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; RUN: opt -S -loop-vectorize -force-vector-interleave=1 -force-vector-width=4 -instsimplify -simplifycfg -simplifycfg-require-and-preserve-domtree=1 < %s | FileCheck %s
; Note: -instsimplify -simplifycfg -simplifycfg-require-and-preserve-domtree=1 remove the (now dead) original loop, making
; it easy to test that the llvm.loop.unroll.disable hint is still present.
target datalayout = "e-m:e-i64:64-f80:128-n8:16:32:64-S128"
; Function Attrs: norecurse nounwind uwtable
define void @foo(i32* nocapture %b) #0 {
entry:
br label %for.body
for.cond.cleanup: ; preds = %for.body
ret void
for.body: ; preds = %for.body, %entry
%indvars.iv = phi i64 [ 0, %entry ], [ %indvars.iv.next, %for.body ]
%arrayidx = getelementptr inbounds i32, i32* %b, i64 %indvars.iv
store i32 1, i32* %arrayidx, align 4
%indvars.iv.next = add nuw nsw i64 %indvars.iv, 1
%exitcond = icmp eq i64 %indvars.iv.next, 16
br i1 %exitcond, label %for.cond.cleanup, label %for.body, !llvm.loop !0
}
; CHECK-LABEL: @foo
; CHECK: = !{!"llvm.loop.unroll.disable"}
attributes #0 = { norecurse nounwind uwtable }
!0 = distinct !{!0, !1}
!1 = !{!"llvm.loop.unroll.disable"}
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