1; RUN: opt -S -loop-vectorize -instcombine -force-vector-width=4 -force-vector-interleave=1 -enable-interleaved-mem-accesses=true < %s | FileCheck %s 2 3target datalayout = "e-m:e-i64:64-f80:128-n8:16:32:64-S128" 4 5; Check that the interleaved-mem-access analysis currently does not create an 6; interleave group for access 'a' due to the possible pointer wrap-around. 7; 8; To begin with, in this test the candidate interleave group can be created 9; only when getPtrStride is called with Assume=true. Next, because 10; the interleave-group of the loads is not full (has gaps), we also need to check 11; for possible pointer wrapping. Here we currently use Assume=false and as a 12; result cannot prove the transformation is safe and therefore invalidate the 13; candidate interleave group. 14; 15; FIXME: This is a missed optimization. Once we use Assume=true here, we will 16; not have to invalidate the group. 17 18; void func(unsigned * __restrict a, unsigned * __restrict b, unsigned char x, unsigned char y) { 19; int i = 0; 20; for (unsigned char index = x; i < y; index +=2, ++i) 21; b[i] = a[index] * 2; 22; 23; } 24 25; CHECK: vector.body: 26; CHECK-NOT: %wide.vec = load <8 x i32>, <8 x i32>* {{.*}}, align 4 27; CHECK-NOT: shufflevector <8 x i32> %wide.vec, <8 x i32> undef, <4 x i32> <i32 0, i32 2, i32 4, i32 6> 28 29define void @_Z4funcPjS_hh(i32* noalias nocapture readonly %a, i32* noalias nocapture %b, i8 zeroext %x, i8 zeroext %y) local_unnamed_addr { 30entry: 31 %cmp9 = icmp eq i8 %y, 0 32 br i1 %cmp9, label %for.cond.cleanup, label %for.body.preheader 33 34for.body.preheader: 35 %wide.trip.count = zext i8 %y to i64 36 br label %for.body 37 38for.cond.cleanup.loopexit: 39 br label %for.cond.cleanup 40 41for.cond.cleanup: 42 ret void 43 44for.body: 45 %indvars.iv = phi i64 [ %indvars.iv.next, %for.body ], [ 0, %for.body.preheader ] 46 %index.011 = phi i8 [ %add, %for.body ], [ %x, %for.body.preheader ] 47 %idxprom = zext i8 %index.011 to i64 48 %arrayidx = getelementptr inbounds i32, i32* %a, i64 %idxprom 49 %0 = load i32, i32* %arrayidx, align 4 50 %mul = shl i32 %0, 1 51 %arrayidx2 = getelementptr inbounds i32, i32* %b, i64 %indvars.iv 52 store i32 %mul, i32* %arrayidx2, align 4 53 %add = add i8 %index.011, 2 54 %indvars.iv.next = add nuw nsw i64 %indvars.iv, 1 55 %exitcond = icmp eq i64 %indvars.iv.next, %wide.trip.count 56 br i1 %exitcond, label %for.cond.cleanup.loopexit, label %for.body 57} 58