test/Transforms/LoopVectorize/single_early_exit_live_outs.ll

; NOTE: Assertions have been autogenerated by utils/update_test_checks.py UTC_ARGS: --version 4
; RUN: opt -S < %s -p loop-vectorize -enable-early-exit-vectorization -force-vector-width=4 | FileCheck %s

declare void @init_mem(ptr, i64);

define i64 @same_exit_block_pre_inc_use1() {
; CHECK-LABEL: define i64 @same_exit_block_pre_inc_use1() {
; CHECK-NEXT:  entry:
; CHECK-NEXT:    [[P1:%.*]] = alloca [1024 x i8], align 1
; CHECK-NEXT:    [[P2:%.*]] = alloca [1024 x i8], align 1
; CHECK-NEXT:    call void @init_mem(ptr [[P1]], i64 1024)
; CHECK-NEXT:    call void @init_mem(ptr [[P2]], i64 1024)
; CHECK-NEXT:    br label [[LAND_RHS:%.*]]
; CHECK:       loop:
; CHECK-NEXT:    [[INDEX:%.*]] = phi i64 [ [[INDEX_NEXT:%.*]], [[FOR_INC:%.*]] ], [ 3, [[ENTRY:%.*]] ]
; CHECK-NEXT:    [[ARRAYIDX:%.*]] = getelementptr inbounds i8, ptr [[P1]], i64 [[INDEX]]
; CHECK-NEXT:    [[TMP38:%.*]] = load i8, ptr [[ARRAYIDX]], align 1
; CHECK-NEXT:    [[ARRAYIDX1:%.*]] = getelementptr inbounds i8, ptr [[P2]], i64 [[INDEX]]
; CHECK-NEXT:    [[TMP39:%.*]] = load i8, ptr [[ARRAYIDX1]], align 1
; CHECK-NEXT:    [[CMP3:%.*]] = icmp eq i8 [[TMP38]], [[TMP39]]
; CHECK-NEXT:    br i1 [[CMP3]], label [[FOR_INC]], label [[FOR_END_LOOPEXIT:%.*]]
; CHECK:       loop.inc:
; CHECK-NEXT:    [[INDEX_NEXT]] = add i64 [[INDEX]], 1
; CHECK-NEXT:    [[EXITCOND:%.*]] = icmp ne i64 [[INDEX_NEXT]], 67
; CHECK-NEXT:    br i1 [[EXITCOND]], label [[LAND_RHS]], label [[FOR_END_LOOPEXIT]]
; CHECK:       loop.end:
; CHECK-NEXT:    [[START_0_LCSSA:%.*]] = phi i64 [ [[INDEX]], [[LAND_RHS]] ], [ 67, [[FOR_INC]] ]
; CHECK-NEXT:    ret i64 [[START_0_LCSSA]]
;
entry:
  %p1 = alloca [1024 x i8]
  %p2 = alloca [1024 x i8]
  call void @init_mem(ptr %p1, i64 1024)
  call void @init_mem(ptr %p2, i64 1024)
  br label %loop

loop:
  %index = phi i64 [ %index.next, %loop.inc ], [ 3, %entry ]
  %arrayidx = getelementptr inbounds i8, ptr %p1, i64 %index
  %ld1 = load i8, ptr %arrayidx, align 1
  %arrayidx1 = getelementptr inbounds i8, ptr %p2, i64 %index
  %ld2 = load i8, ptr %arrayidx1, align 1
  %cmp3 = icmp eq i8 %ld1, %ld2
  br i1 %cmp3, label %loop.inc, label %loop.end

loop.inc:
  %index.next = add i64 %index, 1
  %exitcond = icmp ne i64 %index.next, 67
  br i1 %exitcond, label %loop, label %loop.end

loop.end:
  %retval = phi i64 [ %index, %loop ], [ 67, %loop.inc ]
  ret i64 %retval
}


define i64 @same_exit_block_pre_inc1_use_inv_cond(i1 %cond) {
; CHECK-LABEL: define i64 @same_exit_block_pre_inc1_use_inv_cond(
; CHECK-SAME: i1 [[COND:%.*]]) {
; CHECK-NEXT:  entry:
; CHECK-NEXT:    [[P1:%.*]] = alloca [1024 x i8], align 1
; CHECK-NEXT:    [[P2:%.*]] = alloca [1024 x i8], align 1
; CHECK-NEXT:    call void @init_mem(ptr [[P1]], i64 1024)
; CHECK-NEXT:    call void @init_mem(ptr [[P2]], i64 1024)
; CHECK-NEXT:    br label [[LOOP:%.*]]
; CHECK:       loop:
; CHECK-NEXT:    [[INDEX:%.*]] = phi i64 [ [[INDEX_NEXT:%.*]], [[LOOP_INC:%.*]] ], [ 3, [[ENTRY:%.*]] ]
; CHECK-NEXT:    [[ARRAYIDX:%.*]] = getelementptr inbounds i8, ptr [[P1]], i64 [[INDEX]]
; CHECK-NEXT:    [[LD1:%.*]] = load i8, ptr [[ARRAYIDX]], align 1
; CHECK-NEXT:    [[ARRAYIDX1:%.*]] = getelementptr inbounds i8, ptr [[P2]], i64 [[INDEX]]
; CHECK-NEXT:    [[LD2:%.*]] = load i8, ptr [[ARRAYIDX1]], align 1
; CHECK-NEXT:    [[CMP3:%.*]] = icmp eq i8 [[LD1]], [[LD2]]
; CHECK-NEXT:    [[CMP4:%.*]] = select i1 [[COND]], i1 [[CMP3]], i1 false
; CHECK-NEXT:    br i1 [[CMP4]], label [[LOOP_INC]], label [[LOOP_END:%.*]]
; CHECK:       loop.inc:
; CHECK-NEXT:    [[INDEX_NEXT]] = add i64 [[INDEX]], 1
; CHECK-NEXT:    [[EXITCOND:%.*]] = icmp ne i64 [[INDEX_NEXT]], 67
; CHECK-NEXT:    br i1 [[EXITCOND]], label [[LOOP]], label [[LOOP_END]]
; CHECK:       loop.end:
; CHECK-NEXT:    [[RETVAL:%.*]] = phi i64 [ [[INDEX]], [[LOOP]] ], [ 67, [[LOOP_INC]] ]
; CHECK-NEXT:    ret i64 [[RETVAL]]
;
entry:
  %p1 = alloca [1024 x i8]
  %p2 = alloca [1024 x i8]
  call void @init_mem(ptr %p1, i64 1024)
  call void @init_mem(ptr %p2, i64 1024)
  br label %loop

loop:
  %index = phi i64 [ %index.next, %loop.inc ], [ 3, %entry ]
  %arrayidx = getelementptr inbounds i8, ptr %p1, i64 %index
  %ld1 = load i8, ptr %arrayidx, align 1
  %arrayidx1 = getelementptr inbounds i8, ptr %p2, i64 %index
  %ld2 = load i8, ptr %arrayidx1, align 1
  %cmp3 = icmp eq i8 %ld1, %ld2
  %cmp4 = select i1 %cond, i1 %cmp3, i1 false
  br i1 %cmp4, label %loop.inc, label %loop.end

loop.inc:
  %index.next = add i64 %index, 1
  %exitcond = icmp ne i64 %index.next, 67
  br i1 %exitcond, label %loop, label %loop.end

loop.end:
  %retval = phi i64 [ %index, %loop ], [ 67, %loop.inc ]
  ret i64 %retval
}


define i64 @same_exit_block_pre_inc_use1_gep_two_indices() {
; CHECK-LABEL: define i64 @same_exit_block_pre_inc_use1_gep_two_indices() {
; CHECK-NEXT:  entry:
; CHECK-NEXT:    [[P1:%.*]] = alloca [1024 x i8], align 1
; CHECK-NEXT:    [[P2:%.*]] = alloca [1024 x i8], align 1
; CHECK-NEXT:    call void @init_mem(ptr [[P1]], i64 1024)
; CHECK-NEXT:    call void @init_mem(ptr [[P2]], i64 1024)
; CHECK-NEXT:    br label [[LOOP:%.*]]
; CHECK:       loop:
; CHECK-NEXT:    [[INDEX:%.*]] = phi i64 [ [[INDEX_NEXT:%.*]], [[LOOP_INC:%.*]] ], [ 3, [[ENTRY:%.*]] ]
; CHECK-NEXT:    [[ARRAYIDX:%.*]] = getelementptr inbounds [1024 x i8], ptr [[P1]], i64 0, i64 [[INDEX]]
; CHECK-NEXT:    [[LD1:%.*]] = load i8, ptr [[ARRAYIDX]], align 1
; CHECK-NEXT:    [[ARRAYIDX1:%.*]] = getelementptr inbounds [1024 x i8], ptr [[P2]], i64 0, i64 [[INDEX]]
; CHECK-NEXT:    [[LD2:%.*]] = load i8, ptr [[ARRAYIDX1]], align 1
; CHECK-NEXT:    [[CMP3:%.*]] = icmp eq i8 [[LD1]], [[LD2]]
; CHECK-NEXT:    br i1 [[CMP3]], label [[LOOP_INC]], label [[LOOP_END:%.*]]
; CHECK:       loop.inc:
; CHECK-NEXT:    [[INDEX_NEXT]] = add i64 [[INDEX]], 1
; CHECK-NEXT:    [[EXITCOND:%.*]] = icmp ne i64 [[INDEX_NEXT]], 67
; CHECK-NEXT:    br i1 [[EXITCOND]], label [[LOOP]], label [[LOOP_END]]
; CHECK:       loop.end:
; CHECK-NEXT:    [[RETVAL:%.*]] = phi i64 [ [[INDEX]], [[LOOP]] ], [ 67, [[LOOP_INC]] ]
; CHECK-NEXT:    ret i64 [[RETVAL]]
;
entry:
  %p1 = alloca [1024 x i8]
  %p2 = alloca [1024 x i8]
  call void @init_mem(ptr %p1, i64 1024)
  call void @init_mem(ptr %p2, i64 1024)
  br label %loop

loop:
  %index = phi i64 [ %index.next, %loop.inc ], [ 3, %entry ]
  %arrayidx = getelementptr inbounds [1024 x i8], ptr %p1, i64 0, i64 %index
  %ld1 = load i8, ptr %arrayidx, align 1
  %arrayidx1 = getelementptr inbounds [1024 x i8], ptr %p2, i64 0, i64 %index
  %ld2 = load i8, ptr %arrayidx1, align 1
  %cmp3 = icmp eq i8 %ld1, %ld2
  br i1 %cmp3, label %loop.inc, label %loop.end

loop.inc:
  %index.next = add i64 %index, 1
  %exitcond = icmp ne i64 %index.next, 67
  br i1 %exitcond, label %loop, label %loop.end

loop.end:
  %retval = phi i64 [ %index, %loop ], [ 67, %loop.inc ]
  ret i64 %retval
}


define i64 @same_exit_block_pre_inc_use1_alloca_diff_type() {
; CHECK-LABEL: define i64 @same_exit_block_pre_inc_use1_alloca_diff_type() {
; CHECK-NEXT:  entry:
; CHECK-NEXT:    [[P1:%.*]] = alloca [40 x i32], align 4
; CHECK-NEXT:    [[P2:%.*]] = alloca [40 x i32], align 4
; CHECK-NEXT:    call void @init_mem(ptr [[P1]], i64 1024)
; CHECK-NEXT:    call void @init_mem(ptr [[P2]], i64 1024)
; CHECK-NEXT:    br label [[LAND_RHS:%.*]]
; CHECK:       loop:
; CHECK-NEXT:    [[INDEX:%.*]] = phi i64 [ [[INDEX_NEXT:%.*]], [[FOR_INC:%.*]] ], [ 3, [[ENTRY:%.*]] ]
; CHECK-NEXT:    [[ARRAYIDX:%.*]] = getelementptr inbounds i8, ptr [[P1]], i64 [[INDEX]]
; CHECK-NEXT:    [[TMP38:%.*]] = load i8, ptr [[ARRAYIDX]], align 1
; CHECK-NEXT:    [[ARRAYIDX1:%.*]] = getelementptr inbounds i8, ptr [[P2]], i64 [[INDEX]]
; CHECK-NEXT:    [[TMP39:%.*]] = load i8, ptr [[ARRAYIDX1]], align 1
; CHECK-NEXT:    [[CMP3:%.*]] = icmp eq i8 [[TMP38]], [[TMP39]]
; CHECK-NEXT:    br i1 [[CMP3]], label [[FOR_INC]], label [[FOR_END_LOOPEXIT:%.*]]
; CHECK:       loop.inc:
; CHECK-NEXT:    [[INDEX_NEXT]] = add i64 [[INDEX]], 1
; CHECK-NEXT:    [[EXITCOND:%.*]] = icmp ne i64 [[INDEX_NEXT]], 67
; CHECK-NEXT:    br i1 [[EXITCOND]], label [[LAND_RHS]], label [[FOR_END_LOOPEXIT]]
; CHECK:       loop.end:
; CHECK-NEXT:    [[START_0_LCSSA:%.*]] = phi i64 [ [[INDEX]], [[LAND_RHS]] ], [ 67, [[FOR_INC]] ]
; CHECK-NEXT:    ret i64 [[START_0_LCSSA]]
;
entry:
  %p1 = alloca [40 x i32]
  %p2 = alloca [40 x i32]
  call void @init_mem(ptr %p1, i64 1024)
  call void @init_mem(ptr %p2, i64 1024)
  br label %loop

loop:
  %index = phi i64 [ %index.next, %loop.inc ], [ 3, %entry ]
  %arrayidx = getelementptr inbounds i8, ptr %p1, i64 %index
  %ld1 = load i8, ptr %arrayidx, align 1
  %arrayidx1 = getelementptr inbounds i8, ptr %p2, i64 %index
  %ld2 = load i8, ptr %arrayidx1, align 1
  %cmp3 = icmp eq i8 %ld1, %ld2
  br i1 %cmp3, label %loop.inc, label %loop.end

loop.inc:
  %index.next = add i64 %index, 1
  %exitcond = icmp ne i64 %index.next, 67
  br i1 %exitcond, label %loop, label %loop.end

loop.end:
  %retval = phi i64 [ %index, %loop ], [ 67, %loop.inc ]
  ret i64 %retval
}


define i64 @same_exit_block_pre_inc_use2() {
; CHECK-LABEL: define i64 @same_exit_block_pre_inc_use2() {
; CHECK-NEXT:  entry:
; CHECK-NEXT:    [[P1:%.*]] = alloca [1024 x i8], align 1
; CHECK-NEXT:    [[P2:%.*]] = alloca [1024 x i8], align 1
; CHECK-NEXT:    call void @init_mem(ptr [[P1]], i64 1024)
; CHECK-NEXT:    call void @init_mem(ptr [[P2]], i64 1024)
; CHECK-NEXT:    br label [[LOOP:%.*]]
; CHECK:       loop:
; CHECK-NEXT:    [[INDEX:%.*]] = phi i64 [ [[INDEX_NEXT:%.*]], [[LOOP_INC:%.*]] ], [ 3, [[ENTRY:%.*]] ]
; CHECK-NEXT:    [[ARRAYIDX:%.*]] = getelementptr inbounds i8, ptr [[P1]], i64 [[INDEX]]
; CHECK-NEXT:    [[LD1:%.*]] = load i8, ptr [[ARRAYIDX]], align 1
; CHECK-NEXT:    [[ARRAYIDX1:%.*]] = getelementptr inbounds i8, ptr [[P2]], i64 [[INDEX]]
; CHECK-NEXT:    [[LD2:%.*]] = load i8, ptr [[ARRAYIDX1]], align 1
; CHECK-NEXT:    [[CMP3:%.*]] = icmp eq i8 [[LD1]], [[LD2]]
; CHECK-NEXT:    br i1 [[CMP3]], label [[LOOP_INC]], label [[LOOP_END:%.*]]
; CHECK:       loop.inc:
; CHECK-NEXT:    [[INDEX_NEXT]] = add i64 [[INDEX]], 1
; CHECK-NEXT:    [[EXITCOND:%.*]] = icmp ne i64 [[INDEX_NEXT]], 67
; CHECK-NEXT:    br i1 [[EXITCOND]], label [[LOOP]], label [[LOOP_END]]
; CHECK:       loop.end:
; CHECK-NEXT:    [[RETVAL:%.*]] = phi i64 [ 67, [[LOOP]] ], [ [[INDEX]], [[LOOP_INC]] ]
; CHECK-NEXT:    ret i64 [[RETVAL]]
;
entry:
  %p1 = alloca [1024 x i8]
  %p2 = alloca [1024 x i8]
  call void @init_mem(ptr %p1, i64 1024)
  call void @init_mem(ptr %p2, i64 1024)
  br label %loop

loop:
  %index = phi i64 [ %index.next, %loop.inc ], [ 3, %entry ]
  %arrayidx = getelementptr inbounds i8, ptr %p1, i64 %index
  %ld1 = load i8, ptr %arrayidx, align 1
  %arrayidx1 = getelementptr inbounds i8, ptr %p2, i64 %index
  %ld2 = load i8, ptr %arrayidx1, align 1
  %cmp3 = icmp eq i8 %ld1, %ld2
  br i1 %cmp3, label %loop.inc, label %loop.end

loop.inc:
  %index.next = add i64 %index, 1
  %exitcond = icmp ne i64 %index.next, 67
  br i1 %exitcond, label %loop, label %loop.end

loop.end:
  %retval = phi i64 [ 67, %loop ], [ %index, %loop.inc ]
  ret i64 %retval
}


define i64 @same_exit_block_pre_inc_use3() {
; CHECK-LABEL: define i64 @same_exit_block_pre_inc_use3() {
; CHECK-NEXT:  entry:
; CHECK-NEXT:    [[P1:%.*]] = alloca [1024 x i8], align 1
; CHECK-NEXT:    [[P2:%.*]] = alloca [1024 x i8], align 1
; CHECK-NEXT:    call void @init_mem(ptr [[P1]], i64 1024)
; CHECK-NEXT:    call void @init_mem(ptr [[P2]], i64 1024)
; CHECK-NEXT:    br label [[LOOP:%.*]]
; CHECK:       loop:
; CHECK-NEXT:    [[INDEX:%.*]] = phi i64 [ [[INDEX_NEXT:%.*]], [[LOOP_INC:%.*]] ], [ 3, [[ENTRY:%.*]] ]
; CHECK-NEXT:    [[ARRAYIDX:%.*]] = getelementptr inbounds i8, ptr [[P1]], i64 [[INDEX]]
; CHECK-NEXT:    [[LD1:%.*]] = load i8, ptr [[ARRAYIDX]], align 1
; CHECK-NEXT:    [[ARRAYIDX1:%.*]] = getelementptr inbounds i8, ptr [[P2]], i64 [[INDEX]]
; CHECK-NEXT:    [[LD2:%.*]] = load i8, ptr [[ARRAYIDX1]], align 1
; CHECK-NEXT:    [[CMP3:%.*]] = icmp eq i8 [[LD1]], [[LD2]]
; CHECK-NEXT:    br i1 [[CMP3]], label [[LOOP_INC]], label [[LOOP_END:%.*]]
; CHECK:       loop.inc:
; CHECK-NEXT:    [[INDEX_NEXT]] = add i64 [[INDEX]], 1
; CHECK-NEXT:    [[EXITCOND:%.*]] = icmp ne i64 [[INDEX_NEXT]], 67
; CHECK-NEXT:    br i1 [[EXITCOND]], label [[LOOP]], label [[LOOP_END]]
; CHECK:       loop.end:
; CHECK-NEXT:    [[INDEX_LCSSA:%.*]] = phi i64 [ [[INDEX]], [[LOOP_INC]] ], [ [[INDEX]], [[LOOP]] ]
; CHECK-NEXT:    ret i64 [[INDEX_LCSSA]]
;
entry:
  %p1 = alloca [1024 x i8]
  %p2 = alloca [1024 x i8]
  call void @init_mem(ptr %p1, i64 1024)
  call void @init_mem(ptr %p2, i64 1024)
  br label %loop

loop:
  %index = phi i64 [ %index.next, %loop.inc ], [ 3, %entry ]
  %arrayidx = getelementptr inbounds i8, ptr %p1, i64 %index
  %ld1 = load i8, ptr %arrayidx, align 1
  %arrayidx1 = getelementptr inbounds i8, ptr %p2, i64 %index
  %ld2 = load i8, ptr %arrayidx1, align 1
  %cmp3 = icmp eq i8 %ld1, %ld2
  br i1 %cmp3, label %loop.inc, label %loop.end

loop.inc:
  %index.next = add i64 %index, 1
  %exitcond = icmp ne i64 %index.next, 67
  br i1 %exitcond, label %loop, label %loop.end

loop.end:
  ret i64 %index
}


; In this example the early exit block appears in the list of ExitNotTaken
; SCEVs, but is not computable.
define i64 @same_exit_block_pre_inc_use4() {
; CHECK-LABEL: define i64 @same_exit_block_pre_inc_use4() {
; CHECK-NEXT:  entry:
; CHECK-NEXT:    [[P1:%.*]] = alloca [1024 x i64], align 8
; CHECK-NEXT:    [[P2:%.*]] = alloca [1024 x i64], align 8
; CHECK-NEXT:    call void @init_mem(ptr [[P1]], i64 1024)
; CHECK-NEXT:    call void @init_mem(ptr [[P2]], i64 1024)
; CHECK-NEXT:    br label [[LOOP:%.*]]
; CHECK:       loop:
; CHECK-NEXT:    [[INDEX:%.*]] = phi i64 [ [[INDEX_NEXT:%.*]], [[LOOP_INC:%.*]] ], [ 3, [[ENTRY:%.*]] ]
; CHECK-NEXT:    [[ARRAYIDX:%.*]] = getelementptr inbounds i64, ptr [[P1]], i64 [[INDEX]]
; CHECK-NEXT:    [[LD1:%.*]] = load i64, ptr [[ARRAYIDX]], align 1
; CHECK-NEXT:    [[CMP3:%.*]] = icmp ult i64 [[INDEX]], [[LD1]]
; CHECK-NEXT:    br i1 [[CMP3]], label [[LOOP_INC]], label [[LOOP_END:%.*]]
; CHECK:       loop.inc:
; CHECK-NEXT:    [[INDEX_NEXT]] = add i64 [[INDEX]], 1
; CHECK-NEXT:    [[EXITCOND:%.*]] = icmp ne i64 [[INDEX_NEXT]], 67
; CHECK-NEXT:    br i1 [[EXITCOND]], label [[LOOP]], label [[LOOP_END]]
; CHECK:       loop.end:
; CHECK-NEXT:    [[RETVAL:%.*]] = phi i64 [ [[INDEX]], [[LOOP]] ], [ 67, [[LOOP_INC]] ]
; CHECK-NEXT:    ret i64 [[RETVAL]]
;
entry:
  %p1 = alloca [1024 x i64]
  %p2 = alloca [1024 x i64]
  call void @init_mem(ptr %p1, i64 1024)
  call void @init_mem(ptr %p2, i64 1024)
  br label %loop

loop:
  %index = phi i64 [ %index.next, %loop.inc ], [ 3, %entry ]
  %arrayidx = getelementptr inbounds i64, ptr %p1, i64 %index
  %ld1 = load i64, ptr %arrayidx, align 1
  %cmp3 = icmp ult i64 %index, %ld1
  br i1 %cmp3, label %loop.inc, label %loop.end

loop.inc:
  %index.next = add i64 %index, 1
  %exitcond = icmp ne i64 %index.next, 67
  br i1 %exitcond, label %loop, label %loop.end

loop.end:
  %retval = phi i64 [ %index, %loop ], [ 67, %loop.inc ]
  ret i64 %retval
}


define i64 @same_exit_block_post_inc_use() {
; CHECK-LABEL: define i64 @same_exit_block_post_inc_use() {
; CHECK-NEXT:  entry:
; CHECK-NEXT:    [[P1:%.*]] = alloca [1024 x i8], align 1
; CHECK-NEXT:    [[P2:%.*]] = alloca [1024 x i8], align 1
; CHECK-NEXT:    call void @init_mem(ptr [[P1]], i64 1024)
; CHECK-NEXT:    call void @init_mem(ptr [[P2]], i64 1024)
; CHECK-NEXT:    br label [[LOOP:%.*]]
; CHECK:       loop:
; CHECK-NEXT:    [[INDEX:%.*]] = phi i64 [ [[INDEX_NEXT:%.*]], [[LOOP_INC:%.*]] ], [ 3, [[ENTRY:%.*]] ]
; CHECK-NEXT:    [[ARRAYIDX:%.*]] = getelementptr inbounds i8, ptr [[P1]], i64 [[INDEX]]
; CHECK-NEXT:    [[LD1:%.*]] = load i8, ptr [[ARRAYIDX]], align 1
; CHECK-NEXT:    [[ARRAYIDX1:%.*]] = getelementptr inbounds i8, ptr [[P2]], i64 [[INDEX]]
; CHECK-NEXT:    [[LD2:%.*]] = load i8, ptr [[ARRAYIDX1]], align 1
; CHECK-NEXT:    [[CMP3:%.*]] = icmp eq i8 [[LD1]], [[LD2]]
; CHECK-NEXT:    br i1 [[CMP3]], label [[LOOP_INC]], label [[LOOP_END:%.*]]
; CHECK:       loop.inc:
; CHECK-NEXT:    [[INDEX_NEXT]] = add i64 [[INDEX]], 1
; CHECK-NEXT:    [[EXITCOND:%.*]] = icmp ne i64 [[INDEX_NEXT]], 67
; CHECK-NEXT:    br i1 [[EXITCOND]], label [[LOOP]], label [[LOOP_END]]
; CHECK:       loop.end:
; CHECK-NEXT:    [[RETVAL:%.*]] = phi i64 [ [[INDEX]], [[LOOP]] ], [ [[INDEX_NEXT]], [[LOOP_INC]] ]
; CHECK-NEXT:    ret i64 [[RETVAL]]
;
entry:
  %p1 = alloca [1024 x i8]
  %p2 = alloca [1024 x i8]
  call void @init_mem(ptr %p1, i64 1024)
  call void @init_mem(ptr %p2, i64 1024)
  br label %loop

loop:
  %index = phi i64 [ %index.next, %loop.inc ], [ 3, %entry ]
  %arrayidx = getelementptr inbounds i8, ptr %p1, i64 %index
  %ld1 = load i8, ptr %arrayidx, align 1
  %arrayidx1 = getelementptr inbounds i8, ptr %p2, i64 %index
  %ld2 = load i8, ptr %arrayidx1, align 1
  %cmp3 = icmp eq i8 %ld1, %ld2
  br i1 %cmp3, label %loop.inc, label %loop.end

loop.inc:
  %index.next = add i64 %index, 1
  %exitcond = icmp ne i64 %index.next, 67
  br i1 %exitcond, label %loop, label %loop.end

loop.end:
  %retval = phi i64 [ %index, %loop ], [ %index.next, %loop.inc ]
  ret i64 %retval
}


define i64 @same_exit_block_post_inc_use2() {
; CHECK-LABEL: define i64 @same_exit_block_post_inc_use2() {
; CHECK-NEXT:  entry:
; CHECK-NEXT:    [[P1:%.*]] = alloca [1024 x i8], align 1
; CHECK-NEXT:    [[P2:%.*]] = alloca [1024 x i8], align 1
; CHECK-NEXT:    call void @init_mem(ptr [[P1]], i64 1024)
; CHECK-NEXT:    call void @init_mem(ptr [[P2]], i64 1024)
; CHECK-NEXT:    br label [[LOOP:%.*]]
; CHECK:       loop:
; CHECK-NEXT:    [[INDEX:%.*]] = phi i64 [ [[INDEX_NEXT:%.*]], [[LOOP_INC:%.*]] ], [ 3, [[ENTRY:%.*]] ]
; CHECK-NEXT:    [[ARRAYIDX:%.*]] = getelementptr inbounds i8, ptr [[P1]], i64 [[INDEX]]
; CHECK-NEXT:    [[LD1:%.*]] = load i8, ptr [[ARRAYIDX]], align 1
; CHECK-NEXT:    [[ARRAYIDX1:%.*]] = getelementptr inbounds i8, ptr [[P2]], i64 [[INDEX]]
; CHECK-NEXT:    [[LD2:%.*]] = load i8, ptr [[ARRAYIDX1]], align 1
; CHECK-NEXT:    [[INDEX_NEXT]] = add i64 [[INDEX]], 1
; CHECK-NEXT:    [[CMP3:%.*]] = icmp eq i8 [[LD1]], [[LD2]]
; CHECK-NEXT:    br i1 [[CMP3]], label [[LOOP_INC]], label [[LOOP_END:%.*]]
; CHECK:       loop.inc:
; CHECK-NEXT:    [[EXITCOND:%.*]] = icmp ne i64 [[INDEX_NEXT]], 67
; CHECK-NEXT:    br i1 [[EXITCOND]], label [[LOOP]], label [[LOOP_END]]
; CHECK:       loop.end:
; CHECK-NEXT:    [[RETVAL:%.*]] = phi i64 [ [[INDEX_NEXT]], [[LOOP]] ], [ [[INDEX]], [[LOOP_INC]] ]
; CHECK-NEXT:    ret i64 [[RETVAL]]
;
entry:
  %p1 = alloca [1024 x i8]
  %p2 = alloca [1024 x i8]
  call void @init_mem(ptr %p1, i64 1024)
  call void @init_mem(ptr %p2, i64 1024)
  br label %loop

loop:
  %index = phi i64 [ %index.next, %loop.inc ], [ 3, %entry ]
  %arrayidx = getelementptr inbounds i8, ptr %p1, i64 %index
  %ld1 = load i8, ptr %arrayidx, align 1
  %arrayidx1 = getelementptr inbounds i8, ptr %p2, i64 %index
  %ld2 = load i8, ptr %arrayidx1, align 1
  %index.next = add i64 %index, 1
  %cmp3 = icmp eq i8 %ld1, %ld2
  br i1 %cmp3, label %loop.inc, label %loop.end

loop.inc:
  %exitcond = icmp ne i64 %index.next, 67
  br i1 %exitcond, label %loop, label %loop.end

loop.end:
  %retval = phi i64 [ %index.next, %loop ], [ %index, %loop.inc ]
  ret i64 %retval
}


define i64 @diff_exit_block_pre_inc_use1() {
; CHECK-LABEL: define i64 @diff_exit_block_pre_inc_use1() {
; CHECK-NEXT:  entry:
; CHECK-NEXT:    [[P1:%.*]] = alloca [1024 x i8], align 1
; CHECK-NEXT:    [[P2:%.*]] = alloca [1024 x i8], align 1
; CHECK-NEXT:    call void @init_mem(ptr [[P1]], i64 1024)
; CHECK-NEXT:    call void @init_mem(ptr [[P2]], i64 1024)
; CHECK-NEXT:    br label [[LOOP:%.*]]
; CHECK:       loop:
; CHECK-NEXT:    [[INDEX:%.*]] = phi i64 [ [[INDEX_NEXT:%.*]], [[LOOP_INC:%.*]] ], [ 3, [[ENTRY:%.*]] ]
; CHECK-NEXT:    [[ARRAYIDX:%.*]] = getelementptr inbounds i8, ptr [[P1]], i64 [[INDEX]]
; CHECK-NEXT:    [[LD1:%.*]] = load i8, ptr [[ARRAYIDX]], align 1
; CHECK-NEXT:    [[ARRAYIDX1:%.*]] = getelementptr inbounds i8, ptr [[P2]], i64 [[INDEX]]
; CHECK-NEXT:    [[LD2:%.*]] = load i8, ptr [[ARRAYIDX1]], align 1
; CHECK-NEXT:    [[CMP3:%.*]] = icmp eq i8 [[LD1]], [[LD2]]
; CHECK-NEXT:    br i1 [[CMP3]], label [[LOOP_INC]], label [[LOOP_EARLY_EXIT:%.*]]
; CHECK:       loop.inc:
; CHECK-NEXT:    [[INDEX_NEXT]] = add i64 [[INDEX]], 1
; CHECK-NEXT:    [[EXITCOND:%.*]] = icmp ne i64 [[INDEX_NEXT]], 67
; CHECK-NEXT:    br i1 [[EXITCOND]], label [[LOOP]], label [[LOOP_END:%.*]]
; CHECK:       loop.early.exit:
; CHECK-NEXT:    [[RETVAL1:%.*]] = phi i64 [ [[INDEX]], [[LOOP]] ]
; CHECK-NEXT:    ret i64 [[RETVAL1]]
; CHECK:       loop.end:
; CHECK-NEXT:    [[RETVAL2:%.*]] = phi i64 [ 67, [[LOOP_INC]] ]
; CHECK-NEXT:    ret i64 [[RETVAL2]]
;
entry:
  %p1 = alloca [1024 x i8]
  %p2 = alloca [1024 x i8]
  call void @init_mem(ptr %p1, i64 1024)
  call void @init_mem(ptr %p2, i64 1024)
  br label %loop

loop:
  %index = phi i64 [ %index.next, %loop.inc ], [ 3, %entry ]
  %arrayidx = getelementptr inbounds i8, ptr %p1, i64 %index
  %ld1 = load i8, ptr %arrayidx, align 1
  %arrayidx1 = getelementptr inbounds i8, ptr %p2, i64 %index
  %ld2 = load i8, ptr %arrayidx1, align 1
  %cmp3 = icmp eq i8 %ld1, %ld2
  br i1 %cmp3, label %loop.inc, label %loop.early.exit

loop.inc:
  %index.next = add i64 %index, 1
  %exitcond = icmp ne i64 %index.next, 67
  br i1 %exitcond, label %loop, label %loop.end

loop.early.exit:
  %retval1 = phi i64 [ %index, %loop ]
  ret i64 %retval1

loop.end:
  %retval2 = phi i64 [ 67, %loop.inc ]
  ret i64 %retval2
}


define i64 @diff_exit_block_pre_inc_use2() {
; CHECK-LABEL: define i64 @diff_exit_block_pre_inc_use2() {
; CHECK-NEXT:  entry:
; CHECK-NEXT:    [[P1:%.*]] = alloca [1024 x i8], align 1
; CHECK-NEXT:    [[P2:%.*]] = alloca [1024 x i8], align 1
; CHECK-NEXT:    call void @init_mem(ptr [[P1]], i64 1024)
; CHECK-NEXT:    call void @init_mem(ptr [[P2]], i64 1024)
; CHECK-NEXT:    br i1 false, label [[SCALAR_PH:%.*]], label [[VECTOR_PH:%.*]]
; CHECK:       vector.ph:
; CHECK-NEXT:    br label [[LOOP:%.*]]
; CHECK:       vector.body:
; CHECK-NEXT:    [[INDEX1:%.*]] = phi i64 [ 0, [[VECTOR_PH]] ], [ [[INDEX_NEXT3:%.*]], [[LOOP]] ]
; CHECK-NEXT:    [[VEC_IND:%.*]] = phi <4 x i64> [ <i64 3, i64 4, i64 5, i64 6>, [[VECTOR_PH]] ], [ [[VEC_IND_NEXT:%.*]], [[LOOP]] ]
; CHECK-NEXT:    [[OFFSET_IDX:%.*]] = add i64 3, [[INDEX1]]
; CHECK-NEXT:    [[TMP0:%.*]] = add i64 [[OFFSET_IDX]], 0
; CHECK-NEXT:    [[TMP1:%.*]] = getelementptr inbounds i8, ptr [[P1]], i64 [[TMP0]]
; CHECK-NEXT:    [[TMP2:%.*]] = getelementptr inbounds i8, ptr [[TMP1]], i32 0
; CHECK-NEXT:    [[WIDE_LOAD:%.*]] = load <4 x i8>, ptr [[TMP2]], align 1
; CHECK-NEXT:    [[TMP3:%.*]] = getelementptr inbounds i8, ptr [[P2]], i64 [[TMP0]]
; CHECK-NEXT:    [[TMP4:%.*]] = getelementptr inbounds i8, ptr [[TMP3]], i32 0
; CHECK-NEXT:    [[WIDE_LOAD2:%.*]] = load <4 x i8>, ptr [[TMP4]], align 1
; CHECK-NEXT:    [[TMP5:%.*]] = icmp eq <4 x i8> [[WIDE_LOAD]], [[WIDE_LOAD2]]
; CHECK-NEXT:    [[INDEX_NEXT3]] = add nuw i64 [[INDEX1]], 4
; CHECK-NEXT:    [[TMP6:%.*]] = xor <4 x i1> [[TMP5]], splat (i1 true)
; CHECK-NEXT:    [[TMP7:%.*]] = call i1 @llvm.vector.reduce.or.v4i1(<4 x i1> [[TMP6]])
; CHECK-NEXT:    [[TMP8:%.*]] = icmp eq i64 [[INDEX_NEXT3]], 64
; CHECK-NEXT:    [[VEC_IND_NEXT]] = add <4 x i64> [[VEC_IND]], splat (i64 4)
; CHECK-NEXT:    [[TMP9:%.*]] = or i1 [[TMP7]], [[TMP8]]
; CHECK-NEXT:    br i1 [[TMP9]], label [[MIDDLE_SPLIT:%.*]], label [[LOOP]], !llvm.loop [[LOOP0:![0-9]+]]
; CHECK:       middle.split:
; CHECK-NEXT:    br i1 [[TMP7]], label [[LOOP_EARLY_EXIT:%.*]], label [[MIDDLE_BLOCK:%.*]]
; CHECK:       middle.block:
; CHECK-NEXT:    [[TMP10:%.*]] = extractelement <4 x i64> [[VEC_IND]], i32 3
; CHECK-NEXT:    br i1 true, label [[LOOP_END:%.*]], label [[SCALAR_PH]]
; CHECK:       scalar.ph:
; CHECK-NEXT:    [[BC_RESUME_VAL:%.*]] = phi i64 [ 67, [[MIDDLE_BLOCK]] ], [ 3, [[ENTRY:%.*]] ]
; CHECK-NEXT:    br label [[LOOP1:%.*]]
; CHECK:       loop:
; CHECK-NEXT:    [[INDEX:%.*]] = phi i64 [ [[INDEX_NEXT:%.*]], [[LOOP_INC:%.*]] ], [ [[BC_RESUME_VAL]], [[SCALAR_PH]] ]
; CHECK-NEXT:    [[ARRAYIDX:%.*]] = getelementptr inbounds i8, ptr [[P1]], i64 [[INDEX]]
; CHECK-NEXT:    [[LD1:%.*]] = load i8, ptr [[ARRAYIDX]], align 1
; CHECK-NEXT:    [[ARRAYIDX1:%.*]] = getelementptr inbounds i8, ptr [[P2]], i64 [[INDEX]]
; CHECK-NEXT:    [[LD2:%.*]] = load i8, ptr [[ARRAYIDX1]], align 1
; CHECK-NEXT:    [[CMP3:%.*]] = icmp eq i8 [[LD1]], [[LD2]]
; CHECK-NEXT:    br i1 [[CMP3]], label [[LOOP_INC]], label [[LOOP_EARLY_EXIT]]
; CHECK:       loop.inc:
; CHECK-NEXT:    [[INDEX_NEXT]] = add i64 [[INDEX]], 1
; CHECK-NEXT:    [[EXITCOND:%.*]] = icmp ne i64 [[INDEX_NEXT]], 67
; CHECK-NEXT:    br i1 [[EXITCOND]], label [[LOOP1]], label [[LOOP_END]], !llvm.loop [[LOOP3:![0-9]+]]
; CHECK:       loop.early.exit:
; CHECK-NEXT:    [[RETVAL1:%.*]] = phi i64 [ 67, [[LOOP1]] ], [ 67, [[MIDDLE_SPLIT]] ]
; CHECK-NEXT:    ret i64 [[RETVAL1]]
; CHECK:       loop.end:
; CHECK-NEXT:    [[RETVAL2:%.*]] = phi i64 [ [[INDEX]], [[LOOP_INC]] ], [ [[TMP10]], [[MIDDLE_BLOCK]] ]
; CHECK-NEXT:    ret i64 [[RETVAL2]]
;
entry:
  %p1 = alloca [1024 x i8]
  %p2 = alloca [1024 x i8]
  call void @init_mem(ptr %p1, i64 1024)
  call void @init_mem(ptr %p2, i64 1024)
  br label %loop

loop:
  %index = phi i64 [ %index.next, %loop.inc ], [ 3, %entry ]
  %arrayidx = getelementptr inbounds i8, ptr %p1, i64 %index
  %ld1 = load i8, ptr %arrayidx, align 1
  %arrayidx1 = getelementptr inbounds i8, ptr %p2, i64 %index
  %ld2 = load i8, ptr %arrayidx1, align 1
  %cmp3 = icmp eq i8 %ld1, %ld2
  br i1 %cmp3, label %loop.inc, label %loop.early.exit

loop.inc:
  %index.next = add i64 %index, 1
  %exitcond = icmp ne i64 %index.next, 67
  br i1 %exitcond, label %loop, label %loop.end

loop.early.exit:
  %retval1 = phi i64 [ 67, %loop ]
  ret i64 %retval1

loop.end:
  %retval2 = phi i64 [ %index, %loop.inc ]
  ret i64 %retval2
}


define i64 @diff_exit_block_pre_inc_use3() {
; CHECK-LABEL: define i64 @diff_exit_block_pre_inc_use3() {
; CHECK-NEXT:  entry:
; CHECK-NEXT:    [[P1:%.*]] = alloca [1024 x i8], align 1
; CHECK-NEXT:    [[P2:%.*]] = alloca [1024 x i8], align 1
; CHECK-NEXT:    call void @init_mem(ptr [[P1]], i64 1024)
; CHECK-NEXT:    call void @init_mem(ptr [[P2]], i64 1024)
; CHECK-NEXT:    br label [[LOOP:%.*]]
; CHECK:       loop:
; CHECK-NEXT:    [[INDEX:%.*]] = phi i64 [ [[INDEX_NEXT:%.*]], [[LOOP_INC:%.*]] ], [ 3, [[ENTRY:%.*]] ]
; CHECK-NEXT:    [[ARRAYIDX:%.*]] = getelementptr inbounds i8, ptr [[P1]], i64 [[INDEX]]
; CHECK-NEXT:    [[LD1:%.*]] = load i8, ptr [[ARRAYIDX]], align 1
; CHECK-NEXT:    [[ARRAYIDX1:%.*]] = getelementptr inbounds i8, ptr [[P2]], i64 [[INDEX]]
; CHECK-NEXT:    [[LD2:%.*]] = load i8, ptr [[ARRAYIDX1]], align 1
; CHECK-NEXT:    [[CMP3:%.*]] = icmp eq i8 [[LD1]], [[LD2]]
; CHECK-NEXT:    br i1 [[CMP3]], label [[LOOP_INC]], label [[LOOP_EARLY_EXIT:%.*]]
; CHECK:       loop.inc:
; CHECK-NEXT:    [[INDEX_NEXT]] = add i64 [[INDEX]], 1
; CHECK-NEXT:    [[EXITCOND:%.*]] = icmp ne i64 [[INDEX_NEXT]], 67
; CHECK-NEXT:    br i1 [[EXITCOND]], label [[LOOP]], label [[LOOP_END:%.*]]
; CHECK:       loop.early.exit:
; CHECK-NEXT:    [[INDEX_LCSSA:%.*]] = phi i64 [ [[INDEX]], [[LOOP]] ]
; CHECK-NEXT:    ret i64 [[INDEX_LCSSA]]
; CHECK:       loop.end:
; CHECK-NEXT:    [[INDEX_LCSSA1:%.*]] = phi i64 [ [[INDEX]], [[LOOP_INC]] ]
; CHECK-NEXT:    ret i64 [[INDEX_LCSSA1]]
;
entry:
  %p1 = alloca [1024 x i8]
  %p2 = alloca [1024 x i8]
  call void @init_mem(ptr %p1, i64 1024)
  call void @init_mem(ptr %p2, i64 1024)
  br label %loop

loop:
  %index = phi i64 [ %index.next, %loop.inc ], [ 3, %entry ]
  %arrayidx = getelementptr inbounds i8, ptr %p1, i64 %index
  %ld1 = load i8, ptr %arrayidx, align 1
  %arrayidx1 = getelementptr inbounds i8, ptr %p2, i64 %index
  %ld2 = load i8, ptr %arrayidx1, align 1
  %cmp3 = icmp eq i8 %ld1, %ld2
  br i1 %cmp3, label %loop.inc, label %loop.early.exit

loop.inc:
  %index.next = add i64 %index, 1
  %exitcond = icmp ne i64 %index.next, 67
  br i1 %exitcond, label %loop, label %loop.end

loop.early.exit:
  ret i64 %index

loop.end:
  ret i64 %index
}


define i64 @diff_exit_block_post_inc_use1() {
; CHECK-LABEL: define i64 @diff_exit_block_post_inc_use1() {
; CHECK-NEXT:  entry:
; CHECK-NEXT:    [[P1:%.*]] = alloca [1024 x i8], align 1
; CHECK-NEXT:    [[P2:%.*]] = alloca [1024 x i8], align 1
; CHECK-NEXT:    call void @init_mem(ptr [[P1]], i64 1024)
; CHECK-NEXT:    call void @init_mem(ptr [[P2]], i64 1024)
; CHECK-NEXT:    br label [[LOOP:%.*]]
; CHECK:       loop:
; CHECK-NEXT:    [[INDEX:%.*]] = phi i64 [ [[INDEX_NEXT:%.*]], [[LOOP_INC:%.*]] ], [ 3, [[ENTRY:%.*]] ]
; CHECK-NEXT:    [[ARRAYIDX:%.*]] = getelementptr inbounds i8, ptr [[P1]], i64 [[INDEX]]
; CHECK-NEXT:    [[LD1:%.*]] = load i8, ptr [[ARRAYIDX]], align 1
; CHECK-NEXT:    [[ARRAYIDX1:%.*]] = getelementptr inbounds i8, ptr [[P2]], i64 [[INDEX]]
; CHECK-NEXT:    [[LD2:%.*]] = load i8, ptr [[ARRAYIDX1]], align 1
; CHECK-NEXT:    [[CMP3:%.*]] = icmp eq i8 [[LD1]], [[LD2]]
; CHECK-NEXT:    br i1 [[CMP3]], label [[LOOP_INC]], label [[LOOP_EARLY_EXIT:%.*]]
; CHECK:       loop.inc:
; CHECK-NEXT:    [[INDEX_NEXT]] = add i64 [[INDEX]], 1
; CHECK-NEXT:    [[EXITCOND:%.*]] = icmp ne i64 [[INDEX_NEXT]], 67
; CHECK-NEXT:    br i1 [[EXITCOND]], label [[LOOP]], label [[LOOP_END:%.*]]
; CHECK:       loop.early.exit:
; CHECK-NEXT:    [[RETVAL1:%.*]] = phi i64 [ [[INDEX]], [[LOOP]] ]
; CHECK-NEXT:    ret i64 [[RETVAL1]]
; CHECK:       loop.end:
; CHECK-NEXT:    [[RETVAL2:%.*]] = phi i64 [ [[INDEX_NEXT]], [[LOOP_INC]] ]
; CHECK-NEXT:    ret i64 [[RETVAL2]]
;
entry:
  %p1 = alloca [1024 x i8]
  %p2 = alloca [1024 x i8]
  call void @init_mem(ptr %p1, i64 1024)
  call void @init_mem(ptr %p2, i64 1024)
  br label %loop

loop:
  %index = phi i64 [ %index.next, %loop.inc ], [ 3, %entry ]
  %arrayidx = getelementptr inbounds i8, ptr %p1, i64 %index
  %ld1 = load i8, ptr %arrayidx, align 1
  %arrayidx1 = getelementptr inbounds i8, ptr %p2, i64 %index
  %ld2 = load i8, ptr %arrayidx1, align 1
  %cmp3 = icmp eq i8 %ld1, %ld2
  br i1 %cmp3, label %loop.inc, label %loop.early.exit

loop.inc:
  %index.next = add i64 %index, 1
  %exitcond = icmp ne i64 %index.next, 67
  br i1 %exitcond, label %loop, label %loop.end

loop.early.exit:
  %retval1 = phi i64 [ %index, %loop ]
  ret i64 %retval1

loop.end:
  %retval2 = phi i64 [ %index.next, %loop.inc ]
  ret i64 %retval2
}


define i64 @diff_exit_block_post_inc_use2() {
; CHECK-LABEL: define i64 @diff_exit_block_post_inc_use2() {
; CHECK-NEXT:  entry:
; CHECK-NEXT:    [[P1:%.*]] = alloca [1024 x i8], align 1
; CHECK-NEXT:    [[P2:%.*]] = alloca [1024 x i8], align 1
; CHECK-NEXT:    call void @init_mem(ptr [[P1]], i64 1024)
; CHECK-NEXT:    call void @init_mem(ptr [[P2]], i64 1024)
; CHECK-NEXT:    br label [[LOOP:%.*]]
; CHECK:       loop:
; CHECK-NEXT:    [[INDEX:%.*]] = phi i64 [ [[INDEX_NEXT:%.*]], [[LOOP_INC:%.*]] ], [ 3, [[ENTRY:%.*]] ]
; CHECK-NEXT:    [[INDEX_NEXT]] = add i64 [[INDEX]], 1
; CHECK-NEXT:    [[ARRAYIDX:%.*]] = getelementptr inbounds i8, ptr [[P1]], i64 [[INDEX]]
; CHECK-NEXT:    [[LD1:%.*]] = load i8, ptr [[ARRAYIDX]], align 1
; CHECK-NEXT:    [[ARRAYIDX1:%.*]] = getelementptr inbounds i8, ptr [[P2]], i64 [[INDEX]]
; CHECK-NEXT:    [[LD2:%.*]] = load i8, ptr [[ARRAYIDX1]], align 1
; CHECK-NEXT:    [[CMP3:%.*]] = icmp eq i8 [[LD1]], [[LD2]]
; CHECK-NEXT:    br i1 [[CMP3]], label [[LOOP_INC]], label [[LOOP_EARLY_EXIT:%.*]]
; CHECK:       loop.inc:
; CHECK-NEXT:    [[EXITCOND:%.*]] = icmp ne i64 [[INDEX_NEXT]], 67
; CHECK-NEXT:    br i1 [[EXITCOND]], label [[LOOP]], label [[LOOP_END:%.*]]
; CHECK:       loop.early.exit:
; CHECK-NEXT:    [[RETVAL1:%.*]] = phi i64 [ [[INDEX_NEXT]], [[LOOP]] ]
; CHECK-NEXT:    ret i64 [[RETVAL1]]
; CHECK:       loop.end:
; CHECK-NEXT:    [[RETVAL2:%.*]] = phi i64 [ [[INDEX]], [[LOOP_INC]] ]
; CHECK-NEXT:    ret i64 [[RETVAL2]]
;
entry:
  %p1 = alloca [1024 x i8]
  %p2 = alloca [1024 x i8]
  call void @init_mem(ptr %p1, i64 1024)
  call void @init_mem(ptr %p2, i64 1024)
  br label %loop

loop:
  %index = phi i64 [ %index.next, %loop.inc ], [ 3, %entry ]
  %index.next = add i64 %index, 1
  %arrayidx = getelementptr inbounds i8, ptr %p1, i64 %index
  %ld1 = load i8, ptr %arrayidx, align 1
  %arrayidx1 = getelementptr inbounds i8, ptr %p2, i64 %index
  %ld2 = load i8, ptr %arrayidx1, align 1
  %cmp3 = icmp eq i8 %ld1, %ld2
  br i1 %cmp3, label %loop.inc, label %loop.early.exit

loop.inc:
  %exitcond = icmp ne i64 %index.next, 67
  br i1 %exitcond, label %loop, label %loop.end

loop.early.exit:
  %retval1 = phi i64 [ %index.next, %loop ]
  ret i64 %retval1

loop.end:
  %retval2 = phi i64 [ %index, %loop.inc ]
  ret i64 %retval2
}


define i64 @loop_contains_safe_call() {
; CHECK-LABEL: define i64 @loop_contains_safe_call() {
; CHECK-NEXT:  entry:
; CHECK-NEXT:    [[P1:%.*]] = alloca [1024 x i8], align 1
; CHECK-NEXT:    [[P2:%.*]] = alloca [1024 x i8], align 1
; CHECK-NEXT:    call void @init_mem(ptr [[P1]], i64 1024)
; CHECK-NEXT:    call void @init_mem(ptr [[P2]], i64 1024)
; CHECK-NEXT:    br label [[LOOP:%.*]]
; CHECK:       loop:
; CHECK-NEXT:    [[INDEX:%.*]] = phi i64 [ [[INDEX_NEXT:%.*]], [[LOOP_INC:%.*]] ], [ 3, [[ENTRY:%.*]] ]
; CHECK-NEXT:    [[ARRAYIDX:%.*]] = getelementptr inbounds float, ptr [[P1]], i64 [[INDEX]]
; CHECK-NEXT:    [[LD1:%.*]] = load float, ptr [[ARRAYIDX]], align 1
; CHECK-NEXT:    [[SQRT:%.*]] = tail call fast float @llvm.sqrt.f32(float [[LD1]])
; CHECK-NEXT:    [[CMP:%.*]] = fcmp fast ult float [[SQRT]], 3.000000e+00
; CHECK-NEXT:    br i1 [[CMP]], label [[LOOP_INC]], label [[LOOP_END:%.*]]
; CHECK:       loop.inc:
; CHECK-NEXT:    [[INDEX_NEXT]] = add i64 [[INDEX]], 1
; CHECK-NEXT:    [[EXITCOND:%.*]] = icmp ne i64 [[INDEX_NEXT]], 67
; CHECK-NEXT:    br i1 [[EXITCOND]], label [[LOOP]], label [[LOOP_END]]
; CHECK:       loop.end:
; CHECK-NEXT:    [[RETVAL:%.*]] = phi i64 [ [[INDEX]], [[LOOP]] ], [ 67, [[LOOP_INC]] ]
; CHECK-NEXT:    ret i64 [[RETVAL]]
;
entry:
  %p1 = alloca [1024 x i8]
  %p2 = alloca [1024 x i8]
  call void @init_mem(ptr %p1, i64 1024)
  call void @init_mem(ptr %p2, i64 1024)
  br label %loop

loop:
  %index = phi i64 [ %index.next, %loop.inc ], [ 3, %entry ]
  %arrayidx = getelementptr inbounds float, ptr %p1, i64 %index
  %ld1 = load float, ptr %arrayidx, align 1
  %sqrt = tail call fast float @llvm.sqrt.f32(float %ld1)
  %cmp = fcmp fast ult float %sqrt, 3.0e+00
  br i1 %cmp, label %loop.inc, label %loop.end

loop.inc:
  %index.next = add i64 %index, 1
  %exitcond = icmp ne i64 %index.next, 67
  br i1 %exitcond, label %loop, label %loop.end

loop.end:
  %retval = phi i64 [ %index, %loop ], [ 67, %loop.inc ]
  ret i64 %retval
}


define i64 @loop_contains_safe_div() {
; CHECK-LABEL: define i64 @loop_contains_safe_div() {
; CHECK-NEXT:  entry:
; CHECK-NEXT:    [[P1:%.*]] = alloca [1024 x i8], align 1
; CHECK-NEXT:    [[P2:%.*]] = alloca [1024 x i8], align 1
; CHECK-NEXT:    call void @init_mem(ptr [[P1]], i64 1024)
; CHECK-NEXT:    call void @init_mem(ptr [[P2]], i64 1024)
; CHECK-NEXT:    br label [[LOOP1:%.*]]
; CHECK:       loop:
; CHECK-NEXT:    [[INDEX2:%.*]] = phi i64 [ [[INDEX_NEXT1:%.*]], [[LOOP_INC1:%.*]] ], [ 3, [[ENTRY:%.*]] ]
; CHECK-NEXT:    [[ARRAYIDX:%.*]] = getelementptr inbounds i32, ptr [[P1]], i64 [[INDEX2]]
; CHECK-NEXT:    [[LD1:%.*]] = load i32, ptr [[ARRAYIDX]], align 1
; CHECK-NEXT:    [[DIV:%.*]] = udiv i32 [[LD1]], 20000
; CHECK-NEXT:    [[CMP:%.*]] = icmp eq i32 [[DIV]], 1
; CHECK-NEXT:    br i1 [[CMP]], label [[LOOP_INC1]], label [[LOOP_END:%.*]]
; CHECK:       loop.inc:
; CHECK-NEXT:    [[INDEX_NEXT1]] = add i64 [[INDEX2]], 1
; CHECK-NEXT:    [[EXITCOND:%.*]] = icmp ne i64 [[INDEX_NEXT1]], 67
; CHECK-NEXT:    br i1 [[EXITCOND]], label [[LOOP1]], label [[LOOP_END]]
; CHECK:       loop.end:
; CHECK-NEXT:    [[RETVAL:%.*]] = phi i64 [ [[INDEX2]], [[LOOP1]] ], [ 67, [[LOOP_INC1]] ]
; CHECK-NEXT:    ret i64 [[RETVAL]]
;
entry:
  %p1 = alloca [1024 x i8]
  %p2 = alloca [1024 x i8]
  call void @init_mem(ptr %p1, i64 1024)
  call void @init_mem(ptr %p2, i64 1024)
  br label %loop

loop:
  %index = phi i64 [ %index.next, %loop.inc ], [ 3, %entry ]
  %arrayidx = getelementptr inbounds i32, ptr %p1, i64 %index
  %ld1 = load i32, ptr %arrayidx, align 1
  %div = udiv i32 %ld1, 20000
  %cmp = icmp eq i32 %div, 1
  br i1 %cmp, label %loop.inc, label %loop.end

loop.inc:
  %index.next = add i64 %index, 1
  %exitcond = icmp ne i64 %index.next, 67
  br i1 %exitcond, label %loop, label %loop.end

loop.end:
  %retval = phi i64 [ %index, %loop ], [ 67, %loop.inc ]
  ret i64 %retval
}


define i64 @loop_contains_load_after_early_exit(ptr dereferenceable(1024) align(8) %p2) {
; CHECK-LABEL: define i64 @loop_contains_load_after_early_exit(
; CHECK-SAME: ptr align 8 dereferenceable(1024) [[P2:%.*]]) {
; CHECK-NEXT:  entry:
; CHECK-NEXT:    [[P1:%.*]] = alloca [1024 x i8], align 1
; CHECK-NEXT:    call void @init_mem(ptr [[P1]], i64 1024)
; CHECK-NEXT:    br label [[LOOP:%.*]]
; CHECK:       loop:
; CHECK-NEXT:    [[INDEX:%.*]] = phi i64 [ [[INDEX_NEXT:%.*]], [[LOOP_INC:%.*]] ], [ 3, [[ENTRY:%.*]] ]
; CHECK-NEXT:    [[ARRAYIDX:%.*]] = getelementptr inbounds i32, ptr [[P1]], i64 [[INDEX]]
; CHECK-NEXT:    [[LD1:%.*]] = load i32, ptr [[ARRAYIDX]], align 1
; CHECK-NEXT:    [[CMP:%.*]] = icmp eq i32 [[LD1]], 1
; CHECK-NEXT:    br i1 [[CMP]], label [[LOOP_INC]], label [[LOOP_END:%.*]]
; CHECK:       loop.inc:
; CHECK-NEXT:    [[ARRAYIDX2:%.*]] = getelementptr inbounds i64, ptr [[P2]], i64 [[INDEX]]
; CHECK-NEXT:    [[LD2:%.*]] = load i64, ptr [[ARRAYIDX2]], align 8
; CHECK-NEXT:    [[INDEX_NEXT]] = add i64 [[INDEX]], 1
; CHECK-NEXT:    [[EXITCOND:%.*]] = icmp ne i64 [[INDEX_NEXT]], 67
; CHECK-NEXT:    br i1 [[EXITCOND]], label [[LOOP]], label [[LOOP_END]]
; CHECK:       loop.end:
; CHECK-NEXT:    [[RETVAL:%.*]] = phi i64 [ [[INDEX]], [[LOOP]] ], [ [[LD2]], [[LOOP_INC]] ]
; CHECK-NEXT:    ret i64 [[RETVAL]]
;
entry:
  %p1 = alloca [1024 x i8]
  call void @init_mem(ptr %p1, i64 1024)
  br label %loop

loop:
  %index = phi i64 [ %index.next, %loop.inc ], [ 3, %entry ]
  %arrayidx = getelementptr inbounds i32, ptr %p1, i64 %index
  %ld1 = load i32, ptr %arrayidx, align 1
  %cmp = icmp eq i32 %ld1, 1
  br i1 %cmp, label %loop.inc, label %loop.end

loop.inc:
  %arrayidx2 = getelementptr inbounds i64, ptr %p2, i64 %index
  %ld2 = load i64, ptr %arrayidx2, align 8
  %index.next = add i64 %index, 1
  %exitcond = icmp ne i64 %index.next, 67
  br i1 %exitcond, label %loop, label %loop.end

loop.end:
  %retval = phi i64 [ %index, %loop ], [ %ld2, %loop.inc ]
  ret i64 %retval
}


define i64 @same_exit_block_pre_inc_use1_reverse() {
; CHECK-LABEL: define i64 @same_exit_block_pre_inc_use1_reverse() {
; CHECK-NEXT:  entry:
; CHECK-NEXT:    [[P1:%.*]] = alloca [1024 x i8], align 1
; CHECK-NEXT:    [[P2:%.*]] = alloca [1024 x i8], align 1
; CHECK-NEXT:    call void @init_mem(ptr [[P1]], i64 1024)
; CHECK-NEXT:    call void @init_mem(ptr [[P2]], i64 1024)
; CHECK-NEXT:    br label [[LOOP:%.*]]
; CHECK:       loop:
; CHECK-NEXT:    [[INDEX:%.*]] = phi i64 [ [[INDEX_NEXT:%.*]], [[LOOP_INC:%.*]] ], [ 1023, [[ENTRY:%.*]] ]
; CHECK-NEXT:    [[ARRAYIDX:%.*]] = getelementptr inbounds i8, ptr [[P1]], i64 [[INDEX]]
; CHECK-NEXT:    [[LD1:%.*]] = load i8, ptr [[ARRAYIDX]], align 1
; CHECK-NEXT:    [[ARRAYIDX1:%.*]] = getelementptr inbounds i8, ptr [[P2]], i64 [[INDEX]]
; CHECK-NEXT:    [[LD2:%.*]] = load i8, ptr [[ARRAYIDX1]], align 1
; CHECK-NEXT:    [[CMP3:%.*]] = icmp eq i8 [[LD1]], [[LD2]]
; CHECK-NEXT:    br i1 [[CMP3]], label [[LOOP_INC]], label [[LOOP_END:%.*]]
; CHECK:       loop.inc:
; CHECK-NEXT:    [[INDEX_NEXT]] = add i64 [[INDEX]], -1
; CHECK-NEXT:    [[EXITCOND:%.*]] = icmp eq i64 [[INDEX_NEXT]], 0
; CHECK-NEXT:    br i1 [[EXITCOND]], label [[LOOP_END]], label [[LOOP]]
; CHECK:       loop.end:
; CHECK-NEXT:    [[RETVAL:%.*]] = phi i64 [ [[INDEX]], [[LOOP]] ], [ 1024, [[LOOP_INC]] ]
; CHECK-NEXT:    ret i64 [[RETVAL]]
;
entry:
  %p1 = alloca [1024 x i8]
  %p2 = alloca [1024 x i8]
  call void @init_mem(ptr %p1, i64 1024)
  call void @init_mem(ptr %p2, i64 1024)
  br label %loop

loop:
  %index = phi i64 [ %index.next, %loop.inc ], [ 1023, %entry ]
  %arrayidx = getelementptr inbounds i8, ptr %p1, i64 %index
  %ld1 = load i8, ptr %arrayidx, align 1
  %arrayidx1 = getelementptr inbounds i8, ptr %p2, i64 %index
  %ld2 = load i8, ptr %arrayidx1, align 1
  %cmp3 = icmp eq i8 %ld1, %ld2
  br i1 %cmp3, label %loop.inc, label %loop.end

loop.inc:
  %index.next = add i64 %index, -1
  %exitcond = icmp eq i64 %index.next, 0
  br i1 %exitcond, label %loop.end, label %loop

loop.end:
  %retval = phi i64 [ %index, %loop ], [ 1024, %loop.inc ]
  ret i64 %retval
}


define i64 @same_exit_block_pre_inc_use1_deref_ptrs(ptr dereferenceable(1024) %p1, ptr dereferenceable(1024) %p2) {
; CHECK-LABEL: define i64 @same_exit_block_pre_inc_use1_deref_ptrs(
; CHECK-SAME: ptr dereferenceable(1024) [[P1:%.*]], ptr dereferenceable(1024) [[P2:%.*]]) {
; CHECK-NEXT:  entry:
; CHECK-NEXT:    br label [[LOOP:%.*]]
; CHECK:       loop:
; CHECK-NEXT:    [[INDEX:%.*]] = phi i64 [ [[INDEX_NEXT:%.*]], [[LOOP_INC:%.*]] ], [ 3, [[ENTRY:%.*]] ]
; CHECK-NEXT:    [[ARRAYIDX:%.*]] = getelementptr inbounds i8, ptr [[P1]], i64 [[INDEX]]
; CHECK-NEXT:    [[LD1:%.*]] = load i8, ptr [[ARRAYIDX]], align 1
; CHECK-NEXT:    [[ARRAYIDX1:%.*]] = getelementptr inbounds i8, ptr [[P2]], i64 [[INDEX]]
; CHECK-NEXT:    [[LD2:%.*]] = load i8, ptr [[ARRAYIDX1]], align 1
; CHECK-NEXT:    [[CMP3:%.*]] = icmp eq i8 [[LD1]], [[LD2]]
; CHECK-NEXT:    br i1 [[CMP3]], label [[LOOP_INC]], label [[LOOP_END:%.*]]
; CHECK:       loop.inc:
; CHECK-NEXT:    [[INDEX_NEXT]] = add i64 [[INDEX]], 1
; CHECK-NEXT:    [[EXITCOND:%.*]] = icmp ne i64 [[INDEX_NEXT]], 67
; CHECK-NEXT:    br i1 [[EXITCOND]], label [[LOOP]], label [[LOOP_END]]
; CHECK:       loop.end:
; CHECK-NEXT:    [[RETVAL:%.*]] = phi i64 [ [[INDEX]], [[LOOP]] ], [ 67, [[LOOP_INC]] ]
; CHECK-NEXT:    ret i64 [[RETVAL]]
;
entry:
  br label %loop

loop:
  %index = phi i64 [ %index.next, %loop.inc ], [ 3, %entry ]
  %arrayidx = getelementptr inbounds i8, ptr %p1, i64 %index
  %ld1 = load i8, ptr %arrayidx, align 1
  %arrayidx1 = getelementptr inbounds i8, ptr %p2, i64 %index
  %ld2 = load i8, ptr %arrayidx1, align 1
  %cmp3 = icmp eq i8 %ld1, %ld2
  br i1 %cmp3, label %loop.inc, label %loop.end

loop.inc:
  %index.next = add i64 %index, 1
  %exitcond = icmp ne i64 %index.next, 67
  br i1 %exitcond, label %loop, label %loop.end

loop.end:
  %retval = phi i64 [ %index, %loop ], [ 67, %loop.inc ]
  ret i64 %retval
}


declare i32 @foo(i32) readonly
declare <vscale x 4 x i32> @foo_vec(<vscale x 4 x i32>)

attributes #0 = { "vector-function-abi-variant"="_ZGVsNxv_foo(foo_vec)" }
;.
; CHECK: [[LOOP0]] = distinct !{[[LOOP0]], [[META1:![0-9]+]], [[META2:![0-9]+]]}
; CHECK: [[META1]] = !{!"llvm.loop.isvectorized", i32 1}
; CHECK: [[META2]] = !{!"llvm.loop.unroll.runtime.disable"}
; CHECK: [[LOOP3]] = distinct !{[[LOOP3]], [[META2]], [[META1]]}
;.