1; Check that we won't interleave by more than half the "best known" estimated trip count. 2 3; 4; The loop is expected to be vectorized by 4 and computed interleaving factor is 1. 5; Thus the resulting step is 4. 6; RUN: opt -passes=loop-vectorize -force-vector-width=4 -vectorizer-min-trip-count=4 -S < %s | FileCheck %s 7 8; The loop is expected to be vectorized by 2 and computed interleaving factor is 2. 9; Thus the resulting step is 4. 10; RUN: opt -passes=loop-vectorize -force-vector-width=2 -vectorizer-min-trip-count=4 -S < %s | FileCheck %s 11 12; Check that we won't interleave by more than "best known" estimated trip count. 13 14target datalayout = "e-m:e-p270:32:32-p271:32:32-p272:64:64-i64:64-f80:128-n8:16:32:64-S128" 15target triple = "x86_64-unknown-linux-gnu" 16 17@a = dso_local global [5 x i32] zeroinitializer, align 16 18@b = dso_local global [5 x i32] zeroinitializer, align 16 19 20; Function Attrs: nofree norecurse nounwind uwtable 21define dso_local void @_Z3fooi(i32 %M) local_unnamed_addr { 22; CHECK-LABEL: @_Z3fooi( 23; CHECK: [[VECTOR_BODY:vector\.body]]: 24; CHECK: [[INDEX:%.*]] = phi i64 [ 0, [[VECTOR_PH:%.*]] ], [ [[INDEX_NEXT:%.*]], %[[VECTOR_BODY]] ] 25; CHECK: [[INDEX_NEXT]] = add nuw i64 [[INDEX]], 4 26; 27entry: 28 %cmp8 = icmp sgt i32 %M, 0 29 br i1 %cmp8, label %for.body.preheader, label %for.cond.cleanup 30 31for.body.preheader: ; preds = %entry 32 %wide.trip.count = zext i32 %M to i64 33 br label %for.body 34 35for.cond.cleanup.loopexit: ; preds = %for.body 36 br label %for.cond.cleanup 37 38for.cond.cleanup: ; preds = %for.cond.cleanup.loopexit, %entry 39 ret void 40 41for.body: ; preds = %for.body, %for.body.preheader 42 %indvars.iv = phi i64 [ 0, %for.body.preheader ], [ %indvars.iv.next, %for.body ] 43 %arrayidx = getelementptr inbounds [5 x i32], ptr @b, i64 0, i64 %indvars.iv 44 %0 = load i32, ptr %arrayidx, align 4 45 %1 = trunc i64 %indvars.iv to i32 46 %mul = mul nsw i32 %0, %1 47 %arrayidx2 = getelementptr inbounds [5 x i32], ptr @a, i64 0, i64 %indvars.iv 48 %2 = load i32, ptr %arrayidx2, align 4 49 %add = add nsw i32 %2, %mul 50 store i32 %add, ptr %arrayidx2, align 4 51 %indvars.iv.next = add nuw nsw i64 %indvars.iv, 1 52 %exitcond = icmp eq i64 %indvars.iv.next, %wide.trip.count 53 br i1 %exitcond, label %for.cond.cleanup.loopexit, label %for.body, !prof !1 54} 55 56!1 = !{!"branch_weights", i32 1, i32 9} 57