llvm/test/Transforms/SLPVectorizer/X86/pr98978.ll

; NOTE: Assertions have been autogenerated by utils/update_test_checks.py UTC_ARGS: --version 5
; RUN: opt -S -passes=slp-vectorizer < %s | FileCheck %s

target triple = "x86_64-redhat-linux-gnu"

; The load+store sequence inside bb10 should not get vectorized. Previously,
; we incorrectly determined that the pointers do not alias, because a cache
; entry based indirectly on a disproven NoAlias assumption was not cleared
; from the BatchAA cache.
define void @test(ptr %p1, i64 %arg1, i64 %arg2) {
; CHECK-LABEL: define void @test(
; CHECK-SAME: ptr [[P1:%.*]], i64 [[ARG1:%.*]], i64 [[ARG2:%.*]]) {
; CHECK-NEXT:  [[_PREHEADER48_PREHEADER_1:.*]]:
; CHECK-NEXT:    br label %[[_LOOPEXIT49_1:.*]]
; CHECK:       [[_LOOPEXIT49_1]]:
; CHECK-NEXT:    [[I:%.*]] = phi ptr [ [[I21:%.*]], %[[BB20:.*]] ], [ [[P1]], %[[_PREHEADER48_PREHEADER_1]] ]
; CHECK-NEXT:    br i1 false, label %[[BB22:.*]], label %[[DOTPREHEADER48_PREHEADER_1:.*]]
; CHECK:       [[DEAD:.*]]:
; CHECK-NEXT:    br label %[[DOTPREHEADER48_PREHEADER_1]]
; CHECK:       [[_PREHEADER48_PREHEADER_2:.*:]]
; CHECK-NEXT:    [[I5:%.*]] = phi ptr [ [[I]], %[[DEAD]] ], [ [[I]], %[[_LOOPEXIT49_1]] ]
; CHECK-NEXT:    br label %[[DOTLOOPEXIT49_1:.*]]
; CHECK:       [[DEAD1:.*]]:
; CHECK-NEXT:    br i1 false, label %[[DOTLOOPEXIT49_1]], label %[[BB20]]
; CHECK:       [[_LOOPEXIT49_2:.*:]]
; CHECK-NEXT:    [[I6:%.*]] = phi ptr [ [[I5]], %[[DEAD1]] ], [ [[I5]], %[[DOTPREHEADER48_PREHEADER_1]] ]
; CHECK-NEXT:    [[I7:%.*]] = getelementptr i8, ptr [[I6]], i64 [[ARG1]]
; CHECK-NEXT:    br label %[[BB10:.*]]
; CHECK:       [[DEAD2:.*]]:
; CHECK-NEXT:    br label %[[BB10]]
; CHECK:       [[BB10]]:
; CHECK-NEXT:    [[I11:%.*]] = phi ptr [ [[I7]], %[[DOTLOOPEXIT49_1]] ], [ null, %[[DEAD2]] ]
; CHECK-NEXT:    [[I16:%.*]] = getelementptr i8, ptr [[I11]], i64 8
; CHECK-NEXT:    [[I17:%.*]] = load i64, ptr [[I16]], align 1
; CHECK-NEXT:    store i64 [[I17]], ptr [[I6]], align 1
; CHECK-NEXT:    [[I18:%.*]] = getelementptr i8, ptr [[I6]], i64 8
; CHECK-NEXT:    [[I19:%.*]] = load i64, ptr [[I11]], align 1
; CHECK-NEXT:    store i64 [[I19]], ptr [[I18]], align 1
; CHECK-NEXT:    br label %[[BB20]]
; CHECK:       [[BB20]]:
; CHECK-NEXT:    [[I21]] = phi ptr [ [[I5]], %[[DEAD1]] ], [ [[I6]], %[[BB10]] ]
; CHECK-NEXT:    br label %[[_LOOPEXIT49_1]]
; CHECK:       [[BB22]]:
; CHECK-NEXT:    [[I23:%.*]] = getelementptr i8, ptr [[I]], i64 [[ARG2]]
; CHECK-NEXT:    [[I25:%.*]] = getelementptr i8, ptr [[I23]], i64 8
; CHECK-NEXT:    br label %[[BB26:.*]]
; CHECK:       [[BB26]]:
; CHECK-NEXT:    [[I27:%.*]] = phi ptr [ null, %[[BB26]] ], [ [[I25]], %[[BB22]] ]
; CHECK-NEXT:    store i64 0, ptr [[I27]], align 1
; CHECK-NEXT:    [[I28:%.*]] = getelementptr i8, ptr [[I27]], i64 8
; CHECK-NEXT:    [[I29:%.*]] = load i64, ptr [[I23]], align 1
; CHECK-NEXT:    store i64 0, ptr [[I28]], align 1
; CHECK-NEXT:    br label %[[BB26]]
;
entry:
  br label %loop1

loop1:                                            ; preds = %bb20, %entry
  %i = phi ptr [ %i21, %bb20 ], [ %p1, %entry ]
  br i1 false, label %bb22, label %.preheader48.preheader.1

dead:                                             ; No predecessors!
  br label %.preheader48.preheader.1

.preheader48.preheader.1:                         ; preds = %dead, %loop1
  %i5 = phi ptr [ %i, %dead ], [ %i, %loop1 ]
  br label %.loopexit49.1

dead1:                                    ; No predecessors!
  br i1 false, label %.loopexit49.1, label %bb20

.loopexit49.1:                                    ; preds = %dead1, %.preheader48.preheader.1
  %i6 = phi ptr [ %i5, %dead1 ], [ %i5, %.preheader48.preheader.1 ]
  %i7 = getelementptr i8, ptr %i6, i64 %arg1
  br label %bb10

dead2:                                            ; No predecessors!
  br label %bb10

bb10:                                             ; preds = %dead2, %.loopexit49.1
  %i11 = phi ptr [ %i7, %.loopexit49.1 ], [ null, %dead2 ]
  %i16 = getelementptr i8, ptr %i11, i64 8
  %i17 = load i64, ptr %i16, align 1
  store i64 %i17, ptr %i6, align 1
  %i18 = getelementptr i8, ptr %i6, i64 8
  %i19 = load i64, ptr %i11, align 1
  store i64 %i19, ptr %i18, align 1
  br label %bb20

bb20:                                             ; preds = %bb10, %dead1
  %i21 = phi ptr [ %i5, %dead1 ], [ %i6, %bb10 ]
  br label %loop1

bb22:                                             ; preds = %loop1
  %i23 = getelementptr i8, ptr %i, i64 %arg2
  %i25 = getelementptr i8, ptr %i23, i64 8
  br label %bb26

bb26:                                             ; preds = %bb26, %bb22
  %i27 = phi ptr [ null, %bb26 ], [ %i25, %bb22 ]
  store i64 0, ptr %i27, align 1
  %i28 = getelementptr i8, ptr %i27, i64 8
  %i29 = load i64, ptr %i23, align 1
  store i64 0, ptr %i28, align 1
  br label %bb26
}