llvm/test/Transforms/LoopDistribute/no-reprocess.ll

; NOTE: Assertions have been autogenerated by utils/update_test_checks.py UTC_ARGS: --version 5
; RUN: opt -aa-pipeline=basic-aa -passes=loop-distribute -enable-loop-distribute -verify-loop-info -verify-dom-info -debug-only=loop-distribute --disable-output -S < %s 2>&1 | FileCheck %s
; REQUIRES: asserts

; Test if a loop already distributed will not reprocess because of metadata
; information marking it as processed.

; CHECK: LDist: Distributed loop guarded for reprocessing
; CHECK: LDist: Skipping;

define dso_local void @_Z13distribution3PiS_S_S_i(ptr noundef captures(none) %a, ptr noundef readonly captures(none) %b, ptr noundef captures(none) %c, ptr noundef writeonly captures(none) %d, i64 noundef signext %len) {
entry:
  %cmp = icmp sgt i64 %len, 0
  br i1 %cmp, label %end, label %for.body.lver.check

for.body.lver.check:                              ; preds = %entry
  %0 = shl i64 %len, 2
  %scevgep = getelementptr i8, ptr %a, i64 %0
  %scevgep1 = getelementptr i8, ptr %c, i64 -4
  %scevgep2 = getelementptr i8, ptr %c, i64 %0
  %scevgep3 = getelementptr i8, ptr %d, i64 %0
  %scevgep4 = getelementptr i8, ptr %b, i64 %0
  %bound0 = icmp ult ptr %a, %scevgep2
  %bound1 = icmp ult ptr %scevgep1, %scevgep
  %found.conflict = and i1 %bound0, %bound1
  %bound05 = icmp ult ptr %a, %scevgep3
  %bound16 = icmp ult ptr %d, %scevgep
  %found.conflict7 = and i1 %bound05, %bound16
  %conflict.rdx = or i1 %found.conflict, %found.conflict7
  %bound08 = icmp ult ptr %a, %scevgep4
  %bound19 = icmp ult ptr %b, %scevgep
  %found.conflict10 = and i1 %bound08, %bound19
  %conflict.rdx11 = or i1 %conflict.rdx, %found.conflict10
  %bound012 = icmp ult ptr %scevgep1, %scevgep3
  %bound113 = icmp ult ptr %d, %scevgep2
  %found.conflict14 = and i1 %bound012, %bound113
  %conflict.rdx15 = or i1 %conflict.rdx11, %found.conflict14
  %bound016 = icmp ult ptr %d, %scevgep4
  %bound117 = icmp ult ptr %b, %scevgep3
  %found.conflict18 = and i1 %bound016, %bound117
  %conflict.rdx19 = or i1 %conflict.rdx15, %found.conflict18
  br i1 %conflict.rdx19, label %for.body.ph.lver.orig, label %for.body.ph.ldist1

for.body.ph.lver.orig:                            ; preds = %for.body.lver.check
  br label %for.body.lver.orig

for.body.lver.orig:                               ; preds = %for.body.lver.orig, %for.body.ph.lver.orig
  %indvars.iv.lver.orig = phi i64 [ 0, %for.body.ph.lver.orig ], [ %indvars.iv.next.lver.orig, %for.body.lver.orig ]
  %arrayidx.lver.orig = getelementptr inbounds i32, ptr %b, i64 %indvars.iv.lver.orig
  %i2.lver.orig = load i32, ptr %arrayidx.lver.orig, align 4, !tbaa !0
  %add4.lver.orig = add nsw i32 %i2.lver.orig, 1
  %arrayidx8.lver.orig = getelementptr inbounds i32, ptr %a, i64 %indvars.iv.lver.orig
  store i32 %add4.lver.orig, ptr %arrayidx8.lver.orig, align 4, !tbaa !0
  %i3.lver.orig = getelementptr i32, ptr %c, i64 %indvars.iv.lver.orig
  %arrayidx17.lver.orig = getelementptr i8, ptr %i3.lver.orig, i64 -4
  %i4.lver.orig = load i32, ptr %arrayidx17.lver.orig, align 4, !tbaa !0
  %sub18.lver.orig = sub nsw i32 %add4.lver.orig, %i4.lver.orig
  store i32 %sub18.lver.orig, ptr %i3.lver.orig, align 4, !tbaa !0
  %i5.lver.orig = load i32, ptr %arrayidx8.lver.orig, align 4, !tbaa !0
  %add27.lver.orig = add nsw i32 %i5.lver.orig, 2
  %arrayidx31.lver.orig = getelementptr inbounds i32, ptr %d, i64 %indvars.iv.lver.orig
  store i32 %add27.lver.orig, ptr %arrayidx31.lver.orig, align 4, !tbaa !0
  %indvars.iv.next.lver.orig = add i64 %indvars.iv.lver.orig, 1
  %cmp1.not.lver.orig = icmp eq i64 %indvars.iv.next.lver.orig, %len
  br i1 %cmp1.not.lver.orig, label %end.loopexit.loopexit, label %for.body.lver.orig, !llvm.loop !4

for.body.ph.ldist1:                               ; preds = %for.body.lver.check
  br label %for.body.ldist1

for.body.ldist1:                                  ; preds = %for.body.ldist1, %for.body.ph.ldist1
  %indvars.iv.ldist1 = phi i64 [ 0, %for.body.ph.ldist1 ], [ %indvars.iv.next.ldist1, %for.body.ldist1 ]
  %arrayidx.ldist1 = getelementptr inbounds i32, ptr %b, i64 %indvars.iv.ldist1
  %i2.ldist1 = load i32, ptr %arrayidx.ldist1, align 4, !tbaa !0, !alias.scope !7
  %add4.ldist1 = add nsw i32 %i2.ldist1, 1
  %arrayidx8.ldist1 = getelementptr inbounds i32, ptr %a, i64 %indvars.iv.ldist1
  store i32 %add4.ldist1, ptr %arrayidx8.ldist1, align 4, !tbaa !0, !alias.scope !10, !noalias !12
  %i3.ldist1 = getelementptr i32, ptr %c, i64 %indvars.iv.ldist1
  %arrayidx17.ldist1 = getelementptr i8, ptr %i3.ldist1, i64 -4
  %i4.ldist1 = load i32, ptr %arrayidx17.ldist1, align 4, !tbaa !0, !alias.scope !15, !noalias !16
  %sub18.ldist1 = sub nsw i32 %add4.ldist1, %i4.ldist1
  store i32 %sub18.ldist1, ptr %i3.ldist1, align 4, !tbaa !0, !alias.scope !15, !noalias !16
  %indvars.iv.next.ldist1 = add i64 %indvars.iv.ldist1, 1
  %cmp1.not.ldist1 = icmp eq i64 %indvars.iv.next.ldist1, %len
  br i1 %cmp1.not.ldist1, label %for.body.ph, label %for.body.ldist1, !llvm.loop !17

for.body.ph:                                      ; preds = %for.body.ldist1
  br label %for.body

for.body:                                         ; preds = %for.body, %for.body.ph
  %indvars.iv = phi i64 [ 0, %for.body.ph ], [ %indvars.iv.next, %for.body ]
  %arrayidx8 = getelementptr inbounds i32, ptr %a, i64 %indvars.iv
  %i5 = load i32, ptr %arrayidx8, align 4, !tbaa !0, !alias.scope !10, !noalias !12
  %add27 = add nsw i32 %i5, 2
  %arrayidx31 = getelementptr inbounds i32, ptr %d, i64 %indvars.iv
  store i32 %add27, ptr %arrayidx31, align 4, !tbaa !0, !alias.scope !16, !noalias !7
  %indvars.iv.next = add i64 %indvars.iv, 1
  %cmp1.not = icmp eq i64 %indvars.iv.next, %len
  br i1 %cmp1.not, label %end.loopexit.loopexit20, label %for.body, !llvm.loop !17

end.loopexit.loopexit:                            ; preds = %for.body.lver.orig
  br label %end.loopexit

end.loopexit.loopexit20:                          ; preds = %for.body
  br label %end.loopexit

end.loopexit:                                     ; preds = %end.loopexit.loopexit20, %end.loopexit.loopexit
  br label %end

end:                                              ; preds = %end.loopexit, %entry
  ret void
}

!0 = !{!1, !1, i64 0}
!1 = !{!"int", !2, i64 0}
!2 = !{!"omnipotent char", !3, i64 0}
!3 = !{!"Simple C++ TBAA"}
!4 = distinct !{!4, !5, !6}
!5 = !{!"llvm.loop.mustprogress"}
!6 = !{!"llvm.loop.isdistributed", i32 1}
!7 = !{!8}
!8 = distinct !{!8, !9}
!9 = distinct !{!9, i1 false, !"LVerDomain"}
!10 = !{!11}
!11 = distinct !{!11, !9}
!12 = !{!13, !14, !8}
!13 = distinct !{!13, !9}
!14 = distinct !{!14, !9}
!15 = !{!13}
!16 = !{!14}
!17 = distinct !{!17, !5}