test/CodeGen/AMDGPU/schedule-regpressure-lds.ll

; NOTE: Assertions have been autogenerated by utils/update_llc_test_checks.py
; RUN: llc -march=amdgcn -mcpu=gfx1102 -mattr=+wavefrontsize32 -misched=gcn-max-occupancy -verify-machineinstrs < %s | FileCheck %s --check-prefixes=CHECK

; Provide a long sequence of 32 vec4 load/store pairs that ought to be fully
; overlapped for latency hiding. Doing so requires using (at least) 128 VGPRs,
; which (incorrectly) used to look to the scheduler like an occupancy reduction.

; 6 kB of LDS, allows 10 workgroups
@lds = internal addrspace(3) global [384 x <4 x i32>] undef

define internal void @copy(ptr addrspace(1) %src, i32 %ofs) alwaysinline {
  %src.gep = getelementptr <4 x i32>, ptr addrspace(1) %src, i32 %ofs
  %ld = load <4 x i32>, ptr addrspace(1) %src.gep
  %dst.gep = getelementptr <4 x i32>, ptr addrspace(3) @lds, i32 %ofs
  store <4 x i32> %ld, ptr addrspace(3) %dst.gep
  ret void
}

define amdgpu_cs void @test(ptr addrspace(1) %src) "amdgpu-flat-work-group-size"="32,32" {
; CHECK-LABEL: test:
; CHECK:       ; %bb.0:
; CHECK-NEXT:    s_clause 0x1f
; CHECK-NEXT:    global_load_b128 v[2:5], v[0:1], off
; CHECK-NEXT:    global_load_b128 v[6:9], v[0:1], off offset:16
; CHECK-NEXT:    global_load_b128 v[10:13], v[0:1], off offset:32
; CHECK-NEXT:    global_load_b128 v[14:17], v[0:1], off offset:48
; CHECK-NEXT:    global_load_b128 v[18:21], v[0:1], off offset:64
; CHECK-NEXT:    global_load_b128 v[22:25], v[0:1], off offset:80
; CHECK-NEXT:    global_load_b128 v[26:29], v[0:1], off offset:96
; CHECK-NEXT:    global_load_b128 v[30:33], v[0:1], off offset:112
; CHECK-NEXT:    global_load_b128 v[34:37], v[0:1], off offset:128
; CHECK-NEXT:    global_load_b128 v[38:41], v[0:1], off offset:144
; CHECK-NEXT:    global_load_b128 v[42:45], v[0:1], off offset:160
; CHECK-NEXT:    global_load_b128 v[46:49], v[0:1], off offset:176
; CHECK-NEXT:    global_load_b128 v[50:53], v[0:1], off offset:192
; CHECK-NEXT:    global_load_b128 v[54:57], v[0:1], off offset:208
; CHECK-NEXT:    global_load_b128 v[58:61], v[0:1], off offset:224
; CHECK-NEXT:    global_load_b128 v[62:65], v[0:1], off offset:240
; CHECK-NEXT:    global_load_b128 v[66:69], v[0:1], off offset:256
; CHECK-NEXT:    global_load_b128 v[70:73], v[0:1], off offset:272
; CHECK-NEXT:    global_load_b128 v[74:77], v[0:1], off offset:288
; CHECK-NEXT:    global_load_b128 v[78:81], v[0:1], off offset:304
; CHECK-NEXT:    global_load_b128 v[82:85], v[0:1], off offset:320
; CHECK-NEXT:    global_load_b128 v[86:89], v[0:1], off offset:336
; CHECK-NEXT:    global_load_b128 v[90:93], v[0:1], off offset:352
; CHECK-NEXT:    global_load_b128 v[94:97], v[0:1], off offset:368
; CHECK-NEXT:    global_load_b128 v[98:101], v[0:1], off offset:384
; CHECK-NEXT:    global_load_b128 v[102:105], v[0:1], off offset:400
; CHECK-NEXT:    global_load_b128 v[106:109], v[0:1], off offset:416
; CHECK-NEXT:    global_load_b128 v[110:113], v[0:1], off offset:432
; CHECK-NEXT:    global_load_b128 v[114:117], v[0:1], off offset:448
; CHECK-NEXT:    global_load_b128 v[118:121], v[0:1], off offset:464
; CHECK-NEXT:    global_load_b128 v[122:125], v[0:1], off offset:480
; CHECK-NEXT:    global_load_b128 v[126:129], v[0:1], off offset:496
; CHECK-NEXT:    v_mov_b32_e32 v0, 0
; CHECK-NEXT:    s_waitcnt vmcnt(31)
; CHECK-NEXT:    ds_store_b128 v0, v[2:5]
; CHECK-NEXT:    s_waitcnt vmcnt(30)
; CHECK-NEXT:    ds_store_b128 v0, v[6:9] offset:16
; CHECK-NEXT:    s_waitcnt vmcnt(29)
; CHECK-NEXT:    ds_store_b128 v0, v[10:13] offset:32
; CHECK-NEXT:    s_waitcnt vmcnt(28)
; CHECK-NEXT:    ds_store_b128 v0, v[14:17] offset:48
; CHECK-NEXT:    s_waitcnt vmcnt(27)
; CHECK-NEXT:    ds_store_b128 v0, v[18:21] offset:64
; CHECK-NEXT:    s_waitcnt vmcnt(26)
; CHECK-NEXT:    ds_store_b128 v0, v[22:25] offset:80
; CHECK-NEXT:    s_waitcnt vmcnt(25)
; CHECK-NEXT:    ds_store_b128 v0, v[26:29] offset:96
; CHECK-NEXT:    s_waitcnt vmcnt(24)
; CHECK-NEXT:    ds_store_b128 v0, v[30:33] offset:112
; CHECK-NEXT:    s_waitcnt vmcnt(23)
; CHECK-NEXT:    ds_store_b128 v0, v[34:37] offset:128
; CHECK-NEXT:    s_waitcnt vmcnt(22)
; CHECK-NEXT:    ds_store_b128 v0, v[38:41] offset:144
; CHECK-NEXT:    s_waitcnt vmcnt(21)
; CHECK-NEXT:    ds_store_b128 v0, v[42:45] offset:160
; CHECK-NEXT:    s_waitcnt vmcnt(20)
; CHECK-NEXT:    ds_store_b128 v0, v[46:49] offset:176
; CHECK-NEXT:    s_waitcnt vmcnt(19)
; CHECK-NEXT:    ds_store_b128 v0, v[50:53] offset:192
; CHECK-NEXT:    s_waitcnt vmcnt(18)
; CHECK-NEXT:    ds_store_b128 v0, v[54:57] offset:208
; CHECK-NEXT:    s_waitcnt vmcnt(17)
; CHECK-NEXT:    ds_store_b128 v0, v[58:61] offset:224
; CHECK-NEXT:    s_waitcnt vmcnt(16)
; CHECK-NEXT:    ds_store_b128 v0, v[62:65] offset:240
; CHECK-NEXT:    s_waitcnt vmcnt(15)
; CHECK-NEXT:    ds_store_b128 v0, v[66:69] offset:256
; CHECK-NEXT:    s_waitcnt vmcnt(14)
; CHECK-NEXT:    ds_store_b128 v0, v[70:73] offset:272
; CHECK-NEXT:    s_waitcnt vmcnt(13)
; CHECK-NEXT:    ds_store_b128 v0, v[74:77] offset:288
; CHECK-NEXT:    s_waitcnt vmcnt(12)
; CHECK-NEXT:    ds_store_b128 v0, v[78:81] offset:304
; CHECK-NEXT:    s_waitcnt vmcnt(11)
; CHECK-NEXT:    ds_store_b128 v0, v[82:85] offset:320
; CHECK-NEXT:    s_waitcnt vmcnt(10)
; CHECK-NEXT:    ds_store_b128 v0, v[86:89] offset:336
; CHECK-NEXT:    s_waitcnt vmcnt(9)
; CHECK-NEXT:    ds_store_b128 v0, v[90:93] offset:352
; CHECK-NEXT:    s_waitcnt vmcnt(8)
; CHECK-NEXT:    ds_store_b128 v0, v[94:97] offset:368
; CHECK-NEXT:    s_waitcnt vmcnt(7)
; CHECK-NEXT:    ds_store_b128 v0, v[98:101] offset:384
; CHECK-NEXT:    s_waitcnt vmcnt(6)
; CHECK-NEXT:    ds_store_b128 v0, v[102:105] offset:400
; CHECK-NEXT:    s_waitcnt vmcnt(5)
; CHECK-NEXT:    ds_store_b128 v0, v[106:109] offset:416
; CHECK-NEXT:    s_waitcnt vmcnt(4)
; CHECK-NEXT:    ds_store_b128 v0, v[110:113] offset:432
; CHECK-NEXT:    s_waitcnt vmcnt(3)
; CHECK-NEXT:    ds_store_b128 v0, v[114:117] offset:448
; CHECK-NEXT:    s_waitcnt vmcnt(2)
; CHECK-NEXT:    ds_store_b128 v0, v[118:121] offset:464
; CHECK-NEXT:    s_waitcnt vmcnt(1)
; CHECK-NEXT:    ds_store_b128 v0, v[122:125] offset:480
; CHECK-NEXT:    s_waitcnt vmcnt(0)
; CHECK-NEXT:    ds_store_b128 v0, v[126:129] offset:496
; CHECK-NEXT:    s_endpgm
  call void @copy(ptr addrspace(1) %src, i32 0)
  call void @copy(ptr addrspace(1) %src, i32 1)
  call void @copy(ptr addrspace(1) %src, i32 2)
  call void @copy(ptr addrspace(1) %src, i32 3)
  call void @copy(ptr addrspace(1) %src, i32 4)
  call void @copy(ptr addrspace(1) %src, i32 5)
  call void @copy(ptr addrspace(1) %src, i32 6)
  call void @copy(ptr addrspace(1) %src, i32 7)
  call void @copy(ptr addrspace(1) %src, i32 8)
  call void @copy(ptr addrspace(1) %src, i32 9)
  call void @copy(ptr addrspace(1) %src, i32 10)
  call void @copy(ptr addrspace(1) %src, i32 11)
  call void @copy(ptr addrspace(1) %src, i32 12)
  call void @copy(ptr addrspace(1) %src, i32 13)
  call void @copy(ptr addrspace(1) %src, i32 14)
  call void @copy(ptr addrspace(1) %src, i32 15)
  call void @copy(ptr addrspace(1) %src, i32 16)
  call void @copy(ptr addrspace(1) %src, i32 17)
  call void @copy(ptr addrspace(1) %src, i32 18)
  call void @copy(ptr addrspace(1) %src, i32 19)
  call void @copy(ptr addrspace(1) %src, i32 20)
  call void @copy(ptr addrspace(1) %src, i32 21)
  call void @copy(ptr addrspace(1) %src, i32 22)
  call void @copy(ptr addrspace(1) %src, i32 23)
  call void @copy(ptr addrspace(1) %src, i32 24)
  call void @copy(ptr addrspace(1) %src, i32 25)
  call void @copy(ptr addrspace(1) %src, i32 26)
  call void @copy(ptr addrspace(1) %src, i32 27)
  call void @copy(ptr addrspace(1) %src, i32 28)
  call void @copy(ptr addrspace(1) %src, i32 29)
  call void @copy(ptr addrspace(1) %src, i32 30)
  call void @copy(ptr addrspace(1) %src, i32 31)
  ret void
}