llvm/test/Transforms/GVN/PRE/pre-loop-load-through-select.ll

; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
; RUN: opt -passes='require<domtree>,loop(loop-simplifycfg),gvn' -enable-split-backedge-in-load-pre -S %s | FileCheck %s

define i32 @test_pointer_phi_select_same_object(i32* %ptr, i32* %end)  {
; CHECK-LABEL: @test_pointer_phi_select_same_object(
; CHECK-NEXT:  entry:
; CHECK-NEXT:    [[START_PTR:%.*]] = getelementptr inbounds i32, i32* [[PTR:%.*]], i64 1
; CHECK-NEXT:    [[L_2_PRE:%.*]] = load i32, i32* [[PTR]], align 4
; CHECK-NEXT:    br label [[LOOP:%.*]]
; CHECK:       loop:
; CHECK-NEXT:    [[L_2:%.*]] = phi i32 [ [[L_2_PRE]], [[ENTRY:%.*]] ], [ [[TMP0:%.*]], [[LOOP]] ]
; CHECK-NEXT:    [[PTR_IV:%.*]] = phi i32* [ [[START_PTR]], [[ENTRY]] ], [ [[PTR_IV_NEXT:%.*]], [[LOOP]] ]
; CHECK-NEXT:    [[MIN_PTR:%.*]] = phi i32* [ [[PTR]], [[ENTRY]] ], [ [[MIN_SELECT:%.*]], [[LOOP]] ]
; CHECK-NEXT:    [[L_1:%.*]] = load i32, i32* [[PTR_IV]], align 4
; CHECK-NEXT:    [[CMP_I_I_I:%.*]] = icmp ult i32 [[L_1]], [[L_2]]
; CHECK-NEXT:    [[TMP0]] = select i1 [[CMP_I_I_I]], i32 [[L_1]], i32 [[L_2]]
; CHECK-NEXT:    [[MIN_SELECT]] = select i1 [[CMP_I_I_I]], i32* [[PTR_IV]], i32* [[MIN_PTR]]
; CHECK-NEXT:    [[PTR_IV_NEXT]] = getelementptr inbounds i32, i32* [[PTR_IV]], i64 1
; CHECK-NEXT:    [[EC:%.*]] = icmp eq i32* [[PTR_IV_NEXT]], [[END:%.*]]
; CHECK-NEXT:    br i1 [[EC]], label [[EXIT:%.*]], label [[LOOP]]
; CHECK:       exit:
; CHECK-NEXT:    [[RES:%.*]] = load i32, i32* [[MIN_SELECT]], align 4
; CHECK-NEXT:    ret i32 [[RES]]
;
entry:
  %start.ptr = getelementptr inbounds i32, i32* %ptr, i64 1
  br label %loop

loop:
  %ptr.iv = phi i32* [ %start.ptr, %entry ], [ %ptr.iv.next, %loop ]
  %min.ptr = phi i32* [ %ptr, %entry ], [ %min.select, %loop ]
  %l.1 = load i32, i32* %ptr.iv, align 4
  %l.2 = load i32, i32* %min.ptr, align 4
  %cmp.i.i.i = icmp ult i32 %l.1, %l.2
  %min.select  = select i1 %cmp.i.i.i, i32* %ptr.iv, i32* %min.ptr
  %ptr.iv.next = getelementptr inbounds i32, i32* %ptr.iv, i64 1
  %ec = icmp eq i32* %ptr.iv.next, %end
  br i1 %ec, label %exit, label %loop

exit:
  %res = load i32, i32* %min.select, align 4
  ret i32 %res
}

define i32 @test_pointer_phi_select_same_object_lcssa(i32* %ptr, i32* %end)  {
; CHECK-LABEL: @test_pointer_phi_select_same_object_lcssa(
; CHECK-NEXT:  entry:
; CHECK-NEXT:    [[START_PTR:%.*]] = getelementptr inbounds i32, i32* [[PTR:%.*]], i64 1
; CHECK-NEXT:    [[L_2_PRE:%.*]] = load i32, i32* [[PTR]], align 4
; CHECK-NEXT:    br label [[LOOP:%.*]]
; CHECK:       loop:
; CHECK-NEXT:    [[L_2:%.*]] = phi i32 [ [[L_2_PRE]], [[ENTRY:%.*]] ], [ [[TMP0:%.*]], [[LOOP]] ]
; CHECK-NEXT:    [[PTR_IV:%.*]] = phi i32* [ [[START_PTR]], [[ENTRY]] ], [ [[PTR_IV_NEXT:%.*]], [[LOOP]] ]
; CHECK-NEXT:    [[MIN_PTR:%.*]] = phi i32* [ [[PTR]], [[ENTRY]] ], [ [[MIN_SELECT:%.*]], [[LOOP]] ]
; CHECK-NEXT:    [[L_1:%.*]] = load i32, i32* [[PTR_IV]], align 4
; CHECK-NEXT:    [[CMP_I_I_I:%.*]] = icmp ult i32 [[L_1]], [[L_2]]
; CHECK-NEXT:    [[TMP0]] = select i1 [[CMP_I_I_I]], i32 [[L_1]], i32 [[L_2]]
; CHECK-NEXT:    [[MIN_SELECT]] = select i1 [[CMP_I_I_I]], i32* [[PTR_IV]], i32* [[MIN_PTR]]
; CHECK-NEXT:    [[PTR_IV_NEXT]] = getelementptr inbounds i32, i32* [[PTR_IV]], i64 1
; CHECK-NEXT:    [[EC:%.*]] = icmp eq i32* [[PTR_IV_NEXT]], [[END:%.*]]
; CHECK-NEXT:    br i1 [[EC]], label [[EXIT:%.*]], label [[LOOP]]
; CHECK:       exit:
; CHECK-NEXT:    [[RES:%.*]] = load i32, i32* [[MIN_SELECT]], align 4
; CHECK-NEXT:    ret i32 [[RES]]
;
entry:
  %start.ptr = getelementptr inbounds i32, i32* %ptr, i64 1
  br label %loop

loop:
  %ptr.iv = phi i32* [ %start.ptr, %entry ], [ %ptr.iv.next, %loop ]
  %min.ptr = phi i32* [ %ptr, %entry ], [ %min.select, %loop ]
  %l.1 = load i32, i32* %ptr.iv, align 4
  %l.2 = load i32, i32* %min.ptr, align 4
  %cmp.i.i.i = icmp ult i32 %l.1, %l.2
  %min.select  = select i1 %cmp.i.i.i, i32* %ptr.iv, i32* %min.ptr
  %ptr.iv.next = getelementptr inbounds i32, i32* %ptr.iv, i64 1
  %ec = icmp eq i32* %ptr.iv.next, %end
  br i1 %ec, label %exit, label %loop

exit:
  %lcssa.min = phi i32* [ %min.select, %loop ]
  %res = load i32, i32* %lcssa.min, align 4
  ret i32 %res
}

define i32 @test_pointer_phi_select_different_objects(i32* %A, i32 *%B, i32* %end)  {
; CHECK-LABEL: @test_pointer_phi_select_different_objects(
; CHECK-NEXT:  entry:
; CHECK-NEXT:    [[L_2_PRE:%.*]] = load i32, i32* [[B:%.*]], align 4
; CHECK-NEXT:    br label [[LOOP:%.*]]
; CHECK:       loop:
; CHECK-NEXT:    [[L_2:%.*]] = phi i32 [ [[L_2_PRE]], [[ENTRY:%.*]] ], [ [[TMP0:%.*]], [[LOOP]] ]
; CHECK-NEXT:    [[PTR_IV:%.*]] = phi i32* [ [[A:%.*]], [[ENTRY]] ], [ [[PTR_IV_NEXT:%.*]], [[LOOP]] ]
; CHECK-NEXT:    [[MIN_PTR:%.*]] = phi i32* [ [[B]], [[ENTRY]] ], [ [[MIN_SELECT:%.*]], [[LOOP]] ]
; CHECK-NEXT:    [[L_1:%.*]] = load i32, i32* [[PTR_IV]], align 4
; CHECK-NEXT:    [[CMP_I_I_I:%.*]] = icmp ult i32 [[L_1]], [[L_2]]
; CHECK-NEXT:    [[TMP0]] = select i1 [[CMP_I_I_I]], i32 [[L_1]], i32 [[L_2]]
; CHECK-NEXT:    [[MIN_SELECT]] = select i1 [[CMP_I_I_I]], i32* [[PTR_IV]], i32* [[MIN_PTR]]
; CHECK-NEXT:    [[PTR_IV_NEXT]] = getelementptr inbounds i32, i32* [[PTR_IV]], i64 1
; CHECK-NEXT:    [[EC:%.*]] = icmp eq i32* [[PTR_IV_NEXT]], [[END:%.*]]
; CHECK-NEXT:    br i1 [[EC]], label [[EXIT:%.*]], label [[LOOP]]
; CHECK:       exit:
; CHECK-NEXT:    [[RES:%.*]] = load i32, i32* [[MIN_SELECT]], align 4
; CHECK-NEXT:    ret i32 [[RES]]
;
entry:
  br label %loop

loop:
  %ptr.iv = phi i32* [ %A, %entry ], [ %ptr.iv.next, %loop ]
  %min.ptr = phi i32* [ %B, %entry ], [ %min.select, %loop ]
  %l.1 = load i32, i32* %ptr.iv, align 4
  %l.2 = load i32, i32* %min.ptr, align 4
  %cmp.i.i.i = icmp ult i32 %l.1, %l.2
  %min.select  = select i1 %cmp.i.i.i, i32* %ptr.iv, i32* %min.ptr
  %ptr.iv.next = getelementptr inbounds i32, i32* %ptr.iv, i64 1
  %ec = icmp eq i32* %ptr.iv.next, %end
  br i1 %ec, label %exit, label %loop

exit:
  %res = load i32, i32* %min.select, align 4
  ret i32 %res
}

define i32 @test_pointer_phi_select_same_object_multiple_loads_1(i32* %ptr, i32* %end)  {
; CHECK-LABEL: @test_pointer_phi_select_same_object_multiple_loads_1(
; CHECK-NEXT:  entry:
; CHECK-NEXT:    [[START_PTR:%.*]] = getelementptr inbounds i32, i32* [[PTR:%.*]], i64 1
; CHECK-NEXT:    [[L_2_PRE:%.*]] = load i32, i32* [[PTR]], align 4
; CHECK-NEXT:    br label [[LOOP:%.*]]
; CHECK:       loop:
; CHECK-NEXT:    [[L_2:%.*]] = phi i32 [ [[L_2_PRE]], [[ENTRY:%.*]] ], [ [[TMP0:%.*]], [[LOOP]] ]
; CHECK-NEXT:    [[PTR_IV:%.*]] = phi i32* [ [[START_PTR]], [[ENTRY]] ], [ [[PTR_IV_NEXT:%.*]], [[LOOP]] ]
; CHECK-NEXT:    [[MIN_PTR:%.*]] = phi i32* [ [[PTR]], [[ENTRY]] ], [ [[MIN_SELECT:%.*]], [[LOOP]] ]
; CHECK-NEXT:    [[L_1:%.*]] = load i32, i32* [[PTR_IV]], align 4
; CHECK-NEXT:    [[CMP_I_I_I:%.*]] = icmp ult i32 [[L_1]], [[L_2]]
; CHECK-NEXT:    [[TMP0]] = select i1 [[CMP_I_I_I]], i32 [[L_1]], i32 [[L_2]]
; CHECK-NEXT:    [[MIN_SELECT]] = select i1 [[CMP_I_I_I]], i32* [[PTR_IV]], i32* [[MIN_PTR]]
; CHECK-NEXT:    [[PTR_IV_NEXT]] = getelementptr inbounds i32, i32* [[PTR_IV]], i64 1
; CHECK-NEXT:    [[EC:%.*]] = icmp eq i32* [[PTR_IV_NEXT]], [[END:%.*]]
; CHECK-NEXT:    br i1 [[EC]], label [[EXIT:%.*]], label [[LOOP]]
; CHECK:       exit:
; CHECK-NEXT:    [[RES:%.*]] = load i32, i32* [[MIN_SELECT]], align 4
; CHECK-NEXT:    ret i32 [[RES]]
;
entry:
  %start.ptr = getelementptr inbounds i32, i32* %ptr, i64 1
  br label %loop

loop:
  %ptr.iv = phi i32* [ %start.ptr, %entry ], [ %ptr.iv.next, %loop ]
  %min.ptr = phi i32* [ %ptr, %entry ], [ %min.select, %loop ]
  %l.1 = load i32, i32* %ptr.iv, align 4
  %l.2 = load i32, i32* %min.ptr, align 4
  %cmp.i.i.i = icmp ult i32 %l.1, %l.2
  %min.select  = select i1 %cmp.i.i.i, i32* %ptr.iv, i32* %min.ptr
  %l.3 = load i32, i32* %min.ptr, align 4
  %ptr.iv.next = getelementptr inbounds i32, i32* %ptr.iv, i64 1
  %ec = icmp eq i32* %ptr.iv.next, %end
  br i1 %ec, label %exit, label %loop

exit:
  %res = load i32, i32* %min.select, align 4
  ret i32 %res
}

define i32 @test_pointer_phi_select_same_object_multiple_loads_2(i32* %ptr, i32* %end)  {
; CHECK-LABEL: @test_pointer_phi_select_same_object_multiple_loads_2(
; CHECK-NEXT:  entry:
; CHECK-NEXT:    [[START_PTR:%.*]] = getelementptr inbounds i32, i32* [[PTR:%.*]], i64 1
; CHECK-NEXT:    [[L_2_PRE:%.*]] = load i32, i32* [[PTR]], align 4
; CHECK-NEXT:    br label [[LOOP:%.*]]
; CHECK:       loop:
; CHECK-NEXT:    [[L_2:%.*]] = phi i32 [ [[L_2_PRE]], [[ENTRY:%.*]] ], [ [[TMP0:%.*]], [[LOOP]] ]
; CHECK-NEXT:    [[PTR_IV:%.*]] = phi i32* [ [[START_PTR]], [[ENTRY]] ], [ [[PTR_IV_NEXT:%.*]], [[LOOP]] ]
; CHECK-NEXT:    [[MIN_PTR:%.*]] = phi i32* [ [[PTR]], [[ENTRY]] ], [ [[MIN_SELECT:%.*]], [[LOOP]] ]
; CHECK-NEXT:    [[L_1:%.*]] = load i32, i32* [[PTR_IV]], align 4
; CHECK-NEXT:    [[CMP_I_I_I:%.*]] = icmp ult i32 [[L_1]], [[L_2]]
; CHECK-NEXT:    [[TMP0]] = select i1 [[CMP_I_I_I]], i32 [[L_1]], i32 [[L_2]]
; CHECK-NEXT:    [[MIN_SELECT]] = select i1 [[CMP_I_I_I]], i32* [[PTR_IV]], i32* [[MIN_PTR]]
; CHECK-NEXT:    [[PTR_IV_NEXT]] = getelementptr inbounds i32, i32* [[PTR_IV]], i64 1
; CHECK-NEXT:    [[EC:%.*]] = icmp eq i32* [[PTR_IV_NEXT]], [[END:%.*]]
; CHECK-NEXT:    br i1 [[EC]], label [[EXIT:%.*]], label [[LOOP]]
; CHECK:       exit:
; CHECK-NEXT:    [[RES:%.*]] = load i32, i32* [[MIN_SELECT]], align 4
; CHECK-NEXT:    ret i32 [[RES]]
;
entry:
  %start.ptr = getelementptr inbounds i32, i32* %ptr, i64 1
  br label %loop

loop:
  %ptr.iv = phi i32* [ %start.ptr, %entry ], [ %ptr.iv.next, %loop ]
  %min.ptr = phi i32* [ %ptr, %entry ], [ %min.select, %loop ]
  %l.1 = load i32, i32* %ptr.iv, align 4
  %l.2 = load i32, i32* %min.ptr, align 4
  %cmp.i.i.i = icmp ult i32 %l.1, %l.2
  %min.select  = select i1 %cmp.i.i.i, i32* %ptr.iv, i32* %min.ptr
  %l.3 = load i32, i32* %ptr.iv, align 4
  %ptr.iv.next = getelementptr inbounds i32, i32* %ptr.iv, i64 1
  %ec = icmp eq i32* %ptr.iv.next, %end
  br i1 %ec, label %exit, label %loop

exit:
  %res = load i32, i32* %min.select, align 4
  ret i32 %res
}

define i32 @test_pointer_phi_select_load_after(i32* %A, i32 *%B, i32* %end)  {
; CHECK-LABEL: @test_pointer_phi_select_load_after(
; CHECK-NEXT:  entry:
; CHECK-NEXT:    [[L_2_PRE:%.*]] = load i32, i32* [[B:%.*]], align 4
; CHECK-NEXT:    br label [[LOOP:%.*]]
; CHECK:       loop:
; CHECK-NEXT:    [[L_2:%.*]] = phi i32 [ [[L_2_PRE]], [[ENTRY:%.*]] ], [ [[L_3:%.*]], [[LOOP]] ]
; CHECK-NEXT:    [[PTR_IV:%.*]] = phi i32* [ [[A:%.*]], [[ENTRY]] ], [ [[PTR_IV_NEXT:%.*]], [[LOOP]] ]
; CHECK-NEXT:    [[MIN_PTR:%.*]] = phi i32* [ [[B]], [[ENTRY]] ], [ [[MIN_SELECT:%.*]], [[LOOP]] ]
; CHECK-NEXT:    [[L_1:%.*]] = load i32, i32* [[PTR_IV]], align 4
; CHECK-NEXT:    [[CMP_I_I_I:%.*]] = icmp ult i32 [[L_1]], [[L_2]]
; CHECK-NEXT:    [[MIN_SELECT]] = select i1 [[CMP_I_I_I]], i32* [[PTR_IV]], i32* [[MIN_PTR]]
; CHECK-NEXT:    [[L_3]] = load i32, i32* [[MIN_SELECT]], align 4
; CHECK-NEXT:    [[PTR_IV_NEXT]] = getelementptr inbounds i32, i32* [[PTR_IV]], i32 [[L_3]]
; CHECK-NEXT:    [[EC:%.*]] = icmp eq i32* [[PTR_IV_NEXT]], [[END:%.*]]
; CHECK-NEXT:    br i1 [[EC]], label [[EXIT:%.*]], label [[LOOP]]
; CHECK:       exit:
; CHECK-NEXT:    ret i32 [[L_3]]
;
entry:
  br label %loop

loop:
  %ptr.iv = phi i32* [ %A, %entry ], [ %ptr.iv.next, %loop ]
  %min.ptr = phi i32* [ %B, %entry ], [ %min.select, %loop ]
  %l.1 = load i32, i32* %ptr.iv, align 4
  %l.2 = load i32, i32* %min.ptr, align 4
  %cmp.i.i.i = icmp ult i32 %l.1, %l.2
  %min.select  = select i1 %cmp.i.i.i, i32* %ptr.iv, i32* %min.ptr
  %l.3 = load i32, i32* %min.select, align 4
  %ptr.iv.next = getelementptr inbounds i32, i32* %ptr.iv, i32 %l.3
  %ec = icmp eq i32* %ptr.iv.next, %end
  br i1 %ec, label %exit, label %loop

exit:
  %res = load i32, i32* %min.select, align 4
  ret i32 %res
}

define i32 @test_pointer_phi_select_same_object_split_edge(i32* %ptr, i32* %end, i1 %c)  {
; CHECK-LABEL: @test_pointer_phi_select_same_object_split_edge(
; CHECK-NEXT:  entry:
; CHECK-NEXT:    [[START_PTR:%.*]] = getelementptr inbounds i32, i32* [[PTR:%.*]], i64 1
; CHECK-NEXT:    br i1 [[C:%.*]], label [[EXIT:%.*]], label [[LOOP_PREHEADER:%.*]]
; CHECK:       loop.preheader:
; CHECK-NEXT:    [[L_2_PRE:%.*]] = load i32, i32* [[PTR]], align 4
; CHECK-NEXT:    br label [[LOOP:%.*]]
; CHECK:       loop:
; CHECK-NEXT:    [[L_2:%.*]] = phi i32 [ [[TMP0:%.*]], [[LOOP]] ], [ [[L_2_PRE]], [[LOOP_PREHEADER]] ]
; CHECK-NEXT:    [[PTR_IV:%.*]] = phi i32* [ [[PTR_IV_NEXT:%.*]], [[LOOP]] ], [ [[START_PTR]], [[LOOP_PREHEADER]] ]
; CHECK-NEXT:    [[MIN_PTR:%.*]] = phi i32* [ [[MIN_SELECT:%.*]], [[LOOP]] ], [ [[PTR]], [[LOOP_PREHEADER]] ]
; CHECK-NEXT:    [[L_1:%.*]] = load i32, i32* [[PTR_IV]], align 4
; CHECK-NEXT:    [[CMP_I_I_I:%.*]] = icmp ult i32 [[L_1]], [[L_2]]
; CHECK-NEXT:    [[TMP0]] = select i1 [[CMP_I_I_I]], i32 [[L_1]], i32 [[L_2]]
; CHECK-NEXT:    [[MIN_SELECT]] = select i1 [[CMP_I_I_I]], i32* [[PTR_IV]], i32* [[MIN_PTR]]
; CHECK-NEXT:    [[PTR_IV_NEXT]] = getelementptr inbounds i32, i32* [[PTR_IV]], i64 1
; CHECK-NEXT:    [[EC:%.*]] = icmp eq i32* [[PTR_IV_NEXT]], [[END:%.*]]
; CHECK-NEXT:    br i1 [[EC]], label [[LOOP_EXIT:%.*]], label [[LOOP]]
; CHECK:       loop.exit:
; CHECK-NEXT:    br label [[EXIT]]
; CHECK:       exit:
; CHECK-NEXT:    [[LCSSA_PHI_2:%.*]] = phi i32* [ [[END]], [[ENTRY:%.*]] ], [ [[MIN_SELECT]], [[LOOP_EXIT]] ]
; CHECK-NEXT:    [[RES:%.*]] = load i32, i32* [[LCSSA_PHI_2]], align 4
; CHECK-NEXT:    ret i32 [[RES]]
;
entry:
  %start.ptr = getelementptr inbounds i32, i32* %ptr, i64 1
  br i1 %c, label %exit, label %loop

loop:
  %ptr.iv = phi i32* [ %start.ptr, %entry ], [ %ptr.iv.next, %loop ]
  %min.ptr = phi i32* [ %ptr, %entry ], [ %min.select, %loop ]
  %l.1 = load i32, i32* %ptr.iv, align 4
  %l.2 = load i32, i32* %min.ptr, align 4
  %cmp.i.i.i = icmp ult i32 %l.1, %l.2
  %min.select  = select i1 %cmp.i.i.i, i32* %ptr.iv, i32* %min.ptr
  %ptr.iv.next = getelementptr inbounds i32, i32* %ptr.iv, i64 1
  %ec = icmp eq i32* %ptr.iv.next, %end
  br i1 %ec, label %loop.exit, label %loop

loop.exit:
  %lcssa.phi.1 = phi i32* [ %min.select, %loop ]
  br label %exit

exit:
  %lcssa.phi.2 = phi i32* [ %end, %entry ], [ %lcssa.phi.1, %loop.exit ]
  %res = load i32, i32* %lcssa.phi.2, align 4
  ret i32 %res
}


declare void @may_throw() readonly

define i32 @test_pointer_phi_select_load_may_not_execute_1(i32* %A, i32 *%B, i32* %end)  {
; CHECK-LABEL: @test_pointer_phi_select_load_may_not_execute_1(
; CHECK-NEXT:  entry:
; CHECK-NEXT:    br label [[LOOP:%.*]]
; CHECK:       loop:
; CHECK-NEXT:    [[PTR_IV:%.*]] = phi i32* [ [[A:%.*]], [[ENTRY:%.*]] ], [ [[PTR_IV_NEXT:%.*]], [[LOOP]] ]
; CHECK-NEXT:    [[MIN_PTR:%.*]] = phi i32* [ [[B:%.*]], [[ENTRY]] ], [ [[MIN_SELECT:%.*]], [[LOOP]] ]
; CHECK-NEXT:    call void @may_throw()
; CHECK-NEXT:    [[L_1:%.*]] = load i32, i32* [[PTR_IV]], align 4
; CHECK-NEXT:    [[L_2:%.*]] = load i32, i32* [[MIN_PTR]], align 4
; CHECK-NEXT:    [[CMP_I_I_I:%.*]] = icmp ult i32 [[L_1]], [[L_2]]
; CHECK-NEXT:    [[MIN_SELECT]] = select i1 [[CMP_I_I_I]], i32* [[PTR_IV]], i32* [[MIN_PTR]]
; CHECK-NEXT:    [[PTR_IV_NEXT]] = getelementptr inbounds i32, i32* [[PTR_IV]], i64 1
; CHECK-NEXT:    [[EC:%.*]] = icmp eq i32* [[PTR_IV_NEXT]], [[END:%.*]]
; CHECK-NEXT:    br i1 [[EC]], label [[EXIT:%.*]], label [[LOOP]]
; CHECK:       exit:
; CHECK-NEXT:    [[RES:%.*]] = load i32, i32* [[MIN_SELECT]], align 4
; CHECK-NEXT:    ret i32 [[RES]]
;
entry:
  br label %loop

loop:
  %ptr.iv = phi i32* [ %A, %entry ], [ %ptr.iv.next, %loop ]
  %min.ptr = phi i32* [ %B, %entry ], [ %min.select, %loop ]
  call void @may_throw()
  %l.1 = load i32, i32* %ptr.iv, align 4
  %l.2 = load i32, i32* %min.ptr, align 4
  %cmp.i.i.i = icmp ult i32 %l.1, %l.2
  %min.select  = select i1 %cmp.i.i.i, i32* %ptr.iv, i32* %min.ptr
  %ptr.iv.next = getelementptr inbounds i32, i32* %ptr.iv, i64 1
  %ec = icmp eq i32* %ptr.iv.next, %end
  br i1 %ec, label %exit, label %loop

exit:
  %res = load i32, i32* %min.select, align 4
  ret i32 %res
}

define i32 @test_pointer_phi_select_load_may_not_execute_2(i32* %A, i32 *%B, i32* %end)  {
; CHECK-LABEL: @test_pointer_phi_select_load_may_not_execute_2(
; CHECK-NEXT:  entry:
; CHECK-NEXT:    br label [[LOOP:%.*]]
; CHECK:       loop:
; CHECK-NEXT:    [[PTR_IV:%.*]] = phi i32* [ [[A:%.*]], [[ENTRY:%.*]] ], [ [[PTR_IV_NEXT:%.*]], [[LOOP]] ]
; CHECK-NEXT:    [[MIN_PTR:%.*]] = phi i32* [ [[B:%.*]], [[ENTRY]] ], [ [[MIN_SELECT:%.*]], [[LOOP]] ]
; CHECK-NEXT:    [[L_1:%.*]] = load i32, i32* [[PTR_IV]], align 4
; CHECK-NEXT:    call void @may_throw()
; CHECK-NEXT:    [[L_2:%.*]] = load i32, i32* [[MIN_PTR]], align 4
; CHECK-NEXT:    [[CMP_I_I_I:%.*]] = icmp ult i32 [[L_1]], [[L_2]]
; CHECK-NEXT:    [[MIN_SELECT]] = select i1 [[CMP_I_I_I]], i32* [[PTR_IV]], i32* [[MIN_PTR]]
; CHECK-NEXT:    [[PTR_IV_NEXT]] = getelementptr inbounds i32, i32* [[PTR_IV]], i64 1
; CHECK-NEXT:    [[EC:%.*]] = icmp eq i32* [[PTR_IV_NEXT]], [[END:%.*]]
; CHECK-NEXT:    br i1 [[EC]], label [[EXIT:%.*]], label [[LOOP]]
; CHECK:       exit:
; CHECK-NEXT:    [[RES:%.*]] = load i32, i32* [[MIN_SELECT]], align 4
; CHECK-NEXT:    ret i32 [[RES]]
;
entry:
  br label %loop

loop:
  %ptr.iv = phi i32* [ %A, %entry ], [ %ptr.iv.next, %loop ]
  %min.ptr = phi i32* [ %B, %entry ], [ %min.select, %loop ]
  %l.1 = load i32, i32* %ptr.iv, align 4
  call void @may_throw()
  %l.2 = load i32, i32* %min.ptr, align 4
  %cmp.i.i.i = icmp ult i32 %l.1, %l.2
  %min.select  = select i1 %cmp.i.i.i, i32* %ptr.iv, i32* %min.ptr
  %ptr.iv.next = getelementptr inbounds i32, i32* %ptr.iv, i64 1
  %ec = icmp eq i32* %ptr.iv.next, %end
  br i1 %ec, label %exit, label %loop

exit:
  %res = load i32, i32* %min.select, align 4
  ret i32 %res
}

define i32 @test_pointer_phi_select_same_object_store_1(i32* %ptr, i32* %end)  {
; CHECK-LABEL: @test_pointer_phi_select_same_object_store_1(
; CHECK-NEXT:  entry:
; CHECK-NEXT:    [[START_PTR:%.*]] = getelementptr inbounds i32, i32* [[PTR:%.*]], i64 1
; CHECK-NEXT:    br label [[LOOP:%.*]]
; CHECK:       loop:
; CHECK-NEXT:    [[PTR_IV:%.*]] = phi i32* [ [[START_PTR]], [[ENTRY:%.*]] ], [ [[PTR_IV_NEXT:%.*]], [[LOOP]] ]
; CHECK-NEXT:    [[MIN_PTR:%.*]] = phi i32* [ [[PTR]], [[ENTRY]] ], [ [[MIN_SELECT:%.*]], [[LOOP]] ]
; CHECK-NEXT:    store i32 3, i32* [[MIN_PTR]], align 4
; CHECK-NEXT:    [[L_1:%.*]] = load i32, i32* [[PTR_IV]], align 4
; CHECK-NEXT:    [[CMP_I_I_I:%.*]] = icmp ult i32 [[L_1]], 3
; CHECK-NEXT:    [[MIN_SELECT]] = select i1 [[CMP_I_I_I]], i32* [[PTR_IV]], i32* [[MIN_PTR]]
; CHECK-NEXT:    [[PTR_IV_NEXT]] = getelementptr inbounds i32, i32* [[PTR_IV]], i64 1
; CHECK-NEXT:    [[EC:%.*]] = icmp eq i32* [[PTR_IV_NEXT]], [[END:%.*]]
; CHECK-NEXT:    br i1 [[EC]], label [[EXIT:%.*]], label [[LOOP]]
; CHECK:       exit:
; CHECK-NEXT:    [[RES:%.*]] = load i32, i32* [[MIN_SELECT]], align 4
; CHECK-NEXT:    ret i32 [[RES]]
;
entry:
  %start.ptr = getelementptr inbounds i32, i32* %ptr, i64 1
  br label %loop

loop:
  %ptr.iv = phi i32* [ %start.ptr, %entry ], [ %ptr.iv.next, %loop ]
  %min.ptr = phi i32* [ %ptr, %entry ], [ %min.select, %loop ]
  store i32 3, i32* %min.ptr
  %l.1 = load i32, i32* %ptr.iv, align 4
  %l.2 = load i32, i32* %min.ptr, align 4
  %cmp.i.i.i = icmp ult i32 %l.1, %l.2
  %min.select  = select i1 %cmp.i.i.i, i32* %ptr.iv, i32* %min.ptr
  %ptr.iv.next = getelementptr inbounds i32, i32* %ptr.iv, i64 1
  %ec = icmp eq i32* %ptr.iv.next, %end
  br i1 %ec, label %exit, label %loop

exit:
  %res = load i32, i32* %min.select, align 4
  ret i32 %res
}

define i32 @test_pointer_phi_select_same_object_store_2(i32* %ptr, i32* %end)  {
; CHECK-LABEL: @test_pointer_phi_select_same_object_store_2(
; CHECK-NEXT:  entry:
; CHECK-NEXT:    [[START_PTR:%.*]] = getelementptr inbounds i32, i32* [[PTR:%.*]], i64 1
; CHECK-NEXT:    br label [[LOOP:%.*]]
; CHECK:       loop:
; CHECK-NEXT:    [[PTR_IV:%.*]] = phi i32* [ [[START_PTR]], [[ENTRY:%.*]] ], [ [[PTR_IV_NEXT:%.*]], [[LOOP]] ]
; CHECK-NEXT:    [[MIN_PTR:%.*]] = phi i32* [ [[PTR]], [[ENTRY]] ], [ [[MIN_SELECT:%.*]], [[LOOP]] ]
; CHECK-NEXT:    [[L_1:%.*]] = load i32, i32* [[PTR_IV]], align 4
; CHECK-NEXT:    [[L_2:%.*]] = load i32, i32* [[MIN_PTR]], align 4
; CHECK-NEXT:    store i32 3, i32* [[MIN_PTR]], align 4
; CHECK-NEXT:    [[CMP_I_I_I:%.*]] = icmp ult i32 [[L_1]], [[L_2]]
; CHECK-NEXT:    [[MIN_SELECT]] = select i1 [[CMP_I_I_I]], i32* [[PTR_IV]], i32* [[MIN_PTR]]
; CHECK-NEXT:    [[PTR_IV_NEXT]] = getelementptr inbounds i32, i32* [[PTR_IV]], i64 1
; CHECK-NEXT:    [[EC:%.*]] = icmp eq i32* [[PTR_IV_NEXT]], [[END:%.*]]
; CHECK-NEXT:    br i1 [[EC]], label [[EXIT:%.*]], label [[LOOP]]
; CHECK:       exit:
; CHECK-NEXT:    [[RES:%.*]] = load i32, i32* [[MIN_SELECT]], align 4
; CHECK-NEXT:    ret i32 [[RES]]
;
entry:
  %start.ptr = getelementptr inbounds i32, i32* %ptr, i64 1
  br label %loop

loop:
  %ptr.iv = phi i32* [ %start.ptr, %entry ], [ %ptr.iv.next, %loop ]
  %min.ptr = phi i32* [ %ptr, %entry ], [ %min.select, %loop ]
  %l.1 = load i32, i32* %ptr.iv, align 4
  %l.2 = load i32, i32* %min.ptr, align 4
  store i32 3, i32* %min.ptr
  %cmp.i.i.i = icmp ult i32 %l.1, %l.2
  %min.select  = select i1 %cmp.i.i.i, i32* %ptr.iv, i32* %min.ptr
  %ptr.iv.next = getelementptr inbounds i32, i32* %ptr.iv, i64 1
  %ec = icmp eq i32* %ptr.iv.next, %end
  br i1 %ec, label %exit, label %loop

exit:
  %res = load i32, i32* %min.select, align 4
  ret i32 %res
}

define i32 @test_pointer_phi_select_same_object_store_3(i32* %ptr, i32* %end)  {
; CHECK-LABEL: @test_pointer_phi_select_same_object_store_3(
; CHECK-NEXT:  entry:
; CHECK-NEXT:    [[START_PTR:%.*]] = getelementptr inbounds i32, i32* [[PTR:%.*]], i64 1
; CHECK-NEXT:    br label [[LOOP:%.*]]
; CHECK:       loop:
; CHECK-NEXT:    [[PTR_IV:%.*]] = phi i32* [ [[START_PTR]], [[ENTRY:%.*]] ], [ [[PTR_IV_NEXT:%.*]], [[LOOP]] ]
; CHECK-NEXT:    [[MIN_PTR:%.*]] = phi i32* [ [[PTR]], [[ENTRY]] ], [ [[MIN_SELECT:%.*]], [[LOOP]] ]
; CHECK-NEXT:    [[L_1:%.*]] = load i32, i32* [[PTR_IV]], align 4
; CHECK-NEXT:    [[L_2:%.*]] = load i32, i32* [[MIN_PTR]], align 4
; CHECK-NEXT:    [[CMP_I_I_I:%.*]] = icmp ult i32 [[L_1]], [[L_2]]
; CHECK-NEXT:    [[MIN_SELECT]] = select i1 [[CMP_I_I_I]], i32* [[PTR_IV]], i32* [[MIN_PTR]]
; CHECK-NEXT:    [[PTR_IV_NEXT]] = getelementptr inbounds i32, i32* [[PTR_IV]], i64 1
; CHECK-NEXT:    store i32 3, i32* [[MIN_PTR]], align 4
; CHECK-NEXT:    [[EC:%.*]] = icmp eq i32* [[PTR_IV_NEXT]], [[END:%.*]]
; CHECK-NEXT:    br i1 [[EC]], label [[EXIT:%.*]], label [[LOOP]]
; CHECK:       exit:
; CHECK-NEXT:    [[RES:%.*]] = load i32, i32* [[MIN_SELECT]], align 4
; CHECK-NEXT:    ret i32 [[RES]]
;
entry:
  %start.ptr = getelementptr inbounds i32, i32* %ptr, i64 1
  br label %loop

loop:
  %ptr.iv = phi i32* [ %start.ptr, %entry ], [ %ptr.iv.next, %loop ]
  %min.ptr = phi i32* [ %ptr, %entry ], [ %min.select, %loop ]
  %l.1 = load i32, i32* %ptr.iv, align 4
  %l.2 = load i32, i32* %min.ptr, align 4
  %cmp.i.i.i = icmp ult i32 %l.1, %l.2
  %min.select  = select i1 %cmp.i.i.i, i32* %ptr.iv, i32* %min.ptr
  %ptr.iv.next = getelementptr inbounds i32, i32* %ptr.iv, i64 1
  store i32 3, i32* %min.ptr
  %ec = icmp eq i32* %ptr.iv.next, %end
  br i1 %ec, label %exit, label %loop

exit:
  %res = load i32, i32* %min.select, align 4
  ret i32 %res
}

declare void @may_write()

define i32 @test_pointer_phi_select_same_object_may_write_call_1(i32* %ptr, i32* %end)  {
; CHECK-LABEL: @test_pointer_phi_select_same_object_may_write_call_1(
; CHECK-NEXT:  entry:
; CHECK-NEXT:    [[START_PTR:%.*]] = getelementptr inbounds i32, i32* [[PTR:%.*]], i64 1
; CHECK-NEXT:    br label [[LOOP:%.*]]
; CHECK:       loop:
; CHECK-NEXT:    [[PTR_IV:%.*]] = phi i32* [ [[START_PTR]], [[ENTRY:%.*]] ], [ [[PTR_IV_NEXT:%.*]], [[LOOP]] ]
; CHECK-NEXT:    [[MIN_PTR:%.*]] = phi i32* [ [[PTR]], [[ENTRY]] ], [ [[MIN_SELECT:%.*]], [[LOOP]] ]
; CHECK-NEXT:    call void @may_write()
; CHECK-NEXT:    [[L_1:%.*]] = load i32, i32* [[PTR_IV]], align 4
; CHECK-NEXT:    [[L_2:%.*]] = load i32, i32* [[MIN_PTR]], align 4
; CHECK-NEXT:    [[CMP_I_I_I:%.*]] = icmp ult i32 [[L_1]], [[L_2]]
; CHECK-NEXT:    [[MIN_SELECT]] = select i1 [[CMP_I_I_I]], i32* [[PTR_IV]], i32* [[MIN_PTR]]
; CHECK-NEXT:    [[PTR_IV_NEXT]] = getelementptr inbounds i32, i32* [[PTR_IV]], i64 1
; CHECK-NEXT:    [[EC:%.*]] = icmp eq i32* [[PTR_IV_NEXT]], [[END:%.*]]
; CHECK-NEXT:    br i1 [[EC]], label [[EXIT:%.*]], label [[LOOP]]
; CHECK:       exit:
; CHECK-NEXT:    [[RES:%.*]] = load i32, i32* [[MIN_SELECT]], align 4
; CHECK-NEXT:    ret i32 [[RES]]
;
entry:
  %start.ptr = getelementptr inbounds i32, i32* %ptr, i64 1
  br label %loop

loop:
  %ptr.iv = phi i32* [ %start.ptr, %entry ], [ %ptr.iv.next, %loop ]
  %min.ptr = phi i32* [ %ptr, %entry ], [ %min.select, %loop ]
  call void @may_write()
  %l.1 = load i32, i32* %ptr.iv, align 4
  %l.2 = load i32, i32* %min.ptr, align 4
  %cmp.i.i.i = icmp ult i32 %l.1, %l.2
  %min.select  = select i1 %cmp.i.i.i, i32* %ptr.iv, i32* %min.ptr
  %ptr.iv.next = getelementptr inbounds i32, i32* %ptr.iv, i64 1
  %ec = icmp eq i32* %ptr.iv.next, %end
  br i1 %ec, label %exit, label %loop

exit:
  %res = load i32, i32* %min.select, align 4
  ret i32 %res
}

define i32 @test_pointer_phi_select_same_object_may_write_call_2(i32* %ptr, i32* %end)  {
; CHECK-LABEL: @test_pointer_phi_select_same_object_may_write_call_2(
; CHECK-NEXT:  entry:
; CHECK-NEXT:    [[START_PTR:%.*]] = getelementptr inbounds i32, i32* [[PTR:%.*]], i64 1
; CHECK-NEXT:    br label [[LOOP:%.*]]
; CHECK:       loop:
; CHECK-NEXT:    [[PTR_IV:%.*]] = phi i32* [ [[START_PTR]], [[ENTRY:%.*]] ], [ [[PTR_IV_NEXT:%.*]], [[LOOP]] ]
; CHECK-NEXT:    [[MIN_PTR:%.*]] = phi i32* [ [[PTR]], [[ENTRY]] ], [ [[MIN_SELECT:%.*]], [[LOOP]] ]
; CHECK-NEXT:    [[L_1:%.*]] = load i32, i32* [[PTR_IV]], align 4
; CHECK-NEXT:    [[L_2:%.*]] = load i32, i32* [[MIN_PTR]], align 4
; CHECK-NEXT:    call void @may_write()
; CHECK-NEXT:    [[CMP_I_I_I:%.*]] = icmp ult i32 [[L_1]], [[L_2]]
; CHECK-NEXT:    [[MIN_SELECT]] = select i1 [[CMP_I_I_I]], i32* [[PTR_IV]], i32* [[MIN_PTR]]
; CHECK-NEXT:    [[PTR_IV_NEXT]] = getelementptr inbounds i32, i32* [[PTR_IV]], i64 1
; CHECK-NEXT:    [[EC:%.*]] = icmp eq i32* [[PTR_IV_NEXT]], [[END:%.*]]
; CHECK-NEXT:    br i1 [[EC]], label [[EXIT:%.*]], label [[LOOP]]
; CHECK:       exit:
; CHECK-NEXT:    [[RES:%.*]] = load i32, i32* [[MIN_SELECT]], align 4
; CHECK-NEXT:    ret i32 [[RES]]
;
entry:
  %start.ptr = getelementptr inbounds i32, i32* %ptr, i64 1
  br label %loop

loop:
  %ptr.iv = phi i32* [ %start.ptr, %entry ], [ %ptr.iv.next, %loop ]
  %min.ptr = phi i32* [ %ptr, %entry ], [ %min.select, %loop ]
  %l.1 = load i32, i32* %ptr.iv, align 4
  %l.2 = load i32, i32* %min.ptr, align 4
  call void @may_write()
  %cmp.i.i.i = icmp ult i32 %l.1, %l.2
  %min.select  = select i1 %cmp.i.i.i, i32* %ptr.iv, i32* %min.ptr
  %ptr.iv.next = getelementptr inbounds i32, i32* %ptr.iv, i64 1
  %ec = icmp eq i32* %ptr.iv.next, %end
  br i1 %ec, label %exit, label %loop

exit:
  %res = load i32, i32* %min.select, align 4
  ret i32 %res
}

define i32 @test_pointer_phi_select_same_object_may_write_call_3(i32* %ptr, i32* %end)  {
; CHECK-LABEL: @test_pointer_phi_select_same_object_may_write_call_3(
; CHECK-NEXT:  entry:
; CHECK-NEXT:    [[START_PTR:%.*]] = getelementptr inbounds i32, i32* [[PTR:%.*]], i64 1
; CHECK-NEXT:    br label [[LOOP:%.*]]
; CHECK:       loop:
; CHECK-NEXT:    [[PTR_IV:%.*]] = phi i32* [ [[START_PTR]], [[ENTRY:%.*]] ], [ [[PTR_IV_NEXT:%.*]], [[LOOP]] ]
; CHECK-NEXT:    [[MIN_PTR:%.*]] = phi i32* [ [[PTR]], [[ENTRY]] ], [ [[MIN_SELECT:%.*]], [[LOOP]] ]
; CHECK-NEXT:    [[L_1:%.*]] = load i32, i32* [[PTR_IV]], align 4
; CHECK-NEXT:    [[L_2:%.*]] = load i32, i32* [[MIN_PTR]], align 4
; CHECK-NEXT:    [[CMP_I_I_I:%.*]] = icmp ult i32 [[L_1]], [[L_2]]
; CHECK-NEXT:    [[MIN_SELECT]] = select i1 [[CMP_I_I_I]], i32* [[PTR_IV]], i32* [[MIN_PTR]]
; CHECK-NEXT:    call void @may_write()
; CHECK-NEXT:    [[PTR_IV_NEXT]] = getelementptr inbounds i32, i32* [[PTR_IV]], i64 1
; CHECK-NEXT:    [[EC:%.*]] = icmp eq i32* [[PTR_IV_NEXT]], [[END:%.*]]
; CHECK-NEXT:    br i1 [[EC]], label [[EXIT:%.*]], label [[LOOP]]
; CHECK:       exit:
; CHECK-NEXT:    [[RES:%.*]] = load i32, i32* [[MIN_SELECT]], align 4
; CHECK-NEXT:    ret i32 [[RES]]
;
entry:
  %start.ptr = getelementptr inbounds i32, i32* %ptr, i64 1
  br label %loop

loop:
  %ptr.iv = phi i32* [ %start.ptr, %entry ], [ %ptr.iv.next, %loop ]
  %min.ptr = phi i32* [ %ptr, %entry ], [ %min.select, %loop ]
  %l.1 = load i32, i32* %ptr.iv, align 4
  %l.2 = load i32, i32* %min.ptr, align 4
  %cmp.i.i.i = icmp ult i32 %l.1, %l.2
  %min.select  = select i1 %cmp.i.i.i, i32* %ptr.iv, i32* %min.ptr
  call void @may_write()
  %ptr.iv.next = getelementptr inbounds i32, i32* %ptr.iv, i64 1
  %ec = icmp eq i32* %ptr.iv.next, %end
  br i1 %ec, label %exit, label %loop

exit:
  %res = load i32, i32* %min.select, align 4
  ret i32 %res
}

define i32 @test_pointer_phi_select_same_object_header_exit(i32* %ptr, i32* %end)  {
; CHECK-LABEL: @test_pointer_phi_select_same_object_header_exit(
; CHECK-NEXT:  entry:
; CHECK-NEXT:    [[START_PTR:%.*]] = getelementptr inbounds i32, i32* [[PTR:%.*]], i64 1
; CHECK-NEXT:    br label [[LOOP_HEADER:%.*]]
; CHECK:       loop.header:
; CHECK-NEXT:    [[PTR_IV:%.*]] = phi i32* [ [[START_PTR]], [[ENTRY:%.*]] ], [ [[PTR_IV_NEXT:%.*]], [[LOOP_LATCH:%.*]] ]
; CHECK-NEXT:    [[MIN_PTR:%.*]] = phi i32* [ [[PTR]], [[ENTRY]] ], [ [[MIN_SELECT:%.*]], [[LOOP_LATCH]] ]
; CHECK-NEXT:    [[PTR_IV_NEXT]] = getelementptr inbounds i32, i32* [[PTR_IV]], i64 1
; CHECK-NEXT:    [[EC:%.*]] = icmp eq i32* [[PTR_IV_NEXT]], [[END:%.*]]
; CHECK-NEXT:    br i1 [[EC]], label [[EXIT:%.*]], label [[LOOP_LATCH]]
; CHECK:       loop.latch:
; CHECK-NEXT:    [[L_1:%.*]] = load i32, i32* [[PTR_IV]], align 4
; CHECK-NEXT:    [[L_2:%.*]] = load i32, i32* [[MIN_PTR]], align 4
; CHECK-NEXT:    [[CMP_I_I_I:%.*]] = icmp ult i32 [[L_1]], [[L_2]]
; CHECK-NEXT:    [[MIN_SELECT]] = select i1 [[CMP_I_I_I]], i32* [[PTR_IV]], i32* [[MIN_PTR]]
; CHECK-NEXT:    br label [[LOOP_HEADER]]
; CHECK:       exit:
; CHECK-NEXT:    [[RES:%.*]] = load i32, i32* [[MIN_PTR]], align 4
; CHECK-NEXT:    ret i32 [[RES]]
;
entry:
  %start.ptr = getelementptr inbounds i32, i32* %ptr, i64 1
  br label %loop.header

loop.header:
  %ptr.iv = phi i32* [ %start.ptr, %entry ], [ %ptr.iv.next, %loop.latch ]
  %min.ptr = phi i32* [ %ptr, %entry ], [ %min.select, %loop.latch ]
  %ptr.iv.next = getelementptr inbounds i32, i32* %ptr.iv, i64 1
  %ec = icmp eq i32* %ptr.iv.next, %end
  br i1 %ec, label %exit, label %loop.latch

loop.latch:
  %l.1 = load i32, i32* %ptr.iv, align 4
  %l.2 = load i32, i32* %min.ptr, align 4
  %cmp.i.i.i = icmp ult i32 %l.1, %l.2
  %min.select  = select i1 %cmp.i.i.i, i32* %ptr.iv, i32* %min.ptr
  br label %loop.header

exit:
  %res = load i32, i32* %min.ptr, align 4
  ret i32 %res
}

define i32 @test_pointer_phi_select_same_object_ptr_use_cycle(i32* %ptr, i32* %end)  {
; CHECK-LABEL: @test_pointer_phi_select_same_object_ptr_use_cycle(
; CHECK-NEXT:  entry:
; CHECK-NEXT:    [[START_PTR:%.*]] = getelementptr inbounds i32, i32* [[PTR:%.*]], i64 1
; CHECK-NEXT:    [[L_2_PRE:%.*]] = load i32, i32* [[PTR]], align 4
; CHECK-NEXT:    br label [[LOOP:%.*]]
; CHECK:       loop:
; CHECK-NEXT:    [[L_2:%.*]] = phi i32 [ [[L_2_PRE]], [[ENTRY:%.*]] ], [ [[TMP0:%.*]], [[LOOP]] ]
; CHECK-NEXT:    [[PTR_IV:%.*]] = phi i32* [ [[START_PTR]], [[ENTRY]] ], [ [[PTR_IV_NEXT:%.*]], [[LOOP]] ]
; CHECK-NEXT:    [[MIN_PTR:%.*]] = phi i32* [ [[PTR]], [[ENTRY]] ], [ [[MIN_SELECT:%.*]], [[LOOP]] ]
; CHECK-NEXT:    [[L_1:%.*]] = load i32, i32* [[PTR_IV]], align 4
; CHECK-NEXT:    [[CMP_I_I_I:%.*]] = icmp ult i32 [[L_1]], [[L_2]]
; CHECK-NEXT:    [[TMP0]] = select i1 [[CMP_I_I_I]], i32 [[L_1]], i32 [[L_2]]
; CHECK-NEXT:    [[MIN_SELECT]] = select i1 [[CMP_I_I_I]], i32* [[PTR_IV]], i32* [[MIN_PTR]]
; CHECK-NEXT:    [[PTR_IV_NEXT]] = getelementptr inbounds i32, i32* [[PTR_IV]], i64 1
; CHECK-NEXT:    [[EC:%.*]] = icmp eq i32* [[PTR_IV_NEXT]], [[END:%.*]]
; CHECK-NEXT:    br i1 [[EC]], label [[EXIT_PREHEADER:%.*]], label [[LOOP]]
; CHECK:       exit.preheader:
; CHECK-NEXT:    br label [[EXIT:%.*]]
; CHECK:       exit:
; CHECK-NEXT:    [[P:%.*]] = phi i32* [ [[P_NEXT:%.*]], [[EXIT]] ], [ [[MIN_SELECT]], [[EXIT_PREHEADER]] ]
; CHECK-NEXT:    store i32 0, i32* [[P]], align 4
; CHECK-NEXT:    [[P_NEXT]] = getelementptr inbounds i32, i32* [[P]], i64 1
; CHECK-NEXT:    br label [[EXIT]]
;
entry:
  %start.ptr = getelementptr inbounds i32, i32* %ptr, i64 1
  br label %loop

loop:
  %ptr.iv = phi i32* [ %start.ptr, %entry ], [ %ptr.iv.next, %loop ]
  %min.ptr = phi i32* [ %ptr, %entry ], [ %min.select, %loop ]
  %l.1 = load i32, i32* %ptr.iv, align 4
  %l.2 = load i32, i32* %min.ptr, align 4
  %cmp.i.i.i = icmp ult i32 %l.1, %l.2
  %min.select  = select i1 %cmp.i.i.i, i32* %ptr.iv, i32* %min.ptr
  %ptr.iv.next = getelementptr inbounds i32, i32* %ptr.iv, i64 1
  %ec = icmp eq i32* %ptr.iv.next, %end
  br i1 %ec, label %exit, label %loop

exit:
  %p = phi i32* [ %min.select, %loop ], [ %p.next, %exit ]
  store i32 0, i32* %p
  %p.next = getelementptr inbounds i32, i32* %p, i64 1
  br label %exit
}

define i32 @test_pointer_phi_select_same_object_maybe_clobbered_in_exit(i32* %ptr, i32* %end)  {
; CHECK-LABEL: @test_pointer_phi_select_same_object_maybe_clobbered_in_exit(
; CHECK-NEXT:  entry:
; CHECK-NEXT:    [[START_PTR:%.*]] = getelementptr inbounds i32, i32* [[PTR:%.*]], i64 1
; CHECK-NEXT:    [[L_2_PRE:%.*]] = load i32, i32* [[PTR]], align 4
; CHECK-NEXT:    br label [[LOOP:%.*]]
; CHECK:       loop:
; CHECK-NEXT:    [[L_2:%.*]] = phi i32 [ [[L_2_PRE]], [[ENTRY:%.*]] ], [ [[TMP0:%.*]], [[LOOP]] ]
; CHECK-NEXT:    [[PTR_IV:%.*]] = phi i32* [ [[START_PTR]], [[ENTRY]] ], [ [[PTR_IV_NEXT:%.*]], [[LOOP]] ]
; CHECK-NEXT:    [[MIN_PTR:%.*]] = phi i32* [ [[PTR]], [[ENTRY]] ], [ [[MIN_SELECT:%.*]], [[LOOP]] ]
; CHECK-NEXT:    [[L_1:%.*]] = load i32, i32* [[PTR_IV]], align 4
; CHECK-NEXT:    [[CMP_I_I_I:%.*]] = icmp ult i32 [[L_1]], [[L_2]]
; CHECK-NEXT:    [[TMP0]] = select i1 [[CMP_I_I_I]], i32 [[L_1]], i32 [[L_2]]
; CHECK-NEXT:    [[MIN_SELECT]] = select i1 [[CMP_I_I_I]], i32* [[PTR_IV]], i32* [[MIN_PTR]]
; CHECK-NEXT:    [[PTR_IV_NEXT]] = getelementptr inbounds i32, i32* [[PTR_IV]], i64 1
; CHECK-NEXT:    [[EC:%.*]] = icmp eq i32* [[PTR_IV_NEXT]], [[END:%.*]]
; CHECK-NEXT:    br i1 [[EC]], label [[EXIT:%.*]], label [[LOOP]]
; CHECK:       exit:
; CHECK-NEXT:    store i32 0, i32* [[START_PTR]], align 4
; CHECK-NEXT:    [[RES:%.*]] = load i32, i32* [[MIN_SELECT]], align 4
; CHECK-NEXT:    ret i32 [[RES]]
;
entry:
  %start.ptr = getelementptr inbounds i32, i32* %ptr, i64 1
  br label %loop

loop:
  %ptr.iv = phi i32* [ %start.ptr, %entry ], [ %ptr.iv.next, %loop ]
  %min.ptr = phi i32* [ %ptr, %entry ], [ %min.select, %loop ]
  %l.1 = load i32, i32* %ptr.iv, align 4
  %l.2 = load i32, i32* %min.ptr, align 4
  %cmp.i.i.i = icmp ult i32 %l.1, %l.2
  %min.select  = select i1 %cmp.i.i.i, i32* %ptr.iv, i32* %min.ptr
  %ptr.iv.next = getelementptr inbounds i32, i32* %ptr.iv, i64 1
  %ec = icmp eq i32* %ptr.iv.next, %end
  br i1 %ec, label %exit, label %loop

exit:
  store i32 0, i32* %start.ptr
  %res = load i32, i32* %min.select, align 4
  ret i32 %res
}

define i32 @test_pointer_phi_select_same_object_maybe_clobbered_in_exit_2(i32* %ptr, i32* %end)  {
; CHECK-LABEL: @test_pointer_phi_select_same_object_maybe_clobbered_in_exit_2(
; CHECK-NEXT:  entry:
; CHECK-NEXT:    [[START_PTR:%.*]] = getelementptr inbounds i32, i32* [[PTR:%.*]], i64 1
; CHECK-NEXT:    [[L_2_PRE:%.*]] = load i32, i32* [[PTR]], align 4
; CHECK-NEXT:    br label [[LOOP:%.*]]
; CHECK:       loop:
; CHECK-NEXT:    [[L_2:%.*]] = phi i32 [ [[L_2_PRE]], [[ENTRY:%.*]] ], [ [[TMP0:%.*]], [[LOOP]] ]
; CHECK-NEXT:    [[PTR_IV:%.*]] = phi i32* [ [[START_PTR]], [[ENTRY]] ], [ [[PTR_IV_NEXT:%.*]], [[LOOP]] ]
; CHECK-NEXT:    [[MIN_PTR:%.*]] = phi i32* [ [[PTR]], [[ENTRY]] ], [ [[MIN_SELECT:%.*]], [[LOOP]] ]
; CHECK-NEXT:    [[L_1:%.*]] = load i32, i32* [[PTR_IV]], align 4
; CHECK-NEXT:    [[CMP_I_I_I:%.*]] = icmp ult i32 [[L_1]], [[L_2]]
; CHECK-NEXT:    [[TMP0]] = select i1 [[CMP_I_I_I]], i32 [[L_1]], i32 [[L_2]]
; CHECK-NEXT:    [[MIN_SELECT]] = select i1 [[CMP_I_I_I]], i32* [[PTR_IV]], i32* [[MIN_PTR]]
; CHECK-NEXT:    [[PTR_IV_NEXT]] = getelementptr inbounds i32, i32* [[PTR_IV]], i64 1
; CHECK-NEXT:    [[EC:%.*]] = icmp eq i32* [[PTR_IV_NEXT]], [[END:%.*]]
; CHECK-NEXT:    br i1 [[EC]], label [[EXIT_1:%.*]], label [[LOOP]]
; CHECK:       exit.1:
; CHECK-NEXT:    store i32 0, i32* [[START_PTR]], align 4
; CHECK-NEXT:    [[RES:%.*]] = load i32, i32* [[MIN_SELECT]], align 4
; CHECK-NEXT:    ret i32 [[RES]]
;
entry:
  %start.ptr = getelementptr inbounds i32, i32* %ptr, i64 1
  br label %loop

loop:
  %ptr.iv = phi i32* [ %start.ptr, %entry ], [ %ptr.iv.next, %loop ]
  %min.ptr = phi i32* [ %ptr, %entry ], [ %min.select, %loop ]
  %l.1 = load i32, i32* %ptr.iv, align 4
  %l.2 = load i32, i32* %min.ptr, align 4
  %cmp.i.i.i = icmp ult i32 %l.1, %l.2
  %min.select  = select i1 %cmp.i.i.i, i32* %ptr.iv, i32* %min.ptr
  %ptr.iv.next = getelementptr inbounds i32, i32* %ptr.iv, i64 1
  %ec = icmp eq i32* %ptr.iv.next, %end
  br i1 %ec, label %exit.1, label %loop

exit.1:
  %lcssa.min = phi i32* [ %min.select, %loop ]
  store i32 0, i32* %start.ptr
  br label %exit.2

exit.2:
  %res = load i32, i32* %lcssa.min, align 4
  ret i32 %res
}

declare i32 @__CxxFrameHandler3(...)

define i32 @test_pointer_phi_select_same_object_invoke_in_chain(i32* %ptr, i32* %end)  personality i32 (...)* @__CxxFrameHandler3 {
; CHECK-LABEL: @test_pointer_phi_select_same_object_invoke_in_chain(
; CHECK-NEXT:  entry:
; CHECK-NEXT:    [[START_PTR:%.*]] = getelementptr inbounds i32, i32* [[PTR:%.*]], i64 1
; CHECK-NEXT:    [[L_2_PRE:%.*]] = load i32, i32* [[PTR]], align 4
; CHECK-NEXT:    br label [[LOOP:%.*]]
; CHECK:       loop:
; CHECK-NEXT:    [[L_2:%.*]] = phi i32 [ [[L_2_PRE]], [[ENTRY:%.*]] ], [ [[TMP0:%.*]], [[LOOP]] ]
; CHECK-NEXT:    [[PTR_IV:%.*]] = phi i32* [ [[START_PTR]], [[ENTRY]] ], [ [[PTR_IV_NEXT:%.*]], [[LOOP]] ]
; CHECK-NEXT:    [[MIN_PTR:%.*]] = phi i32* [ [[PTR]], [[ENTRY]] ], [ [[MIN_SELECT:%.*]], [[LOOP]] ]
; CHECK-NEXT:    [[L_1:%.*]] = load i32, i32* [[PTR_IV]], align 4
; CHECK-NEXT:    [[CMP_I_I_I:%.*]] = icmp ult i32 [[L_1]], [[L_2]]
; CHECK-NEXT:    [[TMP0]] = select i1 [[CMP_I_I_I]], i32 [[L_1]], i32 [[L_2]]
; CHECK-NEXT:    [[MIN_SELECT]] = select i1 [[CMP_I_I_I]], i32* [[PTR_IV]], i32* [[MIN_PTR]]
; CHECK-NEXT:    [[PTR_IV_NEXT]] = getelementptr inbounds i32, i32* [[PTR_IV]], i64 1
; CHECK-NEXT:    [[EC:%.*]] = icmp eq i32* [[PTR_IV_NEXT]], [[END:%.*]]
; CHECK-NEXT:    br i1 [[EC]], label [[EXIT_1:%.*]], label [[LOOP]]
; CHECK:       exit.1:
; CHECK-NEXT:    store i32 0, i32* [[START_PTR]], align 4
; CHECK-NEXT:    invoke void @may_throw()
; CHECK-NEXT:    to label [[EXIT_2:%.*]] unwind label [[CATCH_OBJECT:%.*]]
; CHECK:       exit.2:
; CHECK-NEXT:    [[RES:%.*]] = load i32, i32* [[MIN_SELECT]], align 4
; CHECK-NEXT:    ret i32 [[RES]]
; CHECK:       catch.object:
; CHECK-NEXT:    [[LP:%.*]] = landingpad { i8*, i32 }
; CHECK-NEXT:    catch i8* null
; CHECK-NEXT:    unreachable
;
entry:
  %start.ptr = getelementptr inbounds i32, i32* %ptr, i64 1
  br label %loop

loop:
  %ptr.iv = phi i32* [ %start.ptr, %entry ], [ %ptr.iv.next, %loop ]
  %min.ptr = phi i32* [ %ptr, %entry ], [ %min.select, %loop ]
  %l.1 = load i32, i32* %ptr.iv, align 4
  %l.2 = load i32, i32* %min.ptr, align 4
  %cmp.i.i.i = icmp ult i32 %l.1, %l.2
  %min.select  = select i1 %cmp.i.i.i, i32* %ptr.iv, i32* %min.ptr
  %ptr.iv.next = getelementptr inbounds i32, i32* %ptr.iv, i64 1
  %ec = icmp eq i32* %ptr.iv.next, %end
  br i1 %ec, label %exit.1, label %loop

exit.1:
  %lcssa.min = phi i32* [ %min.select, %loop ]
  store i32 0, i32* %start.ptr
  invoke void @may_throw()
  to label %exit.2 unwind label %catch.object

exit.2:
  %res = load i32, i32* %lcssa.min, align 4
  ret i32 %res

catch.object:
  %lp = landingpad { i8*, i32 }
  catch i8* null
  unreachable
}

define i32 @test_pointer_phi_select_used_by_others_in_loop(i32* %ptr, i32* %end)  {
; CHECK-LABEL: @test_pointer_phi_select_used_by_others_in_loop(
; CHECK-NEXT:  entry:
; CHECK-NEXT:    [[START_PTR:%.*]] = getelementptr inbounds i32, i32* [[PTR:%.*]], i64 1
; CHECK-NEXT:    [[L_2_PRE:%.*]] = load i32, i32* [[PTR]], align 4
; CHECK-NEXT:    br label [[LOOP:%.*]]
; CHECK:       loop:
; CHECK-NEXT:    [[L_2:%.*]] = phi i32 [ [[L_2_PRE]], [[ENTRY:%.*]] ], [ [[L_3:%.*]], [[LOOP]] ]
; CHECK-NEXT:    [[PTR_IV:%.*]] = phi i32* [ [[START_PTR]], [[ENTRY]] ], [ [[PTR_IV_NEXT:%.*]], [[LOOP]] ]
; CHECK-NEXT:    [[MIN_PTR:%.*]] = phi i32* [ [[PTR]], [[ENTRY]] ], [ [[MIN_SELECT:%.*]], [[LOOP]] ]
; CHECK-NEXT:    [[L_1:%.*]] = load i32, i32* [[PTR_IV]], align 4
; CHECK-NEXT:    [[CMP_I_I_I:%.*]] = icmp ult i32 [[L_1]], [[L_2]]
; CHECK-NEXT:    [[MIN_SELECT]] = select i1 [[CMP_I_I_I]], i32* [[PTR_IV]], i32* [[MIN_PTR]]
; CHECK-NEXT:    [[L_3]] = load i32, i32* [[MIN_SELECT]], align 4
; CHECK-NEXT:    [[PTR_IV_NEXT]] = getelementptr inbounds i32, i32* [[PTR_IV]], i32 [[L_3]]
; CHECK-NEXT:    [[EC:%.*]] = icmp eq i32* [[PTR_IV_NEXT]], [[END:%.*]]
; CHECK-NEXT:    br i1 [[EC]], label [[EXIT:%.*]], label [[LOOP]]
; CHECK:       exit:
; CHECK-NEXT:    ret i32 [[L_3]]
;
entry:
  %start.ptr = getelementptr inbounds i32, i32* %ptr, i64 1
  br label %loop

loop:
  %ptr.iv = phi i32* [ %start.ptr, %entry ], [ %ptr.iv.next, %loop ]
  %min.ptr = phi i32* [ %ptr, %entry ], [ %min.select, %loop ]
  %l.1 = load i32, i32* %ptr.iv, align 4
  %l.2 = load i32, i32* %min.ptr, align 4
  %cmp.i.i.i = icmp ult i32 %l.1, %l.2
  %min.select  = select i1 %cmp.i.i.i, i32* %ptr.iv, i32* %min.ptr
  %l.3 = load i32, i32* %min.select, align 4
  %ptr.iv.next = getelementptr inbounds i32, i32* %ptr.iv, i32 %l.3
  %ec = icmp eq i32* %ptr.iv.next, %end
  br i1 %ec, label %exit, label %loop

exit:
  %res = load i32, i32* %min.select, align 4
  ret i32 %res
}

define i32 @test_pointer_phi_used_by_others_in_loop_1(i32* %ptr, i32* %end)  {
; CHECK-LABEL: @test_pointer_phi_used_by_others_in_loop_1(
; CHECK-NEXT:  entry:
; CHECK-NEXT:    [[START_PTR:%.*]] = getelementptr inbounds i32, i32* [[PTR:%.*]], i64 1
; CHECK-NEXT:    [[L_2_PRE:%.*]] = load i32, i32* [[PTR]], align 4
; CHECK-NEXT:    br label [[LOOP:%.*]]
; CHECK:       loop:
; CHECK-NEXT:    [[L_3:%.*]] = phi i32 [ [[L_2_PRE]], [[ENTRY:%.*]] ], [ [[L_3_PRE:%.*]], [[LOOP_LOOP_CRIT_EDGE:%.*]] ]
; CHECK-NEXT:    [[L_2:%.*]] = phi i32 [ [[L_2_PRE]], [[ENTRY]] ], [ [[TMP0:%.*]], [[LOOP_LOOP_CRIT_EDGE]] ]
; CHECK-NEXT:    [[PTR_IV:%.*]] = phi i32* [ [[START_PTR]], [[ENTRY]] ], [ [[PTR_IV_NEXT:%.*]], [[LOOP_LOOP_CRIT_EDGE]] ]
; CHECK-NEXT:    [[MIN_PTR:%.*]] = phi i32* [ [[PTR]], [[ENTRY]] ], [ [[MIN_SELECT:%.*]], [[LOOP_LOOP_CRIT_EDGE]] ]
; CHECK-NEXT:    [[L_1:%.*]] = load i32, i32* [[PTR_IV]], align 4
; CHECK-NEXT:    [[CMP_I_I_I:%.*]] = icmp ult i32 [[L_1]], [[L_2]]
; CHECK-NEXT:    [[TMP0]] = select i1 [[CMP_I_I_I]], i32 [[L_1]], i32 [[L_2]]
; CHECK-NEXT:    [[MIN_SELECT]] = select i1 [[CMP_I_I_I]], i32* [[PTR_IV]], i32* [[MIN_PTR]]
; CHECK-NEXT:    [[PTR_IV_NEXT]] = getelementptr inbounds i32, i32* [[PTR_IV]], i32 [[L_3]]
; CHECK-NEXT:    [[EC:%.*]] = icmp eq i32* [[PTR_IV_NEXT]], [[END:%.*]]
; CHECK-NEXT:    br i1 [[EC]], label [[EXIT:%.*]], label [[LOOP_LOOP_CRIT_EDGE]]
; CHECK:       loop.loop_crit_edge:
; CHECK-NEXT:    [[L_3_PRE]] = load i32, i32* [[MIN_SELECT]], align 4
; CHECK-NEXT:    br label [[LOOP]]
; CHECK:       exit:
; CHECK-NEXT:    [[RES:%.*]] = load i32, i32* [[MIN_SELECT]], align 4
; CHECK-NEXT:    ret i32 [[RES]]
;
entry:
  %start.ptr = getelementptr inbounds i32, i32* %ptr, i64 1
  br label %loop

loop:
  %ptr.iv = phi i32* [ %start.ptr, %entry ], [ %ptr.iv.next, %loop ]
  %min.ptr = phi i32* [ %ptr, %entry ], [ %min.select, %loop ]
  %l.1 = load i32, i32* %ptr.iv, align 4
  %l.2 = load i32, i32* %min.ptr, align 4
  %cmp.i.i.i = icmp ult i32 %l.1, %l.2
  %min.select  = select i1 %cmp.i.i.i, i32* %ptr.iv, i32* %min.ptr
  %l.3 = load i32, i32* %min.ptr, align 4
  %ptr.iv.next = getelementptr inbounds i32, i32* %ptr.iv, i32 %l.3
  %ec = icmp eq i32* %ptr.iv.next, %end
  br i1 %ec, label %exit, label %loop

exit:
  %res = load i32, i32* %min.select, align 4
  ret i32 %res
}

define i32 @test_pointer_phi_used_by_others_in_loop_2(i32* %ptr, i32* %end)  {
; CHECK-LABEL: @test_pointer_phi_used_by_others_in_loop_2(
; CHECK-NEXT:  entry:
; CHECK-NEXT:    [[START_PTR:%.*]] = getelementptr inbounds i32, i32* [[PTR:%.*]], i64 1
; CHECK-NEXT:    [[L_2_PRE:%.*]] = load i32, i32* [[PTR]], align 4
; CHECK-NEXT:    br label [[LOOP:%.*]]
; CHECK:       loop:
; CHECK-NEXT:    [[L_2:%.*]] = phi i32 [ [[L_2_PRE]], [[ENTRY:%.*]] ], [ [[TMP0:%.*]], [[LOOP]] ]
; CHECK-NEXT:    [[PTR_IV:%.*]] = phi i32* [ [[START_PTR]], [[ENTRY]] ], [ [[PTR_IV_NEXT:%.*]], [[LOOP]] ]
; CHECK-NEXT:    [[MIN_PTR:%.*]] = phi i32* [ [[PTR]], [[ENTRY]] ], [ [[MIN_SELECT:%.*]], [[LOOP]] ]
; CHECK-NEXT:    [[L_1:%.*]] = load i32, i32* [[PTR_IV]], align 4
; CHECK-NEXT:    [[CMP_I_I_I:%.*]] = icmp ult i32 [[L_1]], [[L_2]]
; CHECK-NEXT:    [[TMP0]] = select i1 [[CMP_I_I_I]], i32 [[L_1]], i32 [[L_2]]
; CHECK-NEXT:    [[MIN_SELECT]] = select i1 [[CMP_I_I_I]], i32* [[PTR_IV]], i32* [[MIN_PTR]]
; CHECK-NEXT:    [[GEP_MIN_PTR:%.*]] = getelementptr inbounds i32, i32* [[MIN_PTR]], i32 1
; CHECK-NEXT:    [[L_3:%.*]] = load i32, i32* [[GEP_MIN_PTR]], align 4
; CHECK-NEXT:    [[PTR_IV_NEXT]] = getelementptr inbounds i32, i32* [[PTR_IV]], i32 [[L_3]]
; CHECK-NEXT:    [[EC:%.*]] = icmp eq i32* [[PTR_IV_NEXT]], [[END:%.*]]
; CHECK-NEXT:    br i1 [[EC]], label [[EXIT:%.*]], label [[LOOP]]
; CHECK:       exit:
; CHECK-NEXT:    [[RES:%.*]] = load i32, i32* [[MIN_SELECT]], align 4
; CHECK-NEXT:    ret i32 [[RES]]
;
entry:
  %start.ptr = getelementptr inbounds i32, i32* %ptr, i64 1
  br label %loop

loop:
  %ptr.iv = phi i32* [ %start.ptr, %entry ], [ %ptr.iv.next, %loop ]
  %min.ptr = phi i32* [ %ptr, %entry ], [ %min.select, %loop ]
  %l.1 = load i32, i32* %ptr.iv, align 4
  %l.2 = load i32, i32* %min.ptr, align 4
  %cmp.i.i.i = icmp ult i32 %l.1, %l.2
  %min.select  = select i1 %cmp.i.i.i, i32* %ptr.iv, i32* %min.ptr
  %gep.min.ptr = getelementptr inbounds i32, i32* %min.ptr, i32 1
  %l.3 = load i32, i32* %gep.min.ptr, align 4
  %ptr.iv.next = getelementptr inbounds i32, i32* %ptr.iv, i32 %l.3
  %ec = icmp eq i32* %ptr.iv.next, %end
  br i1 %ec, label %exit, label %loop

exit:
  %res = load i32, i32* %min.select, align 4
  ret i32 %res
}

define i32 @test_pointer_phi_select_no_iter_load(i32* %ptr, i32* %end)  {
; CHECK-LABEL: @test_pointer_phi_select_no_iter_load(
; CHECK-NEXT:  entry:
; CHECK-NEXT:    [[START_PTR:%.*]] = getelementptr inbounds i32, i32* [[PTR:%.*]], i64 1
; CHECK-NEXT:    br label [[LOOP:%.*]]
; CHECK:       loop:
; CHECK-NEXT:    [[PTR_IV:%.*]] = phi i32* [ [[START_PTR]], [[ENTRY:%.*]] ], [ [[PTR_IV_NEXT:%.*]], [[LOOP]] ]
; CHECK-NEXT:    [[MIN_PTR:%.*]] = phi i32* [ [[PTR]], [[ENTRY]] ], [ [[MIN_SELECT:%.*]], [[LOOP]] ]
; CHECK-NEXT:    [[L_2:%.*]] = load i32, i32* [[MIN_PTR]], align 4
; CHECK-NEXT:    [[CMP_I_I_I:%.*]] = icmp ult i32 10, [[L_2]]
; CHECK-NEXT:    [[MIN_SELECT]] = select i1 [[CMP_I_I_I]], i32* [[PTR_IV]], i32* [[MIN_PTR]]
; CHECK-NEXT:    [[PTR_IV_NEXT]] = getelementptr inbounds i32, i32* [[PTR_IV]], i64 1
; CHECK-NEXT:    [[EC:%.*]] = icmp eq i32* [[PTR_IV_NEXT]], [[END:%.*]]
; CHECK-NEXT:    br i1 [[EC]], label [[EXIT:%.*]], label [[LOOP]]
; CHECK:       exit:
; CHECK-NEXT:    [[RES:%.*]] = load i32, i32* [[MIN_SELECT]], align 4
; CHECK-NEXT:    ret i32 [[RES]]
;
entry:
  %start.ptr = getelementptr inbounds i32, i32* %ptr, i64 1
  br label %loop

loop:
  %ptr.iv = phi i32* [ %start.ptr, %entry ], [ %ptr.iv.next, %loop ]
  %min.ptr = phi i32* [ %ptr, %entry ], [ %min.select, %loop ]
  %l.2 = load i32, i32* %min.ptr, align 4
  %cmp.i.i.i = icmp ult i32 10, %l.2
  %min.select  = select i1 %cmp.i.i.i, i32* %ptr.iv, i32* %min.ptr
  %ptr.iv.next = getelementptr inbounds i32, i32* %ptr.iv, i64 1
  %ec = icmp eq i32* %ptr.iv.next, %end
  br i1 %ec, label %exit, label %loop

exit:
  %res = load i32, i32* %min.select, align 4
  ret i32 %res
}