test/Transforms/LICM/loopsink-phi.ll

; NOTE: Assertions have been autogenerated by utils/update_test_checks.py UTC_ARGS: --version 2
; RUN: opt -S -verify-memoryssa -passes=loop-sink < %s | FileCheck %s
; Make sure that unprofitable loop ICM can be undone by loop sink, and loop sink can handle
; sinking through PHI use.


define dso_local i32 @_Z3fooii(i32 %arg, i32 %arg1, i32 %arg2) local_unnamed_addr #0 !prof !29 {
; CHECK-LABEL: define dso_local i32 @_Z3fooii
; CHECK-SAME: (i32 [[ARG:%.*]], i32 [[ARG1:%.*]], i32 [[ARG2:%.*]]) local_unnamed_addr #[[ATTR0:[0-9]+]] !prof [[PROF29:![0-9]+]] {
; CHECK-NEXT:  .l.check.preheader:
; CHECK-NEXT:    br label [[DOTL_CHECK:%.*]]
; CHECK:       .l.ret.loopexit:
; CHECK-NEXT:    [[DOTLCSSA:%.*]] = phi i32 [ [[I10:%.*]], [[DOTL_ITERATE:%.*]] ]
; CHECK-NEXT:    ret i32 [[DOTLCSSA]]
; CHECK:       .l.check:
; CHECK-NEXT:    [[I4:%.*]] = phi i32 [ 0, [[DOTL_CHECK_PREHEADER:%.*]] ], [ [[I11:%.*]], [[DOTL_ITERATE]] ]
; CHECK-NEXT:    [[I5:%.*]] = phi i32 [ [[ARG]], [[DOTL_CHECK_PREHEADER]] ], [ [[I10]], [[DOTL_ITERATE]] ]
; CHECK-NEXT:    [[I6:%.*]] = icmp eq i32 [[I4]], [[ARG1]]
; CHECK-NEXT:    br i1 [[I6]], label [[DOTL_COLD:%.*]], label [[DOTL_ITERATE]], !prof [[PROF30:![0-9]+]]
; CHECK:       .l.cold:
; CHECK-NEXT:    [[FLAG:%.*]] = icmp eq i32 [[ARG1]], 5
; CHECK-NEXT:    br i1 [[FLAG]], label [[DOTL_COLD1:%.*]], label [[DOTL_COLD2:%.*]]
; CHECK:       .l.cold1:
; CHECK-NEXT:    [[TMP1:%.*]] = mul nsw i32 [[ARG2]], [[ARG2]]
; CHECK-NEXT:    br label [[DOTL_COLD3:%.*]]
; CHECK:       .l.cold2:
; CHECK-NEXT:    [[TMP2:%.*]] = add nsw i32 [[ARG2]], [[ARG2]]
; CHECK-NEXT:    br label [[DOTL_COLD3]]
; CHECK:       .l.cold3:
; CHECK-NEXT:    [[I7:%.*]] = phi i32 [ [[TMP1]], [[DOTL_COLD1]] ], [ [[TMP2]], [[DOTL_COLD2]] ]
; CHECK-NEXT:    [[I8:%.*]] = tail call i32 @_Z3bari(i32 [[I5]])
; CHECK-NEXT:    [[I9:%.*]] = add nsw i32 [[I8]], [[I7]]
; CHECK-NEXT:    br label [[DOTL_ITERATE]]
; CHECK:       .l.iterate:
; CHECK-NEXT:    [[I10]] = phi i32 [ [[I9]], [[DOTL_COLD3]] ], [ [[I5]], [[DOTL_CHECK]] ]
; CHECK-NEXT:    [[I11]] = add nuw nsw i32 [[I4]], 1
; CHECK-NEXT:    [[I12:%.*]] = icmp eq i32 [[I11]], [[I10]]
; CHECK-NEXT:    br i1 [[I12]], label [[DOTL_RET_LOOPEXIT:%.*]], label [[DOTL_CHECK]]
;

.l.check.preheader:
  %flag = icmp eq i32 %arg1, 5
  %tmp2 = add nsw i32 %arg2, %arg2
  %tmp1 = mul nsw i32 %arg2, %arg2
  br label %.l.check

.l.ret.loopexit:                                  ; preds = %.l.iterate
  %.lcssa = phi i32 [ %i10, %.l.iterate ]
  ret i32 %.lcssa

.l.check:                                         ; preds = %.l.iterate, %.l.check.preheader
  %i4 = phi i32 [ 0, %.l.check.preheader ], [ %i11, %.l.iterate ]
  %i5 = phi i32 [ %arg, %.l.check.preheader ], [ %i10, %.l.iterate ]
  %i6 = icmp eq i32 %i4, %arg1
  br i1 %i6, label %.l.cold, label %.l.iterate, !prof !30

.l.cold:                                          ; preds = %.l.check
  br i1 %flag, label %.l.cold1, label %.l.cold2

.l.cold1:                                         ; preds = %.l.cold
  br label %.l.cold3

.l.cold2:                                         ; preds = %.l.cold
  br label %.l.cold3

.l.cold3:                                         ; preds = %.l.cold2, %.l.cold1
  %i7 = phi i32 [ %tmp1, %.l.cold1 ], [ %tmp2, %.l.cold2 ]
  %i8 = tail call i32 @_Z3bari(i32 %i5)
  %i9 = add nsw i32 %i8, %i7
  br label %.l.iterate

.l.iterate:                                       ; preds = %.l.cold3, %.l.check
  %i10 = phi i32 [ %i9, %.l.cold3 ], [ %i5, %.l.check ]
  %i11 = add nuw nsw i32 %i4, 1
  %i12 = icmp eq i32 %i11, %i10
  br i1 %i12, label %.l.ret.loopexit, label %.l.check
}

declare dso_local i32 @_Z3bari(i32) local_unnamed_addr

attributes #0 = { "use-sample-profile" }

!llvm.module.flags = !{!0}

!0 = !{i32 1, !"ProfileSummary", !1}
!1 = !{!2, !3, !4, !5, !6, !7, !8, !9, !10, !11}
!2 = !{!"ProfileFormat", !"SampleProfile"}
!3 = !{!"TotalCount", i64 403}
!4 = !{!"MaxCount", i64 200}
!5 = !{!"MaxInternalCount", i64 0}
!6 = !{!"MaxFunctionCount", i64 1}
!7 = !{!"NumCounts", i64 6}
!8 = !{!"NumFunctions", i64 1}
!9 = !{!"IsPartialProfile", i64 0}
!10 = !{!"PartialProfileRatio", double 0.000000e+00}
!11 = !{!"DetailedSummary", !12}
!12 = !{!13, !14, !15, !16, !17, !18, !19, !20, !21, !22, !23, !24, !25, !26, !27, !28}
!13 = !{i32 10000, i64 200, i32 2}
!14 = !{i32 100000, i64 200, i32 2}
!15 = !{i32 200000, i64 200, i32 2}
!16 = !{i32 300000, i64 200, i32 2}
!17 = !{i32 400000, i64 200, i32 2}
!18 = !{i32 500000, i64 200, i32 2}
!19 = !{i32 600000, i64 200, i32 2}
!20 = !{i32 700000, i64 200, i32 2}
!21 = !{i32 800000, i64 200, i32 2}
!22 = !{i32 900000, i64 200, i32 2}
!23 = !{i32 950000, i64 200, i32 2}
!24 = !{i32 990000, i64 200, i32 2}
!25 = !{i32 999000, i64 1, i32 5}
!26 = !{i32 999900, i64 1, i32 5}
!27 = !{i32 999990, i64 1, i32 5}
!28 = !{i32 999999, i64 1, i32 5}
!29 = !{!"function_entry_count", i64 2}
!30 = !{!"branch_weights", i32 1, i32 201}