reference, declarationdefinition
definition → references, declarations, derived classes, virtual overrides
reference to multiple definitions → definitions
unreferenced
    1
    2
    3
    4
    5
    6
    7
    8
    9
   10
   11
   12
   13
   14
   15
   16
   17
   18
   19
   20
   21
   22
   23
   24
   25
   26
   27
   28
   29
   30
   31
   32
   33
   34
   35
   36
   37
   38
   39
   40
   41
   42
   43
   44
   45
   46
   47
   48
   49
   50
   51
   52
   53
   54
   55
   56
   57
   58
   59
   60
   61
   62
   63
   64
   65
   66
   67
   68
   69
   70
   71
   72
   73
   74
   75
   76
   77
   78
   79
   80
   81
   82
   83
   84
   85
   86
   87
   88
   89
   90
   91
   92
   93
   94
   95
   96
   97
   98
   99
  100
  101
  102
  103
  104
  105
  106
  107
  108
  109
  110
  111
  112
  113
  114
  115
  116
  117
  118
  119
  120
  121
  122
  123
  124
  125
  126
  127
  128
  129
  130
  131
  132
  133
  134
  135
  136
  137
  138
  139
  140
  141
  142
  143
  144
  145
  146
  147
  148
  149
  150
  151
  152
  153
  154
  155
  156
  157
  158
  159
  160
  161
  162
  163
  164
  165
  166
  167
  168
  169
  170
  171
  172
  173
  174
  175
  176
  177
  178
  179
  180
  181
  182
  183
  184
  185
  186
  187
  188
  189
  190
  191
  192
  193
  194
  195
  196
  197
  198
  199
  200
  201
  202
  203
  204
  205
  206
  207
  208
  209
  210
  211
  212
  213
  214
  215
  216
  217
  218
  219
  220
  221
  222
  223
  224
  225
  226
  227
  228
  229
  230
  231
  232
  233
  234
  235
  236
  237
  238
  239
  240
  241
  242
  243
  244
  245
  246
  247
  248
  249
  250
  251
  252
  253
  254
  255
  256
  257
  258
  259
  260
  261
  262
  263
  264
  265
  266
  267
  268
  269
  270
  271
  272
  273
  274
  275
  276
  277
  278
  279
  280
  281
  282
  283
  284
  285
  286
  287
  288
  289
  290
  291
  292
  293
  294
  295
  296
  297
  298
  299
  300
  301
  302
  303
  304
  305
  306
  307
  308
  309
  310
  311
  312
  313
  314
  315
  316
  317
  318
  319
  320
  321
  322
  323
  324
  325
  326
  327
  328
  329
  330
  331
  332
  333
  334
  335
  336
  337
  338
  339
  340
  341
  342
  343
  344
  345
  346
  347
  348
  349
  350
  351
  352
  353
  354
  355
  356
  357
  358
  359
  360
  361
  362
  363
  364
  365
  366
  367
  368
  369
  370
  371
  372
  373
  374
  375
  376
  377
  378
  379
  380
  381
  382
  383
; NOTE: Assertions have been autogenerated by utils/update_llc_test_checks.py
; RUN: llc -mtriple=amdgcn-amd-amdhsa -mcpu=gfx900 -verify-machineinstrs < %s | FileCheck -check-prefixes=GCN,GFX900 %s

define <2 x half> @chain_hi_to_lo_private() {
; GCN-LABEL: chain_hi_to_lo_private:
; GCN:       ; %bb.0: ; %bb
; GCN-NEXT:    s_waitcnt vmcnt(0) expcnt(0) lgkmcnt(0)
; GCN-NEXT:    buffer_load_ushort v0, off, s[0:3], s33 offset:2
; GCN-NEXT:    s_waitcnt vmcnt(0)
; GCN-NEXT:    buffer_load_short_d16_hi v0, off, s[0:3], s33
; GCN-NEXT:    s_waitcnt vmcnt(0)
; GCN-NEXT:    s_setpc_b64 s[30:31]
bb:
  %gep_lo = getelementptr inbounds half, half addrspace(5)* null, i64 1
  %load_lo = load half, half addrspace(5)* %gep_lo
  %gep_hi = getelementptr inbounds half, half addrspace(5)* null, i64 0
  %load_hi = load half, half addrspace(5)* %gep_hi

  %temp = insertelement <2 x half> undef, half %load_lo, i32 0
  %result = insertelement <2 x half> %temp, half %load_hi, i32 1

  ret <2 x half> %result
}

define <2 x half> @chain_hi_to_lo_private_different_bases(half addrspace(5)* %base_lo, half addrspace(5)* %base_hi) {
; GCN-LABEL: chain_hi_to_lo_private_different_bases:
; GCN:       ; %bb.0: ; %bb
; GCN-NEXT:    s_waitcnt vmcnt(0) expcnt(0) lgkmcnt(0)
; GCN-NEXT:    buffer_load_ushort v0, v0, s[0:3], s33 offen
; GCN-NEXT:    s_waitcnt vmcnt(0)
; GCN-NEXT:    buffer_load_short_d16_hi v0, v1, s[0:3], s33 offen
; GCN-NEXT:    s_waitcnt vmcnt(0)
; GCN-NEXT:    s_setpc_b64 s[30:31]
bb:
  %load_lo = load half, half addrspace(5)* %base_lo
  %load_hi = load half, half addrspace(5)* %base_hi

  %temp = insertelement <2 x half> undef, half %load_lo, i32 0
  %result = insertelement <2 x half> %temp, half %load_hi, i32 1

  ret <2 x half> %result
}

define <2 x half> @chain_hi_to_lo_arithmatic(half addrspace(5)* %base, half %in) {
; GCN-LABEL: chain_hi_to_lo_arithmatic:
; GCN:       ; %bb.0: ; %bb
; GCN-NEXT:    s_waitcnt vmcnt(0) expcnt(0) lgkmcnt(0)
; GCN-NEXT:    v_add_f16_e32 v1, 1.0, v1
; GCN-NEXT:    buffer_load_short_d16_hi v1, v0, s[0:3], s33 offen
; GCN-NEXT:    s_waitcnt vmcnt(0)
; GCN-NEXT:    v_mov_b32_e32 v0, v1
; GCN-NEXT:    s_setpc_b64 s[30:31]
bb:
  %arith_lo = fadd half %in, 1.0
  %load_hi = load half, half addrspace(5)* %base

  %temp = insertelement <2 x half> undef, half %arith_lo, i32 0
  %result = insertelement <2 x half> %temp, half %load_hi, i32 1

  ret <2 x half> %result
}

define <2 x half> @chain_hi_to_lo_group() {
; GCN-LABEL: chain_hi_to_lo_group:
; GCN:       ; %bb.0: ; %bb
; GCN-NEXT:    s_waitcnt vmcnt(0) expcnt(0) lgkmcnt(0)
; GCN-NEXT:    v_mov_b32_e32 v1, 0
; GCN-NEXT:    ds_read_u16 v0, v1 offset:2
; GCN-NEXT:    s_waitcnt lgkmcnt(0)
; GCN-NEXT:    ds_read_u16_d16_hi v0, v1
; GCN-NEXT:    s_waitcnt lgkmcnt(0)
; GCN-NEXT:    s_setpc_b64 s[30:31]
bb:
  %gep_lo = getelementptr inbounds half, half addrspace(3)* null, i64 1
  %load_lo = load half, half addrspace(3)* %gep_lo
  %gep_hi = getelementptr inbounds half, half addrspace(3)* null, i64 0
  %load_hi = load half, half addrspace(3)* %gep_hi

  %temp = insertelement <2 x half> undef, half %load_lo, i32 0
  %result = insertelement <2 x half> %temp, half %load_hi, i32 1

  ret <2 x half> %result
}

define <2 x half> @chain_hi_to_lo_group_different_bases(half addrspace(3)* %base_lo, half addrspace(3)* %base_hi) {
; GCN-LABEL: chain_hi_to_lo_group_different_bases:
; GCN:       ; %bb.0: ; %bb
; GCN-NEXT:    s_waitcnt vmcnt(0) expcnt(0) lgkmcnt(0)
; GCN-NEXT:    ds_read_u16 v0, v0
; GCN-NEXT:    s_waitcnt lgkmcnt(0)
; GCN-NEXT:    ds_read_u16_d16_hi v0, v1
; GCN-NEXT:    s_waitcnt lgkmcnt(0)
; GCN-NEXT:    s_setpc_b64 s[30:31]
bb:
  %load_lo = load half, half addrspace(3)* %base_lo
  %load_hi = load half, half addrspace(3)* %base_hi

  %temp = insertelement <2 x half> undef, half %load_lo, i32 0
  %result = insertelement <2 x half> %temp, half %load_hi, i32 1

  ret <2 x half> %result
}

define <2 x half> @chain_hi_to_lo_global() {
; GCN-LABEL: chain_hi_to_lo_global:
; GCN:       ; %bb.0: ; %bb
; GCN-NEXT:    s_waitcnt vmcnt(0) expcnt(0) lgkmcnt(0)
; GCN-NEXT:    v_mov_b32_e32 v0, 2
; GCN-NEXT:    v_mov_b32_e32 v1, 0
; GCN-NEXT:    global_load_ushort v0, v[0:1], off
; GCN-NEXT:    v_mov_b32_e32 v1, 0
; GCN-NEXT:    v_mov_b32_e32 v2, 0
; GCN-NEXT:    s_waitcnt vmcnt(0)
; GCN-NEXT:    global_load_short_d16_hi v0, v[1:2], off
; GCN-NEXT:    s_waitcnt vmcnt(0)
; GCN-NEXT:    s_setpc_b64 s[30:31]
bb:
  %gep_lo = getelementptr inbounds half, half addrspace(1)* null, i64 1
  %load_lo = load half, half addrspace(1)* %gep_lo
  %gep_hi = getelementptr inbounds half, half addrspace(1)* null, i64 0
  %load_hi = load half, half addrspace(1)* %gep_hi

  %temp = insertelement <2 x half> undef, half %load_lo, i32 0
  %result = insertelement <2 x half> %temp, half %load_hi, i32 1

  ret <2 x half> %result
}

define <2 x half> @chain_hi_to_lo_global_different_bases(half addrspace(1)* %base_lo, half addrspace(1)* %base_hi) {
; GCN-LABEL: chain_hi_to_lo_global_different_bases:
; GCN:       ; %bb.0: ; %bb
; GCN-NEXT:    s_waitcnt vmcnt(0) expcnt(0) lgkmcnt(0)
; GCN-NEXT:    global_load_ushort v0, v[0:1], off
; GCN-NEXT:    s_waitcnt vmcnt(0)
; GCN-NEXT:    global_load_short_d16_hi v0, v[2:3], off
; GCN-NEXT:    s_waitcnt vmcnt(0)
; GCN-NEXT:    s_setpc_b64 s[30:31]
bb:
  %load_lo = load half, half addrspace(1)* %base_lo
  %load_hi = load half, half addrspace(1)* %base_hi

  %temp = insertelement <2 x half> undef, half %load_lo, i32 0
  %result = insertelement <2 x half> %temp, half %load_hi, i32 1

  ret <2 x half> %result
}

define <2 x half> @chain_hi_to_lo_flat() {
; GCN-LABEL: chain_hi_to_lo_flat:
; GCN:       ; %bb.0: ; %bb
; GCN-NEXT:    s_waitcnt vmcnt(0) expcnt(0) lgkmcnt(0)
; GCN-NEXT:    v_mov_b32_e32 v0, 2
; GCN-NEXT:    v_mov_b32_e32 v1, 0
; GCN-NEXT:    flat_load_ushort v0, v[0:1]
; GCN-NEXT:    v_mov_b32_e32 v1, 0
; GCN-NEXT:    v_mov_b32_e32 v2, 0
; GCN-NEXT:    s_waitcnt vmcnt(0) lgkmcnt(0)
; GCN-NEXT:    flat_load_short_d16_hi v0, v[1:2]
; GCN-NEXT:    s_waitcnt vmcnt(0) lgkmcnt(0)
; GCN-NEXT:    s_setpc_b64 s[30:31]
bb:
  %gep_lo = getelementptr inbounds half, half* null, i64 1
  %load_lo = load half, half* %gep_lo
  %gep_hi = getelementptr inbounds half, half* null, i64 0
  %load_hi = load half, half* %gep_hi

  %temp = insertelement <2 x half> undef, half %load_lo, i32 0
  %result = insertelement <2 x half> %temp, half %load_hi, i32 1

  ret <2 x half> %result
}

define <2 x half> @chain_hi_to_lo_flat_different_bases(half* %base_lo, half* %base_hi) {
; GCN-LABEL: chain_hi_to_lo_flat_different_bases:
; GCN:       ; %bb.0: ; %bb
; GCN-NEXT:    s_waitcnt vmcnt(0) expcnt(0) lgkmcnt(0)
; GCN-NEXT:    flat_load_ushort v0, v[0:1]
; GCN-NEXT:    s_waitcnt vmcnt(0) lgkmcnt(0)
; GCN-NEXT:    flat_load_short_d16_hi v0, v[2:3]
; GCN-NEXT:    s_waitcnt vmcnt(0) lgkmcnt(0)
; GCN-NEXT:    s_setpc_b64 s[30:31]
bb:
  %load_lo = load half, half* %base_lo
  %load_hi = load half, half* %base_hi

  %temp = insertelement <2 x half> undef, half %load_lo, i32 0
  %result = insertelement <2 x half> %temp, half %load_hi, i32 1

  ret <2 x half> %result
}

; Make sure we don't lose any of the private stores.
define amdgpu_kernel void @vload2_private(i16 addrspace(1)* nocapture readonly %in, <2 x i16> addrspace(1)* nocapture %out) #0 {
; GCN-LABEL: vload2_private:
; GCN:       ; %bb.0: ; %entry
; GCN-NEXT:    s_add_u32 flat_scratch_lo, s6, s9
; GCN-NEXT:    s_addc_u32 flat_scratch_hi, s7, 0
; GCN-NEXT:    s_load_dwordx4 s[4:7], s[4:5], 0x0
; GCN-NEXT:    s_waitcnt lgkmcnt(0)
; GCN-NEXT:    v_mov_b32_e32 v2, s4
; GCN-NEXT:    v_mov_b32_e32 v3, s5
; GCN-NEXT:    global_load_dword v4, v[2:3], off
; GCN-NEXT:    global_load_ushort v2, v[2:3], off offset:4
; GCN-NEXT:    v_mov_b32_e32 v0, s6
; GCN-NEXT:    v_mov_b32_e32 v1, s7
; GCN-NEXT:    s_waitcnt vmcnt(1)
; GCN-NEXT:    buffer_store_short v4, off, s[0:3], s9 offset:4
; GCN-NEXT:    buffer_store_short_d16_hi v4, off, s[0:3], s9 offset:6
; GCN-NEXT:    s_waitcnt vmcnt(2)
; GCN-NEXT:    buffer_store_short v2, off, s[0:3], s9 offset:8
; GCN-NEXT:    buffer_load_ushort v2, off, s[0:3], s9 offset:4
; GCN-NEXT:    buffer_load_ushort v4, off, s[0:3], s9 offset:6
; GCN-NEXT:    s_waitcnt vmcnt(1)
; GCN-NEXT:    v_and_b32_e32 v2, 0xffff, v2
; GCN-NEXT:    s_waitcnt vmcnt(0)
; GCN-NEXT:    v_mov_b32_e32 v3, v4
; GCN-NEXT:    buffer_load_short_d16_hi v3, off, s[0:3], s9 offset:8
; GCN-NEXT:    v_lshl_or_b32 v2, v4, 16, v2
; GCN-NEXT:    s_waitcnt vmcnt(0)
; GCN-NEXT:    global_store_dwordx2 v[0:1], v[2:3], off
; GCN-NEXT:    s_endpgm
entry:
  %loc = alloca [3 x i16], align 2, addrspace(5)
  %loc.0.sroa_cast1 = bitcast [3 x i16] addrspace(5)* %loc to i8 addrspace(5)*
  %tmp = load i16, i16 addrspace(1)* %in, align 2
  %loc.0.sroa_idx = getelementptr inbounds [3 x i16], [3 x i16] addrspace(5)* %loc, i32 0, i32 0
  store volatile i16 %tmp, i16 addrspace(5)* %loc.0.sroa_idx
  %arrayidx.1 = getelementptr inbounds i16, i16 addrspace(1)* %in, i64 1
  %tmp1 = load i16, i16 addrspace(1)* %arrayidx.1, align 2
  %loc.2.sroa_idx3 = getelementptr inbounds [3 x i16], [3 x i16] addrspace(5)* %loc, i32 0, i32 1
  store volatile i16 %tmp1, i16 addrspace(5)* %loc.2.sroa_idx3
  %arrayidx.2 = getelementptr inbounds i16, i16 addrspace(1)* %in, i64 2
  %tmp2 = load i16, i16 addrspace(1)* %arrayidx.2, align 2
  %loc.4.sroa_idx = getelementptr inbounds [3 x i16], [3 x i16] addrspace(5)* %loc, i32 0, i32 2
  store volatile i16 %tmp2, i16 addrspace(5)* %loc.4.sroa_idx
  %loc.0.sroa_cast = bitcast [3 x i16] addrspace(5)* %loc to <2 x i16> addrspace(5)*
  %loc.0. = load <2 x i16>, <2 x i16> addrspace(5)* %loc.0.sroa_cast, align 2
  store <2 x i16> %loc.0., <2 x i16> addrspace(1)* %out, align 4
  %loc.2.sroa_idx = getelementptr inbounds [3 x i16], [3 x i16] addrspace(5)* %loc, i32 0, i32 1
  %loc.2.sroa_cast = bitcast i16 addrspace(5)* %loc.2.sroa_idx to <2 x i16> addrspace(5)*
  %loc.2. = load <2 x i16>, <2 x i16> addrspace(5)* %loc.2.sroa_cast, align 2
  %arrayidx6 = getelementptr inbounds <2 x i16>, <2 x i16> addrspace(1)* %out, i64 1
  store <2 x i16> %loc.2., <2 x i16> addrspace(1)* %arrayidx6, align 4
  %loc.0.sroa_cast2 = bitcast [3 x i16] addrspace(5)* %loc to i8 addrspace(5)*
  ret void
}

; There is another instruction between the misordered instruction and
; the value dependent load, so a simple operand check is insufficient.
define <2 x i16> @chain_hi_to_lo_group_other_dep(i16 addrspace(3)* %ptr) {
; GCN-LABEL: chain_hi_to_lo_group_other_dep:
; GCN:       ; %bb.0: ; %bb
; GCN-NEXT:    s_waitcnt vmcnt(0) expcnt(0) lgkmcnt(0)
; GCN-NEXT:    ds_read_u16_d16_hi v1, v0
; GCN-NEXT:    s_waitcnt lgkmcnt(0)
; GCN-NEXT:    v_pk_sub_u16 v1, v1, -12 op_sel_hi:[1,0]
; GCN-NEXT:    ds_read_u16_d16 v1, v0 offset:2
; GCN-NEXT:    s_waitcnt lgkmcnt(0)
; GCN-NEXT:    v_mov_b32_e32 v0, v1
; GCN-NEXT:    s_setpc_b64 s[30:31]
bb:
  %gep_lo = getelementptr inbounds i16, i16 addrspace(3)* %ptr, i64 1
  %load_lo = load i16, i16 addrspace(3)* %gep_lo
  %gep_hi = getelementptr inbounds i16, i16 addrspace(3)* %ptr, i64 0
  %load_hi = load i16, i16 addrspace(3)* %gep_hi
  %to.hi = insertelement <2 x i16> undef, i16 %load_hi, i32 1
  %op.hi = add <2 x i16> %to.hi, <i16 12, i16 12>
  %result = insertelement <2 x i16> %op.hi, i16 %load_lo, i32 0
  ret <2 x i16> %result
}

; The volatile operations aren't put on the same chain
define <2 x i16> @chain_hi_to_lo_group_other_dep_multi_chain(i16 addrspace(3)* %ptr) {
; GCN-LABEL: chain_hi_to_lo_group_other_dep_multi_chain:
; GCN:       ; %bb.0: ; %bb
; GCN-NEXT:    s_waitcnt vmcnt(0) expcnt(0) lgkmcnt(0)
; GCN-NEXT:    ds_read_u16 v1, v0 offset:2
; GCN-NEXT:    ds_read_u16_d16_hi v0, v0
; GCN-NEXT:    v_mov_b32_e32 v2, 0xffff
; GCN-NEXT:    s_waitcnt lgkmcnt(0)
; GCN-NEXT:    v_pk_sub_u16 v0, v0, -12 op_sel_hi:[1,0]
; GCN-NEXT:    v_bfi_b32 v0, v2, v1, v0
; GCN-NEXT:    s_setpc_b64 s[30:31]
bb:
  %gep_lo = getelementptr inbounds i16, i16 addrspace(3)* %ptr, i64 1
  %load_lo = load volatile i16, i16 addrspace(3)* %gep_lo
  %gep_hi = getelementptr inbounds i16, i16 addrspace(3)* %ptr, i64 0
  %load_hi = load volatile i16, i16 addrspace(3)* %gep_hi
  %to.hi = insertelement <2 x i16> undef, i16 %load_hi, i32 1
  %op.hi = add <2 x i16> %to.hi, <i16 12, i16 12>
  %result = insertelement <2 x i16> %op.hi, i16 %load_lo, i32 0
  ret <2 x i16> %result
}

define <2 x i16> @chain_hi_to_lo_private_other_dep(i16 addrspace(5)* %ptr) {
; GCN-LABEL: chain_hi_to_lo_private_other_dep:
; GCN:       ; %bb.0: ; %bb
; GCN-NEXT:    s_waitcnt vmcnt(0) expcnt(0) lgkmcnt(0)
; GCN-NEXT:    buffer_load_short_d16_hi v1, v0, s[0:3], s33 offen
; GCN-NEXT:    s_waitcnt vmcnt(0)
; GCN-NEXT:    v_pk_sub_u16 v1, v1, -12 op_sel_hi:[1,0]
; GCN-NEXT:    buffer_load_short_d16 v1, v0, s[0:3], s33 offen offset:2
; GCN-NEXT:    s_waitcnt vmcnt(0)
; GCN-NEXT:    v_mov_b32_e32 v0, v1
; GCN-NEXT:    s_setpc_b64 s[30:31]
bb:
  %gep_lo = getelementptr inbounds i16, i16 addrspace(5)* %ptr, i64 1
  %load_lo = load i16, i16 addrspace(5)* %gep_lo
  %gep_hi = getelementptr inbounds i16, i16 addrspace(5)* %ptr, i64 0
  %load_hi = load i16, i16 addrspace(5)* %gep_hi
  %to.hi = insertelement <2 x i16> undef, i16 %load_hi, i32 1
  %op.hi = add <2 x i16> %to.hi, <i16 12, i16 12>
  %result = insertelement <2 x i16> %op.hi, i16 %load_lo, i32 0
  ret <2 x i16> %result
}

define <2 x i16> @chain_hi_to_lo_global_other_dep(i16 addrspace(1)* %ptr) {
; GCN-LABEL: chain_hi_to_lo_global_other_dep:
; GCN:       ; %bb.0: ; %bb
; GCN-NEXT:    s_waitcnt vmcnt(0) expcnt(0) lgkmcnt(0)
; GCN-NEXT:    global_load_ushort v2, v[0:1], off offset:2
; GCN-NEXT:    global_load_short_d16_hi v0, v[0:1], off
; GCN-NEXT:    v_mov_b32_e32 v1, 0xffff
; GCN-NEXT:    s_waitcnt vmcnt(0)
; GCN-NEXT:    v_pk_sub_u16 v0, v0, -12 op_sel_hi:[1,0]
; GCN-NEXT:    v_bfi_b32 v0, v1, v2, v0
; GCN-NEXT:    s_setpc_b64 s[30:31]
bb:
  %gep_lo = getelementptr inbounds i16, i16 addrspace(1)* %ptr, i64 1
  %load_lo = load volatile i16, i16 addrspace(1)* %gep_lo
  %gep_hi = getelementptr inbounds i16, i16 addrspace(1)* %ptr, i64 0
  %load_hi = load volatile i16, i16 addrspace(1)* %gep_hi
  %to.hi = insertelement <2 x i16> undef, i16 %load_hi, i32 1
  %op.hi = add <2 x i16> %to.hi, <i16 12, i16 12>
  %result = insertelement <2 x i16> %op.hi, i16 %load_lo, i32 0
  ret <2 x i16> %result
}

define <2 x i16> @chain_hi_to_lo_flat_other_dep(i16 addrspace(0)* %ptr) {
; GCN-LABEL: chain_hi_to_lo_flat_other_dep:
; GCN:       ; %bb.0: ; %bb
; GCN-NEXT:    s_waitcnt vmcnt(0) expcnt(0) lgkmcnt(0)
; GCN-NEXT:    flat_load_ushort v2, v[0:1] offset:2
; GCN-NEXT:    flat_load_short_d16_hi v0, v[0:1]
; GCN-NEXT:    v_mov_b32_e32 v1, 0xffff
; GCN-NEXT:    s_waitcnt vmcnt(0) lgkmcnt(0)
; GCN-NEXT:    v_pk_sub_u16 v0, v0, -12 op_sel_hi:[1,0]
; GCN-NEXT:    v_bfi_b32 v0, v1, v2, v0
; GCN-NEXT:    s_setpc_b64 s[30:31]
bb:
  %gep_lo = getelementptr inbounds i16, i16 addrspace(0)* %ptr, i64 1
  %load_lo = load volatile i16, i16 addrspace(0)* %gep_lo
  %gep_hi = getelementptr inbounds i16, i16 addrspace(0)* %ptr, i64 0
  %load_hi = load volatile i16, i16 addrspace(0)* %gep_hi
  %to.hi = insertelement <2 x i16> undef, i16 %load_hi, i32 1
  %op.hi = add <2 x i16> %to.hi, <i16 12, i16 12>
  %result = insertelement <2 x i16> %op.hi, i16 %load_lo, i32 0
  ret <2 x i16> %result
}

define <2 x i16> @chain_hi_to_lo_group_may_alias_store(i16 addrspace(3)* %ptr, i16 addrspace(3)* %may.alias) {
; GCN-LABEL: chain_hi_to_lo_group_may_alias_store:
; GCN:       ; %bb.0: ; %bb
; GCN-NEXT:    s_waitcnt vmcnt(0) expcnt(0) lgkmcnt(0)
; GCN-NEXT:    v_mov_b32_e32 v3, 0x7b
; GCN-NEXT:    ds_read_u16 v2, v0
; GCN-NEXT:    ds_write_b16 v1, v3
; GCN-NEXT:    ds_read_u16 v0, v0 offset:2
; GCN-NEXT:    s_waitcnt lgkmcnt(0)
; GCN-NEXT:    v_and_b32_e32 v0, 0xffff, v0
; GCN-NEXT:    v_lshl_or_b32 v0, v2, 16, v0
; GCN-NEXT:    s_setpc_b64 s[30:31]
bb:
  %gep_lo = getelementptr inbounds i16, i16 addrspace(3)* %ptr, i64 1
  %gep_hi = getelementptr inbounds i16, i16 addrspace(3)* %ptr, i64 0
  %load_hi = load i16, i16 addrspace(3)* %gep_hi
  store i16 123, i16 addrspace(3)* %may.alias
  %load_lo = load i16, i16 addrspace(3)* %gep_lo

  %to.hi = insertelement <2 x i16> undef, i16 %load_hi, i32 1
  %result = insertelement <2 x i16> %to.hi, i16 %load_lo, i32 0
  ret <2 x i16> %result
}