test/Transforms/LoopVectorize/pr58811-scev-expansion.ll

; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
; RUN: opt -passes=loop-vectorize -force-vector-width=4 -force-vector-interleave=1 -S %s | FileCheck %s

define void @test1_pr58811() {
; CHECK-LABEL: @test1_pr58811(
; CHECK-NEXT:  entry:
; CHECK-NEXT:    br label [[LOOP_1_PREHEADER:%.*]]
; CHECK:       loop.1.preheader:
; CHECK-NEXT:    [[IV_1_PH:%.*]] = phi i32 [ [[SUB93_2:%.*]], [[UNREACHABLE_BB:%.*]] ], [ 0, [[ENTRY:%.*]] ]
; CHECK-NEXT:    [[TMP0:%.*]] = sub i32 0, [[IV_1_PH]]
; CHECK-NEXT:    br label [[LOOP_1:%.*]]
; CHECK:       loop.1:
; CHECK-NEXT:    [[INDUCTION_IV:%.*]] = phi i32 [ [[INDUCTION_IV_NEXT:%.*]], [[LOOP_1]] ], [ [[TMP0]], [[LOOP_1_PREHEADER]] ]
; CHECK-NEXT:    [[IV_1:%.*]] = phi i32 [ [[IV_1_NEXT:%.*]], [[LOOP_1]] ], [ [[IV_1_PH]], [[LOOP_1_PREHEADER]] ]
; CHECK-NEXT:    [[IV_2:%.*]] = phi i32 [ [[IV_2_NEXT:%.*]], [[LOOP_1]] ], [ 0, [[LOOP_1_PREHEADER]] ]
; CHECK-NEXT:    [[TMP1:%.*]] = mul nuw nsw i32 [[IV_2]], -1
; CHECK-NEXT:    [[IV_2_NEXT]] = add i32 [[IV_2]], 1
; CHECK-NEXT:    [[IV_1_NEXT]] = add i32 [[IV_2]], [[IV_1]]
; CHECK-NEXT:    [[INDUCTION_IV_NEXT]] = add i32 [[INDUCTION_IV]], [[TMP1]]
; CHECK-NEXT:    br i1 false, label [[LOOP_1]], label [[LOOP_2_PREHEADER:%.*]]
; CHECK:       loop.2.preheader:
; CHECK-NEXT:    [[INDUCTION_IV_LCSSA:%.*]] = phi i32 [ [[INDUCTION_IV]], [[LOOP_1]] ]
; CHECK-NEXT:    [[IV_1_LCSSA:%.*]] = phi i32 [ [[IV_1]], [[LOOP_1]] ]
; CHECK-NEXT:    br i1 false, label [[SCALAR_PH:%.*]], label [[VECTOR_PH:%.*]]
; CHECK:       vector.ph:
; CHECK-NEXT:    [[IND_END:%.*]] = mul i32 196, [[INDUCTION_IV_LCSSA]]
; CHECK-NEXT:    br label [[VECTOR_BODY:%.*]]
; CHECK:       vector.body:
; CHECK-NEXT:    [[INDEX:%.*]] = phi i32 [ 0, [[VECTOR_PH]] ], [ [[INDEX_NEXT:%.*]], [[VECTOR_BODY]] ]
; CHECK-NEXT:    [[INDEX_NEXT]] = add nuw i32 [[INDEX]], 4
; CHECK-NEXT:    [[TMP2:%.*]] = icmp eq i32 [[INDEX_NEXT]], 196
; CHECK-NEXT:    br i1 [[TMP2]], label [[MIDDLE_BLOCK:%.*]], label [[VECTOR_BODY]], !llvm.loop [[LOOP0:![0-9]+]]
; CHECK:       middle.block:
; CHECK-NEXT:    [[IND_ESCAPE:%.*]] = sub i32 [[IND_END]], [[INDUCTION_IV_LCSSA]]
; CHECK-NEXT:    br i1 false, label [[LOOP_3_PREHEADER:%.*]], label [[SCALAR_PH]]
; CHECK:       scalar.ph:
; CHECK-NEXT:    [[BC_RESUME_VAL:%.*]] = phi i16 [ 196, [[MIDDLE_BLOCK]] ], [ 0, [[LOOP_2_PREHEADER]] ]
; CHECK-NEXT:    [[BC_RESUME_VAL1:%.*]] = phi i32 [ [[IND_END]], [[MIDDLE_BLOCK]] ], [ 0, [[LOOP_2_PREHEADER]] ]
; CHECK-NEXT:    br label [[LOOP_2:%.*]]
; CHECK:       loop.2:
; CHECK-NEXT:    [[IV_3:%.*]] = phi i16 [ [[IV_3_NEXT:%.*]], [[LOOP_2]] ], [ [[BC_RESUME_VAL]], [[SCALAR_PH]] ]
; CHECK-NEXT:    [[IV_4:%.*]] = phi i32 [ [[IV_4_NEXT:%.*]], [[LOOP_2]] ], [ [[BC_RESUME_VAL1]], [[SCALAR_PH]] ]
; CHECK-NEXT:    [[IV_4_NEXT]] = sub i32 [[IV_4]], [[IV_1_LCSSA]]
; CHECK-NEXT:    [[IV_3_NEXT]] = add i16 [[IV_3]], 1
; CHECK-NEXT:    [[CMP88_1:%.*]] = icmp ult i16 [[IV_3]], 198
; CHECK-NEXT:    br i1 [[CMP88_1]], label [[LOOP_2]], label [[LOOP_3_PREHEADER]], !llvm.loop [[LOOP3:![0-9]+]]
; CHECK:       loop.3.preheader:
; CHECK-NEXT:    [[IV_4_LCSSA:%.*]] = phi i32 [ [[IV_4]], [[LOOP_2]] ], [ [[IND_ESCAPE]], [[MIDDLE_BLOCK]] ]
; CHECK-NEXT:    br label [[LOOP_3:%.*]]
; CHECK:       loop.3:
; CHECK-NEXT:    [[IV_5:%.*]] = phi i32 [ [[SUB93_2]], [[LOOP_3]] ], [ 0, [[LOOP_3_PREHEADER]] ]
; CHECK-NEXT:    [[SUB93_2]] = sub i32 [[IV_5]], [[IV_4_LCSSA]]
; CHECK-NEXT:    br label [[LOOP_3]]
; CHECK:       unreachable.bb:
; CHECK-NEXT:    br label [[LOOP_1_PREHEADER]]
;
entry:
  br label %loop.1.preheader

loop.1.preheader:
  %iv.1.ph = phi i32 [ %sub93.2, %unreachable.bb ], [ 0, %entry ]
  br label %loop.1

loop.1:
  %iv.1 = phi i32 [ %iv.1.next, %loop.1 ], [ %iv.1.ph, %loop.1.preheader ]
  %iv.2 = phi i32 [ %iv.2.next, %loop.1 ], [ 0, %loop.1.preheader ]
  %iv.2.next = add i32 %iv.2, 1
  %iv.1.next = add i32 %iv.2, %iv.1
  br i1 false, label %loop.1, label %loop.2.preheader

loop.2.preheader:
  %iv.1.lcssa = phi i32 [ %iv.1, %loop.1 ]
  br label %loop.2

loop.2:
  %iv.3 = phi i16 [ %iv.3.next, %loop.2 ], [ 0, %loop.2.preheader ]
  %iv.4 = phi i32 [ %iv.4.next, %loop.2 ], [ 0, %loop.2.preheader ]
  %iv.4.next = sub i32 %iv.4, %iv.1.lcssa
  %iv.3.next = add i16 %iv.3, 1
  %cmp88.1 = icmp ult i16 %iv.3, 198
  br i1 %cmp88.1, label %loop.2, label %loop.3.preheader

loop.3.preheader:
  %iv.4.lcssa = phi i32 [ %iv.4, %loop.2 ]
  br label %loop.3

loop.3:
  %iv.5 = phi i32 [ %sub93.2, %loop.3 ], [ 0, %loop.3.preheader ]
  %sub93.2 = sub i32 %iv.5, %iv.4.lcssa
  br label %loop.3

unreachable.bb:                                   ; No predecessors!
  br label %loop.1.preheader
}

define void @test2_pr58811() {
; CHECK-LABEL: @test2_pr58811(
; CHECK-NEXT:  entry:
; CHECK-NEXT:    br label [[LOOP_1_HEADER:%.*]]
; CHECK:       loop.1.header.loopexit:
; CHECK-NEXT:    [[SUB93_2_LCSSA:%.*]] = phi i32 [ [[SUB93_2:%.*]], [[LOOP_4:%.*]] ]
; CHECK-NEXT:    br label [[LOOP_1_HEADER]]
; CHECK:       loop.1.header:
; CHECK-NEXT:    [[P_1:%.*]] = phi i32 [ 0, [[ENTRY:%.*]] ], [ [[SUB93_2_LCSSA]], [[LOOP_1_HEADER_LOOPEXIT:%.*]] ]
; CHECK-NEXT:    [[TMP0:%.*]] = mul i32 [[P_1]], -1
; CHECK-NEXT:    br label [[LOOP_2:%.*]]
; CHECK:       loop.2:
; CHECK-NEXT:    [[INDUCTION_IV:%.*]] = phi i32 [ [[INDUCTION_IV_NEXT:%.*]], [[LOOP_2]] ], [ [[TMP0]], [[LOOP_1_HEADER]] ]
; CHECK-NEXT:    [[IV_2:%.*]] = phi i32 [ [[P_1]], [[LOOP_1_HEADER]] ], [ [[ADD101:%.*]], [[LOOP_2]] ]
; CHECK-NEXT:    [[IV_3:%.*]] = phi i32 [ 0, [[LOOP_1_HEADER]] ], [ [[SUB93:%.*]], [[LOOP_2]] ]
; CHECK-NEXT:    [[TMP1:%.*]] = mul nuw nsw i32 [[IV_3]], -1
; CHECK-NEXT:    [[SUB93]] = add i32 [[IV_3]], 1
; CHECK-NEXT:    [[ADD101]] = add i32 [[IV_3]], [[IV_2]]
; CHECK-NEXT:    [[INDUCTION_IV_NEXT]] = add i32 [[INDUCTION_IV]], [[TMP1]]
; CHECK-NEXT:    br i1 false, label [[LOOP_2]], label [[LOOP_3_PREHEADER:%.*]]
; CHECK:       loop.3.preheader:
; CHECK-NEXT:    [[IV_2_LCSSA:%.*]] = phi i32 [ [[IV_2]], [[LOOP_2]] ]
; CHECK-NEXT:    [[INDUCTION_IV_LCSSA:%.*]] = phi i32 [ [[INDUCTION_IV]], [[LOOP_2]] ]
; CHECK-NEXT:    br i1 false, label [[SCALAR_PH:%.*]], label [[VECTOR_PH:%.*]]
; CHECK:       vector.ph:
; CHECK-NEXT:    [[IND_END:%.*]] = mul i32 196, [[INDUCTION_IV_LCSSA]]
; CHECK-NEXT:    br label [[VECTOR_BODY:%.*]]
; CHECK:       vector.body:
; CHECK-NEXT:    [[INDEX:%.*]] = phi i32 [ 0, [[VECTOR_PH]] ], [ [[INDEX_NEXT:%.*]], [[VECTOR_BODY]] ]
; CHECK-NEXT:    [[INDEX_NEXT]] = add nuw i32 [[INDEX]], 4
; CHECK-NEXT:    [[TMP2:%.*]] = icmp eq i32 [[INDEX_NEXT]], 196
; CHECK-NEXT:    br i1 [[TMP2]], label [[MIDDLE_BLOCK:%.*]], label [[VECTOR_BODY]], !llvm.loop [[LOOP4:![0-9]+]]
; CHECK:       middle.block:
; CHECK-NEXT:    [[IND_ESCAPE:%.*]] = sub i32 [[IND_END]], [[INDUCTION_IV_LCSSA]]
; CHECK-NEXT:    br i1 false, label [[LOOP_4_PREHEADER:%.*]], label [[SCALAR_PH]]
; CHECK:       scalar.ph:
; CHECK-NEXT:    [[BC_RESUME_VAL:%.*]] = phi i16 [ 196, [[MIDDLE_BLOCK]] ], [ 0, [[LOOP_3_PREHEADER]] ]
; CHECK-NEXT:    [[BC_RESUME_VAL1:%.*]] = phi i32 [ [[IND_END]], [[MIDDLE_BLOCK]] ], [ 0, [[LOOP_3_PREHEADER]] ]
; CHECK-NEXT:    br label [[LOOP_3:%.*]]
; CHECK:       loop.3:
; CHECK-NEXT:    [[IV_4:%.*]] = phi i16 [ [[INC_1:%.*]], [[LOOP_3]] ], [ [[BC_RESUME_VAL]], [[SCALAR_PH]] ]
; CHECK-NEXT:    [[IV_5:%.*]] = phi i32 [ [[SUB93_1:%.*]], [[LOOP_3]] ], [ [[BC_RESUME_VAL1]], [[SCALAR_PH]] ]
; CHECK-NEXT:    [[SUB93_1]] = sub i32 [[IV_5]], [[IV_2_LCSSA]]
; CHECK-NEXT:    [[INC_1]] = add i16 [[IV_4]], 1
; CHECK-NEXT:    [[CMP88_1:%.*]] = icmp ult i16 [[IV_4]], 198
; CHECK-NEXT:    br i1 [[CMP88_1]], label [[LOOP_3]], label [[LOOP_4_PREHEADER]], !llvm.loop [[LOOP5:![0-9]+]]
; CHECK:       loop.4.preheader:
; CHECK-NEXT:    [[IV_5_LCSSA:%.*]] = phi i32 [ [[IV_5]], [[LOOP_3]] ], [ [[IND_ESCAPE]], [[MIDDLE_BLOCK]] ]
; CHECK-NEXT:    br label [[LOOP_4]]
; CHECK:       loop.4:
; CHECK-NEXT:    [[IV_6:%.*]] = phi i32 [ [[SUB93_2]], [[LOOP_4]] ], [ 0, [[LOOP_4_PREHEADER]] ]
; CHECK-NEXT:    [[SUB93_2]] = sub i32 [[IV_6]], [[IV_5_LCSSA]]
; CHECK-NEXT:    br i1 false, label [[LOOP_4]], label [[LOOP_1_HEADER_LOOPEXIT]]
;
entry:
  br label %loop.1.header

loop.1.header:
  %p.1 = phi i32 [ 0, %entry ], [ %sub93.2, %loop.4 ]
  br label %loop.2

loop.2:
  %iv.2 = phi i32 [ %p.1, %loop.1.header ], [ %add101, %loop.2 ]
  %iv.3 = phi i32 [ 0, %loop.1.header ], [ %sub93, %loop.2 ]
  %sub93 = add i32 %iv.3, 1
  %add101 = add i32 %iv.3, %iv.2
  br i1 false, label %loop.2, label %loop.3

loop.3:
  %iv.4 = phi i16 [ 0, %loop.2 ], [ %inc.1, %loop.3 ]
  %iv.5 = phi i32 [ 0, %loop.2 ], [ %sub93.1, %loop.3 ]
  %sub93.1 = sub i32 %iv.5, %iv.2
  %inc.1 = add i16 %iv.4, 1
  %cmp88.1 = icmp ult i16 %iv.4, 198
  br i1 %cmp88.1, label %loop.3, label %loop.4

loop.4:
  %iv.6 = phi i32 [ 0, %loop.3 ], [ %sub93.2, %loop.4 ]
  %sub93.2 = sub i32 %iv.6, %iv.5
  br i1 false, label %loop.4, label %loop.1.header
}

define void @test3_pr58811() {
; CHECK-LABEL: @test3_pr58811(
; CHECK-NEXT:  entry:
; CHECK-NEXT:    br label [[LOOP_1_HEADER:%.*]]
; CHECK:       loop.1.header:
; CHECK-NEXT:    [[P_1:%.*]] = phi i32 [ 0, [[ENTRY:%.*]] ], [ [[SUB93_2:%.*]], [[LOOP_1_LATCH:%.*]] ]
; CHECK-NEXT:    [[REM85:%.*]] = urem i32 1, [[P_1]]
; CHECK-NEXT:    br label [[LOOP_2:%.*]]
; CHECK:       loop.2:
; CHECK-NEXT:    [[P_2:%.*]] = phi i32 [ 1, [[LOOP_1_HEADER]] ], [ 0, [[LOOP_2]] ]
; CHECK-NEXT:    [[ADD101:%.*]] = add i32 [[REM85]], [[P_2]]
; CHECK-NEXT:    br i1 false, label [[LOOP_2]], label [[LOOP_3_PREHEADER:%.*]]
; CHECK:       loop.3.preheader:
; CHECK-NEXT:    [[P_2_LCSSA:%.*]] = phi i32 [ [[P_2]], [[LOOP_2]] ]
; CHECK-NEXT:    [[ADD101_LCSSA:%.*]] = phi i32 [ [[ADD101]], [[LOOP_2]] ]
; CHECK-NEXT:    [[TMP0:%.*]] = udiv i32 1, [[P_1]]
; CHECK-NEXT:    [[TMP1:%.*]] = mul nuw i32 [[P_1]], [[TMP0]]
; CHECK-NEXT:    [[TMP2:%.*]] = add i32 [[TMP1]], -1
; CHECK-NEXT:    [[TMP3:%.*]] = sub i32 [[TMP2]], [[P_2_LCSSA]]
; CHECK-NEXT:    br i1 false, label [[SCALAR_PH:%.*]], label [[VECTOR_PH:%.*]]
; CHECK:       vector.ph:
; CHECK-NEXT:    [[IND_END:%.*]] = mul i32 196, [[TMP3]]
; CHECK-NEXT:    br label [[VECTOR_BODY:%.*]]
; CHECK:       vector.body:
; CHECK-NEXT:    [[INDEX:%.*]] = phi i32 [ 0, [[VECTOR_PH]] ], [ [[INDEX_NEXT:%.*]], [[VECTOR_BODY]] ]
; CHECK-NEXT:    [[INDEX_NEXT]] = add nuw i32 [[INDEX]], 4
; CHECK-NEXT:    [[TMP4:%.*]] = icmp eq i32 [[INDEX_NEXT]], 196
; CHECK-NEXT:    br i1 [[TMP4]], label [[MIDDLE_BLOCK:%.*]], label [[VECTOR_BODY]], !llvm.loop [[LOOP6:![0-9]+]]
; CHECK:       middle.block:
; CHECK-NEXT:    [[IND_ESCAPE:%.*]] = sub i32 [[IND_END]], [[TMP3]]
; CHECK-NEXT:    br i1 false, label [[LOOP_4_PREHEADER:%.*]], label [[SCALAR_PH]]
; CHECK:       scalar.ph:
; CHECK-NEXT:    [[BC_RESUME_VAL:%.*]] = phi i16 [ 196, [[MIDDLE_BLOCK]] ], [ 0, [[LOOP_3_PREHEADER]] ]
; CHECK-NEXT:    [[BC_RESUME_VAL1:%.*]] = phi i32 [ [[IND_END]], [[MIDDLE_BLOCK]] ], [ 0, [[LOOP_3_PREHEADER]] ]
; CHECK-NEXT:    br label [[LOOP_3:%.*]]
; CHECK:       loop.3:
; CHECK-NEXT:    [[IV_3:%.*]] = phi i16 [ [[INC_1:%.*]], [[LOOP_3]] ], [ [[BC_RESUME_VAL]], [[SCALAR_PH]] ]
; CHECK-NEXT:    [[IV_4:%.*]] = phi i32 [ [[SUB93_1:%.*]], [[LOOP_3]] ], [ [[BC_RESUME_VAL1]], [[SCALAR_PH]] ]
; CHECK-NEXT:    [[SUB93_1]] = sub i32 [[IV_4]], [[ADD101_LCSSA]]
; CHECK-NEXT:    [[INC_1]] = add i16 [[IV_3]], 1
; CHECK-NEXT:    [[CMP88_1:%.*]] = icmp ult i16 [[IV_3]], 198
; CHECK-NEXT:    br i1 [[CMP88_1]], label [[LOOP_3]], label [[LOOP_4_PREHEADER]], !llvm.loop [[LOOP7:![0-9]+]]
; CHECK:       loop.4.preheader:
; CHECK-NEXT:    [[IV_4_LCSSA:%.*]] = phi i32 [ [[IV_4]], [[LOOP_3]] ], [ [[IND_ESCAPE]], [[MIDDLE_BLOCK]] ]
; CHECK-NEXT:    br label [[LOOP_4:%.*]]
; CHECK:       loop.4:
; CHECK-NEXT:    [[IV_5:%.*]] = phi i32 [ [[SUB93_2]], [[LOOP_4]] ], [ 0, [[LOOP_4_PREHEADER]] ]
; CHECK-NEXT:    [[SUB93_2]] = sub i32 [[IV_5]], [[IV_4_LCSSA]]
; CHECK-NEXT:    br label [[LOOP_4]]
; CHECK:       loop.1.latch:
; CHECK-NEXT:    br label [[LOOP_1_HEADER]]
;
entry:
  br label %loop.1.header

loop.1.header:
  %p.1 = phi i32 [ 0, %entry ], [ %sub93.2, %loop.1.latch ]
  %rem85 = urem i32 1, %p.1
  br label %loop.2

loop.2:
  %p.2 = phi i32 [ 1, %loop.1.header ], [ 0, %loop.2 ]
  %add101 = add i32 %rem85, %p.2
  br i1 false, label %loop.2, label %loop.3

loop.3:
  %iv.3 = phi i16 [ 0, %loop.2 ], [ %inc.1, %loop.3 ]
  %iv.4 = phi i32 [ 0, %loop.2 ], [ %sub93.1, %loop.3 ]
  %sub93.1 = sub i32 %iv.4, %add101
  %inc.1 = add i16 %iv.3, 1
  %cmp88.1 = icmp ult i16 %iv.3, 198
  br i1 %cmp88.1, label %loop.3, label %loop.4

loop.4:
  %iv.5 = phi i32 [ 0, %loop.3 ], [ %sub93.2, %loop.4 ]
  %sub93.2 = sub i32 %iv.5, %iv.4
  br label %loop.4

loop.1.latch:                                 ; No predecessors!
  br label %loop.1.header
}