1; REQUIRES: asserts 2; RUN: opt < %s -force-vector-width=2 -force-vector-interleave=1 -loop-vectorize -S --debug-only=loop-vectorize 2>&1 | FileCheck %s 3 4; This test shows extremely high interleaving cost that, probably, should be fixed. 5; Due to the high cost, interleaving is not beneficial and the cost model chooses to scalarize 6; the load instructions. 7 8target datalayout = "e-m:e-i8:8:32-i16:16:32-i64:64-i128:128-n32:64-S128" 9target triple = "aarch64--linux-gnu" 10 11%pair = type { i8, i8 } 12 13; CHECK-LABEL: test 14; CHECK: Found an estimated cost of 20 for VF 2 For instruction: {{.*}} load i8 15; CHECK: Found an estimated cost of 0 for VF 2 For instruction: {{.*}} load i8 16; CHECK: vector.body 17; CHECK: load i8 18; CHECK: br i1 {{.*}}, label %middle.block, label %vector.body 19 20define void @test(%pair* %p, i64 %n) { 21entry: 22 br label %for.body 23 24for.body: 25 %i = phi i64 [ 0, %entry ], [ %i.next, %for.body ] 26 %tmp0 = getelementptr %pair, %pair* %p, i64 %i, i32 0 27 %tmp1 = load i8, i8* %tmp0, align 1 28 %tmp2 = getelementptr %pair, %pair* %p, i64 %i, i32 1 29 %tmp3 = load i8, i8* %tmp2, align 1 30 %i.next = add nuw nsw i64 %i, 1 31 %cond = icmp eq i64 %i.next, %n 32 br i1 %cond, label %for.end, label %for.body 33 34for.end: 35 ret void 36} 37 38