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

; Test that SLP vectorizer doesn't crash when getPointersDiff returns
; std::nullopt for pointers that can't be compared.

target datalayout = "e-m:e-p270:32:32-p271:32:32-p272:64:64-i64:64-i128:128-f80:128-n8:16:32:64-S128"
target triple = "x86_64-unknown-linux-gnu"

define void @test(i64 %arg0, i64 %arg1) {
; CHECK-LABEL: @test(
; CHECK-NEXT:  entry:
; CHECK-NEXT:    [[INIT:%.*]] = add i64 [[ARG0:%.*]], 1
; CHECK-NEXT:    br label [[LOOP:%.*]]
; CHECK:       loop:
; CHECK-NEXT:    [[IV:%.*]] = phi i64 [ [[INIT]], [[ENTRY:%.*]] ], [ [[IV_NEXT:%.*]], [[REDUCE:%.*]] ]
; CHECK-NEXT:    [[COUNTER:%.*]] = phi i64 [ 1, [[ENTRY]] ], [ [[COUNTER_NEXT:%.*]], [[REDUCE]] ]
; CHECK-NEXT:    [[OFF0:%.*]] = add i64 [[IV]], -4
; CHECK-NEXT:    [[PTR:%.*]] = call ptr null(ptr null, ptr null)
; CHECK-NEXT:    [[IDX0:%.*]] = add i64 [[ARG1:%.*]], [[OFF0]]
; CHECK-NEXT:    [[IDX0_SCALED:%.*]] = shl i64 [[IDX0]], 3
; CHECK-NEXT:    [[GEP0:%.*]] = getelementptr i8, ptr [[PTR]], i64 [[IDX0_SCALED]]
; CHECK-NEXT:    [[GEP0_OFF:%.*]] = getelementptr i8, ptr [[GEP0]], i64 -8
; CHECK-NEXT:    [[TMP0:%.*]] = load <4 x double>, ptr [[GEP0_OFF]], align 8
; CHECK-NEXT:    [[IDX4:%.*]] = add i64 [[ARG1]], [[IV]]
; CHECK-NEXT:    [[IDX4_SCALED:%.*]] = shl i64 [[IDX4]], 3
; CHECK-NEXT:    [[GEP4:%.*]] = getelementptr i8, ptr [[PTR]], i64 [[IDX4_SCALED]]
; CHECK-NEXT:    [[GEP4_OFF:%.*]] = getelementptr i8, ptr [[GEP4]], i64 -8
; CHECK-NEXT:    [[LOAD4:%.*]] = load double, ptr [[GEP4_OFF]], align 8
; CHECK-NEXT:    [[LOAD5:%.*]] = load double, ptr [[GEP4]], align 8
; CHECK-NEXT:    br label [[REDUCE]]
; CHECK:       dead:
; CHECK-NEXT:    br label [[REDUCE]]
; CHECK:       reduce:
; CHECK-NEXT:    [[PHI4:%.*]] = phi double [ [[LOAD4]], [[LOOP]] ], [ 0.000000e+00, [[DEAD:%.*]] ]
; CHECK-NEXT:    [[PHI5:%.*]] = phi double [ [[LOAD5]], [[LOOP]] ], [ 0.000000e+00, [[DEAD]] ]
; CHECK-NEXT:    [[TMP1:%.*]] = phi <4 x double> [ [[TMP0]], [[LOOP]] ], [ poison, [[DEAD]] ]
; CHECK-NEXT:    [[TMP2:%.*]] = call double @llvm.vector.reduce.fminimum.v4f64(<4 x double> [[TMP1]])
; CHECK-NEXT:    [[TMP3:%.*]] = call double @llvm.minimum.f64(double [[TMP2]], double [[PHI4]])
; CHECK-NEXT:    [[TMP4:%.*]] = call double @llvm.minimum.f64(double [[PHI5]], double 0.000000e+00)
; CHECK-NEXT:    [[TMP5:%.*]] = call double @llvm.minimum.f64(double [[TMP3]], double [[TMP4]])
; CHECK-NEXT:    [[MIN6:%.*]] = call double @llvm.minimum.f64(double [[TMP5]], double 0.000000e+00)
; CHECK-NEXT:    [[COUNTER_NEXT]] = add i64 [[COUNTER]], 1
; CHECK-NEXT:    [[IV_NEXT]] = add i64 [[COUNTER]], [[INIT]]
; CHECK-NEXT:    br label [[LOOP]]
;
entry:
  %init = add i64 %arg0, 1
  br label %loop

loop:
  %iv = phi i64 [ %init, %entry ], [ %iv.next, %reduce ]
  %counter = phi i64 [ 1, %entry ], [ %counter.next, %reduce ]
  %off0 = add i64 %iv, -4
  %off1 = add i64 %iv, -3
  %off2 = add i64 %iv, -2
  %off3 = add i64 %iv, -1
  %ptr = call ptr null(ptr null, ptr null)
  %idx0 = add i64 %arg1, %off0
  %idx0.scaled = shl i64 %idx0, 3
  %gep0 = getelementptr i8, ptr %ptr, i64 %idx0.scaled
  %gep0.off = getelementptr i8, ptr %gep0, i64 -8
  %load0 = load double, ptr %gep0.off, align 8
  %idx1 = add i64 %arg1, %off1
  %idx1.scaled = shl i64 %idx1, 3
  %gep1 = getelementptr i8, ptr %ptr, i64 %idx1.scaled
  %gep1.off = getelementptr i8, ptr %gep1, i64 -8
  %load1 = load double, ptr %gep1.off, align 8
  %idx2 = add i64 %arg1, %off2
  %idx2.scaled = shl i64 %idx2, 3
  %gep2 = getelementptr i8, ptr %ptr, i64 %idx2.scaled
  %gep2.off = getelementptr i8, ptr %gep2, i64 -8
  %load2 = load double, ptr %gep2.off, align 8
  %idx3 = add i64 %arg1, %off3
  %idx3.scaled = shl i64 %idx3, 3
  %gep3 = getelementptr i8, ptr %ptr, i64 %idx3.scaled
  %gep3.off = getelementptr i8, ptr %gep3, i64 -8
  %load3 = load double, ptr %gep3.off, align 8
  %idx4 = add i64 %arg1, %iv
  %idx4.scaled = shl i64 %idx4, 3
  %gep4 = getelementptr i8, ptr %ptr, i64 %idx4.scaled
  %gep4.off = getelementptr i8, ptr %gep4, i64 -8
  %load4 = load double, ptr %gep4.off, align 8
  %load5 = load double, ptr %gep4, align 8
  br label %reduce

dead:
  br label %reduce

reduce:
  %phi0 = phi double [ %load0, %loop ], [ 0.000000e+00, %dead ]
  %phi1 = phi double [ %load1, %loop ], [ 0.000000e+00, %dead ]
  %phi2 = phi double [ %load2, %loop ], [ 0.000000e+00, %dead ]
  %phi3 = phi double [ %load3, %loop ], [ 0.000000e+00, %dead ]
  %phi4 = phi double [ %load4, %loop ], [ 0.000000e+00, %dead ]
  %phi5 = phi double [ %load5, %loop ], [ 0.000000e+00, %dead ]
  %min0 = call double @llvm.minimum.f64(double 0.000000e+00, double %phi0)
  %min1 = call double @llvm.minimum.f64(double %min0, double %phi1)
  %min2 = call double @llvm.minimum.f64(double %min1, double %phi2)
  %min3 = call double @llvm.minimum.f64(double %min2, double %phi3)
  %min4 = call double @llvm.minimum.f64(double %min3, double %phi4)
  %min5 = call double @llvm.minimum.f64(double %min4, double %phi5)
  %min6 = call double @llvm.minimum.f64(double %min5, double 0.000000e+00)
  %counter.next = add i64 %counter, 1
  %iv.next = add i64 %counter, %init
  br label %loop
}

declare double @llvm.minimum.f64(double, double)