llvm/test/CodeGen/AMDGPU/lds-frame-extern.ll

; NOTE: Assertions have been autogenerated by utils/update_llc_test_checks.py
; RUN: llc -mtriple=amdgcn-amd-amdhsa -mcpu=gfx1010 -verify-machineinstrs < %s | FileCheck %s

; LDS is allocated per-kernel. Module scope variables are gathered into a struct which is
; allocated at address zero, if used by the kernel. Kernel scope variables are gathered into
; a per-kernel struct and allocated immediately after the module scope.
; This test checks that the module and kernel scope variables are allocated in deterministic
; order without spurious alignment padding between the two

; External LDS is checked because it influences LDS padding in general and because it will
; not be moved into either module or kernel struct

@module_variable = addrspace(3) global i16 undef

; Variables are allocated into module scope block when used by a non-kernel function
define void @use_module() #0 {
; CHECK-LABEL: use_module:
; CHECK:       ; %bb.0:
; CHECK-NEXT:    s_waitcnt vmcnt(0) expcnt(0) lgkmcnt(0)
; CHECK-NEXT:    s_waitcnt_vscnt null, 0x0
; CHECK-NEXT:    v_mov_b32_e32 v0, 0
; CHECK-NEXT:    ds_write_b16 v0, v0
; CHECK-NEXT:    s_waitcnt lgkmcnt(0)
; CHECK-NEXT:    s_setpc_b64 s[30:31]
  store i16 0, ptr addrspace(3) @module_variable
  ret void
}

; Variables only used by kernels are specialised and allocated per-kernel
@kernel_normal = addrspace(3) global i16 undef
@kernel_overalign = addrspace(3) global i16 undef, align 4

; External LDS shall not introduce padding between module and kernel scope variables
@extern_normal = external addrspace(3) global [0 x float]
@extern_overalign = external addrspace(3) global [0 x float], align 8

; 2^3 cases encoded into function names

define amdgpu_kernel void @module_0_kernel_normal_extern_normal(i32 %idx) #1 {
; CHECK-LABEL: module_0_kernel_normal_extern_normal:
; CHECK:       ; %bb.0:
; CHECK-NEXT:    s_load_dword s0, s[4:5], 0x0
; CHECK-NEXT:    v_mov_b32_e32 v0, 0
; CHECK-NEXT:    v_mov_b32_e32 v1, 2
; CHECK-NEXT:    s_waitcnt lgkmcnt(0)
; CHECK-NEXT:    s_lshl_b32 s0, s0, 2
; CHECK-NEXT:    s_add_i32 s0, s0, 4
; CHECK-NEXT:    v_mov_b32_e32 v2, s0
; CHECK-NEXT:    ds_write_b16 v0, v1
; CHECK-NEXT:    ds_write_b32 v2, v0
; CHECK-NEXT:    s_endpgm
  store i16 2, ptr addrspace(3) @kernel_normal

  %arrayidx1 = getelementptr inbounds [0 x float], ptr addrspace(3) @extern_normal, i32 0, i32 %idx
  store float 0.0, ptr addrspace(3) %arrayidx1
  ret void
}

define amdgpu_kernel void @module_1_kernel_normal_extern_normal(i32 %idx) {
; CHECK-LABEL: module_1_kernel_normal_extern_normal:
; CHECK:       ; %bb.0:
; CHECK-NEXT:    s_add_u32 s8, s8, s11
; CHECK-NEXT:    s_mov_b32 s32, 0
; CHECK-NEXT:    s_addc_u32 s9, s9, 0
; CHECK-NEXT:    s_setreg_b32 hwreg(HW_REG_FLAT_SCR_LO), s8
; CHECK-NEXT:    s_setreg_b32 hwreg(HW_REG_FLAT_SCR_HI), s9
; CHECK-NEXT:    s_add_u32 s0, s0, s11
; CHECK-NEXT:    s_addc_u32 s1, s1, 0
; CHECK-NEXT:    s_getpc_b64 s[8:9]
; CHECK-NEXT:    s_add_u32 s8, s8, use_module@gotpcrel32@lo+4
; CHECK-NEXT:    s_addc_u32 s9, s9, use_module@gotpcrel32@hi+12
; CHECK-NEXT:    s_load_dwordx2 s[10:11], s[8:9], 0x0
; CHECK-NEXT:    s_load_dword s12, s[6:7], 0x0
; CHECK-NEXT:    s_mov_b64 s[6:7], s[4:5]
; CHECK-NEXT:    s_waitcnt lgkmcnt(0)
; CHECK-NEXT:    s_swappc_b64 s[30:31], s[10:11]
; CHECK-NEXT:    s_lshl_b32 s4, s12, 2
; CHECK-NEXT:    v_mov_b32_e32 v0, 0
; CHECK-NEXT:    v_mov_b32_e32 v1, 1
; CHECK-NEXT:    s_add_i32 s4, s4, 4
; CHECK-NEXT:    v_mov_b32_e32 v2, 2
; CHECK-NEXT:    v_mov_b32_e32 v3, s4
; CHECK-NEXT:    ds_write_b16 v0, v1
; CHECK-NEXT:    ds_write_b16 v0, v2 offset:2
; CHECK-NEXT:    ds_write_b32 v3, v0
; CHECK-NEXT:    s_endpgm
  call void @use_module()
  store i16 1, ptr addrspace(3) @module_variable

  store i16 2, ptr addrspace(3) @kernel_normal

  %arrayidx1 = getelementptr inbounds [0 x float], ptr addrspace(3) @extern_normal, i32 0, i32 %idx
  store float 0.0, ptr addrspace(3) %arrayidx1
  ret void
}

define amdgpu_kernel void @module_0_kernel_overalign_extern_normal(i32 %idx) #1 {
; CHECK-LABEL: module_0_kernel_overalign_extern_normal:
; CHECK:       ; %bb.0:
; CHECK-NEXT:    s_load_dword s0, s[4:5], 0x0
; CHECK-NEXT:    v_mov_b32_e32 v0, 0
; CHECK-NEXT:    v_mov_b32_e32 v1, 2
; CHECK-NEXT:    s_waitcnt lgkmcnt(0)
; CHECK-NEXT:    s_lshl_b32 s0, s0, 2
; CHECK-NEXT:    s_add_i32 s0, s0, 4
; CHECK-NEXT:    v_mov_b32_e32 v2, s0
; CHECK-NEXT:    ds_write_b16 v0, v1
; CHECK-NEXT:    ds_write_b32 v2, v0
; CHECK-NEXT:    s_endpgm
  store i16 2, ptr addrspace(3) @kernel_overalign

  %arrayidx1 = getelementptr inbounds [0 x float], ptr addrspace(3) @extern_normal, i32 0, i32 %idx
  store float 0.0, ptr addrspace(3) %arrayidx1
  ret void
}

define amdgpu_kernel void @module_1_kernel_overalign_extern_normal(i32 %idx) {
; CHECK-LABEL: module_1_kernel_overalign_extern_normal:
; CHECK:       ; %bb.0:
; CHECK-NEXT:    s_add_u32 s8, s8, s11
; CHECK-NEXT:    s_mov_b32 s32, 0
; CHECK-NEXT:    s_addc_u32 s9, s9, 0
; CHECK-NEXT:    s_setreg_b32 hwreg(HW_REG_FLAT_SCR_LO), s8
; CHECK-NEXT:    s_setreg_b32 hwreg(HW_REG_FLAT_SCR_HI), s9
; CHECK-NEXT:    s_add_u32 s0, s0, s11
; CHECK-NEXT:    s_addc_u32 s1, s1, 0
; CHECK-NEXT:    s_getpc_b64 s[8:9]
; CHECK-NEXT:    s_add_u32 s8, s8, use_module@gotpcrel32@lo+4
; CHECK-NEXT:    s_addc_u32 s9, s9, use_module@gotpcrel32@hi+12
; CHECK-NEXT:    s_load_dwordx2 s[10:11], s[8:9], 0x0
; CHECK-NEXT:    s_load_dword s12, s[6:7], 0x0
; CHECK-NEXT:    s_mov_b64 s[6:7], s[4:5]
; CHECK-NEXT:    s_waitcnt lgkmcnt(0)
; CHECK-NEXT:    s_swappc_b64 s[30:31], s[10:11]
; CHECK-NEXT:    s_lshl_b32 s4, s12, 2
; CHECK-NEXT:    v_mov_b32_e32 v0, 0
; CHECK-NEXT:    v_mov_b32_e32 v1, 1
; CHECK-NEXT:    s_add_i32 s4, s4, 8
; CHECK-NEXT:    v_mov_b32_e32 v2, 2
; CHECK-NEXT:    v_mov_b32_e32 v3, s4
; CHECK-NEXT:    ds_write_b16 v0, v1
; CHECK-NEXT:    ds_write_b16 v0, v2 offset:4
; CHECK-NEXT:    ds_write_b32 v3, v0
; CHECK-NEXT:    s_endpgm
  call void @use_module()
  store i16 1, ptr addrspace(3) @module_variable

  store i16 2, ptr addrspace(3) @kernel_overalign

  %arrayidx1 = getelementptr inbounds [0 x float], ptr addrspace(3) @extern_normal, i32 0, i32 %idx
  store float 0.0, ptr addrspace(3) %arrayidx1
  ret void
}

define amdgpu_kernel void @module_0_kernel_normal_extern_overalign(i32 %idx) #1 {
; CHECK-LABEL: module_0_kernel_normal_extern_overalign:
; CHECK:       ; %bb.0:
; CHECK-NEXT:    s_load_dword s0, s[4:5], 0x0
; CHECK-NEXT:    v_mov_b32_e32 v0, 0
; CHECK-NEXT:    v_mov_b32_e32 v1, 2
; CHECK-NEXT:    s_waitcnt lgkmcnt(0)
; CHECK-NEXT:    s_lshl_b32 s0, s0, 2
; CHECK-NEXT:    s_add_i32 s0, s0, 8
; CHECK-NEXT:    v_mov_b32_e32 v2, s0
; CHECK-NEXT:    ds_write_b16 v0, v1
; CHECK-NEXT:    ds_write_b32 v2, v0
; CHECK-NEXT:    s_endpgm
  store i16 2, ptr addrspace(3) @kernel_normal

  %arrayidx1 = getelementptr inbounds [0 x float], ptr addrspace(3) @extern_overalign, i32 0, i32 %idx
  store float 0.0, ptr addrspace(3) %arrayidx1
  ret void
}

define amdgpu_kernel void @module_1_kernel_normal_extern_overalign(i32 %idx) {
; CHECK-LABEL: module_1_kernel_normal_extern_overalign:
; CHECK:       ; %bb.0:
; CHECK-NEXT:    s_add_u32 s8, s8, s11
; CHECK-NEXT:    s_mov_b32 s32, 0
; CHECK-NEXT:    s_addc_u32 s9, s9, 0
; CHECK-NEXT:    s_setreg_b32 hwreg(HW_REG_FLAT_SCR_LO), s8
; CHECK-NEXT:    s_setreg_b32 hwreg(HW_REG_FLAT_SCR_HI), s9
; CHECK-NEXT:    s_add_u32 s0, s0, s11
; CHECK-NEXT:    s_addc_u32 s1, s1, 0
; CHECK-NEXT:    s_getpc_b64 s[8:9]
; CHECK-NEXT:    s_add_u32 s8, s8, use_module@gotpcrel32@lo+4
; CHECK-NEXT:    s_addc_u32 s9, s9, use_module@gotpcrel32@hi+12
; CHECK-NEXT:    s_load_dwordx2 s[10:11], s[8:9], 0x0
; CHECK-NEXT:    s_load_dword s12, s[6:7], 0x0
; CHECK-NEXT:    s_mov_b64 s[6:7], s[4:5]
; CHECK-NEXT:    s_waitcnt lgkmcnt(0)
; CHECK-NEXT:    s_swappc_b64 s[30:31], s[10:11]
; CHECK-NEXT:    s_lshl_b32 s4, s12, 2
; CHECK-NEXT:    v_mov_b32_e32 v0, 0
; CHECK-NEXT:    v_mov_b32_e32 v1, 1
; CHECK-NEXT:    s_add_i32 s4, s4, 8
; CHECK-NEXT:    v_mov_b32_e32 v2, 2
; CHECK-NEXT:    v_mov_b32_e32 v3, s4
; CHECK-NEXT:    ds_write_b16 v0, v1
; CHECK-NEXT:    ds_write_b16 v0, v2 offset:2
; CHECK-NEXT:    ds_write_b32 v3, v0
; CHECK-NEXT:    s_endpgm
  call void @use_module()
  store i16 1, ptr addrspace(3) @module_variable

  store i16 2, ptr addrspace(3) @kernel_normal

  %arrayidx1 = getelementptr inbounds [0 x float], ptr addrspace(3) @extern_overalign, i32 0, i32 %idx
  store float 0.0, ptr addrspace(3) %arrayidx1
  ret void
}

define amdgpu_kernel void @module_0_kernel_overalign_extern_overalign(i32 %idx) #1 {
; CHECK-LABEL: module_0_kernel_overalign_extern_overalign:
; CHECK:       ; %bb.0:
; CHECK-NEXT:    s_load_dword s0, s[4:5], 0x0
; CHECK-NEXT:    v_mov_b32_e32 v0, 0
; CHECK-NEXT:    v_mov_b32_e32 v1, 2
; CHECK-NEXT:    s_waitcnt lgkmcnt(0)
; CHECK-NEXT:    s_lshl_b32 s0, s0, 2
; CHECK-NEXT:    s_add_i32 s0, s0, 8
; CHECK-NEXT:    v_mov_b32_e32 v2, s0
; CHECK-NEXT:    ds_write_b16 v0, v1
; CHECK-NEXT:    ds_write_b32 v2, v0
; CHECK-NEXT:    s_endpgm
  store i16 2, ptr addrspace(3) @kernel_overalign

  %arrayidx1 = getelementptr inbounds [0 x float], ptr addrspace(3) @extern_overalign, i32 0, i32 %idx
  store float 0.0, ptr addrspace(3) %arrayidx1
  ret void
}

define amdgpu_kernel void @module_1_kernel_overalign_extern_overalign(i32 %idx) {
; CHECK-LABEL: module_1_kernel_overalign_extern_overalign:
; CHECK:       ; %bb.0:
; CHECK-NEXT:    s_add_u32 s8, s8, s11
; CHECK-NEXT:    s_mov_b32 s32, 0
; CHECK-NEXT:    s_addc_u32 s9, s9, 0
; CHECK-NEXT:    s_setreg_b32 hwreg(HW_REG_FLAT_SCR_LO), s8
; CHECK-NEXT:    s_setreg_b32 hwreg(HW_REG_FLAT_SCR_HI), s9
; CHECK-NEXT:    s_add_u32 s0, s0, s11
; CHECK-NEXT:    s_addc_u32 s1, s1, 0
; CHECK-NEXT:    s_getpc_b64 s[8:9]
; CHECK-NEXT:    s_add_u32 s8, s8, use_module@gotpcrel32@lo+4
; CHECK-NEXT:    s_addc_u32 s9, s9, use_module@gotpcrel32@hi+12
; CHECK-NEXT:    s_load_dwordx2 s[10:11], s[8:9], 0x0
; CHECK-NEXT:    s_load_dword s12, s[6:7], 0x0
; CHECK-NEXT:    s_mov_b64 s[6:7], s[4:5]
; CHECK-NEXT:    s_waitcnt lgkmcnt(0)
; CHECK-NEXT:    s_swappc_b64 s[30:31], s[10:11]
; CHECK-NEXT:    s_lshl_b32 s4, s12, 2
; CHECK-NEXT:    v_mov_b32_e32 v0, 0
; CHECK-NEXT:    v_mov_b32_e32 v1, 1
; CHECK-NEXT:    s_add_i32 s4, s4, 8
; CHECK-NEXT:    v_mov_b32_e32 v2, 2
; CHECK-NEXT:    v_mov_b32_e32 v3, s4
; CHECK-NEXT:    ds_write_b16 v0, v1
; CHECK-NEXT:    ds_write_b16 v0, v2 offset:4
; CHECK-NEXT:    ds_write_b32 v3, v0
; CHECK-NEXT:    s_endpgm
  call void @use_module()
  store i16 1, ptr addrspace(3) @module_variable

  store i16 2, ptr addrspace(3) @kernel_overalign

  %arrayidx1 = getelementptr inbounds [0 x float], ptr addrspace(3) @extern_overalign, i32 0, i32 %idx
  store float 0.0, ptr addrspace(3) %arrayidx1
  ret void
}

attributes #0 = { noinline }
attributes #1 = { "amdgpu-elide-module-lds" }