| ; RUN: opt < %s -loop-vectorize -force-vector-interleave=1 -force-vector-width=4 -dce -instcombine -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" |
| |
| @a = common global [2048 x i32] zeroinitializer, align 16 |
| @b = common global [2048 x i32] zeroinitializer, align 16 |
| @c = common global [2048 x i32] zeroinitializer, align 16 |
| |
| ;CHECK-LABEL: @example1( |
| ;CHECK: load <4 x i32> |
| ;CHECK: ret void |
| define void @example1() nounwind uwtable ssp { |
| br label %1 |
| |
| ; <label>:1 ; preds = %1, %0 |
| %indvars.iv = phi i64 [ 0, %0 ], [ %indvars.iv.next, %1 ] |
| %2 = getelementptr inbounds [2048 x i32], [2048 x i32]* @b, i64 0, i64 %indvars.iv |
| %3 = load i32, i32* %2, align 4 |
| %4 = getelementptr inbounds [2048 x i32], [2048 x i32]* @c, i64 0, i64 %indvars.iv |
| %5 = load i32, i32* %4, align 4 |
| %6 = add nsw i32 %5, %3 |
| %7 = getelementptr inbounds [2048 x i32], [2048 x i32]* @a, i64 0, i64 %indvars.iv |
| store i32 %6, i32* %7, 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, 8 ; <----- A really small trip count |
| br i1 %exitcond, label %8, label %1 ; w/o scalar iteration overhead. |
| |
| ; <label>:8 ; preds = %1 |
| ret void |
| } |
| |
| ;CHECK-LABEL: @bound1( |
| ;CHECK-NOT: load <4 x i32> |
| ;CHECK: ret void |
| define void @bound1(i32 %k) nounwind uwtable ssp { |
| br label %1 |
| |
| ; <label>:1 ; preds = %1, %0 |
| %indvars.iv = phi i64 [ 0, %0 ], [ %indvars.iv.next, %1 ] |
| %2 = getelementptr inbounds [2048 x i32], [2048 x i32]* @b, i64 0, i64 %indvars.iv |
| %3 = load i32, i32* %2, align 4 |
| %4 = getelementptr inbounds [2048 x i32], [2048 x i32]* @c, i64 0, i64 %indvars.iv |
| %5 = load i32, i32* %4, align 4 |
| %6 = add nsw i32 %5, %3 |
| %7 = getelementptr inbounds [2048 x i32], [2048 x i32]* @a, i64 0, i64 %indvars.iv |
| store i32 %6, i32* %7, align 4 |
| %indvars.iv.next = add i64 %indvars.iv, 1 |
| %lftr.wideiv = trunc i64 %indvars.iv.next to i32 |
| %large = icmp sge i32 %lftr.wideiv, 8 |
| %exitcond = icmp eq i32 %lftr.wideiv, %k |
| %realexit = or i1 %large, %exitcond |
| br i1 %realexit, label %8, label %1 |
| |
| ; <label>:8 ; preds = %1 |
| ret void |
| } |