelementptr inbounds i8, i8* [[PTR:%.*]], i64 8
; CHECK-NEXT:    br label [[FOR_BODY:%.*]]
; CHECK:       for.body:
; CHECK-NEXT:    [[I_016:%.*]] = phi i64 [ 0, [[ENTRY:%.*]] ], [ [[INC:%.*]], [[FOR_INC:%.*]] ]
; CHECK-NEXT:    [[PTR1_015:%.*]] = phi i8* [ [[ADD_PTR]], [[ENTRY]] ], [ [[ADD_PTR4:%.*]], [[FOR_INC]] ]
; CHECK-NEXT:    [[PTR0_014:%.*]] = phi i8* [ [[PTR]], [[ENTRY]] ], [ [[ADD_PTR3:%.*]], [[FOR_INC]] ]
; CHECK-NEXT:    [[V0:%.*]] = load atomic i8, i8* [[PTR0_014]] unordered, align 1
; CHECK-NEXT:    [[V1:%.*]] = load atomic i8, i8* [[PTR1_015]] unordered, align 1
; CHECK-NEXT:    [[CMP2:%.*]] = icmp eq i8 [[V0]], [[V1]]
; CHECK-NEXT:    br i1 [[CMP2]], label [[FOR_INC]], label [[CLEANUP:%.*]]
; CHECK:       for.inc:
; CHECK-NEXT:    [[INC]] = add nuw nsw i64 [[I_016]], 1
; CHECK-NEXT:    [[ADD_PTR3]] = getelementptr inbounds i8, i8* [[PTR0_014]], i64 1
; CHECK-NEXT:    [[ADD_PTR4]] = getelementptr inbounds i8, i8* [[PTR1_015]], i64 1
; CHECK-NEXT:    [[CMP:%.*]] = icmp ult i64 [[INC]], 16
; CHECK-NEXT:    br i1 [[CMP]], label [[FOR_BODY]], label [[CLEANUP]]
; CHECK:       cleanup:
; CHECK-NEXT:    [[RES:%.*]] = phi i1 [ false, [[FOR_BODY]] ], [ true, [[FOR_INC]] ]
; CHECK-NEXT:    ret i1 [[RES]]
;
entry:
  %add.ptr = getelementptr inbounds i8, i8* %ptr, i64 8
  br label %for.body

for.body:
  %i.016 = phi i64 [ 0, %entry ], [ %inc, %for.inc ]
  %ptr1.015 = phi i8* [ %add.ptr, %entry ], [ %add.ptr4, %for.inc ]
  %ptr0.014 = phi i8* [ %ptr, %entry ], [ %add.ptr3, %for.inc ]
  %v0 = load atomic i8, i8* %ptr0.014 unordered, align 1
  %v1 = load atomic i8, i8* %ptr1.015 unordered, align 1
  %cmp2 = icmp eq i8 %v0, %v1
  br i1 %cmp2, label %for.inc, label %cleanup

for.inc:
  %inc = add nuw nsw i64 %i.016, 1
  %add.ptr3 = getelementptr inbounds i8, i8* %ptr0.014, i64 1
  %add.ptr4 = getelementptr inbounds i8, i8* %ptr1.015, i64 1
  %cmp = icmp ult i64 %inc, 16
  br i1 %cmp, label %for.body, label %cleanup

cleanup:
  %res = phi i1 [ false, %for.body ], [ true, %for.inc ]
  ret i1 %res
}

define i1 @address_space(i8 addrspace(1)* %ptr) {
; CHECK-LABEL: @address_space(
; CHECK-NEXT:  entry:
; CHECK-NEXT:    [[ADD_PTR:%.*]] = getelementptr inbounds i8, i8 addrspace(1)* [[PTR:%.*]], i64 8
; CHECK-NEXT:    br label [[FOR_BODY:%.*]]
; CHECK:       for.body:
; CHECK-NEXT:    [[I_016:%.*]] = phi i64 [ 0, [[ENTRY:%.*]] ], [ [[INC:%.*]], [[FOR_INC:%.*]] ]
; CHECK-NEXT:    [[PTR1_015:%.*]] = phi i8 addrspace(1)* [ [[ADD_PTR]], [[ENTRY]] ], [ [[ADD_PTR4:%.*]], [[FOR_INC]] ]
; CHECK-NEXT:    [[PTR0_014:%.*]] = phi i8 addrspace(1)* [ [[PTR]], [[ENTRY]] ], [ [[ADD_PTR3:%.*]], [[FOR_INC]] ]
; CHECK-NEXT:    [[V0:%.*]] = load i8, i8 addrspace(1)* [[PTR0_014]]
; CHECK-NEXT:    [[V1:%.*]] = load i8, i8 addrspace(1)* [[PTR1_015]]
; CHECK-NEXT:    [[CMP2:%.*]] = icmp eq i8 [[V0]], [[V1]]
; CHECK-NEXT:    br i1 [[CMP2]], label [[FOR_INC]], label [[CLEANUP:%.*]]
; CHECK:       for.inc:
; CHECK-NEXT:    [[INC]] = add nuw nsw i64 [[I_016]], 1
; CHECK-NEXT:    [[ADD_PTR3]] = getelementptr inbounds i8, i8 addrspace(1)* [[PTR0_014]], i64 1
; CHECK-NEXT:    [[ADD_PTR4]] = getelementptr inbounds i8, i8 addrspace(1)* [[PTR1_015]], i64 1
; CHECK-NEXT:    [[CMP:%.*]] = icmp ult i64 [[INC]], 16
; CHECK-NEXT:    br i1 [[CMP]], label [[FOR_BODY]], label [[CLEANUP]]
; CHECK:       cleanup:
; CHECK-NEXT:    [[RES:%.*]] = phi i1 [ false, [[FOR_BODY]] ], [ true, [[FOR_INC]] ]
; CHECK-NEXT:    ret i1 [[RES]]
;
entry:
  %add.ptr = getelementptr inbounds i8, i8 addrspace(1)* %ptr, i64 8
  br label %for.body

for.body:
  %i.016 = phi i64 [ 0, %entry ], [ %inc, %for.inc ]
  %ptr1.015 = phi i8 addrspace(1)* [ %add.ptr, %entry ], [ %add.ptr4, %for.inc ]
  %ptr0.014 = phi i8 addrspace(1)* [ %ptr, %entry ], [ %add.ptr3, %for.inc ]
  %v0 = load i8, i8 addrspace(1)* %ptr0.014
  %v1 = load i8, i8 addrspace(1)* %ptr1.015
  %cmp2 = icmp eq i8 %v0, %v1
  br i1 %cmp2, label %for.inc, label %cleanup

for.inc:
  %inc = add nuw nsw i64 %i.016, 1
  %add.ptr3 = getelementptr inbounds i8, i8 addrspace(1)* %ptr0.014, i64 1
  %add.ptr4 = getelementptr inbounds i8, i8 addrspace(1)* %ptr1.015, i64 1
  %cmp = icmp ult i64 %inc, 16
  br i1 %cmp, label %for.body, label %cleanup

cleanup:
  %res = phi i1 [ false, %for.body ], [ true, %for.inc ]
  ret i1 %res
}

; See https://bugs.llvm.org/show_bug.cgi?id=43206 for original reduced (but runnable) test:
;
; bool do_check(int i_max, int j_max, int**bptr, int* fillch) {
;   for (int i = 0; i < i_max; i++)
;       for (int j = 0; j < j_max; j++)
;         if (bptr[i][j] != fillch[i])
;           return 1;
;   return 0;
; }
; The loads proceed differently here - fillch[i] changes once per outer loop,
; while bptr[i][j] changes both in inner loop, and in outer loop.
define i1 @pr43206_different_loops(i32 %i_max, i32 %j_max, i32** %bptr, i32* %fillch) {
; CHECK-LABEL: @pr43206_different_loops(
; CHECK-NEXT:  entry:
; CHECK-NEXT:    [[CMP31:%.*]] = icmp sgt i32 [[I_MAX:%.*]], 0
; CHECK-NEXT:    [[CMP229:%.*]] = icmp sgt i32 [[J_MAX:%.*]], 0
; CHECK-NEXT:    [[OR_COND:%.*]] = and i1 [[CMP31]], [[CMP229]]
; CHECK-NEXT:    br i1 [[OR_COND]], label [[FOR_COND1_PREHEADER_US_PREHEADER:%.*]], label [[CLEANUP12:%.*]]
; CHECK:       for.cond1.preheader.us.preheader:
; CHECK-NEXT:    [[WIDE_TRIP_COUNT38:%.*]] = zext i32 [[I_MAX]] to i64
; CHECK-NEXT:    [[WIDE_TRIP_COUNT:%.*]] = zext i32 [[J_MAX]] to i64
; CHECK-NEXT:    br label [[FOR_COND1_PREHEADER_US:%.*]]
; CHECK:       for.cond1.preheader.us:
; CHECK-NEXT:    [[INDVARS_IV36:%.*]] = phi i64 [ 0, [[FOR_COND1_PREHEADER_US_PREHEADER]] ], [ [[INDVARS_IV_NEXT37:%.*]], [[FOR_COND1_FOR_INC10_CRIT_EDGE_US:%.*]] ]
; CHECK-NEXT:    [[ARRAYIDX_US:%.*]] = getelementptr inbounds i32*, i32** [[BPTR:%.*]], i64 [[INDVARS_IV36]]
; CHECK-NEXT:    [[V0:%.*]] = load i32*, i32** [[ARRAYIDX_US]], align 8
; CHECK-NEXT:    [[ARRAYIDX8_US:%.*]] = getelementptr inbounds i32, i32* [[FILLCH:%.*]], i64 [[INDVARS_IV36]]
; CHECK-NEXT:    [[V1:%.*]] = load i32, i32* [[ARRAYIDX8_US]], align 4
; CHECK-NEXT:    br label [[FOR_BODY4_US:%.*]]
; CHECK:       for.cond1.us:
; CHECK-NEXT:    [[EXITCOND:%.*]] = icmp eq i64 [[INDVARS_IV_NEXT:%.*]], [[WIDE_TRIP_COUNT]]
; CHECK-NEXT:    br i1 [[EXITCOND]], label [[FOR_COND1_FOR_INC10_CRIT_EDGE_US]], label [[FOR_BODY4_US]]
; CHECK:       for.body4.us:
; CHECK-NEXT:    [[INDVARS_IV:%.*]] = phi i64 [ 0, [[FOR_COND1_PREHEADER_US]] ], [ [[INDVARS_IV_NEXT]], [[FOR_COND1_US:%.*]] ]
; CHECK-NEXT:    [[ARRAYIDX6_US:%.*]] = getelementptr inbounds i32, i32* [[V0]], i64 [[INDVARS_IV]]
; CHECK-NEXT:    [[V2:%.*]] = load i32, i32* [[ARRAYIDX6_US]], align 4
; CHECK-NEXT:    [[CMP9_US:%.*]] = icmp eq i32 [[V2]], [[V1]]
; CHECK-NEXT:    [[INDVARS_IV_NEXT]] = add nuw nsw i64 [[INDVARS_IV]], 1
; CHECK-NEXT:    br i1 [[CMP9_US]], label [[FOR_COND1_US]], label [[CLEANUP12_LOOPEXIT:%.*]]
; CHECK:       for.cond1.for.inc10_crit_edge.us:
; CHECK-NEXT:    [[INDVARS_IV_NEXT37]] = add nuw nsw i64 [[INDVARS_IV36]], 1
; CHECK-NEXT:    [[EXITCOND39:%.*]] = icmp eq i64 [[INDVARS_IV_NEXT37]], [[WIDE_TRIP_COUNT38]]
; CHECK-NEXT:    br i1 [[EXITCOND39]], label [[CLEANUP12_LOOPEXIT1:%.*]], label [[FOR_COND1_PREHEADER_US]]
; CHECK:       cleanup12.loopexit:
; CHECK-NEXT:    br label [[CLEANUP12]]
; CHECK:       cleanup12.loopexit1:
; CHECK-NEXT:    br label [[CLEANUP12]]
; CHECK:       cleanup12:
; CHECK-NEXT:    [[V3:%.*]] = phi i1 [ false, [[ENTRY:%.*]] ], [ true, [[CLEANUP12_LOOPEXIT]] ], [ false, [[CLEANUP12_LOOPEXIT1]] ]
; CHECK-NEXT:    ret i1 [[V3]]
;
entry:
  %cmp31 = icmp sgt i32 %i_max, 0
  %cmp229 = icmp sgt i32 %j_max, 0
  %or.cond = and i1 %cmp31, %cmp229
  br i1 %or.cond, label %for.cond1.preheader.us.preheader, label %cleanup12

for.cond1.preheader.us.preheader:                 ; preds = %entry
  %wide.trip.count38 = zext i32 %i_max to i64
  %wide.trip.count = zext i32 %j_max to i64
  br label %for.cond1.preheader.us

for.cond1.preheader.us:                           ; preds = %for.cond1.for.inc10_crit_edge.us, %for.cond1.preheader.us.preheader
  %indvars.iv36 = phi i64 [ 0, %for.cond1.preheader.us.preheader ], [ %indvars.iv.next37, %for.cond1.for.inc10_crit_edge.us ]
  %arrayidx.us = getelementptr inbounds i32*, i32** %bptr, i64 %indvars.iv36
  %v0 = load i32*, i32** %arrayidx.us, align 8
  %arrayidx8.us = getelementptr inbounds i32, i32* %fillch, i64 %indvars.iv36
  %v1 = load i32, i32* %arrayidx8.us, align 4
  br label %for.body4.us

for.cond1.us:                                     ; preds = %for.body4.us
  %exitcond = icmp eq i64 %indvars.iv.next, %wide.trip.count
  br i1 %exitcond, label %for.cond1.for.inc10_crit_edge.us, label %for.body4.us

for.body4.us:                                     ; preds = %for.cond1.us, %for.cond1.preheader.us
  %indvars.iv = phi i64 [ 0, %for.cond1.preheader.us ], [ %indvars.iv.next, %for.cond1.us ]
  %arrayidx6.us = getelementptr inbounds i32, i32* %v0, i64 %indvars.iv
  %v2 = load i32, i32* %arrayidx6.us, align 4
  %cmp9.us = icmp eq i32 %v2, %v1
  %indvars.iv.next = add nuw nsw i64 %indvars.iv, 1
  br i1 %cmp9.us, label %for.cond1.us, label %cleanup12

for.cond1.for.inc10_crit_edge.us:                 ; preds = %for.cond1.us
  %indvars.iv.next37 = add nuw nsw i64 %indvars.iv36, 1
  %exitcond39 = icmp eq i64 %indvars.iv.next37, %wide.trip.count38
  br i1 %exitcond39, label %cleanup12, label %for.cond1.preheader.us

cleanup12:                                        ; preds = %for.cond1.for.inc10_crit_edge.us, %for.body4.us, %entry
  %v3 = phi i1 [ false, %entry ], [ true, %for.body4.us ], [ false, %for.cond1.for.inc10_crit_edge.us ]
  ret i1 %v3
}

; From https://bugs.llvm.org/show_bug.cgi?id=43687
define void @body_always_branches_to_latch(i16* %a, i16* %b, i32) {
; CHECK-LABEL: @body_always_branches_to_latch(
; CHECK-NEXT:  entry:
; CHECK-NEXT:    br label [[BODY:%.*]]
; CHECK:       body:
; CHECK-NEXT:    [[A_DATA:%.*]] = load i16, i16* [[A:%.*]]
; CHECK-NEXT:    [[B_DATA:%.*]] = load i16, i16* [[B:%.*]]
; CHECK-NEXT:    [[COMPARED_EQUAL:%.*]] = icmp eq i16 [[A_DATA]], [[B_DATA]]
; CHECK-NEXT:    br i1 [[COMPARED_EQUAL]], label [[LATCH:%.*]], label [[LATCH]]
; CHECK:       latch:
; CHECK-NEXT:    [[SHOULD_CONTINUE:%.*]] = icmp slt i32 undef, 79
; CHECK-NEXT:    br i1 [[SHOULD_CONTINUE]], label [[BODY]], label [[END:%.*]]
; CHECK:       end:
; CHECK-NEXT:    ret void
;
entry:
  br label %body

body:                                   ; preds = %latch, %for.end1317
  %a_data = load i16, i16* %a
  %b_data = load i16, i16* %b
  %compared_equal = icmp eq i16 %a_data, %b_data
  br i1 %compared_equal, label %latch, label %latch

latch:                                    ; preds = %body, %body
  %should_continue = icmp slt i32 undef, 79
  br i1 %should_continue, label %body, label %end

end:                                    ; preds = %latch
  ret void
}