xref: /llvm-project-15.0.7/llvm/test/Transforms/LoopPredication/basic.ll (revision 8906a0fe)

; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
; RUN: opt -S -loop-predication < %s 2>&1 | FileCheck %s
; RUN: opt -S -passes='require<scalar-evolution>,loop-mssa(loop-predication)' -verify-memoryssa < %s 2>&1 | FileCheck %s

declare void @llvm.experimental.guard(i1, ...)

define i32 @unsigned_loop_0_to_n_ult_check(i32* %array, i32 %length, i32 %n) {
; CHECK-LABEL: @unsigned_loop_0_to_n_ult_check(
; CHECK-NEXT:  entry:
; CHECK-NEXT:    [[TMP5:%.*]] = icmp eq i32 [[N:%.*]], 0
; CHECK-NEXT:    br i1 [[TMP5]], label [[EXIT:%.*]], label [[LOOP_PREHEADER:%.*]]
; CHECK:       loop.preheader:
; CHECK-NEXT:    [[TMP0:%.*]] = icmp ule i32 [[N]], [[LENGTH:%.*]]
; CHECK-NEXT:    [[TMP1:%.*]] = icmp ult i32 0, [[LENGTH]]
; CHECK-NEXT:    [[TMP2:%.*]] = and i1 [[TMP1]], [[TMP0]]
; CHECK-NEXT:    br label [[LOOP:%.*]]
; CHECK:       loop:
; CHECK-NEXT:    [[LOOP_ACC:%.*]] = phi i32 [ [[LOOP_ACC_NEXT:%.*]], [[LOOP]] ], [ 0, [[LOOP_PREHEADER]] ]
; CHECK-NEXT:    [[I:%.*]] = phi i32 [ [[I_NEXT:%.*]], [[LOOP]] ], [ 0, [[LOOP_PREHEADER]] ]
; CHECK-NEXT:    call void (i1, ...) @llvm.experimental.guard(i1 [[TMP2]], i32 9) [ "deopt"() ]
; CHECK-NEXT:    [[I_I64:%.*]] = zext i32 [[I]] to i64
; CHECK-NEXT:    [[ARRAY_I_PTR:%.*]] = getelementptr inbounds i32, i32* [[ARRAY:%.*]], i64 [[I_I64]]
; CHECK-NEXT:    [[ARRAY_I:%.*]] = load i32, i32* [[ARRAY_I_PTR]], align 4
; CHECK-NEXT:    [[LOOP_ACC_NEXT]] = add i32 [[LOOP_ACC]], [[ARRAY_I]]
; CHECK-NEXT:    [[I_NEXT]] = add nuw i32 [[I]], 1
; CHECK-NEXT:    [[CONTINUE:%.*]] = icmp ult i32 [[I_NEXT]], [[N]]
; CHECK-NEXT:    br i1 [[CONTINUE]], label [[LOOP]], label [[EXIT_LOOPEXIT:%.*]]
; CHECK:       exit.loopexit:
; CHECK-NEXT:    [[LOOP_ACC_NEXT_LCSSA:%.*]] = phi i32 [ [[LOOP_ACC_NEXT]], [[LOOP]] ]
; CHECK-NEXT:    br label [[EXIT]]
; CHECK:       exit:
; CHECK-NEXT:    [[RESULT:%.*]] = phi i32 [ 0, [[ENTRY:%.*]] ], [ [[LOOP_ACC_NEXT_LCSSA]], [[EXIT_LOOPEXIT]] ]
; CHECK-NEXT:    ret i32 [[RESULT]]
;
entry:
  %tmp5 = icmp eq i32 %n, 0
  br i1 %tmp5, label %exit, label %loop.preheader

loop.preheader:
  br label %loop

loop:
  %loop.acc = phi i32 [ %loop.acc.next, %loop ], [ 0, %loop.preheader ]
  %i = phi i32 [ %i.next, %loop ], [ 0, %loop.preheader ]
  %within.bounds = icmp ult i32 %i, %length
  call void (i1, ...) @llvm.experimental.guard(i1 %within.bounds, i32 9) [ "deopt"() ]

  %i.i64 = zext i32 %i to i64
  %array.i.ptr = getelementptr inbounds i32, i32* %array, i64 %i.i64
  %array.i = load i32, i32* %array.i.ptr, align 4
  %loop.acc.next = add i32 %loop.acc, %array.i

  %i.next = add nuw i32 %i, 1
  %continue = icmp ult i32 %i.next, %n
  br i1 %continue, label %loop, label %exit

exit:
  %result = phi i32 [ 0, %entry ], [ %loop.acc.next, %loop ]
  ret i32 %result
}

define i32 @unsigned_loop_0_to_n_ule_latch_ult_check(i32* %array, i32 %length, i32 %n) {
; CHECK-LABEL: @unsigned_loop_0_to_n_ule_latch_ult_check(
; CHECK-NEXT:  entry:
; CHECK-NEXT:    [[TMP5:%.*]] = icmp eq i32 [[N:%.*]], 0
; CHECK-NEXT:    br i1 [[TMP5]], label [[EXIT:%.*]], label [[LOOP_PREHEADER:%.*]]
; CHECK:       loop.preheader:
; CHECK-NEXT:    [[TMP0:%.*]] = icmp ult i32 [[N]], [[LENGTH:%.*]]
; CHECK-NEXT:    [[TMP1:%.*]] = icmp ult i32 0, [[LENGTH]]
; CHECK-NEXT:    [[TMP2:%.*]] = and i1 [[TMP1]], [[TMP0]]
; CHECK-NEXT:    br label [[LOOP:%.*]]
; CHECK:       loop:
; CHECK-NEXT:    [[LOOP_ACC:%.*]] = phi i32 [ [[LOOP_ACC_NEXT:%.*]], [[LOOP]] ], [ 0, [[LOOP_PREHEADER]] ]
; CHECK-NEXT:    [[I:%.*]] = phi i32 [ [[I_NEXT:%.*]], [[LOOP]] ], [ 0, [[LOOP_PREHEADER]] ]
; CHECK-NEXT:    call void (i1, ...) @llvm.experimental.guard(i1 [[TMP2]], i32 9) [ "deopt"() ]
; CHECK-NEXT:    [[I_I64:%.*]] = zext i32 [[I]] to i64
; CHECK-NEXT:    [[ARRAY_I_PTR:%.*]] = getelementptr inbounds i32, i32* [[ARRAY:%.*]], i64 [[I_I64]]
; CHECK-NEXT:    [[ARRAY_I:%.*]] = load i32, i32* [[ARRAY_I_PTR]], align 4
; CHECK-NEXT:    [[LOOP_ACC_NEXT]] = add i32 [[LOOP_ACC]], [[ARRAY_I]]
; CHECK-NEXT:    [[I_NEXT]] = add nuw i32 [[I]], 1
; CHECK-NEXT:    [[CONTINUE:%.*]] = icmp ule i32 [[I_NEXT]], [[N]]
; CHECK-NEXT:    br i1 [[CONTINUE]], label [[LOOP]], label [[EXIT_LOOPEXIT:%.*]]
; CHECK:       exit.loopexit:
; CHECK-NEXT:    [[LOOP_ACC_NEXT_LCSSA:%.*]] = phi i32 [ [[LOOP_ACC_NEXT]], [[LOOP]] ]
; CHECK-NEXT:    br label [[EXIT]]
; CHECK:       exit:
; CHECK-NEXT:    [[RESULT:%.*]] = phi i32 [ 0, [[ENTRY:%.*]] ], [ [[LOOP_ACC_NEXT_LCSSA]], [[EXIT_LOOPEXIT]] ]
; CHECK-NEXT:    ret i32 [[RESULT]]
;
entry:
  %tmp5 = icmp eq i32 %n, 0
  br i1 %tmp5, label %exit, label %loop.preheader

loop.preheader:
  br label %loop

loop:
  %loop.acc = phi i32 [ %loop.acc.next, %loop ], [ 0, %loop.preheader ]
  %i = phi i32 [ %i.next, %loop ], [ 0, %loop.preheader ]
  %within.bounds = icmp ult i32 %i, %length
  call void (i1, ...) @llvm.experimental.guard(i1 %within.bounds, i32 9) [ "deopt"() ]

  %i.i64 = zext i32 %i to i64
  %array.i.ptr = getelementptr inbounds i32, i32* %array, i64 %i.i64
  %array.i = load i32, i32* %array.i.ptr, align 4
  %loop.acc.next = add i32 %loop.acc, %array.i

  %i.next = add nuw i32 %i, 1
  %continue = icmp ule i32 %i.next, %n
  br i1 %continue, label %loop, label %exit

exit:
  %result = phi i32 [ 0, %entry ], [ %loop.acc.next, %loop ]
  ret i32 %result
}

define i32 @unsigned_loop_0_to_n_ugt_check(i32* %array, i32 %length, i32 %n) {
; CHECK-LABEL: @unsigned_loop_0_to_n_ugt_check(
; CHECK-NEXT:  entry:
; CHECK-NEXT:    [[TMP5:%.*]] = icmp eq i32 [[N:%.*]], 0
; CHECK-NEXT:    br i1 [[TMP5]], label [[EXIT:%.*]], label [[LOOP_PREHEADER:%.*]]
; CHECK:       loop.preheader:
; CHECK-NEXT:    [[TMP0:%.*]] = icmp ule i32 [[N]], [[LENGTH:%.*]]
; CHECK-NEXT:    [[TMP1:%.*]] = icmp ult i32 0, [[LENGTH]]
; CHECK-NEXT:    [[TMP2:%.*]] = and i1 [[TMP1]], [[TMP0]]
; CHECK-NEXT:    br label [[LOOP:%.*]]
; CHECK:       loop:
; CHECK-NEXT:    [[LOOP_ACC:%.*]] = phi i32 [ [[LOOP_ACC_NEXT:%.*]], [[LOOP]] ], [ 0, [[LOOP_PREHEADER]] ]
; CHECK-NEXT:    [[I:%.*]] = phi i32 [ [[I_NEXT:%.*]], [[LOOP]] ], [ 0, [[LOOP_PREHEADER]] ]
; CHECK-NEXT:    call void (i1, ...) @llvm.experimental.guard(i1 [[TMP2]], i32 9) [ "deopt"() ]
; CHECK-NEXT:    [[I_I64:%.*]] = zext i32 [[I]] to i64
; CHECK-NEXT:    [[ARRAY_I_PTR:%.*]] = getelementptr inbounds i32, i32* [[ARRAY:%.*]], i64 [[I_I64]]
; CHECK-NEXT:    [[ARRAY_I:%.*]] = load i32, i32* [[ARRAY_I_PTR]], align 4
; CHECK-NEXT:    [[LOOP_ACC_NEXT]] = add i32 [[LOOP_ACC]], [[ARRAY_I]]
; CHECK-NEXT:    [[I_NEXT]] = add nuw i32 [[I]], 1
; CHECK-NEXT:    [[CONTINUE:%.*]] = icmp ult i32 [[I_NEXT]], [[N]]
; CHECK-NEXT:    br i1 [[CONTINUE]], label [[LOOP]], label [[EXIT_LOOPEXIT:%.*]]
; CHECK:       exit.loopexit:
; CHECK-NEXT:    [[LOOP_ACC_NEXT_LCSSA:%.*]] = phi i32 [ [[LOOP_ACC_NEXT]], [[LOOP]] ]
; CHECK-NEXT:    br label [[EXIT]]
; CHECK:       exit:
; CHECK-NEXT:    [[RESULT:%.*]] = phi i32 [ 0, [[ENTRY:%.*]] ], [ [[LOOP_ACC_NEXT_LCSSA]], [[EXIT_LOOPEXIT]] ]
; CHECK-NEXT:    ret i32 [[RESULT]]
;
entry:
  %tmp5 = icmp eq i32 %n, 0
  br i1 %tmp5, label %exit, label %loop.preheader

loop.preheader:
  br label %loop

loop:
  %loop.acc = phi i32 [ %loop.acc.next, %loop ], [ 0, %loop.preheader ]
  %i = phi i32 [ %i.next, %loop ], [ 0, %loop.preheader ]
  %within.bounds = icmp ugt i32 %length, %i
  call void (i1, ...) @llvm.experimental.guard(i1 %within.bounds, i32 9) [ "deopt"() ]

  %i.i64 = zext i32 %i to i64
  %array.i.ptr = getelementptr inbounds i32, i32* %array, i64 %i.i64
  %array.i = load i32, i32* %array.i.ptr, align 4
  %loop.acc.next = add i32 %loop.acc, %array.i

  %i.next = add nuw i32 %i, 1
  %continue = icmp ult i32 %i.next, %n
  br i1 %continue, label %loop, label %exit

exit:
  %result = phi i32 [ 0, %entry ], [ %loop.acc.next, %loop ]
  ret i32 %result
}

define i32 @signed_loop_0_to_n_ult_check(i32* %array, i32 %length, i32 %n) {
; CHECK-LABEL: @signed_loop_0_to_n_ult_check(
; CHECK-NEXT:  entry:
; CHECK-NEXT:    [[TMP5:%.*]] = icmp sle i32 [[N:%.*]], 0
; CHECK-NEXT:    br i1 [[TMP5]], label [[EXIT:%.*]], label [[LOOP_PREHEADER:%.*]]
; CHECK:       loop.preheader:
; CHECK-NEXT:    [[TMP0:%.*]] = icmp sle i32 [[N]], [[LENGTH:%.*]]
; CHECK-NEXT:    [[TMP1:%.*]] = icmp ult i32 0, [[LENGTH]]
; CHECK-NEXT:    [[TMP2:%.*]] = and i1 [[TMP1]], [[TMP0]]
; CHECK-NEXT:    br label [[LOOP:%.*]]
; CHECK:       loop:
; CHECK-NEXT:    [[LOOP_ACC:%.*]] = phi i32 [ [[LOOP_ACC_NEXT:%.*]], [[LOOP]] ], [ 0, [[LOOP_PREHEADER]] ]
; CHECK-NEXT:    [[I:%.*]] = phi i32 [ [[I_NEXT:%.*]], [[LOOP]] ], [ 0, [[LOOP_PREHEADER]] ]
; CHECK-NEXT:    call void (i1, ...) @llvm.experimental.guard(i1 [[TMP2]], i32 9) [ "deopt"() ]
; CHECK-NEXT:    [[I_I64:%.*]] = zext i32 [[I]] to i64
; CHECK-NEXT:    [[ARRAY_I_PTR:%.*]] = getelementptr inbounds i32, i32* [[ARRAY:%.*]], i64 [[I_I64]]
; CHECK-NEXT:    [[ARRAY_I:%.*]] = load i32, i32* [[ARRAY_I_PTR]], align 4
; CHECK-NEXT:    [[LOOP_ACC_NEXT]] = add i32 [[LOOP_ACC]], [[ARRAY_I]]
; CHECK-NEXT:    [[I_NEXT]] = add nuw i32 [[I]], 1
; CHECK-NEXT:    [[CONTINUE:%.*]] = icmp slt i32 [[I_NEXT]], [[N]]
; CHECK-NEXT:    br i1 [[CONTINUE]], label [[LOOP]], label [[EXIT_LOOPEXIT:%.*]]
; CHECK:       exit.loopexit:
; CHECK-NEXT:    [[LOOP_ACC_NEXT_LCSSA:%.*]] = phi i32 [ [[LOOP_ACC_NEXT]], [[LOOP]] ]
; CHECK-NEXT:    br label [[EXIT]]
; CHECK:       exit:
; CHECK-NEXT:    [[RESULT:%.*]] = phi i32 [ 0, [[ENTRY:%.*]] ], [ [[LOOP_ACC_NEXT_LCSSA]], [[EXIT_LOOPEXIT]] ]
; CHECK-NEXT:    ret i32 [[RESULT]]
;
entry:
  %tmp5 = icmp sle i32 %n, 0
  br i1 %tmp5, label %exit, label %loop.preheader

loop.preheader:
  br label %loop

loop:
  %loop.acc = phi i32 [ %loop.acc.next, %loop ], [ 0, %loop.preheader ]
  %i = phi i32 [ %i.next, %loop ], [ 0, %loop.preheader ]
  %within.bounds = icmp ult i32 %i, %length
  call void (i1, ...) @llvm.experimental.guard(i1 %within.bounds, i32 9) [ "deopt"() ]

  %i.i64 = zext i32 %i to i64
  %array.i.ptr = getelementptr inbounds i32, i32* %array, i64 %i.i64
  %array.i = load i32, i32* %array.i.ptr, align 4
  %loop.acc.next = add i32 %loop.acc, %array.i

  %i.next = add nuw i32 %i, 1
  %continue = icmp slt i32 %i.next, %n
  br i1 %continue, label %loop, label %exit

exit:
  %result = phi i32 [ 0, %entry ], [ %loop.acc.next, %loop ]
  ret i32 %result
}

define i32 @signed_loop_0_to_n_ult_check_length_range_known(i32* %array, i32* %length.ptr, i32 %n) {
; CHECK-LABEL: @signed_loop_0_to_n_ult_check_length_range_known(
; CHECK-NEXT:  entry:
; CHECK-NEXT:    [[TMP5:%.*]] = icmp sle i32 [[N:%.*]], 0
; CHECK-NEXT:    [[LENGTH:%.*]] = load i32, i32* [[LENGTH_PTR:%.*]], align 4, !range [[RNG0:![0-9]+]]
; CHECK-NEXT:    br i1 [[TMP5]], label [[EXIT:%.*]], label [[LOOP_PREHEADER:%.*]]
; CHECK:       loop.preheader:
; CHECK-NEXT:    [[TMP0:%.*]] = icmp sle i32 [[N]], [[LENGTH]]
; CHECK-NEXT:    [[TMP1:%.*]] = and i1 true, [[TMP0]]
; CHECK-NEXT:    br label [[LOOP:%.*]]
; CHECK:       loop:
; CHECK-NEXT:    [[LOOP_ACC:%.*]] = phi i32 [ [[LOOP_ACC_NEXT:%.*]], [[LOOP]] ], [ 0, [[LOOP_PREHEADER]] ]
; CHECK-NEXT:    [[I:%.*]] = phi i32 [ [[I_NEXT:%.*]], [[LOOP]] ], [ 0, [[LOOP_PREHEADER]] ]
; CHECK-NEXT:    call void (i1, ...) @llvm.experimental.guard(i1 [[TMP1]], i32 9) [ "deopt"() ]
; CHECK-NEXT:    [[I_I64:%.*]] = zext i32 [[I]] to i64
; CHECK-NEXT:    [[ARRAY_I_PTR:%.*]] = getelementptr inbounds i32, i32* [[ARRAY:%.*]], i64 [[I_I64]]
; CHECK-NEXT:    [[ARRAY_I:%.*]] = load i32, i32* [[ARRAY_I_PTR]], align 4
; CHECK-NEXT:    [[LOOP_ACC_NEXT]] = add i32 [[LOOP_ACC]], [[ARRAY_I]]
; CHECK-NEXT:    [[I_NEXT]] = add nuw i32 [[I]], 1
; CHECK-NEXT:    [[CONTINUE:%.*]] = icmp slt i32 [[I_NEXT]], [[N]]
; CHECK-NEXT:    br i1 [[CONTINUE]], label [[LOOP]], label [[EXIT_LOOPEXIT:%.*]]
; CHECK:       exit.loopexit:
; CHECK-NEXT:    [[LOOP_ACC_NEXT_LCSSA:%.*]] = phi i32 [ [[LOOP_ACC_NEXT]], [[LOOP]] ]
; CHECK-NEXT:    br label [[EXIT]]
; CHECK:       exit:
; CHECK-NEXT:    [[RESULT:%.*]] = phi i32 [ 0, [[ENTRY:%.*]] ], [ [[LOOP_ACC_NEXT_LCSSA]], [[EXIT_LOOPEXIT]] ]
; CHECK-NEXT:    ret i32 [[RESULT]]
;
entry:
  %tmp5 = icmp sle i32 %n, 0
  %length = load i32, i32* %length.ptr, !range !{i32 1, i32 2147483648}
  br i1 %tmp5, label %exit, label %loop.preheader

loop.preheader:
  br label %loop

loop:
  %loop.acc = phi i32 [ %loop.acc.next, %loop ], [ 0, %loop.preheader ]
  %i = phi i32 [ %i.next, %loop ], [ 0, %loop.preheader ]
  %within.bounds = icmp ult i32 %i, %length
  call void (i1, ...) @llvm.experimental.guard(i1 %within.bounds, i32 9) [ "deopt"() ]

  %i.i64 = zext i32 %i to i64
  %array.i.ptr = getelementptr inbounds i32, i32* %array, i64 %i.i64
  %array.i = load i32, i32* %array.i.ptr, align 4
  %loop.acc.next = add i32 %loop.acc, %array.i

  %i.next = add nuw i32 %i, 1
  %continue = icmp slt i32 %i.next, %n
  br i1 %continue, label %loop, label %exit

exit:
  %result = phi i32 [ 0, %entry ], [ %loop.acc.next, %loop ]
  ret i32 %result
}

define i32 @signed_loop_0_to_n_inverse_latch_predicate(i32* %array, i32 %length, i32 %n) {
; CHECK-LABEL: @signed_loop_0_to_n_inverse_latch_predicate(
; CHECK-NEXT:  entry:
; CHECK-NEXT:    [[TMP5:%.*]] = icmp sle i32 [[N:%.*]], 0
; CHECK-NEXT:    br i1 [[TMP5]], label [[EXIT:%.*]], label [[LOOP_PREHEADER:%.*]]
; CHECK:       loop.preheader:
; CHECK-NEXT:    [[TMP0:%.*]] = icmp slt i32 [[N]], [[LENGTH:%.*]]
; CHECK-NEXT:    [[TMP1:%.*]] = icmp ult i32 0, [[LENGTH]]
; CHECK-NEXT:    [[TMP2:%.*]] = and i1 [[TMP1]], [[TMP0]]
; CHECK-NEXT:    br label [[LOOP:%.*]]
; CHECK:       loop:
; CHECK-NEXT:    [[LOOP_ACC:%.*]] = phi i32 [ [[LOOP_ACC_NEXT:%.*]], [[LOOP]] ], [ 0, [[LOOP_PREHEADER]] ]
; CHECK-NEXT:    [[I:%.*]] = phi i32 [ [[I_NEXT:%.*]], [[LOOP]] ], [ 0, [[LOOP_PREHEADER]] ]
; CHECK-NEXT:    call void (i1, ...) @llvm.experimental.guard(i1 [[TMP2]], i32 9) [ "deopt"() ]
; CHECK-NEXT:    [[I_I64:%.*]] = zext i32 [[I]] to i64
; CHECK-NEXT:    [[ARRAY_I_PTR:%.*]] = getelementptr inbounds i32, i32* [[ARRAY:%.*]], i64 [[I_I64]]
; CHECK-NEXT:    [[ARRAY_I:%.*]] = load i32, i32* [[ARRAY_I_PTR]], align 4
; CHECK-NEXT:    [[LOOP_ACC_NEXT]] = add i32 [[LOOP_ACC]], [[ARRAY_I]]
; CHECK-NEXT:    [[I_NEXT]] = add nuw i32 [[I]], 1
; CHECK-NEXT:    [[CONTINUE:%.*]] = icmp sgt i32 [[I_NEXT]], [[N]]
; CHECK-NEXT:    br i1 [[CONTINUE]], label [[EXIT_LOOPEXIT:%.*]], label [[LOOP]]
; CHECK:       exit.loopexit:
; CHECK-NEXT:    [[LOOP_ACC_NEXT_LCSSA:%.*]] = phi i32 [ [[LOOP_ACC_NEXT]], [[LOOP]] ]
; CHECK-NEXT:    br label [[EXIT]]
; CHECK:       exit:
; CHECK-NEXT:    [[RESULT:%.*]] = phi i32 [ 0, [[ENTRY:%.*]] ], [ [[LOOP_ACC_NEXT_LCSSA]], [[EXIT_LOOPEXIT]] ]
; CHECK-NEXT:    ret i32 [[RESULT]]
;
entry:
  %tmp5 = icmp sle i32 %n, 0
  br i1 %tmp5, label %exit, label %loop.preheader

loop.preheader:
  br label %loop

loop:
  %loop.acc = phi i32 [ %loop.acc.next, %loop ], [ 0, %loop.preheader ]
  %i = phi i32 [ %i.next, %loop ], [ 0, %loop.preheader ]
  %within.bounds = icmp ult i32 %i, %length
  call void (i1, ...) @llvm.experimental.guard(i1 %within.bounds, i32 9) [ "deopt"() ]

  %i.i64 = zext i32 %i to i64
  %array.i.ptr = getelementptr inbounds i32, i32* %array, i64 %i.i64
  %array.i = load i32, i32* %array.i.ptr, align 4
  %loop.acc.next = add i32 %loop.acc, %array.i

  %i.next = add nuw i32 %i, 1
  %continue = icmp sgt i32 %i.next, %n
  br i1 %continue, label %exit, label %loop

exit:
  %result = phi i32 [ 0, %entry ], [ %loop.acc.next, %loop ]
  ret i32 %result
}

define i32 @signed_loop_0_to_n_sle_latch_ult_check(i32* %array, i32 %length, i32 %n) {
; CHECK-LABEL: @signed_loop_0_to_n_sle_latch_ult_check(
; CHECK-NEXT:  entry:
; CHECK-NEXT:    [[TMP5:%.*]] = icmp sle i32 [[N:%.*]], 0
; CHECK-NEXT:    br i1 [[TMP5]], label [[EXIT:%.*]], label [[LOOP_PREHEADER:%.*]]
; CHECK:       loop.preheader:
; CHECK-NEXT:    [[TMP0:%.*]] = icmp slt i32 [[N]], [[LENGTH:%.*]]
; CHECK-NEXT:    [[TMP1:%.*]] = icmp ult i32 0, [[LENGTH]]
; CHECK-NEXT:    [[TMP2:%.*]] = and i1 [[TMP1]], [[TMP0]]
; CHECK-NEXT:    br label [[LOOP:%.*]]
; CHECK:       loop:
; CHECK-NEXT:    [[LOOP_ACC:%.*]] = phi i32 [ [[LOOP_ACC_NEXT:%.*]], [[LOOP]] ], [ 0, [[LOOP_PREHEADER]] ]
; CHECK-NEXT:    [[I:%.*]] = phi i32 [ [[I_NEXT:%.*]], [[LOOP]] ], [ 0, [[LOOP_PREHEADER]] ]
; CHECK-NEXT:    call void (i1, ...) @llvm.experimental.guard(i1 [[TMP2]], i32 9) [ "deopt"() ]
; CHECK-NEXT:    [[I_I64:%.*]] = zext i32 [[I]] to i64
; CHECK-NEXT:    [[ARRAY_I_PTR:%.*]] = getelementptr inbounds i32, i32* [[ARRAY:%.*]], i64 [[I_I64]]
; CHECK-NEXT:    [[ARRAY_I:%.*]] = load i32, i32* [[ARRAY_I_PTR]], align 4
; CHECK-NEXT:    [[LOOP_ACC_NEXT]] = add i32 [[LOOP_ACC]], [[ARRAY_I]]
; CHECK-NEXT:    [[I_NEXT]] = add nuw i32 [[I]], 1
; CHECK-NEXT:    [[CONTINUE:%.*]] = icmp sle i32 [[I_NEXT]], [[N]]
; CHECK-NEXT:    br i1 [[CONTINUE]], label [[LOOP]], label [[EXIT_LOOPEXIT:%.*]]
; CHECK:       exit.loopexit:
; CHECK-NEXT:    [[LOOP_ACC_NEXT_LCSSA:%.*]] = phi i32 [ [[LOOP_ACC_NEXT]], [[LOOP]] ]
; CHECK-NEXT:    br label [[EXIT]]
; CHECK:       exit:
; CHECK-NEXT:    [[RESULT:%.*]] = phi i32 [ 0, [[ENTRY:%.*]] ], [ [[LOOP_ACC_NEXT_LCSSA]], [[EXIT_LOOPEXIT]] ]
; CHECK-NEXT:    ret i32 [[RESULT]]
;
entry:
  %tmp5 = icmp sle i32 %n, 0
  br i1 %tmp5, label %exit, label %loop.preheader

loop.preheader:
  br label %loop

loop:
  %loop.acc = phi i32 [ %loop.acc.next, %loop ], [ 0, %loop.preheader ]
  %i = phi i32 [ %i.next, %loop ], [ 0, %loop.preheader ]
  %within.bounds = icmp ult i32 %i, %length
  call void (i1, ...) @llvm.experimental.guard(i1 %within.bounds, i32 9) [ "deopt"() ]

  %i.i64 = zext i32 %i to i64
  %array.i.ptr = getelementptr inbounds i32, i32* %array, i64 %i.i64
  %array.i = load i32, i32* %array.i.ptr, align 4
  %loop.acc.next = add i32 %loop.acc, %array.i

  %i.next = add nuw i32 %i, 1
  %continue = icmp sle i32 %i.next, %n
  br i1 %continue, label %loop, label %exit

exit:
  %result = phi i32 [ 0, %entry ], [ %loop.acc.next, %loop ]
  ret i32 %result
}

define i32 @signed_loop_0_to_n_preincrement_latch_check(i32* %array, i32 %length, i32 %n) {
; CHECK-LABEL: @signed_loop_0_to_n_preincrement_latch_check(
; CHECK-NEXT:  entry:
; CHECK-NEXT:    [[TMP5:%.*]] = icmp sle i32 [[N:%.*]], 0
; CHECK-NEXT:    br i1 [[TMP5]], label [[EXIT:%.*]], label [[LOOP_PREHEADER:%.*]]
; CHECK:       loop.preheader:
; CHECK-NEXT:    [[TMP0:%.*]] = add i32 [[LENGTH:%.*]], -1
; CHECK-NEXT:    [[TMP1:%.*]] = icmp sle i32 [[N]], [[TMP0]]
; CHECK-NEXT:    [[TMP2:%.*]] = icmp ult i32 0, [[LENGTH]]
; CHECK-NEXT:    [[TMP3:%.*]] = and i1 [[TMP2]], [[TMP1]]
; CHECK-NEXT:    br label [[LOOP:%.*]]
; CHECK:       loop:
; CHECK-NEXT:    [[LOOP_ACC:%.*]] = phi i32 [ [[LOOP_ACC_NEXT:%.*]], [[LOOP]] ], [ 0, [[LOOP_PREHEADER]] ]
; CHECK-NEXT:    [[I:%.*]] = phi i32 [ [[I_NEXT:%.*]], [[LOOP]] ], [ 0, [[LOOP_PREHEADER]] ]
; CHECK-NEXT:    call void (i1, ...) @llvm.experimental.guard(i1 [[TMP3]], i32 9) [ "deopt"() ]
; CHECK-NEXT:    [[I_I64:%.*]] = zext i32 [[I]] to i64
; CHECK-NEXT:    [[ARRAY_I_PTR:%.*]] = getelementptr inbounds i32, i32* [[ARRAY:%.*]], i64 [[I_I64]]
; CHECK-NEXT:    [[ARRAY_I:%.*]] = load i32, i32* [[ARRAY_I_PTR]], align 4
; CHECK-NEXT:    [[LOOP_ACC_NEXT]] = add i32 [[LOOP_ACC]], [[ARRAY_I]]
; CHECK-NEXT:    [[I_NEXT]] = add i32 [[I]], 1
; CHECK-NEXT:    [[CONTINUE:%.*]] = icmp slt i32 [[I]], [[N]]
; CHECK-NEXT:    br i1 [[CONTINUE]], label [[LOOP]], label [[EXIT_LOOPEXIT:%.*]]
; CHECK:       exit.loopexit:
; CHECK-NEXT:    [[LOOP_ACC_NEXT_LCSSA:%.*]] = phi i32 [ [[LOOP_ACC_NEXT]], [[LOOP]] ]
; CHECK-NEXT:    br label [[EXIT]]
; CHECK:       exit:
; CHECK-NEXT:    [[RESULT:%.*]] = phi i32 [ 0, [[ENTRY:%.*]] ], [ [[LOOP_ACC_NEXT_LCSSA]], [[EXIT_LOOPEXIT]] ]
; CHECK-NEXT:    ret i32 [[RESULT]]
;
entry:
  %tmp5 = icmp sle i32 %n, 0
  br i1 %tmp5, label %exit, label %loop.preheader

loop.preheader:
  br label %loop

loop:
  %loop.acc = phi i32 [ %loop.acc.next, %loop ], [ 0, %loop.preheader ]
  %i = phi i32 [ %i.next, %loop ], [ 0, %loop.preheader ]
  %within.bounds = icmp ult i32 %i, %length
  call void (i1, ...) @llvm.experimental.guard(i1 %within.bounds, i32 9) [ "deopt"() ]

  %i.i64 = zext i32 %i to i64
  %array.i.ptr = getelementptr inbounds i32, i32* %array, i64 %i.i64
  %array.i = load i32, i32* %array.i.ptr, align 4
  %loop.acc.next = add i32 %loop.acc, %array.i

  %i.next = add i32 %i, 1
  %continue = icmp slt i32 %i, %n
  br i1 %continue, label %loop, label %exit

exit:
  %result = phi i32 [ 0, %entry ], [ %loop.acc.next, %loop ]
  ret i32 %result
}

define i32 @signed_loop_0_to_n_preincrement_latch_check_postincrement_guard_check(i32* %array, i32 %length, i32 %n) {
; CHECK-LABEL: @signed_loop_0_to_n_preincrement_latch_check_postincrement_guard_check(
; CHECK-NEXT:  entry:
; CHECK-NEXT:    [[TMP5:%.*]] = icmp sle i32 [[N:%.*]], 0
; CHECK-NEXT:    br i1 [[TMP5]], label [[EXIT:%.*]], label [[LOOP_PREHEADER:%.*]]
; CHECK:       loop.preheader:
; CHECK-NEXT:    [[TMP0:%.*]] = add i32 [[LENGTH:%.*]], -2
; CHECK-NEXT:    [[TMP1:%.*]] = icmp sle i32 [[N]], [[TMP0]]
; CHECK-NEXT:    [[TMP2:%.*]] = icmp ult i32 1, [[LENGTH]]
; CHECK-NEXT:    [[TMP3:%.*]] = and i1 [[TMP2]], [[TMP1]]
; CHECK-NEXT:    br label [[LOOP:%.*]]
; CHECK:       loop:
; CHECK-NEXT:    [[LOOP_ACC:%.*]] = phi i32 [ [[LOOP_ACC_NEXT:%.*]], [[LOOP]] ], [ 0, [[LOOP_PREHEADER]] ]
; CHECK-NEXT:    [[I:%.*]] = phi i32 [ [[I_NEXT:%.*]], [[LOOP]] ], [ 0, [[LOOP_PREHEADER]] ]
; CHECK-NEXT:    [[I_NEXT]] = add i32 [[I]], 1
; CHECK-NEXT:    call void (i1, ...) @llvm.experimental.guard(i1 [[TMP3]], i32 9) [ "deopt"() ]
; CHECK-NEXT:    [[I_I64:%.*]] = zext i32 [[I]] to i64
; CHECK-NEXT:    [[ARRAY_I_PTR:%.*]] = getelementptr inbounds i32, i32* [[ARRAY:%.*]], i64 [[I_I64]]
; CHECK-NEXT:    [[ARRAY_I:%.*]] = load i32, i32* [[ARRAY_I_PTR]], align 4
; CHECK-NEXT:    [[LOOP_ACC_NEXT]] = add i32 [[LOOP_ACC]], [[ARRAY_I]]
; CHECK-NEXT:    [[CONTINUE:%.*]] = icmp slt i32 [[I]], [[N]]
; CHECK-NEXT:    br i1 [[CONTINUE]], label [[LOOP]], label [[EXIT_LOOPEXIT:%.*]]
; CHECK:       exit.loopexit:
; CHECK-NEXT:    [[LOOP_ACC_NEXT_LCSSA:%.*]] = phi i32 [ [[LOOP_ACC_NEXT]], [[LOOP]] ]
; CHECK-NEXT:    br label [[EXIT]]
; CHECK:       exit:
; CHECK-NEXT:    [[RESULT:%.*]] = phi i32 [ 0, [[ENTRY:%.*]] ], [ [[LOOP_ACC_NEXT_LCSSA]], [[EXIT_LOOPEXIT]] ]
; CHECK-NEXT:    ret i32 [[RESULT]]
;
entry:
  %tmp5 = icmp sle i32 %n, 0
  br i1 %tmp5, label %exit, label %loop.preheader

loop.preheader:
  br label %loop

loop:
  %loop.acc = phi i32 [ %loop.acc.next, %loop ], [ 0, %loop.preheader ]
  %i = phi i32 [ %i.next, %loop ], [ 0, %loop.preheader ]

  %i.next = add i32 %i, 1
  %within.bounds = icmp ult i32 %i.next, %length
  call void (i1, ...) @llvm.experimental.guard(i1 %within.bounds, i32 9) [ "deopt"() ]

  %i.i64 = zext i32 %i to i64
  %array.i.ptr = getelementptr inbounds i32, i32* %array, i64 %i.i64
  %array.i = load i32, i32* %array.i.ptr, align 4
  %loop.acc.next = add i32 %loop.acc, %array.i

  %continue = icmp slt i32 %i, %n
  br i1 %continue, label %loop, label %exit

exit:
  %result = phi i32 [ 0, %entry ], [ %loop.acc.next, %loop ]
  ret i32 %result
}

define i32 @signed_loop_0_to_n_sle_latch_offset_ult_check(i32* %array, i32 %length, i32 %n) {
; CHECK-LABEL: @signed_loop_0_to_n_sle_latch_offset_ult_check(
; CHECK-NEXT:  entry:
; CHECK-NEXT:    [[TMP5:%.*]] = icmp sle i32 [[N:%.*]], 0
; CHECK-NEXT:    br i1 [[TMP5]], label [[EXIT:%.*]], label [[LOOP_PREHEADER:%.*]]
; CHECK:       loop.preheader:
; CHECK-NEXT:    [[TMP0:%.*]] = add i32 [[LENGTH:%.*]], -1
; CHECK-NEXT:    [[TMP1:%.*]] = icmp slt i32 [[N]], [[TMP0]]
; CHECK-NEXT:    [[TMP2:%.*]] = icmp ult i32 1, [[LENGTH]]
; CHECK-NEXT:    [[TMP3:%.*]] = and i1 [[TMP2]], [[TMP1]]
; CHECK-NEXT:    br label [[LOOP:%.*]]
; CHECK:       loop:
; CHECK-NEXT:    [[LOOP_ACC:%.*]] = phi i32 [ [[LOOP_ACC_NEXT:%.*]], [[LOOP]] ], [ 0, [[LOOP_PREHEADER]] ]
; CHECK-NEXT:    [[I:%.*]] = phi i32 [ [[I_NEXT:%.*]], [[LOOP]] ], [ 0, [[LOOP_PREHEADER]] ]
; CHECK-NEXT:    call void (i1, ...) @llvm.experimental.guard(i1 [[TMP3]], i32 9) [ "deopt"() ]
; CHECK-NEXT:    [[I_I64:%.*]] = zext i32 [[I]] to i64
; CHECK-NEXT:    [[ARRAY_I_PTR:%.*]] = getelementptr inbounds i32, i32* [[ARRAY:%.*]], i64 [[I_I64]]
; CHECK-NEXT:    [[ARRAY_I:%.*]] = load i32, i32* [[ARRAY_I_PTR]], align 4
; CHECK-NEXT:    [[LOOP_ACC_NEXT]] = add i32 [[LOOP_ACC]], [[ARRAY_I]]
; CHECK-NEXT:    [[I_NEXT]] = add i32 [[I]], 1
; CHECK-NEXT:    [[CONTINUE:%.*]] = icmp sle i32 [[I_NEXT]], [[N]]
; CHECK-NEXT:    br i1 [[CONTINUE]], label [[LOOP]], label [[EXIT_LOOPEXIT:%.*]]
; CHECK:       exit.loopexit:
; CHECK-NEXT:    [[LOOP_ACC_NEXT_LCSSA:%.*]] = phi i32 [ [[LOOP_ACC_NEXT]], [[LOOP]] ]
; CHECK-NEXT:    br label [[EXIT]]
; CHECK:       exit:
; CHECK-NEXT:    [[RESULT:%.*]] = phi i32 [ 0, [[ENTRY:%.*]] ], [ [[LOOP_ACC_NEXT_LCSSA]], [[EXIT_LOOPEXIT]] ]
; CHECK-NEXT:    ret i32 [[RESULT]]
;
entry:
  %tmp5 = icmp sle i32 %n, 0
  br i1 %tmp5, label %exit, label %loop.preheader

loop.preheader:
  br label %loop

loop:
  %loop.acc = phi i32 [ %loop.acc.next, %loop ], [ 0, %loop.preheader ]
  %i = phi i32 [ %i.next, %loop ], [ 0, %loop.preheader ]
  %i.offset = add i32 %i, 1
  %within.bounds = icmp ult i32 %i.offset, %length
  call void (i1, ...) @llvm.experimental.guard(i1 %within.bounds, i32 9) [ "deopt"() ]

  %i.i64 = zext i32 %i to i64
  %array.i.ptr = getelementptr inbounds i32, i32* %array, i64 %i.i64
  %array.i = load i32, i32* %array.i.ptr, align 4
  %loop.acc.next = add i32 %loop.acc, %array.i

  %i.next = add i32 %i, 1
  %continue = icmp sle i32 %i.next, %n
  br i1 %continue, label %loop, label %exit

exit:
  %result = phi i32 [ 0, %entry ], [ %loop.acc.next, %loop ]
  ret i32 %result
}

define i32 @signed_loop_0_to_n_offset_sle_latch_offset_ult_check(i32* %array, i32 %length, i32 %n) {
; CHECK-LABEL: @signed_loop_0_to_n_offset_sle_latch_offset_ult_check(
; CHECK-NEXT:  entry:
; CHECK-NEXT:    [[TMP5:%.*]] = icmp sle i32 [[N:%.*]], 0
; CHECK-NEXT:    br i1 [[TMP5]], label [[EXIT:%.*]], label [[LOOP_PREHEADER:%.*]]
; CHECK:       loop.preheader:
; CHECK-NEXT:    [[TMP0:%.*]] = icmp slt i32 [[N]], [[LENGTH:%.*]]
; CHECK-NEXT:    [[TMP1:%.*]] = icmp ult i32 1, [[LENGTH]]
; CHECK-NEXT:    [[TMP2:%.*]] = and i1 [[TMP1]], [[TMP0]]
; CHECK-NEXT:    br label [[LOOP:%.*]]
; CHECK:       loop:
; CHECK-NEXT:    [[LOOP_ACC:%.*]] = phi i32 [ [[LOOP_ACC_NEXT:%.*]], [[LOOP]] ], [ 0, [[LOOP_PREHEADER]] ]
; CHECK-NEXT:    [[I:%.*]] = phi i32 [ [[I_NEXT:%.*]], [[LOOP]] ], [ 0, [[LOOP_PREHEADER]] ]
; CHECK-NEXT:    call void (i1, ...) @llvm.experimental.guard(i1 [[TMP2]], i32 9) [ "deopt"() ]
; CHECK-NEXT:    [[I_I64:%.*]] = zext i32 [[I]] to i64
; CHECK-NEXT:    [[ARRAY_I_PTR:%.*]] = getelementptr inbounds i32, i32* [[ARRAY:%.*]], i64 [[I_I64]]
; CHECK-NEXT:    [[ARRAY_I:%.*]] = load i32, i32* [[ARRAY_I_PTR]], align 4
; CHECK-NEXT:    [[LOOP_ACC_NEXT]] = add i32 [[LOOP_ACC]], [[ARRAY_I]]
; CHECK-NEXT:    [[I_NEXT]] = add i32 [[I]], 1
; CHECK-NEXT:    [[I_NEXT_OFFSET:%.*]] = add i32 [[I_NEXT]], 1
; CHECK-NEXT:    [[CONTINUE:%.*]] = icmp sle i32 [[I_NEXT_OFFSET]], [[N]]
; CHECK-NEXT:    br i1 [[CONTINUE]], label [[LOOP]], label [[EXIT_LOOPEXIT:%.*]]
; CHECK:       exit.loopexit:
; CHECK-NEXT:    [[LOOP_ACC_NEXT_LCSSA:%.*]] = phi i32 [ [[LOOP_ACC_NEXT]], [[LOOP]] ]
; CHECK-NEXT:    br label [[EXIT]]
; CHECK:       exit:
; CHECK-NEXT:    [[RESULT:%.*]] = phi i32 [ 0, [[ENTRY:%.*]] ], [ [[LOOP_ACC_NEXT_LCSSA]], [[EXIT_LOOPEXIT]] ]
; CHECK-NEXT:    ret i32 [[RESULT]]
;
entry:
  %tmp5 = icmp sle i32 %n, 0
  br i1 %tmp5, label %exit, label %loop.preheader

loop.preheader:
  br label %loop

loop:
  %loop.acc = phi i32 [ %loop.acc.next, %loop ], [ 0, %loop.preheader ]
  %i = phi i32 [ %i.next, %loop ], [ 0, %loop.preheader ]
  %i.offset = add i32 %i, 1
  %within.bounds = icmp ult i32 %i.offset, %length
  call void (i1, ...) @llvm.experimental.guard(i1 %within.bounds, i32 9) [ "deopt"() ]

  %i.i64 = zext i32 %i to i64
  %array.i.ptr = getelementptr inbounds i32, i32* %array, i64 %i.i64
  %array.i = load i32, i32* %array.i.ptr, align 4
  %loop.acc.next = add i32 %loop.acc, %array.i

  %i.next = add i32 %i, 1
  %i.next.offset = add i32 %i.next, 1
  %continue = icmp sle i32 %i.next.offset, %n
  br i1 %continue, label %loop, label %exit

exit:
  %result = phi i32 [ 0, %entry ], [ %loop.acc.next, %loop ]
  ret i32 %result
}

define i32 @unsupported_latch_pred_loop_0_to_n(i32* %array, i32 %length, i32 %n) {
; CHECK-LABEL: @unsupported_latch_pred_loop_0_to_n(
; CHECK-NEXT:  entry:
; CHECK-NEXT:    [[TMP5:%.*]] = icmp sle i32 [[N:%.*]], 0
; CHECK-NEXT:    br i1 [[TMP5]], label [[EXIT:%.*]], label [[LOOP_PREHEADER:%.*]]
; CHECK:       loop.preheader:
; CHECK-NEXT:    br label [[LOOP:%.*]]
; CHECK:       loop:
; CHECK-NEXT:    [[LOOP_ACC:%.*]] = phi i32 [ [[LOOP_ACC_NEXT:%.*]], [[LOOP]] ], [ 0, [[LOOP_PREHEADER]] ]
; CHECK-NEXT:    [[I:%.*]] = phi i32 [ [[I_NEXT:%.*]], [[LOOP]] ], [ 0, [[LOOP_PREHEADER]] ]
; CHECK-NEXT:    [[WITHIN_BOUNDS:%.*]] = icmp ult i32 [[I]], [[LENGTH:%.*]]
; CHECK-NEXT:    call void (i1, ...) @llvm.experimental.guard(i1 [[WITHIN_BOUNDS]], i32 9) [ "deopt"() ]
; CHECK-NEXT:    [[I_I64:%.*]] = zext i32 [[I]] to i64
; CHECK-NEXT:    [[ARRAY_I_PTR:%.*]] = getelementptr inbounds i32, i32* [[ARRAY:%.*]], i64 [[I_I64]]
; CHECK-NEXT:    [[ARRAY_I:%.*]] = load i32, i32* [[ARRAY_I_PTR]], align 4
; CHECK-NEXT:    [[LOOP_ACC_NEXT]] = add i32 [[LOOP_ACC]], [[ARRAY_I]]
; CHECK-NEXT:    [[I_NEXT]] = add nsw i32 [[I]], 1
; CHECK-NEXT:    [[CONTINUE:%.*]] = icmp ne i32 [[I_NEXT]], [[N]]
; CHECK-NEXT:    br i1 [[CONTINUE]], label [[LOOP]], label [[EXIT_LOOPEXIT:%.*]]
; CHECK:       exit.loopexit:
; CHECK-NEXT:    [[LOOP_ACC_NEXT_LCSSA:%.*]] = phi i32 [ [[LOOP_ACC_NEXT]], [[LOOP]] ]
; CHECK-NEXT:    br label [[EXIT]]
; CHECK:       exit:
; CHECK-NEXT:    [[RESULT:%.*]] = phi i32 [ 0, [[ENTRY:%.*]] ], [ [[LOOP_ACC_NEXT_LCSSA]], [[EXIT_LOOPEXIT]] ]
; CHECK-NEXT:    ret i32 [[RESULT]]
;
entry:
  %tmp5 = icmp sle i32 %n, 0
  br i1 %tmp5, label %exit, label %loop.preheader

loop.preheader:
  br label %loop

loop:
  %loop.acc = phi i32 [ %loop.acc.next, %loop ], [ 0, %loop.preheader ]
  %i = phi i32 [ %i.next, %loop ], [ 0, %loop.preheader ]
  %within.bounds = icmp ult i32 %i, %length
  call void (i1, ...) @llvm.experimental.guard(i1 %within.bounds, i32 9) [ "deopt"() ]

  %i.i64 = zext i32 %i to i64
  %array.i.ptr = getelementptr inbounds i32, i32* %array, i64 %i.i64
  %array.i = load i32, i32* %array.i.ptr, align 4
  %loop.acc.next = add i32 %loop.acc, %array.i

  %i.next = add nsw i32 %i, 1
  %continue = icmp ne i32 %i.next, %n
  br i1 %continue, label %loop, label %exit

exit:
  %result = phi i32 [ 0, %entry ], [ %loop.acc.next, %loop ]
  ret i32 %result
}

define i32 @signed_loop_0_to_n_unsupported_iv_step(i32* %array, i32 %length, i32 %n) {
; CHECK-LABEL: @signed_loop_0_to_n_unsupported_iv_step(
; CHECK-NEXT:  entry:
; CHECK-NEXT:    [[TMP5:%.*]] = icmp sle i32 [[N:%.*]], 0
; CHECK-NEXT:    br i1 [[TMP5]], label [[EXIT:%.*]], label [[LOOP_PREHEADER:%.*]]
; CHECK:       loop.preheader:
; CHECK-NEXT:    br label [[LOOP:%.*]]
; CHECK:       loop:
; CHECK-NEXT:    [[LOOP_ACC:%.*]] = phi i32 [ [[LOOP_ACC_NEXT:%.*]], [[LOOP]] ], [ 0, [[LOOP_PREHEADER]] ]
; CHECK-NEXT:    [[I:%.*]] = phi i32 [ [[I_NEXT:%.*]], [[LOOP]] ], [ 0, [[LOOP_PREHEADER]] ]
; CHECK-NEXT:    [[WITHIN_BOUNDS:%.*]] = icmp ult i32 [[I]], [[LENGTH:%.*]]
; CHECK-NEXT:    call void (i1, ...) @llvm.experimental.guard(i1 [[WITHIN_BOUNDS]], i32 9) [ "deopt"() ]
; CHECK-NEXT:    [[I_I64:%.*]] = zext i32 [[I]] to i64
; CHECK-NEXT:    [[ARRAY_I_PTR:%.*]] = getelementptr inbounds i32, i32* [[ARRAY:%.*]], i64 [[I_I64]]
; CHECK-NEXT:    [[ARRAY_I:%.*]] = load i32, i32* [[ARRAY_I_PTR]], align 4
; CHECK-NEXT:    [[LOOP_ACC_NEXT]] = add i32 [[LOOP_ACC]], [[ARRAY_I]]
; CHECK-NEXT:    [[I_NEXT]] = add nsw i32 [[I]], 2
; CHECK-NEXT:    [[CONTINUE:%.*]] = icmp slt i32 [[I_NEXT]], [[N]]
; CHECK-NEXT:    br i1 [[CONTINUE]], label [[LOOP]], label [[EXIT_LOOPEXIT:%.*]]
; CHECK:       exit.loopexit:
; CHECK-NEXT:    [[LOOP_ACC_NEXT_LCSSA:%.*]] = phi i32 [ [[LOOP_ACC_NEXT]], [[LOOP]] ]
; CHECK-NEXT:    br label [[EXIT]]
; CHECK:       exit:
; CHECK-NEXT:    [[RESULT:%.*]] = phi i32 [ 0, [[ENTRY:%.*]] ], [ [[LOOP_ACC_NEXT_LCSSA]], [[EXIT_LOOPEXIT]] ]
; CHECK-NEXT:    ret i32 [[RESULT]]
;
entry:
  %tmp5 = icmp sle i32 %n, 0
  br i1 %tmp5, label %exit, label %loop.preheader

loop.preheader:
  br label %loop

loop:
  %loop.acc = phi i32 [ %loop.acc.next, %loop ], [ 0, %loop.preheader ]
  %i = phi i32 [ %i.next, %loop ], [ 0, %loop.preheader ]
  %within.bounds = icmp ult i32 %i, %length
  call void (i1, ...) @llvm.experimental.guard(i1 %within.bounds, i32 9) [ "deopt"() ]

  %i.i64 = zext i32 %i to i64
  %array.i.ptr = getelementptr inbounds i32, i32* %array, i64 %i.i64
  %array.i = load i32, i32* %array.i.ptr, align 4
  %loop.acc.next = add i32 %loop.acc, %array.i

  %i.next = add nsw i32 %i, 2
  %continue = icmp slt i32 %i.next, %n
  br i1 %continue, label %loop, label %exit

exit:
  %result = phi i32 [ 0, %entry ], [ %loop.acc.next, %loop ]
  ret i32 %result
}

define i32 @signed_loop_0_to_n_equal_iv_range_check(i32* %array, i32 %length, i32 %n) {
; CHECK-LABEL: @signed_loop_0_to_n_equal_iv_range_check(
; CHECK-NEXT:  entry:
; CHECK-NEXT:    [[TMP5:%.*]] = icmp sle i32 [[N:%.*]], 0
; CHECK-NEXT:    br i1 [[TMP5]], label [[EXIT:%.*]], label [[LOOP_PREHEADER:%.*]]
; CHECK:       loop.preheader:
; CHECK-NEXT:    [[TMP0:%.*]] = icmp sle i32 [[N]], [[LENGTH:%.*]]
; CHECK-NEXT:    [[TMP1:%.*]] = icmp ult i32 0, [[LENGTH]]
; CHECK-NEXT:    [[TMP2:%.*]] = and i1 [[TMP1]], [[TMP0]]
; CHECK-NEXT:    br label [[LOOP:%.*]]
; CHECK:       loop:
; CHECK-NEXT:    [[LOOP_ACC:%.*]] = phi i32 [ [[LOOP_ACC_NEXT:%.*]], [[LOOP]] ], [ 0, [[LOOP_PREHEADER]] ]
; CHECK-NEXT:    [[I:%.*]] = phi i32 [ [[I_NEXT:%.*]], [[LOOP]] ], [ 0, [[LOOP_PREHEADER]] ]
; CHECK-NEXT:    [[J:%.*]] = phi i32 [ [[J_NEXT:%.*]], [[LOOP]] ], [ 0, [[LOOP_PREHEADER]] ]
; CHECK-NEXT:    call void (i1, ...) @llvm.experimental.guard(i1 [[TMP2]], i32 9) [ "deopt"() ]
; CHECK-NEXT:    [[I_I64:%.*]] = zext i32 [[I]] to i64
; CHECK-NEXT:    [[ARRAY_I_PTR:%.*]] = getelementptr inbounds i32, i32* [[ARRAY:%.*]], i64 [[I_I64]]
; CHECK-NEXT:    [[ARRAY_I:%.*]] = load i32, i32* [[ARRAY_I_PTR]], align 4
; CHECK-NEXT:    [[LOOP_ACC_NEXT]] = add i32 [[LOOP_ACC]], [[ARRAY_I]]
; CHECK-NEXT:    [[J_NEXT]] = add nsw i32 [[J]], 1
; CHECK-NEXT:    [[I_NEXT]] = add nsw i32 [[I]], 1
; CHECK-NEXT:    [[CONTINUE:%.*]] = icmp slt i32 [[I_NEXT]], [[N]]
; CHECK-NEXT:    br i1 [[CONTINUE]], label [[LOOP]], label [[EXIT_LOOPEXIT:%.*]]
; CHECK:       exit.loopexit:
; CHECK-NEXT:    [[LOOP_ACC_NEXT_LCSSA:%.*]] = phi i32 [ [[LOOP_ACC_NEXT]], [[LOOP]] ]
; CHECK-NEXT:    br label [[EXIT]]
; CHECK:       exit:
; CHECK-NEXT:    [[RESULT:%.*]] = phi i32 [ 0, [[ENTRY:%.*]] ], [ [[LOOP_ACC_NEXT_LCSSA]], [[EXIT_LOOPEXIT]] ]
; CHECK-NEXT:    ret i32 [[RESULT]]
;
entry:
  %tmp5 = icmp sle i32 %n, 0
  br i1 %tmp5, label %exit, label %loop.preheader

loop.preheader:
  br label %loop

loop:
  %loop.acc = phi i32 [ %loop.acc.next, %loop ], [ 0, %loop.preheader ]
  %i = phi i32 [ %i.next, %loop ], [ 0, %loop.preheader ]
  %j = phi i32 [ %j.next, %loop ], [ 0, %loop.preheader ]

  %within.bounds = icmp ult i32 %j, %length
  call void (i1, ...) @llvm.experimental.guard(i1 %within.bounds, i32 9) [ "deopt"() ]

  %i.i64 = zext i32 %i to i64
  %array.i.ptr = getelementptr inbounds i32, i32* %array, i64 %i.i64
  %array.i = load i32, i32* %array.i.ptr, align 4
  %loop.acc.next = add i32 %loop.acc, %array.i

  %j.next = add nsw i32 %j, 1
  %i.next = add nsw i32 %i, 1
  %continue = icmp slt i32 %i.next, %n
  br i1 %continue, label %loop, label %exit

exit:
  %result = phi i32 [ 0, %entry ], [ %loop.acc.next, %loop ]
  ret i32 %result
}

define i32 @signed_loop_start_to_n_offset_iv_range_check(i32* %array, i32 %start.i,
; CHECK-LABEL: @signed_loop_start_to_n_offset_iv_range_check(
; CHECK-NEXT:  entry:
; CHECK-NEXT:    [[TMP5:%.*]] = icmp sle i32 [[N:%.*]], 0
; CHECK-NEXT:    br i1 [[TMP5]], label [[EXIT:%.*]], label [[LOOP_PREHEADER:%.*]]
; CHECK:       loop.preheader:
; CHECK-NEXT:    [[TMP0:%.*]] = add i32 [[LENGTH:%.*]], [[START_I:%.*]]
; CHECK-NEXT:    [[TMP1:%.*]] = sub i32 [[TMP0]], [[START_J:%.*]]
; CHECK-NEXT:    [[TMP2:%.*]] = icmp sle i32 [[N]], [[TMP1]]
; CHECK-NEXT:    [[TMP3:%.*]] = icmp ult i32 [[START_J]], [[LENGTH]]
; CHECK-NEXT:    [[TMP4:%.*]] = and i1 [[TMP3]], [[TMP2]]
; CHECK-NEXT:    br label [[LOOP:%.*]]
; CHECK:       loop:
; CHECK-NEXT:    [[LOOP_ACC:%.*]] = phi i32 [ [[LOOP_ACC_NEXT:%.*]], [[LOOP]] ], [ 0, [[LOOP_PREHEADER]] ]
; CHECK-NEXT:    [[I:%.*]] = phi i32 [ [[I_NEXT:%.*]], [[LOOP]] ], [ [[START_I]], [[LOOP_PREHEADER]] ]
; CHECK-NEXT:    [[J:%.*]] = phi i32 [ [[J_NEXT:%.*]], [[LOOP]] ], [ [[START_J]], [[LOOP_PREHEADER]] ]
; CHECK-NEXT:    call void (i1, ...) @llvm.experimental.guard(i1 [[TMP4]], i32 9) [ "deopt"() ]
; CHECK-NEXT:    [[I_I64:%.*]] = zext i32 [[I]] to i64
; CHECK-NEXT:    [[ARRAY_I_PTR:%.*]] = getelementptr inbounds i32, i32* [[ARRAY:%.*]], i64 [[I_I64]]
; CHECK-NEXT:    [[ARRAY_I:%.*]] = load i32, i32* [[ARRAY_I_PTR]], align 4
; CHECK-NEXT:    [[LOOP_ACC_NEXT]] = add i32 [[LOOP_ACC]], [[ARRAY_I]]
; CHECK-NEXT:    [[J_NEXT]] = add i32 [[J]], 1
; CHECK-NEXT:    [[I_NEXT]] = add i32 [[I]], 1
; CHECK-NEXT:    [[CONTINUE:%.*]] = icmp slt i32 [[I_NEXT]], [[N]]
; CHECK-NEXT:    br i1 [[CONTINUE]], label [[LOOP]], label [[EXIT_LOOPEXIT:%.*]]
; CHECK:       exit.loopexit:
; CHECK-NEXT:    [[LOOP_ACC_NEXT_LCSSA:%.*]] = phi i32 [ [[LOOP_ACC_NEXT]], [[LOOP]] ]
; CHECK-NEXT:    br label [[EXIT]]
; CHECK:       exit:
; CHECK-NEXT:    [[RESULT:%.*]] = phi i32 [ 0, [[ENTRY:%.*]] ], [ [[LOOP_ACC_NEXT_LCSSA]], [[EXIT_LOOPEXIT]] ]
; CHECK-NEXT:    ret i32 [[RESULT]]
;
  i32 %start.j, i32 %length,
  i32 %n) {
entry:
  %tmp5 = icmp sle i32 %n, 0
  br i1 %tmp5, label %exit, label %loop.preheader

loop.preheader:
  br label %loop

loop:
  %loop.acc = phi i32 [ %loop.acc.next, %loop ], [ 0, %loop.preheader ]
  %i = phi i32 [ %i.next, %loop ], [ %start.i, %loop.preheader ]
  %j = phi i32 [ %j.next, %loop ], [ %start.j, %loop.preheader ]

  %within.bounds = icmp ult i32 %j, %length
  call void (i1, ...) @llvm.experimental.guard(i1 %within.bounds, i32 9) [ "deopt"() ]

  %i.i64 = zext i32 %i to i64
  %array.i.ptr = getelementptr inbounds i32, i32* %array, i64 %i.i64
  %array.i = load i32, i32* %array.i.ptr, align 4
  %loop.acc.next = add i32 %loop.acc, %array.i

  %j.next = add i32 %j, 1
  %i.next = add i32 %i, 1
  %continue = icmp slt i32 %i.next, %n
  br i1 %continue, label %loop, label %exit

exit:
  %result = phi i32 [ 0, %entry ], [ %loop.acc.next, %loop ]
  ret i32 %result
}

define i32 @signed_loop_0_to_n_different_iv_types(i32* %array, i16 %length, i32 %n) {
; CHECK-LABEL: @signed_loop_0_to_n_different_iv_types(
; CHECK-NEXT:  entry:
; CHECK-NEXT:    [[TMP5:%.*]] = icmp sle i32 [[N:%.*]], 0
; CHECK-NEXT:    br i1 [[TMP5]], label [[EXIT:%.*]], label [[LOOP_PREHEADER:%.*]]
; CHECK:       loop.preheader:
; CHECK-NEXT:    br label [[LOOP:%.*]]
; CHECK:       loop:
; CHECK-NEXT:    [[LOOP_ACC:%.*]] = phi i32 [ [[LOOP_ACC_NEXT:%.*]], [[LOOP]] ], [ 0, [[LOOP_PREHEADER]] ]
; CHECK-NEXT:    [[I:%.*]] = phi i32 [ [[I_NEXT:%.*]], [[LOOP]] ], [ 0, [[LOOP_PREHEADER]] ]
; CHECK-NEXT:    [[J:%.*]] = phi i16 [ [[J_NEXT:%.*]], [[LOOP]] ], [ 0, [[LOOP_PREHEADER]] ]
; CHECK-NEXT:    [[WITHIN_BOUNDS:%.*]] = icmp ult i16 [[J]], [[LENGTH:%.*]]
; CHECK-NEXT:    call void (i1, ...) @llvm.experimental.guard(i1 [[WITHIN_BOUNDS]], i32 9) [ "deopt"() ]
; CHECK-NEXT:    [[I_I64:%.*]] = zext i32 [[I]] to i64
; CHECK-NEXT:    [[ARRAY_I_PTR:%.*]] = getelementptr inbounds i32, i32* [[ARRAY:%.*]], i64 [[I_I64]]
; CHECK-NEXT:    [[ARRAY_I:%.*]] = load i32, i32* [[ARRAY_I_PTR]], align 4
; CHECK-NEXT:    [[LOOP_ACC_NEXT]] = add i32 [[LOOP_ACC]], [[ARRAY_I]]
; CHECK-NEXT:    [[J_NEXT]] = add i16 [[J]], 1
; CHECK-NEXT:    [[I_NEXT]] = add i32 [[I]], 1
; CHECK-NEXT:    [[CONTINUE:%.*]] = icmp slt i32 [[I_NEXT]], [[N]]
; CHECK-NEXT:    br i1 [[CONTINUE]], label [[LOOP]], label [[EXIT_LOOPEXIT:%.*]]
; CHECK:       exit.loopexit:
; CHECK-NEXT:    [[LOOP_ACC_NEXT_LCSSA:%.*]] = phi i32 [ [[LOOP_ACC_NEXT]], [[LOOP]] ]
; CHECK-NEXT:    br label [[EXIT]]
; CHECK:       exit:
; CHECK-NEXT:    [[RESULT:%.*]] = phi i32 [ 0, [[ENTRY:%.*]] ], [ [[LOOP_ACC_NEXT_LCSSA]], [[EXIT_LOOPEXIT]] ]
; CHECK-NEXT:    ret i32 [[RESULT]]
;
entry:
  %tmp5 = icmp sle i32 %n, 0
  br i1 %tmp5, label %exit, label %loop.preheader

loop.preheader:
  br label %loop

loop:
  %loop.acc = phi i32 [ %loop.acc.next, %loop ], [ 0, %loop.preheader ]
  %i = phi i32 [ %i.next, %loop ], [ 0, %loop.preheader ]
  %j = phi i16 [ %j.next, %loop ], [ 0, %loop.preheader ]

  %within.bounds = icmp ult i16 %j, %length
  call void (i1, ...) @llvm.experimental.guard(i1 %within.bounds, i32 9) [ "deopt"() ]

  %i.i64 = zext i32 %i to i64
  %array.i.ptr = getelementptr inbounds i32, i32* %array, i64 %i.i64
  %array.i = load i32, i32* %array.i.ptr, align 4
  %loop.acc.next = add i32 %loop.acc, %array.i

  %j.next = add i16 %j, 1
  %i.next = add i32 %i, 1
  %continue = icmp slt i32 %i.next, %n
  br i1 %continue, label %loop, label %exit

exit:
  %result = phi i32 [ 0, %entry ], [ %loop.acc.next, %loop ]
  ret i32 %result
}

define i32 @signed_loop_0_to_n_different_iv_strides(i32* %array, i32 %length, i32 %n) {
; CHECK-LABEL: @signed_loop_0_to_n_different_iv_strides(
; CHECK-NEXT:  entry:
; CHECK-NEXT:    [[TMP5:%.*]] = icmp sle i32 [[N:%.*]], 0
; CHECK-NEXT:    br i1 [[TMP5]], label [[EXIT:%.*]], label [[LOOP_PREHEADER:%.*]]
; CHECK:       loop.preheader:
; CHECK-NEXT:    br label [[LOOP:%.*]]
; CHECK:       loop:
; CHECK-NEXT:    [[LOOP_ACC:%.*]] = phi i32 [ [[LOOP_ACC_NEXT:%.*]], [[LOOP]] ], [ 0, [[LOOP_PREHEADER]] ]
; CHECK-NEXT:    [[I:%.*]] = phi i32 [ [[I_NEXT:%.*]], [[LOOP]] ], [ 0, [[LOOP_PREHEADER]] ]
; CHECK-NEXT:    [[J:%.*]] = phi i32 [ [[J_NEXT:%.*]], [[LOOP]] ], [ 0, [[LOOP_PREHEADER]] ]
; CHECK-NEXT:    [[WITHIN_BOUNDS:%.*]] = icmp ult i32 [[J]], [[LENGTH:%.*]]
; CHECK-NEXT:    call void (i1, ...) @llvm.experimental.guard(i1 [[WITHIN_BOUNDS]], i32 9) [ "deopt"() ]
; CHECK-NEXT:    [[I_I64:%.*]] = zext i32 [[I]] to i64
; CHECK-NEXT:    [[ARRAY_I_PTR:%.*]] = getelementptr inbounds i32, i32* [[ARRAY:%.*]], i64 [[I_I64]]
; CHECK-NEXT:    [[ARRAY_I:%.*]] = load i32, i32* [[ARRAY_I_PTR]], align 4
; CHECK-NEXT:    [[LOOP_ACC_NEXT]] = add i32 [[LOOP_ACC]], [[ARRAY_I]]
; CHECK-NEXT:    [[J_NEXT]] = add nsw i32 [[J]], 2
; CHECK-NEXT:    [[I_NEXT]] = add nsw i32 [[I]], 1
; CHECK-NEXT:    [[CONTINUE:%.*]] = icmp slt i32 [[I_NEXT]], [[N]]
; CHECK-NEXT:    br i1 [[CONTINUE]], label [[LOOP]], label [[EXIT_LOOPEXIT:%.*]]
; CHECK:       exit.loopexit:
; CHECK-NEXT:    [[LOOP_ACC_NEXT_LCSSA:%.*]] = phi i32 [ [[LOOP_ACC_NEXT]], [[LOOP]] ]
; CHECK-NEXT:    br label [[EXIT]]
; CHECK:       exit:
; CHECK-NEXT:    [[RESULT:%.*]] = phi i32 [ 0, [[ENTRY:%.*]] ], [ [[LOOP_ACC_NEXT_LCSSA]], [[EXIT_LOOPEXIT]] ]
; CHECK-NEXT:    ret i32 [[RESULT]]
;
entry:
  %tmp5 = icmp sle i32 %n, 0
  br i1 %tmp5, label %exit, label %loop.preheader

loop.preheader:
  br label %loop

loop:
  %loop.acc = phi i32 [ %loop.acc.next, %loop ], [ 0, %loop.preheader ]
  %i = phi i32 [ %i.next, %loop ], [ 0, %loop.preheader ]
  %j = phi i32 [ %j.next, %loop ], [ 0, %loop.preheader ]

  %within.bounds = icmp ult i32 %j, %length
  call void (i1, ...) @llvm.experimental.guard(i1 %within.bounds, i32 9) [ "deopt"() ]

  %i.i64 = zext i32 %i to i64
  %array.i.ptr = getelementptr inbounds i32, i32* %array, i64 %i.i64
  %array.i = load i32, i32* %array.i.ptr, align 4
  %loop.acc.next = add i32 %loop.acc, %array.i

  %j.next = add nsw i32 %j, 2
  %i.next = add nsw i32 %i, 1
  %continue = icmp slt i32 %i.next, %n
  br i1 %continue, label %loop, label %exit

exit:
  %result = phi i32 [ 0, %entry ], [ %loop.acc.next, %loop ]
  ret i32 %result
}

define i32 @two_range_checks(i32* %array.1, i32 %length.1,
; CHECK-LABEL: @two_range_checks(
; CHECK-NEXT:  entry:
; CHECK-NEXT:    [[TMP5:%.*]] = icmp eq i32 [[N:%.*]], 0
; CHECK-NEXT:    br i1 [[TMP5]], label [[EXIT:%.*]], label [[LOOP_PREHEADER:%.*]]
; CHECK:       loop.preheader:
; CHECK-NEXT:    [[TMP0:%.*]] = icmp ule i32 [[N]], [[LENGTH_2:%.*]]
; CHECK-NEXT:    [[TMP1:%.*]] = icmp ult i32 0, [[LENGTH_2]]
; CHECK-NEXT:    [[TMP2:%.*]] = and i1 [[TMP1]], [[TMP0]]
; CHECK-NEXT:    [[TMP3:%.*]] = icmp ule i32 [[N]], [[LENGTH_1:%.*]]
; CHECK-NEXT:    [[TMP4:%.*]] = icmp ult i32 0, [[LENGTH_1]]
; CHECK-NEXT:    [[TMP5:%.*]] = and i1 [[TMP4]], [[TMP3]]
; CHECK-NEXT:    [[TMP6:%.*]] = and i1 [[TMP2]], [[TMP5]]
; CHECK-NEXT:    br label [[LOOP:%.*]]
; CHECK:       loop:
; CHECK-NEXT:    [[LOOP_ACC:%.*]] = phi i32 [ [[LOOP_ACC_NEXT:%.*]], [[LOOP]] ], [ 0, [[LOOP_PREHEADER]] ]
; CHECK-NEXT:    [[I:%.*]] = phi i32 [ [[I_NEXT:%.*]], [[LOOP]] ], [ 0, [[LOOP_PREHEADER]] ]
; CHECK-NEXT:    call void (i1, ...) @llvm.experimental.guard(i1 [[TMP6]], i32 9) [ "deopt"() ]
; CHECK-NEXT:    [[I_I64:%.*]] = zext i32 [[I]] to i64
; CHECK-NEXT:    [[ARRAY_1_I_PTR:%.*]] = getelementptr inbounds i32, i32* [[ARRAY_1:%.*]], i64 [[I_I64]]
; CHECK-NEXT:    [[ARRAY_1_I:%.*]] = load i32, i32* [[ARRAY_1_I_PTR]], align 4
; CHECK-NEXT:    [[LOOP_ACC_1:%.*]] = add i32 [[LOOP_ACC]], [[ARRAY_1_I]]
; CHECK-NEXT:    [[ARRAY_2_I_PTR:%.*]] = getelementptr inbounds i32, i32* [[ARRAY_2:%.*]], i64 [[I_I64]]
; CHECK-NEXT:    [[ARRAY_2_I:%.*]] = load i32, i32* [[ARRAY_2_I_PTR]], align 4
; CHECK-NEXT:    [[LOOP_ACC_NEXT]] = add i32 [[LOOP_ACC_1]], [[ARRAY_2_I]]
; CHECK-NEXT:    [[I_NEXT]] = add nuw i32 [[I]], 1
; CHECK-NEXT:    [[CONTINUE:%.*]] = icmp ult i32 [[I_NEXT]], [[N]]
; CHECK-NEXT:    br i1 [[CONTINUE]], label [[LOOP]], label [[EXIT_LOOPEXIT:%.*]]
; CHECK:       exit.loopexit:
; CHECK-NEXT:    [[LOOP_ACC_NEXT_LCSSA:%.*]] = phi i32 [ [[LOOP_ACC_NEXT]], [[LOOP]] ]
; CHECK-NEXT:    br label [[EXIT]]
; CHECK:       exit:
; CHECK-NEXT:    [[RESULT:%.*]] = phi i32 [ 0, [[ENTRY:%.*]] ], [ [[LOOP_ACC_NEXT_LCSSA]], [[EXIT_LOOPEXIT]] ]
; CHECK-NEXT:    ret i32 [[RESULT]]
;
  i32* %array.2, i32 %length.2, i32 %n) {
entry:
  %tmp5 = icmp eq i32 %n, 0
  br i1 %tmp5, label %exit, label %loop.preheader

loop.preheader:
  br label %loop

loop:
  %loop.acc = phi i32 [ %loop.acc.next, %loop ], [ 0, %loop.preheader ]
  %i = phi i32 [ %i.next, %loop ], [ 0, %loop.preheader ]
  %within.bounds.1 = icmp ult i32 %i, %length.1
  %within.bounds.2 = icmp ult i32 %i, %length.2
  %within.bounds = and i1 %within.bounds.1, %within.bounds.2
  call void (i1, ...) @llvm.experimental.guard(i1 %within.bounds, i32 9) [ "deopt"() ]

  %i.i64 = zext i32 %i to i64
  %array.1.i.ptr = getelementptr inbounds i32, i32* %array.1, i64 %i.i64
  %array.1.i = load i32, i32* %array.1.i.ptr, align 4
  %loop.acc.1 = add i32 %loop.acc, %array.1.i

  %array.2.i.ptr = getelementptr inbounds i32, i32* %array.2, i64 %i.i64
  %array.2.i = load i32, i32* %array.2.i.ptr, align 4
  %loop.acc.next = add i32 %loop.acc.1, %array.2.i

  %i.next = add nuw i32 %i, 1
  %continue = icmp ult i32 %i.next, %n
  br i1 %continue, label %loop, label %exit

exit:
  %result = phi i32 [ 0, %entry ], [ %loop.acc.next, %loop ]
  ret i32 %result
}

define i32 @three_range_checks(i32* %array.1, i32 %length.1,
; CHECK-LABEL: @three_range_checks(
; CHECK-NEXT:  entry:
; CHECK-NEXT:    [[TMP5:%.*]] = icmp eq i32 [[N:%.*]], 0
; CHECK-NEXT:    br i1 [[TMP5]], label [[EXIT:%.*]], label [[LOOP_PREHEADER:%.*]]
; CHECK:       loop.preheader:
; CHECK-NEXT:    [[TMP0:%.*]] = icmp ule i32 [[N]], [[LENGTH_3:%.*]]
; CHECK-NEXT:    [[TMP1:%.*]] = icmp ult i32 0, [[LENGTH_3]]
; CHECK-NEXT:    [[TMP2:%.*]] = and i1 [[TMP1]], [[TMP0]]
; CHECK-NEXT:    [[TMP3:%.*]] = icmp ule i32 [[N]], [[LENGTH_2:%.*]]
; CHECK-NEXT:    [[TMP4:%.*]] = icmp ult i32 0, [[LENGTH_2]]
; CHECK-NEXT:    [[TMP5:%.*]] = and i1 [[TMP4]], [[TMP3]]
; CHECK-NEXT:    [[TMP6:%.*]] = icmp ule i32 [[N]], [[LENGTH_1:%.*]]
; CHECK-NEXT:    [[TMP7:%.*]] = icmp ult i32 0, [[LENGTH_1]]
; CHECK-NEXT:    [[TMP8:%.*]] = and i1 [[TMP7]], [[TMP6]]
; CHECK-NEXT:    [[TMP9:%.*]] = and i1 [[TMP2]], [[TMP5]]
; CHECK-NEXT:    [[TMP10:%.*]] = and i1 [[TMP9]], [[TMP8]]
; CHECK-NEXT:    br label [[LOOP:%.*]]
; CHECK:       loop:
; CHECK-NEXT:    [[LOOP_ACC:%.*]] = phi i32 [ [[LOOP_ACC_NEXT:%.*]], [[LOOP]] ], [ 0, [[LOOP_PREHEADER]] ]
; CHECK-NEXT:    [[I:%.*]] = phi i32 [ [[I_NEXT:%.*]], [[LOOP]] ], [ 0, [[LOOP_PREHEADER]] ]
; CHECK-NEXT:    call void (i1, ...) @llvm.experimental.guard(i1 [[TMP10]], i32 9) [ "deopt"() ]
; CHECK-NEXT:    [[I_I64:%.*]] = zext i32 [[I]] to i64
; CHECK-NEXT:    [[ARRAY_1_I_PTR:%.*]] = getelementptr inbounds i32, i32* [[ARRAY_1:%.*]], i64 [[I_I64]]
; CHECK-NEXT:    [[ARRAY_1_I:%.*]] = load i32, i32* [[ARRAY_1_I_PTR]], align 4
; CHECK-NEXT:    [[LOOP_ACC_1:%.*]] = add i32 [[LOOP_ACC]], [[ARRAY_1_I]]
; CHECK-NEXT:    [[ARRAY_2_I_PTR:%.*]] = getelementptr inbounds i32, i32* [[ARRAY_2:%.*]], i64 [[I_I64]]
; CHECK-NEXT:    [[ARRAY_2_I:%.*]] = load i32, i32* [[ARRAY_2_I_PTR]], align 4
; CHECK-NEXT:    [[LOOP_ACC_2:%.*]] = add i32 [[LOOP_ACC_1]], [[ARRAY_2_I]]
; CHECK-NEXT:    [[ARRAY_3_I_PTR:%.*]] = getelementptr inbounds i32, i32* [[ARRAY_3:%.*]], i64 [[I_I64]]
; CHECK-NEXT:    [[ARRAY_3_I:%.*]] = load i32, i32* [[ARRAY_3_I_PTR]], align 4
; CHECK-NEXT:    [[LOOP_ACC_NEXT]] = add i32 [[LOOP_ACC_2]], [[ARRAY_3_I]]
; CHECK-NEXT:    [[I_NEXT]] = add nuw i32 [[I]], 1
; CHECK-NEXT:    [[CONTINUE:%.*]] = icmp ult i32 [[I_NEXT]], [[N]]
; CHECK-NEXT:    br i1 [[CONTINUE]], label [[LOOP]], label [[EXIT_LOOPEXIT:%.*]]
; CHECK:       exit.loopexit:
; CHECK-NEXT:    [[LOOP_ACC_NEXT_LCSSA:%.*]] = phi i32 [ [[LOOP_ACC_NEXT]], [[LOOP]] ]
; CHECK-NEXT:    br label [[EXIT]]
; CHECK:       exit:
; CHECK-NEXT:    [[RESULT:%.*]] = phi i32 [ 0, [[ENTRY:%.*]] ], [ [[LOOP_ACC_NEXT_LCSSA]], [[EXIT_LOOPEXIT]] ]
; CHECK-NEXT:    ret i32 [[RESULT]]
;
  i32* %array.2, i32 %length.2,
  i32* %array.3, i32 %length.3, i32 %n) {
entry:
  %tmp5 = icmp eq i32 %n, 0
  br i1 %tmp5, label %exit, label %loop.preheader

loop.preheader:
  br label %loop

loop:
  %loop.acc = phi i32 [ %loop.acc.next, %loop ], [ 0, %loop.preheader ]
  %i = phi i32 [ %i.next, %loop ], [ 0, %loop.preheader ]
  %within.bounds.1 = icmp ult i32 %i, %length.1
  %within.bounds.2 = icmp ult i32 %i, %length.2
  %within.bounds.3 = icmp ult i32 %i, %length.3
  %within.bounds.1.and.2 = and i1 %within.bounds.1, %within.bounds.2
  %within.bounds = and i1 %within.bounds.1.and.2, %within.bounds.3
  call void (i1, ...) @llvm.experimental.guard(i1 %within.bounds, i32 9) [ "deopt"() ]

  %i.i64 = zext i32 %i to i64
  %array.1.i.ptr = getelementptr inbounds i32, i32* %array.1, i64 %i.i64
  %array.1.i = load i32, i32* %array.1.i.ptr, align 4
  %loop.acc.1 = add i32 %loop.acc, %array.1.i

  %array.2.i.ptr = getelementptr inbounds i32, i32* %array.2, i64 %i.i64
  %array.2.i = load i32, i32* %array.2.i.ptr, align 4
  %loop.acc.2 = add i32 %loop.acc.1, %array.2.i

  %array.3.i.ptr = getelementptr inbounds i32, i32* %array.3, i64 %i.i64
  %array.3.i = load i32, i32* %array.3.i.ptr, align 4
  %loop.acc.next = add i32 %loop.acc.2, %array.3.i

  %i.next = add nuw i32 %i, 1
  %continue = icmp ult i32 %i.next, %n
  br i1 %continue, label %loop, label %exit

exit:
  %result = phi i32 [ 0, %entry ], [ %loop.acc.next, %loop ]
  ret i32 %result
}

define i32 @three_guards(i32* %array.1, i32 %length.1,
; CHECK-LABEL: @three_guards(
; CHECK-NEXT:  entry:
; CHECK-NEXT:    [[TMP5:%.*]] = icmp eq i32 [[N:%.*]], 0
; CHECK-NEXT:    br i1 [[TMP5]], label [[EXIT:%.*]], label [[LOOP_PREHEADER:%.*]]
; CHECK:       loop.preheader:
; CHECK-NEXT:    [[TMP0:%.*]] = icmp ule i32 [[N]], [[LENGTH_1:%.*]]
; CHECK-NEXT:    [[TMP1:%.*]] = icmp ult i32 0, [[LENGTH_1]]
; CHECK-NEXT:    [[TMP2:%.*]] = and i1 [[TMP1]], [[TMP0]]
; CHECK-NEXT:    [[TMP3:%.*]] = icmp ule i32 [[N]], [[LENGTH_2:%.*]]
; CHECK-NEXT:    [[TMP4:%.*]] = icmp ult i32 0, [[LENGTH_2]]
; CHECK-NEXT:    [[TMP5:%.*]] = and i1 [[TMP4]], [[TMP3]]
; CHECK-NEXT:    [[TMP6:%.*]] = icmp ule i32 [[N]], [[LENGTH_3:%.*]]
; CHECK-NEXT:    [[TMP7:%.*]] = icmp ult i32 0, [[LENGTH_3]]
; CHECK-NEXT:    [[TMP8:%.*]] = and i1 [[TMP7]], [[TMP6]]
; CHECK-NEXT:    br label [[LOOP:%.*]]
; CHECK:       loop:
; CHECK-NEXT:    [[LOOP_ACC:%.*]] = phi i32 [ [[LOOP_ACC_NEXT:%.*]], [[LOOP]] ], [ 0, [[LOOP_PREHEADER]] ]
; CHECK-NEXT:    [[I:%.*]] = phi i32 [ [[I_NEXT:%.*]], [[LOOP]] ], [ 0, [[LOOP_PREHEADER]] ]
; CHECK-NEXT:    call void (i1, ...) @llvm.experimental.guard(i1 [[TMP2]], i32 9) [ "deopt"() ]
; CHECK-NEXT:    [[I_I64:%.*]] = zext i32 [[I]] to i64
; CHECK-NEXT:    [[ARRAY_1_I_PTR:%.*]] = getelementptr inbounds i32, i32* [[ARRAY_1:%.*]], i64 [[I_I64]]
; CHECK-NEXT:    [[ARRAY_1_I:%.*]] = load i32, i32* [[ARRAY_1_I_PTR]], align 4
; CHECK-NEXT:    [[LOOP_ACC_1:%.*]] = add i32 [[LOOP_ACC]], [[ARRAY_1_I]]
; CHECK-NEXT:    call void (i1, ...) @llvm.experimental.guard(i1 [[TMP5]], i32 9) [ "deopt"() ]
; CHECK-NEXT:    [[ARRAY_2_I_PTR:%.*]] = getelementptr inbounds i32, i32* [[ARRAY_2:%.*]], i64 [[I_I64]]
; CHECK-NEXT:    [[ARRAY_2_I:%.*]] = load i32, i32* [[ARRAY_2_I_PTR]], align 4
; CHECK-NEXT:    [[LOOP_ACC_2:%.*]] = add i32 [[LOOP_ACC_1]], [[ARRAY_2_I]]
; CHECK-NEXT:    call void (i1, ...) @llvm.experimental.guard(i1 [[TMP8]], i32 9) [ "deopt"() ]
; CHECK-NEXT:    [[ARRAY_3_I_PTR:%.*]] = getelementptr inbounds i32, i32* [[ARRAY_3:%.*]], i64 [[I_I64]]
; CHECK-NEXT:    [[ARRAY_3_I:%.*]] = load i32, i32* [[ARRAY_3_I_PTR]], align 4
; CHECK-NEXT:    [[LOOP_ACC_NEXT]] = add i32 [[LOOP_ACC_2]], [[ARRAY_3_I]]
; CHECK-NEXT:    [[I_NEXT]] = add nuw i32 [[I]], 1
; CHECK-NEXT:    [[CONTINUE:%.*]] = icmp ult i32 [[I_NEXT]], [[N]]
; CHECK-NEXT:    br i1 [[CONTINUE]], label [[LOOP]], label [[EXIT_LOOPEXIT:%.*]]
; CHECK:       exit.loopexit:
; CHECK-NEXT:    [[LOOP_ACC_NEXT_LCSSA:%.*]] = phi i32 [ [[LOOP_ACC_NEXT]], [[LOOP]] ]
; CHECK-NEXT:    br label [[EXIT]]
; CHECK:       exit:
; CHECK-NEXT:    [[RESULT:%.*]] = phi i32 [ 0, [[ENTRY:%.*]] ], [ [[LOOP_ACC_NEXT_LCSSA]], [[EXIT_LOOPEXIT]] ]
; CHECK-NEXT:    ret i32 [[RESULT]]
;
  i32* %array.2, i32 %length.2,
  i32* %array.3, i32 %length.3, i32 %n) {
entry:
  %tmp5 = icmp eq i32 %n, 0
  br i1 %tmp5, label %exit, label %loop.preheader

loop.preheader:
  br label %loop

loop:

  %loop.acc = phi i32 [ %loop.acc.next, %loop ], [ 0, %loop.preheader ]
  %i = phi i32 [ %i.next, %loop ], [ 0, %loop.preheader ]

  %within.bounds.1 = icmp ult i32 %i, %length.1
  call void (i1, ...) @llvm.experimental.guard(i1 %within.bounds.1, i32 9) [ "deopt"() ]

  %i.i64 = zext i32 %i to i64
  %array.1.i.ptr = getelementptr inbounds i32, i32* %array.1, i64 %i.i64
  %array.1.i = load i32, i32* %array.1.i.ptr, align 4
  %loop.acc.1 = add i32 %loop.acc, %array.1.i

  %within.bounds.2 = icmp ult i32 %i, %length.2
  call void (i1, ...) @llvm.experimental.guard(i1 %within.bounds.2, i32 9) [ "deopt"() ]

  %array.2.i.ptr = getelementptr inbounds i32, i32* %array.2, i64 %i.i64
  %array.2.i = load i32, i32* %array.2.i.ptr, align 4
  %loop.acc.2 = add i32 %loop.acc.1, %array.2.i

  %within.bounds.3 = icmp ult i32 %i, %length.3
  call void (i1, ...) @llvm.experimental.guard(i1 %within.bounds.3, i32 9) [ "deopt"() ]

  %array.3.i.ptr = getelementptr inbounds i32, i32* %array.3, i64 %i.i64
  %array.3.i = load i32, i32* %array.3.i.ptr, align 4
  %loop.acc.next = add i32 %loop.acc.2, %array.3.i

  %i.next = add nuw i32 %i, 1
  %continue = icmp ult i32 %i.next, %n
  br i1 %continue, label %loop, label %exit

exit:
  %result = phi i32 [ 0, %entry ], [ %loop.acc.next, %loop ]
  ret i32 %result
}

define i32 @unsigned_loop_0_to_n_unrelated_condition(i32* %array, i32 %length, i32 %n, i32 %x) {
; CHECK-LABEL: @unsigned_loop_0_to_n_unrelated_condition(
; CHECK-NEXT:  entry:
; CHECK-NEXT:    [[TMP5:%.*]] = icmp eq i32 [[N:%.*]], 0
; CHECK-NEXT:    br i1 [[TMP5]], label [[EXIT:%.*]], label [[LOOP_PREHEADER:%.*]]
; CHECK:       loop.preheader:
; CHECK-NEXT:    [[TMP0:%.*]] = icmp ule i32 [[N]], [[LENGTH:%.*]]
; CHECK-NEXT:    [[TMP1:%.*]] = icmp ult i32 0, [[LENGTH]]
; CHECK-NEXT:    [[TMP2:%.*]] = and i1 [[TMP1]], [[TMP0]]
; CHECK-NEXT:    br label [[LOOP:%.*]]
; CHECK:       loop:
; CHECK-NEXT:    [[LOOP_ACC:%.*]] = phi i32 [ [[LOOP_ACC_NEXT:%.*]], [[LOOP]] ], [ 0, [[LOOP_PREHEADER]] ]
; CHECK-NEXT:    [[I:%.*]] = phi i32 [ [[I_NEXT:%.*]], [[LOOP]] ], [ 0, [[LOOP_PREHEADER]] ]
; CHECK-NEXT:    [[UNRELATED_COND:%.*]] = icmp ult i32 [[X:%.*]], [[LENGTH]]
; CHECK-NEXT:    [[TMP3:%.*]] = and i1 [[UNRELATED_COND]], [[TMP2]]
; CHECK-NEXT:    call void (i1, ...) @llvm.experimental.guard(i1 [[TMP3]], i32 9) [ "deopt"() ]
; CHECK-NEXT:    [[I_I64:%.*]] = zext i32 [[I]] to i64
; CHECK-NEXT:    [[ARRAY_I_PTR:%.*]] = getelementptr inbounds i32, i32* [[ARRAY:%.*]], i64 [[I_I64]]
; CHECK-NEXT:    [[ARRAY_I:%.*]] = load i32, i32* [[ARRAY_I_PTR]], align 4
; CHECK-NEXT:    [[LOOP_ACC_NEXT]] = add i32 [[LOOP_ACC]], [[ARRAY_I]]
; CHECK-NEXT:    [[I_NEXT]] = add nuw i32 [[I]], 1
; CHECK-NEXT:    [[CONTINUE:%.*]] = icmp ult i32 [[I_NEXT]], [[N]]
; CHECK-NEXT:    br i1 [[CONTINUE]], label [[LOOP]], label [[EXIT_LOOPEXIT:%.*]]
; CHECK:       exit.loopexit:
; CHECK-NEXT:    [[LOOP_ACC_NEXT_LCSSA:%.*]] = phi i32 [ [[LOOP_ACC_NEXT]], [[LOOP]] ]
; CHECK-NEXT:    br label [[EXIT]]
; CHECK:       exit:
; CHECK-NEXT:    [[RESULT:%.*]] = phi i32 [ 0, [[ENTRY:%.*]] ], [ [[LOOP_ACC_NEXT_LCSSA]], [[EXIT_LOOPEXIT]] ]
; CHECK-NEXT:    ret i32 [[RESULT]]
;
entry:
  %tmp5 = icmp eq i32 %n, 0
  br i1 %tmp5, label %exit, label %loop.preheader

loop.preheader:
  br label %loop

loop:
  %loop.acc = phi i32 [ %loop.acc.next, %loop ], [ 0, %loop.preheader ]
  %i = phi i32 [ %i.next, %loop ], [ 0, %loop.preheader ]
  %within.bounds = icmp ult i32 %i, %length
  %unrelated.cond = icmp ult i32 %x, %length
  %guard.cond = and i1 %within.bounds, %unrelated.cond
  call void (i1, ...) @llvm.experimental.guard(i1 %guard.cond, i32 9) [ "deopt"() ]

  %i.i64 = zext i32 %i to i64
  %array.i.ptr = getelementptr inbounds i32, i32* %array, i64 %i.i64
  %array.i = load i32, i32* %array.i.ptr, align 4
  %loop.acc.next = add i32 %loop.acc, %array.i

  %i.next = add nuw i32 %i, 1
  %continue = icmp ult i32 %i.next, %n
  br i1 %continue, label %loop, label %exit

exit:
  %result = phi i32 [ 0, %entry ], [ %loop.acc.next, %loop ]
  ret i32 %result
}

; Don't change the guard condition if there were no widened subconditions
define i32 @test_no_widened_conditions(i32* %array, i32 %length, i32 %n, i32 %x1, i32 %x2, i32 %x3) {
; CHECK-LABEL: @test_no_widened_conditions(
; CHECK-NEXT:  entry:
; CHECK-NEXT:    [[TMP5:%.*]] = icmp eq i32 [[N:%.*]], 0
; CHECK-NEXT:    br i1 [[TMP5]], label [[EXIT:%.*]], label [[LOOP_PREHEADER:%.*]]
; CHECK:       loop.preheader:
; CHECK-NEXT:    br label [[LOOP:%.*]]
; CHECK:       loop:
; CHECK-NEXT:    [[LOOP_ACC:%.*]] = phi i32 [ [[LOOP_ACC_NEXT:%.*]], [[LOOP]] ], [ 0, [[LOOP_PREHEADER]] ]
; CHECK-NEXT:    [[I:%.*]] = phi i32 [ [[I_NEXT:%.*]], [[LOOP]] ], [ 0, [[LOOP_PREHEADER]] ]
; CHECK-NEXT:    [[UNRELATED_COND_1:%.*]] = icmp eq i32 [[X1:%.*]], [[I]]
; CHECK-NEXT:    [[UNRELATED_COND_2:%.*]] = icmp eq i32 [[X2:%.*]], [[I]]
; CHECK-NEXT:    [[UNRELATED_COND_3:%.*]] = icmp eq i32 [[X3:%.*]], [[I]]
; CHECK-NEXT:    [[UNRELATED_COND_AND_1:%.*]] = and i1 [[UNRELATED_COND_1]], [[UNRELATED_COND_2]]
; CHECK-NEXT:    [[GUARD_COND:%.*]] = and i1 [[UNRELATED_COND_AND_1]], [[UNRELATED_COND_3]]
; CHECK-NEXT:    call void (i1, ...) @llvm.experimental.guard(i1 [[GUARD_COND]], i32 9) [ "deopt"() ]
; CHECK-NEXT:    [[I_I64:%.*]] = zext i32 [[I]] to i64
; CHECK-NEXT:    [[ARRAY_I_PTR:%.*]] = getelementptr inbounds i32, i32* [[ARRAY:%.*]], i64 [[I_I64]]
; CHECK-NEXT:    [[ARRAY_I:%.*]] = load i32, i32* [[ARRAY_I_PTR]], align 4
; CHECK-NEXT:    [[LOOP_ACC_NEXT]] = add i32 [[LOOP_ACC]], [[ARRAY_I]]
; CHECK-NEXT:    [[I_NEXT]] = add nuw i32 [[I]], 1
; CHECK-NEXT:    [[CONTINUE:%.*]] = icmp ult i32 [[I_NEXT]], [[N]]
; CHECK-NEXT:    br i1 [[CONTINUE]], label [[LOOP]], label [[EXIT_LOOPEXIT:%.*]]
; CHECK:       exit.loopexit:
; CHECK-NEXT:    [[LOOP_ACC_NEXT_LCSSA:%.*]] = phi i32 [ [[LOOP_ACC_NEXT]], [[LOOP]] ]
; CHECK-NEXT:    br label [[EXIT]]
; CHECK:       exit:
; CHECK-NEXT:    [[RESULT:%.*]] = phi i32 [ 0, [[ENTRY:%.*]] ], [ [[LOOP_ACC_NEXT_LCSSA]], [[EXIT_LOOPEXIT]] ]
; CHECK-NEXT:    ret i32 [[RESULT]]
;
entry:
  %tmp5 = icmp eq i32 %n, 0
  br i1 %tmp5, label %exit, label %loop.preheader

loop.preheader:
  br label %loop

loop:
  %loop.acc = phi i32 [ %loop.acc.next, %loop ], [ 0, %loop.preheader ]
  %i = phi i32 [ %i.next, %loop ], [ 0, %loop.preheader ]
  %unrelated.cond.1 = icmp eq i32 %x1, %i
  %unrelated.cond.2 = icmp eq i32 %x2, %i
  %unrelated.cond.3 = icmp eq i32 %x3, %i
  %unrelated.cond.and.1 = and i1 %unrelated.cond.1, %unrelated.cond.2
  %guard.cond = and i1 %unrelated.cond.and.1, %unrelated.cond.3

  call void (i1, ...) @llvm.experimental.guard(i1 %guard.cond, i32 9) [ "deopt"() ]

  %i.i64 = zext i32 %i to i64
  %array.i.ptr = getelementptr inbounds i32, i32* %array, i64 %i.i64
  %array.i = load i32, i32* %array.i.ptr, align 4
  %loop.acc.next = add i32 %loop.acc, %array.i

  %i.next = add nuw i32 %i, 1
  %continue = icmp ult i32 %i.next, %n
  br i1 %continue, label %loop, label %exit

exit:
  %result = phi i32 [ 0, %entry ], [ %loop.acc.next, %loop ]
  ret i32 %result
}

define i32 @signed_loop_start_to_n_loop_variant_bound(i32* %array, i32 %x, i32 %start, i32 %n) {
; CHECK-LABEL: @signed_loop_start_to_n_loop_variant_bound(
; CHECK-NEXT:  entry:
; CHECK-NEXT:    [[TMP5:%.*]] = icmp sle i32 [[N:%.*]], 0
; CHECK-NEXT:    br i1 [[TMP5]], label [[EXIT:%.*]], label [[LOOP_PREHEADER:%.*]]
; CHECK:       loop.preheader:
; CHECK-NEXT:    br label [[LOOP:%.*]]
; CHECK:       loop:
; CHECK-NEXT:    [[LOOP_ACC:%.*]] = phi i32 [ [[LOOP_ACC_NEXT:%.*]], [[LOOP]] ], [ 0, [[LOOP_PREHEADER]] ]
; CHECK-NEXT:    [[I:%.*]] = phi i32 [ [[I_NEXT:%.*]], [[LOOP]] ], [ [[START:%.*]], [[LOOP_PREHEADER]] ]
; CHECK-NEXT:    [[BOUND:%.*]] = add i32 [[I]], [[X:%.*]]
; CHECK-NEXT:    [[WITHIN_BOUNDS:%.*]] = icmp ult i32 [[I]], [[BOUND]]
; CHECK-NEXT:    call void (i1, ...) @llvm.experimental.guard(i1 [[WITHIN_BOUNDS]], i32 9) [ "deopt"() ]
; CHECK-NEXT:    [[I_I64:%.*]] = zext i32 [[I]] to i64
; CHECK-NEXT:    [[ARRAY_I_PTR:%.*]] = getelementptr inbounds i32, i32* [[ARRAY:%.*]], i64 [[I_I64]]
; CHECK-NEXT:    [[ARRAY_I:%.*]] = load i32, i32* [[ARRAY_I_PTR]], align 4
; CHECK-NEXT:    [[LOOP_ACC_NEXT]] = add i32 [[LOOP_ACC]], [[ARRAY_I]]
; CHECK-NEXT:    [[I_NEXT]] = add nsw i32 [[I]], 1
; CHECK-NEXT:    [[CONTINUE:%.*]] = icmp slt i32 [[I_NEXT]], [[N]]
; CHECK-NEXT:    br i1 [[CONTINUE]], label [[LOOP]], label [[EXIT_LOOPEXIT:%.*]]
; CHECK:       exit.loopexit:
; CHECK-NEXT:    [[LOOP_ACC_NEXT_LCSSA:%.*]] = phi i32 [ [[LOOP_ACC_NEXT]], [[LOOP]] ]
; CHECK-NEXT:    br label [[EXIT]]
; CHECK:       exit:
; CHECK-NEXT:    [[RESULT:%.*]] = phi i32 [ 0, [[ENTRY:%.*]] ], [ [[LOOP_ACC_NEXT_LCSSA]], [[EXIT_LOOPEXIT]] ]
; CHECK-NEXT:    ret i32 [[RESULT]]
;
entry:
  %tmp5 = icmp sle i32 %n, 0
  br i1 %tmp5, label %exit, label %loop.preheader

loop.preheader:
  br label %loop

loop:
  %loop.acc = phi i32 [ %loop.acc.next, %loop ], [ 0, %loop.preheader ]
  %i = phi i32 [ %i.next, %loop ], [ %start, %loop.preheader ]
  %bound = add i32 %i, %x
  %within.bounds = icmp ult i32 %i, %bound
  call void (i1, ...) @llvm.experimental.guard(i1 %within.bounds, i32 9) [ "deopt"() ]

  %i.i64 = zext i32 %i to i64
  %array.i.ptr = getelementptr inbounds i32, i32* %array, i64 %i.i64
  %array.i = load i32, i32* %array.i.ptr, align 4
  %loop.acc.next = add i32 %loop.acc, %array.i

  %i.next = add nsw i32 %i, 1
  %continue = icmp slt i32 %i.next, %n
  br i1 %continue, label %loop, label %exit

exit:
  %result = phi i32 [ 0, %entry ], [ %loop.acc.next, %loop ]
  ret i32 %result
}

define i32 @signed_loop_start_to_n_non_monotonic_predicate(i32* %array, i32 %x, i32 %start, i32 %n) {
; CHECK-LABEL: @signed_loop_start_to_n_non_monotonic_predicate(
; CHECK-NEXT:  entry:
; CHECK-NEXT:    [[TMP5:%.*]] = icmp sle i32 [[N:%.*]], 0
; CHECK-NEXT:    br i1 [[TMP5]], label [[EXIT:%.*]], label [[LOOP_PREHEADER:%.*]]
; CHECK:       loop.preheader:
; CHECK-NEXT:    br label [[LOOP:%.*]]
; CHECK:       loop:
; CHECK-NEXT:    [[LOOP_ACC:%.*]] = phi i32 [ [[LOOP_ACC_NEXT:%.*]], [[LOOP]] ], [ 0, [[LOOP_PREHEADER]] ]
; CHECK-NEXT:    [[I:%.*]] = phi i32 [ [[I_NEXT:%.*]], [[LOOP]] ], [ [[START:%.*]], [[LOOP_PREHEADER]] ]
; CHECK-NEXT:    [[GUARD_COND:%.*]] = icmp eq i32 [[I]], [[X:%.*]]
; CHECK-NEXT:    call void (i1, ...) @llvm.experimental.guard(i1 [[GUARD_COND]], i32 9) [ "deopt"() ]
; CHECK-NEXT:    [[I_I64:%.*]] = zext i32 [[I]] to i64
; CHECK-NEXT:    [[ARRAY_I_PTR:%.*]] = getelementptr inbounds i32, i32* [[ARRAY:%.*]], i64 [[I_I64]]
; CHECK-NEXT:    [[ARRAY_I:%.*]] = load i32, i32* [[ARRAY_I_PTR]], align 4
; CHECK-NEXT:    [[LOOP_ACC_NEXT]] = add i32 [[LOOP_ACC]], [[ARRAY_I]]
; CHECK-NEXT:    [[I_NEXT]] = add nsw i32 [[I]], 1
; CHECK-NEXT:    [[CONTINUE:%.*]] = icmp slt i32 [[I_NEXT]], [[N]]
; CHECK-NEXT:    br i1 [[CONTINUE]], label [[LOOP]], label [[EXIT_LOOPEXIT:%.*]]
; CHECK:       exit.loopexit:
; CHECK-NEXT:    [[LOOP_ACC_NEXT_LCSSA:%.*]] = phi i32 [ [[LOOP_ACC_NEXT]], [[LOOP]] ]
; CHECK-NEXT:    br label [[EXIT]]
; CHECK:       exit:
; CHECK-NEXT:    [[RESULT:%.*]] = phi i32 [ 0, [[ENTRY:%.*]] ], [ [[LOOP_ACC_NEXT_LCSSA]], [[EXIT_LOOPEXIT]] ]
; CHECK-NEXT:    ret i32 [[RESULT]]
;
entry:
  %tmp5 = icmp sle i32 %n, 0
  br i1 %tmp5, label %exit, label %loop.preheader

loop.preheader:
  br label %loop

loop:
  %loop.acc = phi i32 [ %loop.acc.next, %loop ], [ 0, %loop.preheader ]
  %i = phi i32 [ %i.next, %loop ], [ %start, %loop.preheader ]
  %guard.cond = icmp eq i32 %i, %x
  call void (i1, ...) @llvm.experimental.guard(i1 %guard.cond, i32 9) [ "deopt"() ]

  %i.i64 = zext i32 %i to i64
  %array.i.ptr = getelementptr inbounds i32, i32* %array, i64 %i.i64
  %array.i = load i32, i32* %array.i.ptr, align 4
  %loop.acc.next = add i32 %loop.acc, %array.i

  %i.next = add nsw i32 %i, 1
  %continue = icmp slt i32 %i.next, %n
  br i1 %continue, label %loop, label %exit

exit:
  %result = phi i32 [ 0, %entry ], [ %loop.acc.next, %loop ]
  ret i32 %result
}

define i32 @unsigned_loop_0_to_n_hoist_length(i32* %array, i16 %length.i16, i32 %n) {
; CHECK-LABEL: @unsigned_loop_0_to_n_hoist_length(
; CHECK-NEXT:  entry:
; CHECK-NEXT:    [[TMP5:%.*]] = icmp eq i32 [[N:%.*]], 0
; CHECK-NEXT:    br i1 [[TMP5]], label [[EXIT:%.*]], label [[LOOP_PREHEADER:%.*]]
; CHECK:       loop.preheader:
; CHECK-NEXT:    [[TMP0:%.*]] = zext i16 [[LENGTH_I16:%.*]] to i32
; CHECK-NEXT:    [[TMP1:%.*]] = icmp ule i32 [[N]], [[TMP0]]
; CHECK-NEXT:    [[TMP2:%.*]] = icmp ult i32 0, [[TMP0]]
; CHECK-NEXT:    [[TMP3:%.*]] = and i1 [[TMP2]], [[TMP1]]
; CHECK-NEXT:    br label [[LOOP:%.*]]
; CHECK:       loop:
; CHECK-NEXT:    [[LOOP_ACC:%.*]] = phi i32 [ [[LOOP_ACC_NEXT:%.*]], [[LOOP]] ], [ 0, [[LOOP_PREHEADER]] ]
; CHECK-NEXT:    [[I:%.*]] = phi i32 [ [[I_NEXT:%.*]], [[LOOP]] ], [ 0, [[LOOP_PREHEADER]] ]
; CHECK-NEXT:    call void (i1, ...) @llvm.experimental.guard(i1 [[TMP3]], i32 9) [ "deopt"() ]
; CHECK-NEXT:    [[I_I64:%.*]] = zext i32 [[I]] to i64
; CHECK-NEXT:    [[ARRAY_I_PTR:%.*]] = getelementptr inbounds i32, i32* [[ARRAY:%.*]], i64 [[I_I64]]
; CHECK-NEXT:    [[ARRAY_I:%.*]] = load i32, i32* [[ARRAY_I_PTR]], align 4
; CHECK-NEXT:    [[LOOP_ACC_NEXT]] = add i32 [[LOOP_ACC]], [[ARRAY_I]]
; CHECK-NEXT:    [[I_NEXT]] = add nuw i32 [[I]], 1
; CHECK-NEXT:    [[CONTINUE:%.*]] = icmp ult i32 [[I_NEXT]], [[N]]
; CHECK-NEXT:    br i1 [[CONTINUE]], label [[LOOP]], label [[EXIT_LOOPEXIT:%.*]]
; CHECK:       exit.loopexit:
; CHECK-NEXT:    [[LOOP_ACC_NEXT_LCSSA:%.*]] = phi i32 [ [[LOOP_ACC_NEXT]], [[LOOP]] ]
; CHECK-NEXT:    br label [[EXIT]]
; CHECK:       exit:
; CHECK-NEXT:    [[RESULT:%.*]] = phi i32 [ 0, [[ENTRY:%.*]] ], [ [[LOOP_ACC_NEXT_LCSSA]], [[EXIT_LOOPEXIT]] ]
; CHECK-NEXT:    ret i32 [[RESULT]]
;
entry:
  %tmp5 = icmp eq i32 %n, 0
  br i1 %tmp5, label %exit, label %loop.preheader

loop.preheader:
  br label %loop

loop:
  %loop.acc = phi i32 [ %loop.acc.next, %loop ], [ 0, %loop.preheader ]
  %i = phi i32 [ %i.next, %loop ], [ 0, %loop.preheader ]
  %length = zext i16 %length.i16 to i32
  %within.bounds = icmp ult i32 %i, %length
  call void (i1, ...) @llvm.experimental.guard(i1 %within.bounds, i32 9) [ "deopt"() ]

  %i.i64 = zext i32 %i to i64
  %array.i.ptr = getelementptr inbounds i32, i32* %array, i64 %i.i64
  %array.i = load i32, i32* %array.i.ptr, align 4
  %loop.acc.next = add i32 %loop.acc, %array.i

  %i.next = add nuw i32 %i, 1
  %continue = icmp ult i32 %i.next, %n
  br i1 %continue, label %loop, label %exit

exit:
  %result = phi i32 [ 0, %entry ], [ %loop.acc.next, %loop ]
  ret i32 %result
}

define i32 @unsigned_loop_0_to_n_cant_hoist_length(i32* %array, i32 %length, i32 %divider, i32 %n) {
; CHECK-LABEL: @unsigned_loop_0_to_n_cant_hoist_length(
; CHECK-NEXT:  entry:
; CHECK-NEXT:    [[TMP5:%.*]] = icmp eq i32 [[N:%.*]], 0
; CHECK-NEXT:    br i1 [[TMP5]], label [[EXIT:%.*]], label [[LOOP_PREHEADER:%.*]]
; CHECK:       loop.preheader:
; CHECK-NEXT:    br label [[LOOP:%.*]]
; CHECK:       loop:
; CHECK-NEXT:    [[LOOP_ACC:%.*]] = phi i32 [ [[LOOP_ACC_NEXT:%.*]], [[LOOP]] ], [ 0, [[LOOP_PREHEADER]] ]
; CHECK-NEXT:    [[I:%.*]] = phi i32 [ [[I_NEXT:%.*]], [[LOOP]] ], [ 0, [[LOOP_PREHEADER]] ]
; CHECK-NEXT:    [[LENGTH_UDIV:%.*]] = udiv i32 [[LENGTH:%.*]], [[DIVIDER:%.*]]
; CHECK-NEXT:    [[TMP0:%.*]] = icmp ule i32 [[N]], [[LENGTH_UDIV]]
; CHECK-NEXT:    [[TMP1:%.*]] = icmp ult i32 0, [[LENGTH_UDIV]]
; CHECK-NEXT:    [[TMP2:%.*]] = and i1 [[TMP1]], [[TMP0]]
; CHECK-NEXT:    call void (i1, ...) @llvm.experimental.guard(i1 [[TMP2]], i32 9) [ "deopt"() ]
; CHECK-NEXT:    [[I_I64:%.*]] = zext i32 [[I]] to i64
; CHECK-NEXT:    [[ARRAY_I_PTR:%.*]] = getelementptr inbounds i32, i32* [[ARRAY:%.*]], i64 [[I_I64]]
; CHECK-NEXT:    [[ARRAY_I:%.*]] = load i32, i32* [[ARRAY_I_PTR]], align 4
; CHECK-NEXT:    [[LOOP_ACC_NEXT]] = add i32 [[LOOP_ACC]], [[ARRAY_I]]
; CHECK-NEXT:    [[I_NEXT]] = add nuw i32 [[I]], 1
; CHECK-NEXT:    [[CONTINUE:%.*]] = icmp ult i32 [[I_NEXT]], [[N]]
; CHECK-NEXT:    br i1 [[CONTINUE]], label [[LOOP]], label [[EXIT_LOOPEXIT:%.*]]
; CHECK:       exit.loopexit:
; CHECK-NEXT:    [[LOOP_ACC_NEXT_LCSSA:%.*]] = phi i32 [ [[LOOP_ACC_NEXT]], [[LOOP]] ]
; CHECK-NEXT:    br label [[EXIT]]
; CHECK:       exit:
; CHECK-NEXT:    [[RESULT:%.*]] = phi i32 [ 0, [[ENTRY:%.*]] ], [ [[LOOP_ACC_NEXT_LCSSA]], [[EXIT_LOOPEXIT]] ]
; CHECK-NEXT:    ret i32 [[RESULT]]
;
entry:
  %tmp5 = icmp eq i32 %n, 0
  br i1 %tmp5, label %exit, label %loop.preheader

loop.preheader:
  br label %loop

loop:
  %loop.acc = phi i32 [ %loop.acc.next, %loop ], [ 0, %loop.preheader ]
  %i = phi i32 [ %i.next, %loop ], [ 0, %loop.preheader ]
  %length.udiv = udiv i32 %length, %divider
  %within.bounds = icmp ult i32 %i, %length.udiv
  call void (i1, ...) @llvm.experimental.guard(i1 %within.bounds, i32 9) [ "deopt"() ]

  %i.i64 = zext i32 %i to i64
  %array.i.ptr = getelementptr inbounds i32, i32* %array, i64 %i.i64
  %array.i = load i32, i32* %array.i.ptr, align 4
  %loop.acc.next = add i32 %loop.acc, %array.i

  %i.next = add nuw i32 %i, 1
  %continue = icmp ult i32 %i.next, %n
  br i1 %continue, label %loop, label %exit

exit:
  %result = phi i32 [ 0, %entry ], [ %loop.acc.next, %loop ]
  ret i32 %result
}


; This is a case where the length information tells us that the guard
; must trigger on some iteration.
define i32 @provably_taken(i32* %array, i32* %length.ptr) {
; CHECK-LABEL: @provably_taken(
; CHECK-NEXT:  loop.preheader:
; CHECK-NEXT:    [[LENGTH:%.*]] = load i32, i32* [[LENGTH_PTR:%.*]], align 4, !range [[RNG1:![0-9]+]]
; CHECK-NEXT:    [[TMP0:%.*]] = icmp ult i32 0, [[LENGTH]]
; CHECK-NEXT:    [[TMP1:%.*]] = and i1 [[TMP0]], false
; CHECK-NEXT:    br label [[LOOP:%.*]]
; CHECK:       loop:
; CHECK-NEXT:    [[LOOP_ACC:%.*]] = phi i32 [ [[LOOP_ACC_NEXT:%.*]], [[LOOP]] ], [ 0, [[LOOP_PREHEADER:%.*]] ]
; CHECK-NEXT:    [[I:%.*]] = phi i32 [ [[I_NEXT:%.*]], [[LOOP]] ], [ 0, [[LOOP_PREHEADER]] ]
; CHECK-NEXT:    call void (i1, ...) @llvm.experimental.guard(i1 [[TMP1]], i32 9) [ "deopt"() ]
; CHECK-NEXT:    [[I_I64:%.*]] = zext i32 [[I]] to i64
; CHECK-NEXT:    [[ARRAY_I_PTR:%.*]] = getelementptr inbounds i32, i32* [[ARRAY:%.*]], i64 [[I_I64]]
; CHECK-NEXT:    [[ARRAY_I:%.*]] = load i32, i32* [[ARRAY_I_PTR]], align 4
; CHECK-NEXT:    [[LOOP_ACC_NEXT]] = add i32 [[LOOP_ACC]], [[ARRAY_I]]
; CHECK-NEXT:    [[I_NEXT]] = add nuw i32 [[I]], 1
; CHECK-NEXT:    [[CONTINUE:%.*]] = icmp slt i32 [[I_NEXT]], 200
; CHECK-NEXT:    br i1 [[CONTINUE]], label [[LOOP]], label [[EXIT:%.*]]
; CHECK:       exit:
; CHECK-NEXT:    [[RESULT:%.*]] = phi i32 [ [[LOOP_ACC_NEXT]], [[LOOP]] ]
; CHECK-NEXT:    ret i32 [[RESULT]]
;
loop.preheader:
  %length = load i32, i32* %length.ptr, !range !{i32 0, i32 50}
  br label %loop

loop:
  %loop.acc = phi i32 [ %loop.acc.next, %loop ], [ 0, %loop.preheader ]
  %i = phi i32 [ %i.next, %loop ], [ 0, %loop.preheader ]
  %within.bounds = icmp ult i32 %i, %length
  call void (i1, ...) @llvm.experimental.guard(i1 %within.bounds, i32 9) [ "deopt"() ]

  %i.i64 = zext i32 %i to i64
  %array.i.ptr = getelementptr inbounds i32, i32* %array, i64 %i.i64
  %array.i = load i32, i32* %array.i.ptr, align 4
  %loop.acc.next = add i32 %loop.acc, %array.i

  %i.next = add nuw i32 %i, 1
  %continue = icmp slt i32 %i.next, 200
  br i1 %continue, label %loop, label %exit

exit:
  %result = phi i32 [ %loop.acc.next, %loop ]
  ret i32 %result
}

; NE Check (as produced by LFTR) where we can prove Start < End via simple
; instruction analysis
define i32 @ne_latch_zext(i32* %array, i32 %length, i16 %n16) {
; CHECK-LABEL: @ne_latch_zext(
; CHECK-NEXT:  loop.preheader:
; CHECK-NEXT:    [[N:%.*]] = zext i16 [[N16:%.*]] to i32
; CHECK-NEXT:    [[NPLUS1:%.*]] = add i32 [[N]], 1
; CHECK-NEXT:    [[TMP0:%.*]] = icmp ule i32 [[NPLUS1]], [[LENGTH:%.*]]
; CHECK-NEXT:    [[TMP1:%.*]] = icmp ult i32 0, [[LENGTH]]
; CHECK-NEXT:    [[TMP2:%.*]] = and i1 [[TMP1]], [[TMP0]]
; CHECK-NEXT:    br label [[LOOP:%.*]]
; CHECK:       loop:
; CHECK-NEXT:    [[I:%.*]] = phi i32 [ [[I_NEXT:%.*]], [[LOOP]] ], [ 0, [[LOOP_PREHEADER:%.*]] ]
; CHECK-NEXT:    call void (i1, ...) @llvm.experimental.guard(i1 [[TMP2]], i32 9) [ "deopt"() ]
; CHECK-NEXT:    [[I_NEXT]] = add nuw nsw i32 [[I]], 1
; CHECK-NEXT:    [[CONTINUE:%.*]] = icmp ne i32 [[I_NEXT]], [[NPLUS1]]
; CHECK-NEXT:    br i1 [[CONTINUE]], label [[LOOP]], label [[EXIT:%.*]]
; CHECK:       exit:
; CHECK-NEXT:    ret i32 0
;
loop.preheader:
  %n = zext i16 %n16 to i32
  %nplus1 = add nsw nuw i32 %n, 1
  br label %loop

loop:
  %i = phi i32 [ %i.next, %loop ], [ 0, %loop.preheader ]
  %within.bounds = icmp ult i32 %i, %length
  call void (i1, ...) @llvm.experimental.guard(i1 %within.bounds, i32 9) [ "deopt"() ]

  %i.next = add nsw nuw i32 %i, 1
  %continue = icmp ne i32 %i.next, %nplus1
  br i1 %continue, label %loop, label %exit

exit:
  ret i32 0
}

; Same as previous, but with a pre-increment test since this is easier to match
define i32 @ne_latch_zext_preinc(i32* %array, i32 %length, i16 %n16) {
; CHECK-LABEL: @ne_latch_zext_preinc(
; CHECK-NEXT:  loop.preheader:
; CHECK-NEXT:    [[N:%.*]] = zext i16 [[N16:%.*]] to i32
; CHECK-NEXT:    [[TMP0:%.*]] = add i32 [[LENGTH:%.*]], -1
; CHECK-NEXT:    [[TMP1:%.*]] = icmp ule i32 [[N]], [[TMP0]]
; CHECK-NEXT:    [[TMP2:%.*]] = icmp ult i32 0, [[LENGTH]]
; CHECK-NEXT:    [[TMP3:%.*]] = and i1 [[TMP2]], [[TMP1]]
; CHECK-NEXT:    br label [[LOOP:%.*]]
; CHECK:       loop:
; CHECK-NEXT:    [[I:%.*]] = phi i32 [ [[I_NEXT:%.*]], [[LOOP]] ], [ 0, [[LOOP_PREHEADER:%.*]] ]
; CHECK-NEXT:    call void (i1, ...) @llvm.experimental.guard(i1 [[TMP3]], i32 9) [ "deopt"() ]
; CHECK-NEXT:    [[I_NEXT]] = add nuw i32 [[I]], 1
; CHECK-NEXT:    [[CONTINUE:%.*]] = icmp ne i32 [[I]], [[N]]
; CHECK-NEXT:    br i1 [[CONTINUE]], label [[LOOP]], label [[EXIT:%.*]]
; CHECK:       exit:
; CHECK-NEXT:    ret i32 0
;
loop.preheader:
  %n = zext i16 %n16 to i32
  br label %loop

loop:
  %i = phi i32 [ %i.next, %loop ], [ 0, %loop.preheader ]
  %within.bounds = icmp ult i32 %i, %length
  call void (i1, ...) @llvm.experimental.guard(i1 %within.bounds, i32 9) [ "deopt"() ]

  %i.next = add nuw i32 %i, 1
  %continue = icmp ne i32 %i, %n
  br i1 %continue, label %loop, label %exit

exit:
  ret i32 0
}

; NE Check (as produced by LFTR) where we can prove Start < End via the
; condition guarding the loop entry.
define i32 @ne_latch_dom_check(i32* %array, i32 %length, i32 %n) {
; CHECK-LABEL: @ne_latch_dom_check(
; CHECK-NEXT:  entry:
; CHECK-NEXT:    [[TMP5:%.*]] = icmp sle i32 [[N:%.*]], 0
; CHECK-NEXT:    [[NPLUS1:%.*]] = add nuw i32 [[N]], 1
; CHECK-NEXT:    br i1 [[TMP5]], label [[EXIT:%.*]], label [[LOOP_PREHEADER:%.*]]
; CHECK:       loop.preheader:
; CHECK-NEXT:    br label [[LOOP:%.*]]
; CHECK:       loop:
; CHECK-NEXT:    [[I:%.*]] = phi i32 [ [[I_NEXT:%.*]], [[LOOP]] ], [ 0, [[LOOP_PREHEADER]] ]
; CHECK-NEXT:    [[WITHIN_BOUNDS:%.*]] = icmp ult i32 [[I]], [[LENGTH:%.*]]
; CHECK-NEXT:    call void (i1, ...) @llvm.experimental.guard(i1 [[WITHIN_BOUNDS]], i32 9) [ "deopt"() ]
; CHECK-NEXT:    [[I_NEXT]] = add nuw nsw i32 [[I]], 1
; CHECK-NEXT:    [[CONTINUE:%.*]] = icmp ne i32 [[I_NEXT]], [[NPLUS1]]
; CHECK-NEXT:    br i1 [[CONTINUE]], label [[LOOP]], label [[EXIT_LOOPEXIT:%.*]]
; CHECK:       exit.loopexit:
; CHECK-NEXT:    br label [[EXIT]]
; CHECK:       exit:
; CHECK-NEXT:    ret i32 0
;
entry:
  %tmp5 = icmp sle i32 %n, 0
  %nplus1 = add nuw i32 %n, 1
  br i1 %tmp5, label %exit, label %loop.preheader

loop.preheader:
  br label %loop

loop:
  %i = phi i32 [ %i.next, %loop ], [ 0, %loop.preheader ]
  %within.bounds = icmp ult i32 %i, %length
  call void (i1, ...) @llvm.experimental.guard(i1 %within.bounds, i32 9) [ "deopt"() ]

  %i.next = add nsw nuw i32 %i, 1
  %continue = icmp ne i32 %i.next, %nplus1
  br i1 %continue, label %loop, label %exit

exit:
  ret i32 0
}

; Same as previous, but easier to match
define i32 @ne_latch_dom_check_preinc(i32* %array, i32 %length, i32 %n) {
; CHECK-LABEL: @ne_latch_dom_check_preinc(
; CHECK-NEXT:  entry:
; CHECK-NEXT:    [[TMP5:%.*]] = icmp sle i32 [[N:%.*]], 0
; CHECK-NEXT:    br i1 [[TMP5]], label [[EXIT:%.*]], label [[LOOP_PREHEADER:%.*]]
; CHECK:       loop.preheader:
; CHECK-NEXT:    [[TMP0:%.*]] = add i32 [[LENGTH:%.*]], -1
; CHECK-NEXT:    [[TMP1:%.*]] = icmp ule i32 [[N]], [[TMP0]]
; CHECK-NEXT:    [[TMP2:%.*]] = icmp ult i32 0, [[LENGTH]]
; CHECK-NEXT:    [[TMP3:%.*]] = and i1 [[TMP2]], [[TMP1]]
; CHECK-NEXT:    br label [[LOOP:%.*]]
; CHECK:       loop:
; CHECK-NEXT:    [[I:%.*]] = phi i32 [ [[I_NEXT:%.*]], [[LOOP]] ], [ 0, [[LOOP_PREHEADER]] ]
; CHECK-NEXT:    call void (i1, ...) @llvm.experimental.guard(i1 [[TMP3]], i32 9) [ "deopt"() ]
; CHECK-NEXT:    [[I_NEXT]] = add nuw i32 [[I]], 1
; CHECK-NEXT:    [[CONTINUE:%.*]] = icmp ne i32 [[I]], [[N]]
; CHECK-NEXT:    br i1 [[CONTINUE]], label [[LOOP]], label [[EXIT_LOOPEXIT:%.*]]
; CHECK:       exit.loopexit:
; CHECK-NEXT:    br label [[EXIT]]
; CHECK:       exit:
; CHECK-NEXT:    ret i32 0
;
entry:
  %tmp5 = icmp sle i32 %n, 0
  br i1 %tmp5, label %exit, label %loop.preheader

loop.preheader:
  br label %loop

loop:
  %i = phi i32 [ %i.next, %loop ], [ 0, %loop.preheader ]
  %within.bounds = icmp ult i32 %i, %length
  call void (i1, ...) @llvm.experimental.guard(i1 %within.bounds, i32 9) [ "deopt"() ]

  %i.next = add nuw i32 %i, 1
  %continue = icmp ne i32 %i, %n
  br i1 %continue, label %loop, label %exit

exit:
  ret i32 0
}

; Same as previous, except swapped br/cmp
define i32 @eq_latch_dom_check_preinc(i32* %array, i32 %length, i32 %n) {
; CHECK-LABEL: @eq_latch_dom_check_preinc(
; CHECK-NEXT:  entry:
; CHECK-NEXT:    [[TMP5:%.*]] = icmp sle i32 [[N:%.*]], 0
; CHECK-NEXT:    br i1 [[TMP5]], label [[EXIT:%.*]], label [[LOOP_PREHEADER:%.*]]
; CHECK:       loop.preheader:
; CHECK-NEXT:    [[TMP0:%.*]] = add i32 [[LENGTH:%.*]], -1
; CHECK-NEXT:    [[TMP1:%.*]] = icmp ule i32 [[N]], [[TMP0]]
; CHECK-NEXT:    [[TMP2:%.*]] = icmp ult i32 0, [[LENGTH]]
; CHECK-NEXT:    [[TMP3:%.*]] = and i1 [[TMP2]], [[TMP1]]
; CHECK-NEXT:    br label [[LOOP:%.*]]
; CHECK:       loop:
; CHECK-NEXT:    [[I:%.*]] = phi i32 [ [[I_NEXT:%.*]], [[LOOP]] ], [ 0, [[LOOP_PREHEADER]] ]
; CHECK-NEXT:    call void (i1, ...) @llvm.experimental.guard(i1 [[TMP3]], i32 9) [ "deopt"() ]
; CHECK-NEXT:    [[I_NEXT]] = add nuw i32 [[I]], 1
; CHECK-NEXT:    [[DONE:%.*]] = icmp eq i32 [[I]], [[N]]
; CHECK-NEXT:    br i1 [[DONE]], label [[EXIT_LOOPEXIT:%.*]], label [[LOOP]]
; CHECK:       exit.loopexit:
; CHECK-NEXT:    br label [[EXIT]]
; CHECK:       exit:
; CHECK-NEXT:    ret i32 0
;
entry:
  %tmp5 = icmp sle i32 %n, 0
  br i1 %tmp5, label %exit, label %loop.preheader

loop.preheader:
  br label %loop

loop:
  %i = phi i32 [ %i.next, %loop ], [ 0, %loop.preheader ]
  %within.bounds = icmp ult i32 %i, %length
  call void (i1, ...) @llvm.experimental.guard(i1 %within.bounds, i32 9) [ "deopt"() ]

  %i.next = add nuw i32 %i, 1
  %done = icmp eq i32 %i, %n
  br i1 %done, label %exit, label %loop

exit:
  ret i32 0
}


; NE latch - can't prove (end-start) mod step == 0 (i.e. might wrap
; around several times or even be infinite)
define i32 @neg_ne_latch_mod_step(i32* %array, i32 %length, i16 %n16) {
; CHECK-LABEL: @neg_ne_latch_mod_step(
; CHECK-NEXT:  loop.preheader:
; CHECK-NEXT:    [[N:%.*]] = zext i16 [[N16:%.*]] to i32
; CHECK-NEXT:    br label [[LOOP:%.*]]
; CHECK:       loop:
; CHECK-NEXT:    [[I:%.*]] = phi i32 [ [[I_NEXT:%.*]], [[LOOP]] ], [ 0, [[LOOP_PREHEADER:%.*]] ]
; CHECK-NEXT:    [[WITHIN_BOUNDS:%.*]] = icmp ult i32 [[I]], [[LENGTH:%.*]]
; CHECK-NEXT:    call void (i1, ...) @llvm.experimental.guard(i1 [[WITHIN_BOUNDS]], i32 9) [ "deopt"() ]
; CHECK-NEXT:    [[I_NEXT]] = add i32 [[I]], 3
; CHECK-NEXT:    [[CONTINUE:%.*]] = icmp ne i32 [[I]], [[N]]
; CHECK-NEXT:    br i1 [[CONTINUE]], label [[LOOP]], label [[EXIT:%.*]]
; CHECK:       exit:
; CHECK-NEXT:    ret i32 0
;
loop.preheader:
  %n = zext i16 %n16 to i32
  br label %loop

loop:
  %i = phi i32 [ %i.next, %loop ], [ 0, %loop.preheader ]
  %within.bounds = icmp ult i32 %i, %length
  call void (i1, ...) @llvm.experimental.guard(i1 %within.bounds, i32 9) [ "deopt"() ]

  %i.next = add i32 %i, 3
  %continue = icmp ne i32 %i, %n
  br i1 %continue, label %loop, label %exit

exit:
  ret i32 0
}

; NE latch - TODO: could prove (end-start) mod step == 0
define i32 @ne_latch_mod_step(i32* %array, i32 %length) {
; CHECK-LABEL: @ne_latch_mod_step(
; CHECK-NEXT:  loop.preheader:
; CHECK-NEXT:    br label [[LOOP:%.*]]
; CHECK:       loop:
; CHECK-NEXT:    [[I:%.*]] = phi i32 [ [[I_NEXT:%.*]], [[LOOP]] ], [ 0, [[LOOP_PREHEADER:%.*]] ]
; CHECK-NEXT:    [[WITHIN_BOUNDS:%.*]] = icmp ult i32 [[I]], [[LENGTH:%.*]]
; CHECK-NEXT:    call void (i1, ...) @llvm.experimental.guard(i1 [[WITHIN_BOUNDS]], i32 9) [ "deopt"() ]
; CHECK-NEXT:    [[I_NEXT]] = add nuw i32 [[I]], 2
; CHECK-NEXT:    [[CONTINUE:%.*]] = icmp ne i32 [[I]], 400
; CHECK-NEXT:    br i1 [[CONTINUE]], label [[LOOP]], label [[EXIT:%.*]]
; CHECK:       exit:
; CHECK-NEXT:    ret i32 0
;
loop.preheader:
  br label %loop

loop:
  %i = phi i32 [ %i.next, %loop ], [ 0, %loop.preheader ]
  %within.bounds = icmp ult i32 %i, %length
  call void (i1, ...) @llvm.experimental.guard(i1 %within.bounds, i32 9) [ "deopt"() ]

  %i.next = add nuw i32 %i, 2
  %continue = icmp ne i32 %i, 400
  br i1 %continue, label %loop, label %exit

exit:
  ret i32 0
}

; NE Latch - but end > start so wraps around and not equivelent to a ult
define i32 @neg_ne_latch_swapped_order(i32* %array, i32 %length) {
; CHECK-LABEL: @neg_ne_latch_swapped_order(
; CHECK-NEXT:  loop.preheader:
; CHECK-NEXT:    br label [[LOOP:%.*]]
; CHECK:       loop:
; CHECK-NEXT:    [[I:%.*]] = phi i32 [ [[I_NEXT:%.*]], [[LOOP]] ], [ 400, [[LOOP_PREHEADER:%.*]] ]
; CHECK-NEXT:    [[WITHIN_BOUNDS:%.*]] = icmp ult i32 [[I]], [[LENGTH:%.*]]
; CHECK-NEXT:    call void (i1, ...) @llvm.experimental.guard(i1 [[WITHIN_BOUNDS]], i32 9) [ "deopt"() ]
; CHECK-NEXT:    [[I_NEXT]] = add i32 [[I]], 1
; CHECK-NEXT:    [[CONTINUE:%.*]] = icmp ne i32 [[I]], 0
; CHECK-NEXT:    br i1 [[CONTINUE]], label [[LOOP]], label [[EXIT:%.*]]
; CHECK:       exit:
; CHECK-NEXT:    ret i32 0
;
loop.preheader:
  br label %loop

loop:
  %i = phi i32 [ %i.next, %loop ], [ 400, %loop.preheader ]
  %within.bounds = icmp ult i32 %i, %length
  call void (i1, ...) @llvm.experimental.guard(i1 %within.bounds, i32 9) [ "deopt"() ]

  %i.next = add i32 %i, 1
  %continue = icmp ne i32 %i, 0
  br i1 %continue, label %loop, label %exit

exit:
  ret i32 0
}

; Negative test, make sure we don't crash on unconditional latches
; TODO: there's no reason we shouldn't be able to predicate the
; condition for an statically infinite loop.
define i32 @unconditional_latch(i32* %a, i32 %length) {
; CHECK-LABEL: @unconditional_latch(
; CHECK-NEXT:  loop.preheader:
; CHECK-NEXT:    br label [[LOOP:%.*]]
; CHECK:       loop:
; CHECK-NEXT:    [[I:%.*]] = phi i32 [ [[I_NEXT:%.*]], [[LOOP]] ], [ 400, [[LOOP_PREHEADER:%.*]] ]
; CHECK-NEXT:    [[WITHIN_BOUNDS:%.*]] = icmp ult i32 [[I]], [[LENGTH:%.*]]
; CHECK-NEXT:    call void (i1, ...) @llvm.experimental.guard(i1 [[WITHIN_BOUNDS]], i32 9) [ "deopt"() ]
; CHECK-NEXT:    store volatile i32 0, i32* [[A:%.*]], align 4
; CHECK-NEXT:    [[I_NEXT]] = add i32 [[I]], 1
; CHECK-NEXT:    br label [[LOOP]]
;
loop.preheader:
  br label %loop

loop:
  %i = phi i32 [ %i.next, %loop ], [ 400, %loop.preheader ]
  %within.bounds = icmp ult i32 %i, %length
  call void (i1, ...) @llvm.experimental.guard(i1 %within.bounds, i32 9) [ "deopt"() ]
  store volatile i32 0, i32* %a
  %i.next = add i32 %i, 1
  br label %loop
}