llvm/test/Transforms/LoopDistribute/pointer-phi-in-loop.ll

; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
; RUN: opt -aa-pipeline=basic-aa -passes=loop-distribute -enable-loop-distribute -verify-loop-info -verify-dom-info -S %s | FileCheck %s

; Testcases inspired by PR50296, PR50288.

define void @phi_load_store_distribute(i1 %cond, ptr %A, ptr %B, ptr %C) {
; CHECK-LABEL: @phi_load_store_distribute(
; CHECK-NEXT:  entry:
; CHECK-NEXT:    br label [[FOR_BODY:%.*]]
; CHECK:       for.body.lver.check:
; CHECK-NEXT:    [[SCEVGEP:%.*]] = getelementptr i8, ptr [[A:%.*]], i64 2
; CHECK-NEXT:    [[SCEVGEP1:%.*]] = getelementptr i8, ptr [[C:%.*]], i64 2
; CHECK-NEXT:    [[SCEVGEP2:%.*]] = getelementptr i8, ptr [[B:%.*]], i64 2
; CHECK-NEXT:    [[BOUND0:%.*]] = icmp ult ptr [[A]], [[SCEVGEP1]]
; CHECK-NEXT:    [[BOUND1:%.*]] = icmp ult ptr [[C]], [[SCEVGEP]]
; CHECK-NEXT:    [[FOUND_CONFLICT:%.*]] = and i1 [[BOUND0]], [[BOUND1]]
; CHECK-NEXT:    [[BOUND03:%.*]] = icmp ult ptr [[A]], [[SCEVGEP2]]
; CHECK-NEXT:    [[BOUND14:%.*]] = icmp ult ptr [[B]], [[SCEVGEP]]
; CHECK-NEXT:    [[FOUND_CONFLICT5:%.*]] = and i1 [[BOUND03]], [[BOUND14]]
; CHECK-NEXT:    [[CONFLICT_RDX:%.*]] = or i1 [[FOUND_CONFLICT]], [[FOUND_CONFLICT5]]
; CHECK-NEXT:    br i1 [[CONFLICT_RDX]], label [[ENTRY:%.*]], label [[FOR_BODY_PH_LDIST1:%.*]]
; CHECK:       for.body.ph.lver.orig:
; CHECK-NEXT:    br label [[FOR_BODY_LVER_ORIG:%.*]]
; CHECK:       for.body.lver.orig:
; CHECK-NEXT:    [[IV:%.*]] = phi i16 [ 0, [[ENTRY]] ], [ [[IV_NEXT:%.*]], [[IF_END:%.*]] ]
; CHECK-NEXT:    [[LV:%.*]] = load i16, ptr [[A]], align 1
; CHECK-NEXT:    store i16 [[LV]], ptr [[A]], align 1
; CHECK-NEXT:    br i1 [[COND:%.*]], label [[IF_THEN:%.*]], label [[IF_END]]
; CHECK:       if.then.lver.orig:
; CHECK-NEXT:    [[LV2:%.*]] = load i16, ptr [[A]], align 1
; CHECK-NEXT:    br label [[IF_END]]
; CHECK:       if.end.lver.orig:
; CHECK-NEXT:    [[C_SINK_LVER_ORIG:%.*]] = phi ptr [ [[B]], [[IF_THEN]] ], [ [[C]], [[FOR_BODY_LVER_ORIG]] ]
; CHECK-NEXT:    [[LV3_LVER_ORIG:%.*]] = load i16, ptr [[C_SINK_LVER_ORIG]], align 2
; CHECK-NEXT:    [[ADD_LVER_ORIG:%.*]] = add i16 [[LV3_LVER_ORIG]], 10
; CHECK-NEXT:    store i16 [[ADD_LVER_ORIG]], ptr [[C_SINK_LVER_ORIG]], align 1
; CHECK-NEXT:    [[IV_NEXT]] = add nuw nsw i16 [[IV]], 1
; CHECK-NEXT:    [[TOBOOL_NOT_LVER_ORIG:%.*]] = icmp eq i16 [[IV_NEXT]], 1000
; CHECK-NEXT:    br i1 [[TOBOOL_NOT_LVER_ORIG]], label [[FOR_END_LOOPEXIT_LOOPEXIT:%.*]], label [[FOR_BODY_LVER_ORIG]]
; CHECK:       for.body.ph.ldist1:
; CHECK-NEXT:    br label [[FOR_BODY_LDIST1:%.*]]
; CHECK:       for.body.ldist1:
; CHECK-NEXT:    [[IV_LDIST1:%.*]] = phi i16 [ 0, [[FOR_BODY_PH_LDIST1]] ], [ [[IV_NEXT_LDIST1:%.*]], [[IF_END_LDIST1:%.*]] ]
; CHECK-NEXT:    [[LV_LDIST1:%.*]] = load i16, ptr [[A]], align 1, !alias.scope [[META0:![0-9]+]], !noalias [[META3:![0-9]+]]
; CHECK-NEXT:    store i16 [[LV_LDIST1]], ptr [[A]], align 1, !alias.scope [[META0]], !noalias [[META3]]
; CHECK-NEXT:    br i1 [[COND]], label [[IF_THEN_LDIST1:%.*]], label [[IF_END_LDIST1]]
; CHECK:       if.then.ldist1:
; CHECK-NEXT:    [[LV2_LDIST1:%.*]] = load i16, ptr [[A]], align 1, !alias.scope [[META0]], !noalias [[META3]]
; CHECK-NEXT:    br label [[IF_END_LDIST1]]
; CHECK:       if.end.ldist1:
; CHECK-NEXT:    [[IV_NEXT_LDIST1]] = add nuw nsw i16 [[IV_LDIST1]], 1
; CHECK-NEXT:    [[TOBOOL_NOT_LDIST1:%.*]] = icmp eq i16 [[IV_NEXT_LDIST1]], 1000
; CHECK-NEXT:    br i1 [[TOBOOL_NOT_LDIST1]], label [[FOR_BODY_PH:%.*]], label [[FOR_BODY_LDIST1]]
; CHECK:       for.body.ph:
; CHECK-NEXT:    br label [[FOR_BODY1:%.*]]
; CHECK:       for.body:
; CHECK-NEXT:    [[IV1:%.*]] = phi i16 [ 0, [[FOR_BODY_PH]] ], [ [[IV_NEXT1:%.*]], [[IF_END1:%.*]] ]
; CHECK-NEXT:    br i1 [[COND]], label [[IF_THEN1:%.*]], label [[IF_END1]]
; CHECK:       if.then:
; CHECK-NEXT:    br label [[IF_END1]]
; CHECK:       if.end:
; CHECK-NEXT:    [[C_SINK:%.*]] = phi ptr [ [[B]], [[IF_THEN1]] ], [ [[C]], [[FOR_BODY1]] ]
; CHECK-NEXT:    [[LV3:%.*]] = load i16, ptr [[C_SINK]], align 2
; CHECK-NEXT:    [[ADD:%.*]] = add i16 [[LV3]], 10
; CHECK-NEXT:    store i16 [[ADD]], ptr [[C_SINK]], align 1
; CHECK-NEXT:    [[IV_NEXT1]] = add nuw nsw i16 [[IV1]], 1
; CHECK-NEXT:    [[TOBOOL_NOT:%.*]] = icmp eq i16 [[IV_NEXT1]], 1000
; CHECK-NEXT:    br i1 [[TOBOOL_NOT]], label [[FOR_END_LOOPEXIT_LOOPEXIT6:%.*]], label [[FOR_BODY1]]
; CHECK:       for.end.loopexit.loopexit:
; CHECK-NEXT:    br label [[FOR_END_LOOPEXIT:%.*]]
; CHECK:       for.end.loopexit.loopexit6:
; CHECK-NEXT:    br label [[FOR_END_LOOPEXIT]]
; CHECK:       for.end.loopexit:
; CHECK-NEXT:    ret void
;
entry:
  br label %for.body

for.body:                                         ; preds = %if.end, %entry
  %iv = phi i16 [ 0, %entry ], [ %iv.next, %if.end ]
  %lv = load i16, ptr %A, align 1
  store i16 %lv, ptr %A, align 1
  br i1 %cond, label %if.then, label %if.end

if.then:                                          ; preds = %for.body
  %lv2 = load i16, ptr %A, align 1
  br label %if.end

if.end:                                           ; preds = %if.then, %for.body
  %c.sink = phi ptr [ %B, %if.then ], [ %C, %for.body ]
  %lv3 = load i16, ptr %c.sink
  %add = add i16 %lv3, 10
  store i16 %add, ptr %c.sink, align 1
  %iv.next = add nuw nsw i16 %iv, 1
  %tobool.not = icmp eq i16 %iv.next, 1000
  br i1 %tobool.not, label %for.end.loopexit, label %for.body

for.end.loopexit:                                 ; preds = %if.end
  ret void
}

define void @phi_load_distribute(i1 %cond, ptr %A, ptr %B, ptr %C) {
; CHECK-LABEL: @phi_load_distribute(
; CHECK-NEXT:  entry:
; CHECK-NEXT:    br label [[FOR_BODY_LVER_ORIG:%.*]]
; CHECK:       for.body:
; CHECK-NEXT:    [[IV_LVER_ORIG:%.*]] = phi i16 [ 0, [[FOR_BODY_PH_LVER_ORIG:%.*]] ], [ [[IV_NEXT_LVER_ORIG:%.*]], [[IF_END_LVER_ORIG:%.*]] ]
; CHECK-NEXT:    [[LV_LVER_ORIG:%.*]] = load i16, ptr [[A:%.*]], align 1
; CHECK-NEXT:    store i16 [[LV_LVER_ORIG]], ptr [[A]], align 1
; CHECK-NEXT:    br i1 [[COND:%.*]], label [[IF_THEN_LVER_ORIG:%.*]], label [[IF_END_LVER_ORIG]]
; CHECK:       if.then:
; CHECK-NEXT:    [[LV2:%.*]] = load i16, ptr [[A]], align 1
; CHECK-NEXT:    br label [[IF_END_LVER_ORIG]]
; CHECK:       if.end:
; CHECK-NEXT:    [[C_SINK:%.*]] = phi ptr [ [[B:%.*]], [[IF_THEN_LVER_ORIG]] ], [ [[C:%.*]], [[FOR_BODY_LVER_ORIG]] ]
; CHECK-NEXT:    [[LV3:%.*]] = load i16, ptr [[C_SINK]], align 2
; CHECK-NEXT:    [[IV_NEXT_LVER_ORIG]] = add nuw nsw i16 [[IV_LVER_ORIG]], 1
; CHECK-NEXT:    [[TOBOOL_NOT:%.*]] = icmp eq i16 [[IV_NEXT_LVER_ORIG]], 1000
; CHECK-NEXT:    br i1 [[TOBOOL_NOT]], label [[FOR_END_LOOPEXIT:%.*]], label [[FOR_BODY_LVER_ORIG]]
; CHECK:       for.end.loopexit:
; CHECK-NEXT:    ret void
;
entry:
  br label %for.body

for.body:                                         ; preds = %if.end, %entry
  %iv = phi i16 [ 0, %entry ], [ %iv.next, %if.end ]
  %lv = load i16, ptr %A, align 1
  store i16 %lv, ptr %A, align 1
  br i1 %cond, label %if.then, label %if.end

if.then:                                          ; preds = %for.body
  %lv2 = load i16, ptr %A, align 1
  br label %if.end

if.end:                                           ; preds = %if.then, %for.body
  %c.sink = phi ptr [ %B, %if.then ], [ %C, %for.body ]
  %lv3 = load i16, ptr %c.sink
  %iv.next = add nuw nsw i16 %iv, 1
  %tobool.not = icmp eq i16 %iv.next, 1000
  br i1 %tobool.not, label %for.end.loopexit, label %for.body

for.end.loopexit:                                 ; preds = %if.end
  ret void
}