test/Transforms/SLPVectorizer/X86/no_alternate_divrem.ll

; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
; RUN: opt < %s -slp-vectorizer -slp-threshold=-200 -mtriple=x86_64-unknown-linux -mcpu=core-avx2 -S | FileCheck %s

define void @test_add_sdiv(i32 *%arr1, i32 *%arr2, i32 %a0, i32 %a1, i32 %a2, i32 %a3) {
; CHECK-LABEL: @test_add_sdiv(
; CHECK-NEXT:  entry:
; CHECK-NEXT:    [[GEP1_0:%.*]] = getelementptr i32, i32* [[ARR1:%.*]], i32 0
; CHECK-NEXT:    [[GEP1_1:%.*]] = getelementptr i32, i32* [[ARR1]], i32 1
; CHECK-NEXT:    [[GEP1_2:%.*]] = getelementptr i32, i32* [[ARR1]], i32 2
; CHECK-NEXT:    [[GEP1_3:%.*]] = getelementptr i32, i32* [[ARR1]], i32 3
; CHECK-NEXT:    [[GEP2_0:%.*]] = getelementptr i32, i32* [[ARR2:%.*]], i32 0
; CHECK-NEXT:    [[GEP2_1:%.*]] = getelementptr i32, i32* [[ARR2]], i32 1
; CHECK-NEXT:    [[GEP2_2:%.*]] = getelementptr i32, i32* [[ARR2]], i32 2
; CHECK-NEXT:    [[GEP2_3:%.*]] = getelementptr i32, i32* [[ARR2]], i32 3
; CHECK-NEXT:    [[V0:%.*]] = load i32, i32* [[GEP1_0]]
; CHECK-NEXT:    [[V1:%.*]] = load i32, i32* [[GEP1_1]]
; CHECK-NEXT:    [[V2:%.*]] = load i32, i32* [[GEP1_2]]
; CHECK-NEXT:    [[V3:%.*]] = load i32, i32* [[GEP1_3]]
; CHECK-NEXT:    [[Y0:%.*]] = add nsw i32 [[A0:%.*]], 1146
; CHECK-NEXT:    [[Y1:%.*]] = add nsw i32 [[A1:%.*]], 146
; CHECK-NEXT:    [[Y2:%.*]] = add nsw i32 [[A2:%.*]], 42
; CHECK-NEXT:    [[Y3:%.*]] = add nsw i32 [[A3:%.*]], 0
; CHECK-NEXT:    [[RES0:%.*]] = add nsw i32 [[V0]], [[Y0]]
; CHECK-NEXT:    [[RES1:%.*]] = add nsw i32 [[V1]], [[Y1]]
; CHECK-NEXT:    [[RES2:%.*]] = sdiv i32 [[V2]], [[Y2]]
; CHECK-NEXT:    [[RES3:%.*]] = add nsw i32 [[V3]], [[Y3]]
; CHECK-NEXT:    store i32 [[RES0]], i32* [[GEP2_0]]
; CHECK-NEXT:    store i32 [[RES1]], i32* [[GEP2_1]]
; CHECK-NEXT:    store i32 [[RES2]], i32* [[GEP2_2]]
; CHECK-NEXT:    store i32 [[RES3]], i32* [[GEP2_3]]
; CHECK-NEXT:    ret void
;
entry:
  %gep1.0 = getelementptr i32, i32* %arr1, i32 0
  %gep1.1 = getelementptr i32, i32* %arr1, i32 1
  %gep1.2 = getelementptr i32, i32* %arr1, i32 2
  %gep1.3 = getelementptr i32, i32* %arr1, i32 3
  %gep2.0 = getelementptr i32, i32* %arr2, i32 0
  %gep2.1 = getelementptr i32, i32* %arr2, i32 1
  %gep2.2 = getelementptr i32, i32* %arr2, i32 2
  %gep2.3 = getelementptr i32, i32* %arr2, i32 3
  %v0 = load i32, i32* %gep1.0
  %v1 = load i32, i32* %gep1.1
  %v2 = load i32, i32* %gep1.2
  %v3 = load i32, i32* %gep1.3
  %y0 = add nsw i32 %a0, 1146
  %y1 = add nsw i32 %a1, 146
  %y2 = add nsw i32 %a2, 42
  ;; %y3 is zero if %a3 is zero
  %y3 = add nsw i32 %a3, 0
  %res0 = add nsw i32 %v0, %y0
  %res1 = add nsw i32 %v1, %y1
  ;; As such, doing alternate shuffling would be incorrect:
  ;;   %vadd = add nsw %v[0-3], %y[0-3]
  ;;   %vsdiv = sdiv %v[0-3], %y[0-3]
  ;;   %result = shuffle %vadd, %vsdiv, <mask>
  ;; would be illegal.
  %res2 = sdiv i32 %v2, %y2
  %res3 = add nsw i32 %v3, %y3
  store i32 %res0, i32* %gep2.0
  store i32 %res1, i32* %gep2.1
  store i32 %res2, i32* %gep2.2
  store i32 %res3, i32* %gep2.3
  ret void
}

;; Similar test, but now div/rem is main opcode and not the alternate one. Same issue.
define void @test_urem_add(i32 *%arr1, i32 *%arr2, i32 %a0, i32 %a1, i32 %a2, i32 %a3) {
; CHECK-LABEL: @test_urem_add(
; CHECK-NEXT:  entry:
; CHECK-NEXT:    [[GEP1_0:%.*]] = getelementptr i32, i32* [[ARR1:%.*]], i32 0
; CHECK-NEXT:    [[GEP1_1:%.*]] = getelementptr i32, i32* [[ARR1]], i32 1
; CHECK-NEXT:    [[GEP1_2:%.*]] = getelementptr i32, i32* [[ARR1]], i32 2
; CHECK-NEXT:    [[GEP1_3:%.*]] = getelementptr i32, i32* [[ARR1]], i32 3
; CHECK-NEXT:    [[GEP2_0:%.*]] = getelementptr i32, i32* [[ARR2:%.*]], i32 0
; CHECK-NEXT:    [[GEP2_1:%.*]] = getelementptr i32, i32* [[ARR2]], i32 1
; CHECK-NEXT:    [[GEP2_2:%.*]] = getelementptr i32, i32* [[ARR2]], i32 2
; CHECK-NEXT:    [[GEP2_3:%.*]] = getelementptr i32, i32* [[ARR2]], i32 3
; CHECK-NEXT:    [[V0:%.*]] = load i32, i32* [[GEP1_0]]
; CHECK-NEXT:    [[V1:%.*]] = load i32, i32* [[GEP1_1]]
; CHECK-NEXT:    [[V2:%.*]] = load i32, i32* [[GEP1_2]]
; CHECK-NEXT:    [[V3:%.*]] = load i32, i32* [[GEP1_3]]
; CHECK-NEXT:    [[Y0:%.*]] = add nsw i32 [[A0:%.*]], 1146
; CHECK-NEXT:    [[Y1:%.*]] = add nsw i32 [[A1:%.*]], 146
; CHECK-NEXT:    [[Y2:%.*]] = add nsw i32 [[A2:%.*]], 42
; CHECK-NEXT:    [[Y3:%.*]] = add nsw i32 [[A3:%.*]], 0
; CHECK-NEXT:    [[RES0:%.*]] = urem i32 [[V0]], [[Y0]]
; CHECK-NEXT:    [[RES1:%.*]] = urem i32 [[V1]], [[Y1]]
; CHECK-NEXT:    [[RES2:%.*]] = urem i32 [[V2]], [[Y2]]
; CHECK-NEXT:    [[RES3:%.*]] = add nsw i32 [[V3]], [[Y3]]
; CHECK-NEXT:    store i32 [[RES0]], i32* [[GEP2_0]]
; CHECK-NEXT:    store i32 [[RES1]], i32* [[GEP2_1]]
; CHECK-NEXT:    store i32 [[RES2]], i32* [[GEP2_2]]
; CHECK-NEXT:    store i32 [[RES3]], i32* [[GEP2_3]]
; CHECK-NEXT:    ret void
;
entry:
  %gep1.0 = getelementptr i32, i32* %arr1, i32 0
  %gep1.1 = getelementptr i32, i32* %arr1, i32 1
  %gep1.2 = getelementptr i32, i32* %arr1, i32 2
  %gep1.3 = getelementptr i32, i32* %arr1, i32 3
  %gep2.0 = getelementptr i32, i32* %arr2, i32 0
  %gep2.1 = getelementptr i32, i32* %arr2, i32 1
  %gep2.2 = getelementptr i32, i32* %arr2, i32 2
  %gep2.3 = getelementptr i32, i32* %arr2, i32 3
  %v0 = load i32, i32* %gep1.0
  %v1 = load i32, i32* %gep1.1
  %v2 = load i32, i32* %gep1.2
  %v3 = load i32, i32* %gep1.3
  %y0 = add nsw i32 %a0, 1146
  %y1 = add nsw i32 %a1, 146
  %y2 = add nsw i32 %a2, 42
  ;; %y3 is zero if %a3 is zero
  %y3 = add nsw i32 %a3, 0
  %res0 = urem i32 %v0, %y0
  %res1 = urem i32 %v1, %y1
  %res2 = urem i32 %v2, %y2
  ;; As such, doing alternate shuffling would be incorrect:
  ;;   %vurem = urem %v[0-3], %y[0-3]
  ;;   %vadd = add nsw %v[0-3], %y[0-3]
  ;;   %result = shuffle %vurem, %vadd, <mask>
  ;; would be illegal.
  %res3 = add nsw i32 %v3, %y3
  store i32 %res0, i32* %gep2.0
  store i32 %res1, i32* %gep2.1
  store i32 %res2, i32* %gep2.2
  store i32 %res3, i32* %gep2.3
  ret void
}