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; REQUIRES: asserts
; RUN: opt -loop-vectorize -force-ordered-reductions=true -force-vector-width=1 -S < %s -debug 2> %t.debug | FileCheck %s
; RUN: cat %t.debug | FileCheck %s --check-prefix=CHECK-DEBUG
target triple = "aarch64-unknown-linux-gnu"
; CHECK-DEBUG: LV: Not interleaving scalar ordered reductions.
define void @foo(float* noalias nocapture %dst, float* noalias nocapture readonly %src, i64 %M, i64 %N) {
; CHECK-LABEL: @foo(
; CHECK-NOT: vector.body
entry:
br label %for.body.us
for.body.us: ; preds = %entry, %for.cond3
%i.023.us = phi i64 [ %inc8.us, %for.cond3 ], [ 0, %entry ]
%arrayidx.us = getelementptr inbounds float, float* %dst, i64 %i.023.us
%mul.us = mul nsw i64 %i.023.us, %N
br label %for.body3.us
for.body3.us: ; preds = %for.body.us, %for.body3.us
%0 = phi float [ 0.000000e+00, %for.body.us ], [ %add6.us, %for.body3.us ]
%j.021.us = phi i64 [ 0, %for.body.us ], [ %inc.us, %for.body3.us ]
%add.us = add nsw i64 %j.021.us, %mul.us
%arrayidx4.us = getelementptr inbounds float, float* %src, i64 %add.us
%1 = load float, float* %arrayidx4.us, align 4
%add6.us = fadd float %1, %0
%inc.us = add nuw nsw i64 %j.021.us, 1
%exitcond.not = icmp eq i64 %inc.us, %N
br i1 %exitcond.not, label %for.cond3, label %for.body3.us
for.cond3: ; preds = %for.body3.us
%add6.us.lcssa = phi float [ %add6.us, %for.body3.us ]
store float %add6.us.lcssa, float* %arrayidx.us, align 4
%inc8.us = add nuw nsw i64 %i.023.us, 1
%exitcond26.not = icmp eq i64 %inc8.us, %M
br i1 %exitcond26.not, label %exit, label %for.body.us
exit: ; preds = %for.cond3
ret void
}
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