| ; RUN: opt %s -loop-vectorize -force-vector-interleave=1 -force-vector-width=4 -S | FileCheck %s |
| ; RUN: opt %s -loop-vectorize -force-vector-interleave=2 -force-vector-width=4 -S | FileCheck %s -check-prefix=UNROLL |
| |
| target datalayout = "e-m:e-i64:64-f80:128-n8:16:32:64-S128" |
| |
| @b = common global [1000 x i32] zeroinitializer, align 16 |
| @c = common global [1000 x i32] zeroinitializer, align 16 |
| @a = common global [1000 x i32] zeroinitializer, align 16 |
| |
| ; Generate min.iters.check to skip the vector loop and jump to scalar.ph directly when loop iteration number is less than VF * UF. |
| ; CHECK-LABEL: foo( |
| ; CHECK: %min.iters.check = icmp ult i64 %N, 4 |
| ; CHECK: br i1 %min.iters.check, label %scalar.ph, label %vector.ph |
| ; UNROLL-LABEL: foo( |
| ; UNROLL: %min.iters.check = icmp ult i64 %N, 8 |
| ; UNROLL: br i1 %min.iters.check, label %scalar.ph, label %vector.ph |
| |
| define void @foo(i64 %N) { |
| entry: |
| %cmp.8 = icmp sgt i64 %N, 0 |
| br i1 %cmp.8, label %for.body.preheader, label %for.end |
| |
| for.body.preheader: ; preds = %entry |
| br label %for.body |
| |
| for.body: ; preds = %for.body, %for.body.preheader |
| %i.09 = phi i64 [ %inc, %for.body ], [ 0, %for.body.preheader ] |
| %arrayidx = getelementptr inbounds [1000 x i32], [1000 x i32]* @b, i64 0, i64 %i.09 |
| %tmp = load i32, i32* %arrayidx, align 4 |
| %arrayidx1 = getelementptr inbounds [1000 x i32], [1000 x i32]* @c, i64 0, i64 %i.09 |
| %tmp1 = load i32, i32* %arrayidx1, align 4 |
| %add = add nsw i32 %tmp1, %tmp |
| %arrayidx2 = getelementptr inbounds [1000 x i32], [1000 x i32]* @a, i64 0, i64 %i.09 |
| store i32 %add, i32* %arrayidx2, align 4 |
| %inc = add nuw nsw i64 %i.09, 1 |
| %exitcond = icmp eq i64 %inc, %N |
| br i1 %exitcond, label %for.end.loopexit, label %for.body |
| |
| for.end.loopexit: ; preds = %for.body |
| br label %for.end |
| |
| for.end: ; preds = %for.end.loopexit, %entry |
| ret void |
| } |
