llvm/test/Transforms/LoopVectorize/induction_plus.ll

; RUN: opt < %s -loop-vectorize -force-vector-interleave=1 -force-vector-width=4 -S | FileCheck %s

target datalayout = "e-p:64:64:64-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:64:64-f32:32:32-f64:64:64-v64:64:64-v128:128:128-a0:0:64-s0:64:64-f80:128:128-n8:16:32:64-S128"

@array = common global [1024 x i32] zeroinitializer, align 16

;CHECK-LABEL: @array_at_plus_one(
;CHECK: %index = phi i64 [ 0, %vector.ph ], [ %index.next, %vector.body ]
;CHECK: [[VEC_IV_1:%.+]] = phi <4 x i64> [ <i64 0, i64 1, i64 2, i64 3>, %vector.ph ], [ [[VEC_IV_1_NEXT:%.+]], %vector.body ]
;CHECK: [[VEC_IV_2:%.+]] = phi <4 x i32> [ <i32 0, i32 1, i32 2, i32 3>, %vector.ph ], [ [[VEC_IV_2_NEXT:%.+]], %vector.body ]
;CHECK: %[[T1:.+]] = add i64 %index, 0
;CHECK: %[[T2:.+]] = add nsw i64 %[[T1]], 12
;CHECK: getelementptr inbounds [1024 x i32], [1024 x i32]* @array, i64 0, i64 %[[T2]]
;CHECK: [[VEC_IV_1_NEXT]] = add <4 x i64> [[VEC_IV_1]], <i64 4, i64 4, i64 4, i64 4>
;CHECK: [[VEC_IV_2_NEXT]] = add <4 x i32> [[VEC_IV_2]], <i32 4, i32 4, i32 4, i32 4>
;CHECK: ret i32
define i32 @array_at_plus_one(i32 %n) nounwind uwtable ssp {
  %1 = icmp sgt i32 %n, 0
  br i1 %1, label %.lr.ph, label %._crit_edge

.lr.ph:                                           ; preds = %0, %.lr.ph
  %indvars.iv = phi i64 [ %indvars.iv.next, %.lr.ph ], [ 0, %0 ]
  %2 = add nsw i64 %indvars.iv, 12
  %3 = getelementptr inbounds [1024 x i32], [1024 x i32]* @array, i64 0, i64 %2
  %4 = trunc i64 %indvars.iv to i32
  store i32 %4, i32* %3, align 4
  %indvars.iv.next = add i64 %indvars.iv, 1
  %lftr.wideiv = trunc i64 %indvars.iv.next to i32
  %exitcond = icmp eq i32 %lftr.wideiv, %n
  br i1 %exitcond, label %._crit_edge, label %.lr.ph

._crit_edge:                                      ; preds = %.lr.ph, %0
  ret i32 undef
}