1; REQUIRES: asserts 2; RUN: opt -passes=loop-vectorize -force-ordered-reductions=true -force-vector-width=1 -S < %s -debug 2> %t.debug | FileCheck %s 3; RUN: cat %t.debug | FileCheck %s --check-prefix=CHECK-DEBUG 4 5target triple = "aarch64-unknown-linux-gnu" 6 7; CHECK-DEBUG: LV: Not interleaving scalar ordered reductions. 8 9define void @foo(ptr noalias nocapture %dst, ptr noalias nocapture readonly %src, i64 %M, i64 %N) { 10; CHECK-LABEL: @foo( 11; CHECK-NOT: vector.body 12 13entry: 14 br label %for.body.us 15 16for.body.us: ; preds = %entry, %for.cond3 17 %i.023.us = phi i64 [ %inc8.us, %for.cond3 ], [ 0, %entry ] 18 %arrayidx.us = getelementptr inbounds float, ptr %dst, i64 %i.023.us 19 %mul.us = mul nsw i64 %i.023.us, %N 20 br label %for.body3.us 21 22for.body3.us: ; preds = %for.body.us, %for.body3.us 23 %0 = phi float [ 0.000000e+00, %for.body.us ], [ %add6.us, %for.body3.us ] 24 %j.021.us = phi i64 [ 0, %for.body.us ], [ %inc.us, %for.body3.us ] 25 %add.us = add nsw i64 %j.021.us, %mul.us 26 %arrayidx4.us = getelementptr inbounds float, ptr %src, i64 %add.us 27 %1 = load float, ptr %arrayidx4.us, align 4 28 %add6.us = fadd float %1, %0 29 %inc.us = add nuw nsw i64 %j.021.us, 1 30 %exitcond.not = icmp eq i64 %inc.us, %N 31 br i1 %exitcond.not, label %for.cond3, label %for.body3.us 32 33for.cond3: ; preds = %for.body3.us 34 %add6.us.lcssa = phi float [ %add6.us, %for.body3.us ] 35 store float %add6.us.lcssa, ptr %arrayidx.us, align 4 36 %inc8.us = add nuw nsw i64 %i.023.us, 1 37 %exitcond26.not = icmp eq i64 %inc8.us, %M 38 br i1 %exitcond26.not, label %exit, label %for.body.us 39 40exit: ; preds = %for.cond3 41 ret void 42} 43