xref: /llvm-project-15.0.7/llvm/test/Transforms/LoopVectorize/pointer-select-runtime-checks.ll (revision e9cced27)

; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
; RUN: opt -passes=loop-vectorize -force-vector-width=1 -force-vector-interleave=2 -S %s | FileCheck %s

define void @test1_select_invariant(ptr %src.1, ptr %src.2, ptr %dst, i1 %c, i8 %n) {
; CHECK-LABEL: @test1_select_invariant(
; CHECK-NEXT:  entry:
; CHECK-NEXT:    [[PTR_SEL:%.*]] = select i1 [[C:%.*]], ptr [[SRC_1:%.*]], ptr [[SRC_2:%.*]]
; CHECK-NEXT:    [[TMP0:%.*]] = add i8 [[N:%.*]], -1
; CHECK-NEXT:    [[TMP1:%.*]] = zext i8 [[TMP0]] to i32
; CHECK-NEXT:    [[TMP2:%.*]] = add nuw nsw i32 [[TMP1]], 1
; CHECK-NEXT:    [[MIN_ITERS_CHECK:%.*]] = icmp ult i32 [[TMP2]], 2
; CHECK-NEXT:    br i1 [[MIN_ITERS_CHECK]], label [[SCALAR_PH:%.*]], label [[VECTOR_MEMCHECK:%.*]]
; CHECK:       vector.memcheck:
; CHECK-NEXT:    [[TMP3:%.*]] = add i8 [[N]], -1
; CHECK-NEXT:    [[TMP4:%.*]] = zext i8 [[TMP3]] to i64
; CHECK-NEXT:    [[TMP5:%.*]] = add nuw nsw i64 [[TMP4]], 1
; CHECK-NEXT:    [[UGLYGEP:%.*]] = getelementptr i8, ptr [[DST:%.*]], i64 [[TMP5]]
; CHECK-NEXT:    [[UGLYGEP1:%.*]] = getelementptr i8, ptr [[PTR_SEL]], i64 1
; CHECK-NEXT:    [[BOUND0:%.*]] = icmp ult ptr [[DST]], [[UGLYGEP1]]
; CHECK-NEXT:    [[BOUND1:%.*]] = icmp ult ptr [[PTR_SEL]], [[UGLYGEP]]
; CHECK-NEXT:    [[FOUND_CONFLICT:%.*]] = and i1 [[BOUND0]], [[BOUND1]]
; CHECK-NEXT:    br i1 [[FOUND_CONFLICT]], label [[SCALAR_PH]], label [[VECTOR_PH:%.*]]
; CHECK:       vector.ph:
; CHECK-NEXT:    [[N_MOD_VF:%.*]] = urem i32 [[TMP2]], 2
; CHECK-NEXT:    [[N_VEC:%.*]] = sub i32 [[TMP2]], [[N_MOD_VF]]
; CHECK-NEXT:    [[IND_END:%.*]] = trunc i32 [[N_VEC]] to i8
; CHECK-NEXT:    br label [[VECTOR_BODY:%.*]]
; CHECK:       vector.body:
; CHECK-NEXT:    [[INDEX:%.*]] = phi i32 [ 0, [[VECTOR_PH]] ], [ [[INDEX_NEXT:%.*]], [[VECTOR_BODY]] ]
; CHECK-NEXT:    [[OFFSET_IDX:%.*]] = trunc i32 [[INDEX]] to i8
; CHECK-NEXT:    [[INDUCTION:%.*]] = add i8 [[OFFSET_IDX]], 0
; CHECK-NEXT:    [[INDUCTION2:%.*]] = add i8 [[OFFSET_IDX]], 1
; CHECK-NEXT:    [[TMP6:%.*]] = load i8, ptr [[PTR_SEL]], align 8, !alias.scope !0
; CHECK-NEXT:    [[TMP7:%.*]] = load i8, ptr [[PTR_SEL]], align 8, !alias.scope !0
; CHECK-NEXT:    [[TMP8:%.*]] = getelementptr i8, ptr [[DST]], i8 [[INDUCTION]]
; CHECK-NEXT:    [[TMP9:%.*]] = getelementptr i8, ptr [[DST]], i8 [[INDUCTION2]]
; CHECK-NEXT:    store i8 [[TMP6]], ptr [[TMP8]], align 2, !alias.scope !3, !noalias !0
; CHECK-NEXT:    store i8 [[TMP7]], ptr [[TMP9]], align 2, !alias.scope !3, !noalias !0
; CHECK-NEXT:    [[INDEX_NEXT]] = add nuw i32 [[INDEX]], 2
; CHECK-NEXT:    [[TMP10:%.*]] = icmp eq i32 [[INDEX_NEXT]], [[N_VEC]]
; CHECK-NEXT:    br i1 [[TMP10]], label [[MIDDLE_BLOCK:%.*]], label [[VECTOR_BODY]], !llvm.loop [[LOOP5:![0-9]+]]
; CHECK:       middle.block:
; CHECK-NEXT:    [[CMP_N:%.*]] = icmp eq i32 [[TMP2]], [[N_VEC]]
; CHECK-NEXT:    br i1 [[CMP_N]], label [[EXIT:%.*]], label [[SCALAR_PH]]
; CHECK:       scalar.ph:
; CHECK-NEXT:    [[BC_RESUME_VAL:%.*]] = phi i8 [ [[IND_END]], [[MIDDLE_BLOCK]] ], [ 0, [[ENTRY:%.*]] ], [ 0, [[VECTOR_MEMCHECK]] ]
; CHECK-NEXT:    br label [[LOOP:%.*]]
; CHECK:       loop:
; CHECK-NEXT:    [[IV:%.*]] = phi i8 [ [[BC_RESUME_VAL]], [[SCALAR_PH]] ], [ [[IV_NEXT:%.*]], [[LOOP]] ]
; CHECK-NEXT:    [[L_1:%.*]] = load i8, ptr [[PTR_SEL]], align 8
; CHECK-NEXT:    [[GEP_DST:%.*]] = getelementptr i8, ptr [[DST]], i8 [[IV]]
; CHECK-NEXT:    store i8 [[L_1]], ptr [[GEP_DST]], align 2
; CHECK-NEXT:    [[IV_NEXT]] = add nuw nsw i8 [[IV]], 1
; CHECK-NEXT:    [[EC:%.*]] = icmp eq i8 [[IV_NEXT]], [[N]]
; CHECK-NEXT:    br i1 [[EC]], label [[EXIT]], label [[LOOP]], !llvm.loop [[LOOP7:![0-9]+]]
; CHECK:       exit:
; CHECK-NEXT:    ret void
;
entry:
  %ptr.sel = select i1 %c, ptr %src.1, ptr %src.2
  br label %loop

loop:
  %iv = phi i8 [ 0, %entry ], [ %iv.next, %loop ]
  %l.1 = load i8, ptr %ptr.sel, align 8
  %gep.dst = getelementptr i8, ptr %dst, i8 %iv
  store i8 %l.1, ptr %gep.dst, align 2
  %iv.next = add nsw nuw i8 %iv, 1
  %ec = icmp eq i8 %iv.next, %n
  br i1 %ec, label %exit, label %loop

exit:
  ret void
}

define void @test_loop_dependent_select1(ptr %src.1, ptr %src.2, ptr %dst, i1 %c, i8 %n) {
; CHECK-LABEL: @test_loop_dependent_select1(
; CHECK-NEXT:  entry:
; CHECK-NEXT:    [[SRC_23:%.*]] = ptrtoint ptr [[SRC_2:%.*]] to i64
; CHECK-NEXT:    [[SRC_12:%.*]] = ptrtoint ptr [[SRC_1:%.*]] to i64
; CHECK-NEXT:    [[DST1:%.*]] = ptrtoint ptr [[DST:%.*]] to i64
; CHECK-NEXT:    [[TMP0:%.*]] = add i8 [[N:%.*]], -1
; CHECK-NEXT:    [[TMP1:%.*]] = zext i8 [[TMP0]] to i32
; CHECK-NEXT:    [[TMP2:%.*]] = add nuw nsw i32 [[TMP1]], 1
; CHECK-NEXT:    [[MIN_ITERS_CHECK:%.*]] = icmp ult i32 [[TMP2]], 2
; CHECK-NEXT:    br i1 [[MIN_ITERS_CHECK]], label [[SCALAR_PH:%.*]], label [[VECTOR_MEMCHECK:%.*]]
; CHECK:       vector.memcheck:
; CHECK-NEXT:    [[DST1_FR:%.*]] = freeze i64 [[DST1]]
; CHECK-NEXT:    [[SRC_12_FR:%.*]] = freeze i64 [[SRC_12]]
; CHECK-NEXT:    [[TMP3:%.*]] = sub i64 [[DST1_FR]], [[SRC_12_FR]]
; CHECK-NEXT:    [[DIFF_CHECK:%.*]] = icmp ult i64 [[TMP3]], 2
; CHECK-NEXT:    [[DST1_FR4:%.*]] = freeze i64 [[DST1]]
; CHECK-NEXT:    [[SRC_23_FR:%.*]] = freeze i64 [[SRC_23]]
; CHECK-NEXT:    [[TMP4:%.*]] = sub i64 [[DST1_FR4]], [[SRC_23_FR]]
; CHECK-NEXT:    [[DIFF_CHECK5:%.*]] = icmp ult i64 [[TMP4]], 2
; CHECK-NEXT:    [[CONFLICT_RDX:%.*]] = or i1 [[DIFF_CHECK]], [[DIFF_CHECK5]]
; CHECK-NEXT:    br i1 [[CONFLICT_RDX]], label [[SCALAR_PH]], label [[VECTOR_PH:%.*]]
; CHECK:       vector.ph:
; CHECK-NEXT:    [[N_MOD_VF:%.*]] = urem i32 [[TMP2]], 2
; CHECK-NEXT:    [[N_VEC:%.*]] = sub i32 [[TMP2]], [[N_MOD_VF]]
; CHECK-NEXT:    [[IND_END:%.*]] = trunc i32 [[N_VEC]] to i8
; CHECK-NEXT:    br label [[VECTOR_BODY:%.*]]
; CHECK:       vector.body:
; CHECK-NEXT:    [[INDEX:%.*]] = phi i32 [ 0, [[VECTOR_PH]] ], [ [[INDEX_NEXT:%.*]], [[VECTOR_BODY]] ]
; CHECK-NEXT:    [[OFFSET_IDX:%.*]] = trunc i32 [[INDEX]] to i8
; CHECK-NEXT:    [[INDUCTION:%.*]] = add i8 [[OFFSET_IDX]], 0
; CHECK-NEXT:    [[INDUCTION6:%.*]] = add i8 [[OFFSET_IDX]], 1
; CHECK-NEXT:    [[TMP5:%.*]] = getelementptr i8, ptr [[SRC_1]], i8 [[INDUCTION]]
; CHECK-NEXT:    [[TMP6:%.*]] = getelementptr i8, ptr [[SRC_1]], i8 [[INDUCTION6]]
; CHECK-NEXT:    [[TMP7:%.*]] = getelementptr i8, ptr [[SRC_2]], i8 [[INDUCTION]]
; CHECK-NEXT:    [[TMP8:%.*]] = getelementptr i8, ptr [[SRC_2]], i8 [[INDUCTION6]]
; CHECK-NEXT:    [[TMP9:%.*]] = select i1 [[C:%.*]], ptr [[TMP5]], ptr [[TMP7]]
; CHECK-NEXT:    [[TMP10:%.*]] = select i1 [[C]], ptr [[TMP6]], ptr [[TMP8]]
; CHECK-NEXT:    [[TMP11:%.*]] = load i8, ptr [[TMP9]], align 8
; CHECK-NEXT:    [[TMP12:%.*]] = load i8, ptr [[TMP10]], align 8
; CHECK-NEXT:    [[TMP13:%.*]] = getelementptr i8, ptr [[DST]], i8 [[INDUCTION]]
; CHECK-NEXT:    [[TMP14:%.*]] = getelementptr i8, ptr [[DST]], i8 [[INDUCTION6]]
; CHECK-NEXT:    store i8 [[TMP11]], ptr [[TMP13]], align 2
; CHECK-NEXT:    store i8 [[TMP12]], ptr [[TMP14]], align 2
; CHECK-NEXT:    [[INDEX_NEXT]] = add nuw i32 [[INDEX]], 2
; CHECK-NEXT:    [[TMP15:%.*]] = icmp eq i32 [[INDEX_NEXT]], [[N_VEC]]
; CHECK-NEXT:    br i1 [[TMP15]], label [[MIDDLE_BLOCK:%.*]], label [[VECTOR_BODY]], !llvm.loop [[LOOP8:![0-9]+]]
; CHECK:       middle.block:
; CHECK-NEXT:    [[CMP_N:%.*]] = icmp eq i32 [[TMP2]], [[N_VEC]]
; CHECK-NEXT:    br i1 [[CMP_N]], label [[EXIT:%.*]], label [[SCALAR_PH]]
; CHECK:       scalar.ph:
; CHECK-NEXT:    [[BC_RESUME_VAL:%.*]] = phi i8 [ [[IND_END]], [[MIDDLE_BLOCK]] ], [ 0, [[ENTRY:%.*]] ], [ 0, [[VECTOR_MEMCHECK]] ]
; CHECK-NEXT:    br label [[LOOP:%.*]]
; CHECK:       loop:
; CHECK-NEXT:    [[IV:%.*]] = phi i8 [ [[BC_RESUME_VAL]], [[SCALAR_PH]] ], [ [[IV_NEXT:%.*]], [[LOOP]] ]
; CHECK-NEXT:    [[GEP_SRC_1:%.*]] = getelementptr i8, ptr [[SRC_1]], i8 [[IV]]
; CHECK-NEXT:    [[GEP_SRC_2:%.*]] = getelementptr i8, ptr [[SRC_2]], i8 [[IV]]
; CHECK-NEXT:    [[PTR_SEL:%.*]] = select i1 [[C]], ptr [[GEP_SRC_1]], ptr [[GEP_SRC_2]]
; CHECK-NEXT:    [[L_1:%.*]] = load i8, ptr [[PTR_SEL]], align 8
; CHECK-NEXT:    [[GEP_DST:%.*]] = getelementptr i8, ptr [[DST]], i8 [[IV]]
; CHECK-NEXT:    store i8 [[L_1]], ptr [[GEP_DST]], align 2
; CHECK-NEXT:    [[IV_NEXT]] = add nuw nsw i8 [[IV]], 1
; CHECK-NEXT:    [[EC:%.*]] = icmp eq i8 [[IV_NEXT]], [[N]]
; CHECK-NEXT:    br i1 [[EC]], label [[EXIT]], label [[LOOP]], !llvm.loop [[LOOP9:![0-9]+]]
; CHECK:       exit:
; CHECK-NEXT:    ret void
;
entry:
  br label %loop

loop:
  %iv = phi i8 [ 0, %entry ], [ %iv.next, %loop ]
  %gep.src.1 = getelementptr i8, ptr %src.1, i8 %iv
  %gep.src.2 = getelementptr i8, ptr %src.2, i8 %iv
  %ptr.sel = select i1 %c, ptr %gep.src.1, ptr %gep.src.2
  %l.1 = load i8, ptr %ptr.sel, align 8
  %gep.dst = getelementptr i8, ptr %dst, i8 %iv
  store i8 %l.1, ptr %gep.dst, align 2
  %iv.next = add nsw nuw i8 %iv, 1
  %ec = icmp eq i8 %iv.next, %n
  br i1 %ec, label %exit, label %loop

exit:
  ret void
}


define void @test_loop_dependent_select2(ptr %src.1, ptr %src.2, ptr %dst, i8 %n, i8 %x) {
; CHECK-LABEL: @test_loop_dependent_select2(
; CHECK-NEXT:  entry:
; CHECK-NEXT:    [[TMP0:%.*]] = add i8 [[N:%.*]], -1
; CHECK-NEXT:    [[TMP1:%.*]] = zext i8 [[TMP0]] to i32
; CHECK-NEXT:    [[TMP2:%.*]] = add nuw nsw i32 [[TMP1]], 1
; CHECK-NEXT:    [[MIN_ITERS_CHECK:%.*]] = icmp ult i32 [[TMP2]], 2
; CHECK-NEXT:    br i1 [[MIN_ITERS_CHECK]], label [[SCALAR_PH:%.*]], label [[VECTOR_MEMCHECK:%.*]]
; CHECK:       vector.memcheck:
; CHECK-NEXT:    [[TMP3:%.*]] = add i8 [[N]], -1
; CHECK-NEXT:    [[TMP4:%.*]] = zext i8 [[TMP3]] to i64
; CHECK-NEXT:    [[TMP5:%.*]] = add nuw nsw i64 [[TMP4]], 1
; CHECK-NEXT:    [[UGLYGEP:%.*]] = getelementptr i8, ptr [[DST:%.*]], i64 [[TMP5]]
; CHECK-NEXT:    [[UGLYGEP1:%.*]] = getelementptr i8, ptr [[SRC_1:%.*]], i64 1
; CHECK-NEXT:    [[SRC_1_FR:%.*]] = freeze ptr [[SRC_1]]
; CHECK-NEXT:    [[UGLYGEP1_FR:%.*]] = freeze ptr [[UGLYGEP1]]
; CHECK-NEXT:    [[UGLYGEP2:%.*]] = getelementptr i8, ptr [[SRC_2:%.*]], i64 1
; CHECK-NEXT:    [[SRC_2_FR:%.*]] = freeze ptr [[SRC_2]]
; CHECK-NEXT:    [[UGLYGEP2_FR:%.*]] = freeze ptr [[UGLYGEP2]]
; CHECK-NEXT:    [[BOUND0:%.*]] = icmp ult ptr [[DST]], [[UGLYGEP1_FR]]
; CHECK-NEXT:    [[BOUND1:%.*]] = icmp ult ptr [[SRC_1_FR]], [[UGLYGEP]]
; CHECK-NEXT:    [[FOUND_CONFLICT:%.*]] = and i1 [[BOUND0]], [[BOUND1]]
; CHECK-NEXT:    [[BOUND03:%.*]] = icmp ult ptr [[DST]], [[UGLYGEP2_FR]]
; CHECK-NEXT:    [[BOUND14:%.*]] = icmp ult ptr [[SRC_2_FR]], [[UGLYGEP]]
; 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 [[SCALAR_PH]], label [[VECTOR_PH:%.*]]
; CHECK:       vector.ph:
; CHECK-NEXT:    [[N_MOD_VF:%.*]] = urem i32 [[TMP2]], 2
; CHECK-NEXT:    [[N_VEC:%.*]] = sub i32 [[TMP2]], [[N_MOD_VF]]
; CHECK-NEXT:    [[IND_END:%.*]] = trunc i32 [[N_VEC]] to i8
; CHECK-NEXT:    br label [[VECTOR_BODY:%.*]]
; CHECK:       vector.body:
; CHECK-NEXT:    [[INDEX:%.*]] = phi i32 [ 0, [[VECTOR_PH]] ], [ [[INDEX_NEXT:%.*]], [[VECTOR_BODY]] ]
; CHECK-NEXT:    [[OFFSET_IDX:%.*]] = trunc i32 [[INDEX]] to i8
; CHECK-NEXT:    [[INDUCTION:%.*]] = add i8 [[OFFSET_IDX]], 0
; CHECK-NEXT:    [[INDUCTION6:%.*]] = add i8 [[OFFSET_IDX]], 1
; CHECK-NEXT:    [[TMP6:%.*]] = icmp ult i8 [[INDUCTION]], [[X:%.*]]
; CHECK-NEXT:    [[TMP7:%.*]] = icmp ult i8 [[INDUCTION6]], [[X]]
; CHECK-NEXT:    [[TMP8:%.*]] = select i1 [[TMP6]], ptr [[SRC_1]], ptr [[SRC_2]]
; CHECK-NEXT:    [[TMP9:%.*]] = select i1 [[TMP7]], ptr [[SRC_1]], ptr [[SRC_2]]
; CHECK-NEXT:    [[TMP10:%.*]] = load i8, ptr [[TMP8]], align 8, !alias.scope !10
; CHECK-NEXT:    [[TMP11:%.*]] = load i8, ptr [[TMP9]], align 8, !alias.scope !10
; CHECK-NEXT:    [[TMP12:%.*]] = getelementptr i8, ptr [[DST]], i8 [[INDUCTION]]
; CHECK-NEXT:    [[TMP13:%.*]] = getelementptr i8, ptr [[DST]], i8 [[INDUCTION6]]
; CHECK-NEXT:    store i8 [[TMP10]], ptr [[TMP12]], align 2, !alias.scope !13, !noalias !15
; CHECK-NEXT:    store i8 [[TMP11]], ptr [[TMP13]], align 2, !alias.scope !13, !noalias !15
; CHECK-NEXT:    [[INDEX_NEXT]] = add nuw i32 [[INDEX]], 2
; CHECK-NEXT:    [[TMP14:%.*]] = icmp eq i32 [[INDEX_NEXT]], [[N_VEC]]
; CHECK-NEXT:    br i1 [[TMP14]], label [[MIDDLE_BLOCK:%.*]], label [[VECTOR_BODY]], !llvm.loop [[LOOP17:![0-9]+]]
; CHECK:       middle.block:
; CHECK-NEXT:    [[CMP_N:%.*]] = icmp eq i32 [[TMP2]], [[N_VEC]]
; CHECK-NEXT:    br i1 [[CMP_N]], label [[EXIT:%.*]], label [[SCALAR_PH]]
; CHECK:       scalar.ph:
; CHECK-NEXT:    [[BC_RESUME_VAL:%.*]] = phi i8 [ [[IND_END]], [[MIDDLE_BLOCK]] ], [ 0, [[ENTRY:%.*]] ], [ 0, [[VECTOR_MEMCHECK]] ]
; CHECK-NEXT:    br label [[LOOP:%.*]]
; CHECK:       loop:
; CHECK-NEXT:    [[IV:%.*]] = phi i8 [ [[BC_RESUME_VAL]], [[SCALAR_PH]] ], [ [[IV_NEXT:%.*]], [[LOOP]] ]
; CHECK-NEXT:    [[C:%.*]] = icmp ult i8 [[IV]], [[X]]
; CHECK-NEXT:    [[PTR_SEL:%.*]] = select i1 [[C]], ptr [[SRC_1]], ptr [[SRC_2]]
; CHECK-NEXT:    [[L_1:%.*]] = load i8, ptr [[PTR_SEL]], align 8
; CHECK-NEXT:    [[GEP_DST:%.*]] = getelementptr i8, ptr [[DST]], i8 [[IV]]
; CHECK-NEXT:    store i8 [[L_1]], ptr [[GEP_DST]], align 2
; CHECK-NEXT:    [[IV_NEXT]] = add nuw nsw i8 [[IV]], 1
; CHECK-NEXT:    [[EC:%.*]] = icmp eq i8 [[IV_NEXT]], [[N]]
; CHECK-NEXT:    br i1 [[EC]], label [[EXIT]], label [[LOOP]], !llvm.loop [[LOOP18:![0-9]+]]
; CHECK:       exit:
; CHECK-NEXT:    ret void
;
entry:
  br label %loop

loop:
  %iv = phi i8 [ 0, %entry ], [ %iv.next, %loop ]
  %c = icmp ult i8 %iv, %x
  %ptr.sel = select i1 %c, ptr %src.1, ptr %src.2
  %l.1 = load i8, ptr %ptr.sel, align 8
  %gep.dst = getelementptr i8, ptr %dst, i8 %iv
  store i8 %l.1, ptr %gep.dst, align 2
  %iv.next = add nsw nuw i8 %iv, 1
  %ec = icmp eq i8 %iv.next, %n
  br i1 %ec, label %exit, label %loop

exit:
  ret void
}

define void @test_loop_dependent_select_first_ptr_noundef(ptr noundef %src.1, ptr %src.2, ptr %dst, i8 %n, i8 %x) {
; CHECK-LABEL: @test_loop_dependent_select_first_ptr_noundef(
; CHECK-NEXT:  entry:
; CHECK-NEXT:    [[TMP0:%.*]] = add i8 [[N:%.*]], -1
; CHECK-NEXT:    [[TMP1:%.*]] = zext i8 [[TMP0]] to i32
; CHECK-NEXT:    [[TMP2:%.*]] = add nuw nsw i32 [[TMP1]], 1
; CHECK-NEXT:    [[MIN_ITERS_CHECK:%.*]] = icmp ult i32 [[TMP2]], 2
; CHECK-NEXT:    br i1 [[MIN_ITERS_CHECK]], label [[SCALAR_PH:%.*]], label [[VECTOR_MEMCHECK:%.*]]
; CHECK:       vector.memcheck:
; CHECK-NEXT:    [[TMP3:%.*]] = add i8 [[N]], -1
; CHECK-NEXT:    [[TMP4:%.*]] = zext i8 [[TMP3]] to i64
; CHECK-NEXT:    [[TMP5:%.*]] = add nuw nsw i64 [[TMP4]], 1
; CHECK-NEXT:    [[UGLYGEP:%.*]] = getelementptr i8, ptr [[DST:%.*]], i64 [[TMP5]]
; CHECK-NEXT:    [[UGLYGEP1:%.*]] = getelementptr i8, ptr [[SRC_1:%.*]], i64 1
; CHECK-NEXT:    [[UGLYGEP2:%.*]] = getelementptr i8, ptr [[SRC_2:%.*]], i64 1
; CHECK-NEXT:    [[SRC_2_FR:%.*]] = freeze ptr [[SRC_2]]
; CHECK-NEXT:    [[UGLYGEP2_FR:%.*]] = freeze ptr [[UGLYGEP2]]
; CHECK-NEXT:    [[BOUND0:%.*]] = icmp ult ptr [[DST]], [[UGLYGEP1]]
; CHECK-NEXT:    [[BOUND1:%.*]] = icmp ult ptr [[SRC_1]], [[UGLYGEP]]
; CHECK-NEXT:    [[FOUND_CONFLICT:%.*]] = and i1 [[BOUND0]], [[BOUND1]]
; CHECK-NEXT:    [[BOUND03:%.*]] = icmp ult ptr [[DST]], [[UGLYGEP2_FR]]
; CHECK-NEXT:    [[BOUND14:%.*]] = icmp ult ptr [[SRC_2_FR]], [[UGLYGEP]]
; 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 [[SCALAR_PH]], label [[VECTOR_PH:%.*]]
; CHECK:       vector.ph:
; CHECK-NEXT:    [[N_MOD_VF:%.*]] = urem i32 [[TMP2]], 2
; CHECK-NEXT:    [[N_VEC:%.*]] = sub i32 [[TMP2]], [[N_MOD_VF]]
; CHECK-NEXT:    [[IND_END:%.*]] = trunc i32 [[N_VEC]] to i8
; CHECK-NEXT:    br label [[VECTOR_BODY:%.*]]
; CHECK:       vector.body:
; CHECK-NEXT:    [[INDEX:%.*]] = phi i32 [ 0, [[VECTOR_PH]] ], [ [[INDEX_NEXT:%.*]], [[VECTOR_BODY]] ]
; CHECK-NEXT:    [[OFFSET_IDX:%.*]] = trunc i32 [[INDEX]] to i8
; CHECK-NEXT:    [[INDUCTION:%.*]] = add i8 [[OFFSET_IDX]], 0
; CHECK-NEXT:    [[INDUCTION6:%.*]] = add i8 [[OFFSET_IDX]], 1
; CHECK-NEXT:    [[TMP6:%.*]] = icmp ult i8 [[INDUCTION]], [[X:%.*]]
; CHECK-NEXT:    [[TMP7:%.*]] = icmp ult i8 [[INDUCTION6]], [[X]]
; CHECK-NEXT:    [[TMP8:%.*]] = select i1 [[TMP6]], ptr [[SRC_1]], ptr [[SRC_2]]
; CHECK-NEXT:    [[TMP9:%.*]] = select i1 [[TMP7]], ptr [[SRC_1]], ptr [[SRC_2]]
; CHECK-NEXT:    [[TMP10:%.*]] = load i8, ptr [[TMP8]], align 8, !alias.scope !19
; CHECK-NEXT:    [[TMP11:%.*]] = load i8, ptr [[TMP9]], align 8, !alias.scope !19
; CHECK-NEXT:    [[TMP12:%.*]] = getelementptr i8, ptr [[DST]], i8 [[INDUCTION]]
; CHECK-NEXT:    [[TMP13:%.*]] = getelementptr i8, ptr [[DST]], i8 [[INDUCTION6]]
; CHECK-NEXT:    store i8 [[TMP10]], ptr [[TMP12]], align 2, !alias.scope !22, !noalias !24
; CHECK-NEXT:    store i8 [[TMP11]], ptr [[TMP13]], align 2, !alias.scope !22, !noalias !24
; CHECK-NEXT:    [[INDEX_NEXT]] = add nuw i32 [[INDEX]], 2
; CHECK-NEXT:    [[TMP14:%.*]] = icmp eq i32 [[INDEX_NEXT]], [[N_VEC]]
; CHECK-NEXT:    br i1 [[TMP14]], label [[MIDDLE_BLOCK:%.*]], label [[VECTOR_BODY]], !llvm.loop [[LOOP26:![0-9]+]]
; CHECK:       middle.block:
; CHECK-NEXT:    [[CMP_N:%.*]] = icmp eq i32 [[TMP2]], [[N_VEC]]
; CHECK-NEXT:    br i1 [[CMP_N]], label [[EXIT:%.*]], label [[SCALAR_PH]]
; CHECK:       scalar.ph:
; CHECK-NEXT:    [[BC_RESUME_VAL:%.*]] = phi i8 [ [[IND_END]], [[MIDDLE_BLOCK]] ], [ 0, [[ENTRY:%.*]] ], [ 0, [[VECTOR_MEMCHECK]] ]
; CHECK-NEXT:    br label [[LOOP:%.*]]
; CHECK:       loop:
; CHECK-NEXT:    [[IV:%.*]] = phi i8 [ [[BC_RESUME_VAL]], [[SCALAR_PH]] ], [ [[IV_NEXT:%.*]], [[LOOP]] ]
; CHECK-NEXT:    [[C:%.*]] = icmp ult i8 [[IV]], [[X]]
; CHECK-NEXT:    [[PTR_SEL:%.*]] = select i1 [[C]], ptr [[SRC_1]], ptr [[SRC_2]]
; CHECK-NEXT:    [[L_1:%.*]] = load i8, ptr [[PTR_SEL]], align 8
; CHECK-NEXT:    [[GEP_DST:%.*]] = getelementptr i8, ptr [[DST]], i8 [[IV]]
; CHECK-NEXT:    store i8 [[L_1]], ptr [[GEP_DST]], align 2
; CHECK-NEXT:    [[IV_NEXT]] = add nuw nsw i8 [[IV]], 1
; CHECK-NEXT:    [[EC:%.*]] = icmp eq i8 [[IV_NEXT]], [[N]]
; CHECK-NEXT:    br i1 [[EC]], label [[EXIT]], label [[LOOP]], !llvm.loop [[LOOP27:![0-9]+]]
; CHECK:       exit:
; CHECK-NEXT:    ret void
;
entry:
  br label %loop

loop:
  %iv = phi i8 [ 0, %entry ], [ %iv.next, %loop ]
  %c = icmp ult i8 %iv, %x
  %ptr.sel = select i1 %c, ptr %src.1, ptr %src.2
  %l.1 = load i8, ptr %ptr.sel, align 8
  %gep.dst = getelementptr i8, ptr %dst, i8 %iv
  store i8 %l.1, ptr %gep.dst, align 2
  %iv.next = add nsw nuw i8 %iv, 1
  %ec = icmp eq i8 %iv.next, %n
  br i1 %ec, label %exit, label %loop

exit:
  ret void
}

define void @test_loop_dependent_select_second_ptr_noundef(ptr %src.1, ptr noundef %src.2, ptr %dst, i8 %n, i8 %x) {
; CHECK-LABEL: @test_loop_dependent_select_second_ptr_noundef(
; CHECK-NEXT:  entry:
; CHECK-NEXT:    [[TMP0:%.*]] = add i8 [[N:%.*]], -1
; CHECK-NEXT:    [[TMP1:%.*]] = zext i8 [[TMP0]] to i32
; CHECK-NEXT:    [[TMP2:%.*]] = add nuw nsw i32 [[TMP1]], 1
; CHECK-NEXT:    [[MIN_ITERS_CHECK:%.*]] = icmp ult i32 [[TMP2]], 2
; CHECK-NEXT:    br i1 [[MIN_ITERS_CHECK]], label [[SCALAR_PH:%.*]], label [[VECTOR_MEMCHECK:%.*]]
; CHECK:       vector.memcheck:
; CHECK-NEXT:    [[TMP3:%.*]] = add i8 [[N]], -1
; CHECK-NEXT:    [[TMP4:%.*]] = zext i8 [[TMP3]] to i64
; CHECK-NEXT:    [[TMP5:%.*]] = add nuw nsw i64 [[TMP4]], 1
; CHECK-NEXT:    [[UGLYGEP:%.*]] = getelementptr i8, ptr [[DST:%.*]], i64 [[TMP5]]
; CHECK-NEXT:    [[UGLYGEP1:%.*]] = getelementptr i8, ptr [[SRC_1:%.*]], i64 1
; CHECK-NEXT:    [[SRC_1_FR:%.*]] = freeze ptr [[SRC_1]]
; CHECK-NEXT:    [[UGLYGEP1_FR:%.*]] = freeze ptr [[UGLYGEP1]]
; CHECK-NEXT:    [[UGLYGEP2:%.*]] = getelementptr i8, ptr [[SRC_2:%.*]], i64 1
; CHECK-NEXT:    [[BOUND0:%.*]] = icmp ult ptr [[DST]], [[UGLYGEP1_FR]]
; CHECK-NEXT:    [[BOUND1:%.*]] = icmp ult ptr [[SRC_1_FR]], [[UGLYGEP]]
; CHECK-NEXT:    [[FOUND_CONFLICT:%.*]] = and i1 [[BOUND0]], [[BOUND1]]
; CHECK-NEXT:    [[BOUND03:%.*]] = icmp ult ptr [[DST]], [[UGLYGEP2]]
; CHECK-NEXT:    [[BOUND14:%.*]] = icmp ult ptr [[SRC_2]], [[UGLYGEP]]
; 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 [[SCALAR_PH]], label [[VECTOR_PH:%.*]]
; CHECK:       vector.ph:
; CHECK-NEXT:    [[N_MOD_VF:%.*]] = urem i32 [[TMP2]], 2
; CHECK-NEXT:    [[N_VEC:%.*]] = sub i32 [[TMP2]], [[N_MOD_VF]]
; CHECK-NEXT:    [[IND_END:%.*]] = trunc i32 [[N_VEC]] to i8
; CHECK-NEXT:    br label [[VECTOR_BODY:%.*]]
; CHECK:       vector.body:
; CHECK-NEXT:    [[INDEX:%.*]] = phi i32 [ 0, [[VECTOR_PH]] ], [ [[INDEX_NEXT:%.*]], [[VECTOR_BODY]] ]
; CHECK-NEXT:    [[OFFSET_IDX:%.*]] = trunc i32 [[INDEX]] to i8
; CHECK-NEXT:    [[INDUCTION:%.*]] = add i8 [[OFFSET_IDX]], 0
; CHECK-NEXT:    [[INDUCTION6:%.*]] = add i8 [[OFFSET_IDX]], 1
; CHECK-NEXT:    [[TMP6:%.*]] = icmp ult i8 [[INDUCTION]], [[X:%.*]]
; CHECK-NEXT:    [[TMP7:%.*]] = icmp ult i8 [[INDUCTION6]], [[X]]
; CHECK-NEXT:    [[TMP8:%.*]] = select i1 [[TMP6]], ptr [[SRC_1]], ptr [[SRC_2]]
; CHECK-NEXT:    [[TMP9:%.*]] = select i1 [[TMP7]], ptr [[SRC_1]], ptr [[SRC_2]]
; CHECK-NEXT:    [[TMP10:%.*]] = load i8, ptr [[TMP8]], align 8, !alias.scope !28
; CHECK-NEXT:    [[TMP11:%.*]] = load i8, ptr [[TMP9]], align 8, !alias.scope !28
; CHECK-NEXT:    [[TMP12:%.*]] = getelementptr i8, ptr [[DST]], i8 [[INDUCTION]]
; CHECK-NEXT:    [[TMP13:%.*]] = getelementptr i8, ptr [[DST]], i8 [[INDUCTION6]]
; CHECK-NEXT:    store i8 [[TMP10]], ptr [[TMP12]], align 2, !alias.scope !31, !noalias !33
; CHECK-NEXT:    store i8 [[TMP11]], ptr [[TMP13]], align 2, !alias.scope !31, !noalias !33
; CHECK-NEXT:    [[INDEX_NEXT]] = add nuw i32 [[INDEX]], 2
; CHECK-NEXT:    [[TMP14:%.*]] = icmp eq i32 [[INDEX_NEXT]], [[N_VEC]]
; CHECK-NEXT:    br i1 [[TMP14]], label [[MIDDLE_BLOCK:%.*]], label [[VECTOR_BODY]], !llvm.loop [[LOOP35:![0-9]+]]
; CHECK:       middle.block:
; CHECK-NEXT:    [[CMP_N:%.*]] = icmp eq i32 [[TMP2]], [[N_VEC]]
; CHECK-NEXT:    br i1 [[CMP_N]], label [[EXIT:%.*]], label [[SCALAR_PH]]
; CHECK:       scalar.ph:
; CHECK-NEXT:    [[BC_RESUME_VAL:%.*]] = phi i8 [ [[IND_END]], [[MIDDLE_BLOCK]] ], [ 0, [[ENTRY:%.*]] ], [ 0, [[VECTOR_MEMCHECK]] ]
; CHECK-NEXT:    br label [[LOOP:%.*]]
; CHECK:       loop:
; CHECK-NEXT:    [[IV:%.*]] = phi i8 [ [[BC_RESUME_VAL]], [[SCALAR_PH]] ], [ [[IV_NEXT:%.*]], [[LOOP]] ]
; CHECK-NEXT:    [[C:%.*]] = icmp ult i8 [[IV]], [[X]]
; CHECK-NEXT:    [[PTR_SEL:%.*]] = select i1 [[C]], ptr [[SRC_1]], ptr [[SRC_2]]
; CHECK-NEXT:    [[L_1:%.*]] = load i8, ptr [[PTR_SEL]], align 8
; CHECK-NEXT:    [[GEP_DST:%.*]] = getelementptr i8, ptr [[DST]], i8 [[IV]]
; CHECK-NEXT:    store i8 [[L_1]], ptr [[GEP_DST]], align 2
; CHECK-NEXT:    [[IV_NEXT]] = add nuw nsw i8 [[IV]], 1
; CHECK-NEXT:    [[EC:%.*]] = icmp eq i8 [[IV_NEXT]], [[N]]
; CHECK-NEXT:    br i1 [[EC]], label [[EXIT]], label [[LOOP]], !llvm.loop [[LOOP36:![0-9]+]]
; CHECK:       exit:
; CHECK-NEXT:    ret void
;
entry:
  br label %loop

loop:
  %iv = phi i8 [ 0, %entry ], [ %iv.next, %loop ]
  %c = icmp ult i8 %iv, %x
  %ptr.sel = select i1 %c, ptr %src.1, ptr %src.2
  %l.1 = load i8, ptr %ptr.sel, align 8
  %gep.dst = getelementptr i8, ptr %dst, i8 %iv
  store i8 %l.1, ptr %gep.dst, align 2
  %iv.next = add nsw nuw i8 %iv, 1
  %ec = icmp eq i8 %iv.next, %n
  br i1 %ec, label %exit, label %loop

exit:
  ret void
}