; NOTE: Assertions have been autogenerated by utils/update_analyze_test_checks.py UTC_ARGS: --version 5
; RUN: opt -passes='print<scalar-evolution>' -disable-output %s 2>&1 | FileCheck %s

target datalayout = "e-m:o-p270:32:32-p271:32:32-p272:64:64-i64:64-i128:128-n32:64-S128-Fn32"

define i32 @last_loaded_with_or_exit(i32 %n, ptr %arr) mustprogress {
; CHECK-LABEL: 'last_loaded_with_or_exit'
; CHECK-NEXT:  Classifying expressions for: @last_loaded_with_or_exit
; CHECK-NEXT:    %iv = phi i32 [ %iv.next, %latch ], [ 0, %entry ]
; CHECK-NEXT:    --> {0,+,1}<%header> U: full-set S: full-set Exits: <<Unknown>> LoopDispositions: { %header: Computable }
; CHECK-NEXT:    %last_loaded = phi i32 [ %last_loaded.next, %latch ], [ 0, %entry ]
; CHECK-NEXT:    --> %last_loaded U: full-set S: full-set Exits: <<Unknown>> LoopDispositions: { %header: Variant }
; CHECK-NEXT:    %iv_minus_one = add i32 -1, %iv
; CHECK-NEXT:    --> {-1,+,1}<%header> U: full-set S: full-set Exits: <<Unknown>> LoopDispositions: { %header: Computable }
; CHECK-NEXT:    %stay = or i1 %iv_lt_n, %iv_minus_one_lt_n
; CHECK-NEXT:    --> (%iv_minus_one_lt_n umax %iv_lt_n) U: full-set S: full-set Exits: <<Unknown>> LoopDispositions: { %header: Variant }
; CHECK-NEXT:    %body_iv_minus_one = add i32 -1, %iv
; CHECK-NEXT:    --> {-1,+,1}<%header> U: full-set S: full-set Exits: <<Unknown>> LoopDispositions: { %header: Computable }
; CHECK-NEXT:    %idx = zext nneg i32 %body_iv_minus_one to i64
; CHECK-NEXT:    --> (zext i32 {-1,+,1}<%header> to i64) U: [0,4294967296) S: [0,4294967296) Exits: <<Unknown>> LoopDispositions: { %header: Computable }
; CHECK-NEXT:    %addr = getelementptr inbounds i32, ptr %arr, i64 %idx
; CHECK-NEXT:    --> ((4 * (zext i32 {-1,+,1}<%header> to i64))<nuw><nsw> + %arr) U: full-set S: full-set Exits: <<Unknown>> LoopDispositions: { %header: Computable }
; CHECK-NEXT:    %loaded = load i32, ptr %addr, align 4
; CHECK-NEXT:    --> %loaded U: full-set S: full-set Exits: <<Unknown>> LoopDispositions: { %header: Variant }
; CHECK-NEXT:    %last_loaded.next = phi i32 [ %last_loaded, %body ], [ %loaded, %do_load ]
; CHECK-NEXT:    --> %last_loaded.next U: full-set S: full-set Exits: <<Unknown>> LoopDispositions: { %header: Variant }
; CHECK-NEXT:    %iv.next = add i32 %iv, 1
; CHECK-NEXT:    --> {1,+,1}<%header> U: full-set S: full-set Exits: <<Unknown>> LoopDispositions: { %header: Computable }
; CHECK-NEXT:  Determining loop execution counts for: @last_loaded_with_or_exit
; CHECK-NEXT:  Loop %header: Unpredictable backedge-taken count.
; CHECK-NEXT:  Loop %header: Unpredictable constant max backedge-taken count.
; CHECK-NEXT:  Loop %header: Unpredictable symbolic max backedge-taken count.
;
entry:
  br label %header

header:
  %iv = phi i32 [ %iv.next, %latch ], [ 0, %entry ]
  %last_loaded = phi i32 [ %last_loaded.next, %latch ], [ 0, %entry ]
  %iv_lt_n = icmp ult i32 %iv, %n
  %iv_minus_one = add i32 -1, %iv
  %iv_minus_one_lt_n = icmp ult i32 %iv_minus_one, %n
  %stay = or i1 %iv_lt_n, %iv_minus_one_lt_n
  br i1 %stay, label %body, label %exit

body:
  %body_iv_minus_one = add i32 -1, %iv
  %body_iv_minus_one_nonneg = icmp sgt i32 %body_iv_minus_one, -1
  br i1 %body_iv_minus_one_nonneg, label %do_load, label %latch

do_load:
  %idx = zext nneg i32 %body_iv_minus_one to i64
  %addr = getelementptr inbounds i32, ptr %arr, i64 %idx
  %loaded = load i32, ptr %addr
  br label %latch

latch:
  %last_loaded.next = phi i32 [ %last_loaded, %body ], [ %loaded, %do_load ]
  %iv.next = add i32 %iv, 1
  br label %header

exit:
  ret i32 %last_loaded
}