test/Transforms/LoopUnroll/add-folding-overflow.ll

; NOTE: Assertions have been autogenerated by utils/update_test_checks.py UTC_ARGS: --version 2
; RUN: opt -S -passes=loop-unroll -unroll-allow-partial < %s | FileCheck %s

declare void @use(i8)

define void @test(i8 %start1, i8 %start2, i8 %start3, i8 %start4) {
; CHECK-LABEL: define void @test
; CHECK-SAME: (i8 [[START1:%.*]], i8 [[START2:%.*]], i8 [[START3:%.*]], i8 [[START4:%.*]]) {
; CHECK-NEXT:  entry:
; CHECK-NEXT:    br label [[LOOP:%.*]]
; CHECK:       loop:
; CHECK-NEXT:    [[IV:%.*]] = phi i32 [ 0, [[ENTRY:%.*]] ], [ [[IV_NEXT_4:%.*]], [[LOOP]] ]
; CHECK-NEXT:    [[IV1:%.*]] = phi i8 [ [[START1]], [[ENTRY]] ], [ [[IV1_NEXT_4:%.*]], [[LOOP]] ]
; CHECK-NEXT:    [[IV2:%.*]] = phi i8 [ [[START2]], [[ENTRY]] ], [ [[IV2_NEXT_4:%.*]], [[LOOP]] ]
; CHECK-NEXT:    [[IV3:%.*]] = phi i8 [ [[START3]], [[ENTRY]] ], [ [[IV3_NEXT_4:%.*]], [[LOOP]] ]
; CHECK-NEXT:    [[IV4:%.*]] = phi i8 [ [[START4]], [[ENTRY]] ], [ [[IV4_NEXT_4:%.*]], [[LOOP]] ]
; CHECK-NEXT:    [[IV1_NEXT:%.*]] = add i8 [[IV1]], 1
; CHECK-NEXT:    call void @use(i8 [[IV1_NEXT]])
; CHECK-NEXT:    [[IV2_NEXT:%.*]] = add nuw i8 [[IV2]], 1
; CHECK-NEXT:    call void @use(i8 [[IV2_NEXT]])
; CHECK-NEXT:    [[IV3_NEXT:%.*]] = add nsw i8 [[IV3]], 1
; CHECK-NEXT:    call void @use(i8 [[IV3_NEXT]])
; CHECK-NEXT:    [[IV4_NEXT:%.*]] = add nsw i8 [[IV4]], 127
; CHECK-NEXT:    call void @use(i8 [[IV4_NEXT]])
; CHECK-NEXT:    [[IV1_NEXT_1:%.*]] = add i8 [[IV1]], 2
; CHECK-NEXT:    call void @use(i8 [[IV1_NEXT_1]])
; CHECK-NEXT:    [[IV2_NEXT_1:%.*]] = add nuw i8 [[IV2]], 2
; CHECK-NEXT:    call void @use(i8 [[IV2_NEXT_1]])
; CHECK-NEXT:    [[IV3_NEXT_1:%.*]] = add nsw i8 [[IV3]], 2
; CHECK-NEXT:    call void @use(i8 [[IV3_NEXT_1]])
; CHECK-NEXT:    [[IV4_NEXT_1:%.*]] = add i8 [[IV4]], -2
; CHECK-NEXT:    call void @use(i8 [[IV4_NEXT_1]])
; CHECK-NEXT:    [[IV1_NEXT_2:%.*]] = add i8 [[IV1]], 3
; CHECK-NEXT:    call void @use(i8 [[IV1_NEXT_2]])
; CHECK-NEXT:    [[IV2_NEXT_2:%.*]] = add nuw i8 [[IV2]], 3
; CHECK-NEXT:    call void @use(i8 [[IV2_NEXT_2]])
; CHECK-NEXT:    [[IV3_NEXT_2:%.*]] = add nsw i8 [[IV3]], 3
; CHECK-NEXT:    call void @use(i8 [[IV3_NEXT_2]])
; CHECK-NEXT:    [[IV4_NEXT_2:%.*]] = add i8 [[IV4]], 125
; CHECK-NEXT:    call void @use(i8 [[IV4_NEXT_2]])
; CHECK-NEXT:    [[IV1_NEXT_3:%.*]] = add i8 [[IV1]], 4
; CHECK-NEXT:    call void @use(i8 [[IV1_NEXT_3]])
; CHECK-NEXT:    [[IV2_NEXT_3:%.*]] = add nuw i8 [[IV2]], 4
; CHECK-NEXT:    call void @use(i8 [[IV2_NEXT_3]])
; CHECK-NEXT:    [[IV3_NEXT_3:%.*]] = add nsw i8 [[IV3]], 4
; CHECK-NEXT:    call void @use(i8 [[IV3_NEXT_3]])
; CHECK-NEXT:    [[IV4_NEXT_3:%.*]] = add i8 [[IV4]], -4
; CHECK-NEXT:    call void @use(i8 [[IV4_NEXT_3]])
; CHECK-NEXT:    [[IV_NEXT_3:%.*]] = add nuw nsw i32 [[IV]], 4
; CHECK-NEXT:    [[IV1_NEXT_4]] = add i8 [[IV1]], 5
; CHECK-NEXT:    call void @use(i8 [[IV1_NEXT_4]])
; CHECK-NEXT:    [[IV2_NEXT_4]] = add nuw i8 [[IV2]], 5
; CHECK-NEXT:    call void @use(i8 [[IV2_NEXT_4]])
; CHECK-NEXT:    [[IV3_NEXT_4]] = add nsw i8 [[IV3]], 5
; CHECK-NEXT:    call void @use(i8 [[IV3_NEXT_4]])
; CHECK-NEXT:    [[IV4_NEXT_4]] = add i8 [[IV4]], 123
; CHECK-NEXT:    call void @use(i8 [[IV4_NEXT_4]])
; CHECK-NEXT:    [[IV_NEXT_4]] = add nuw nsw i32 [[IV]], 5
; CHECK-NEXT:    [[CMP_4:%.*]] = icmp eq i32 [[IV_NEXT_3]], 1024
; CHECK-NEXT:    br i1 [[CMP_4]], label [[EXIT:%.*]], label [[LOOP]]
; CHECK:       exit:
; CHECK-NEXT:    ret void
;
entry:
  br label %loop

loop:
  %iv = phi i32 [ 0, %entry ], [ %iv.next, %loop ]
  %iv1 = phi i8 [ %start1, %entry ], [ %iv1.next, %loop ]
  %iv2 = phi i8 [ %start2, %entry ], [ %iv2.next, %loop ]
  %iv3 = phi i8 [ %start3, %entry ], [ %iv3.next, %loop ]
  %iv4 = phi i8 [ %start4, %entry ], [ %iv4.next, %loop ]
  %iv1.next = add i8 %iv1, 1
  call void @use(i8 %iv1.next)
  %iv2.next = add nuw i8 %iv2, 1
  call void @use(i8 %iv2.next)
  %iv3.next = add nsw i8 %iv3, 1
  call void @use(i8 %iv3.next)
  %iv4.next = add nsw i8 %iv4, 127
  call void @use(i8 %iv4.next)
  %iv.next = add i32 %iv, 1
  %cmp = icmp eq i32 %iv, 1024
  br i1 %cmp, label %exit, label %loop

exit:
  ret void
}